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Preparation and performance of dye-sensitized solar cells based on ZnO-modified TiO_2 electrodes 认领 引用 被引量：2
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作者 Sheng-jun Li Yuan Lin +4 位作者 Wei-wei Tan Jing-bo Zhang Xiao-wen Zhou Jin-mao Chen Zeng Chen 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS 2010年第1期92-97,共6页
The ZnO-modified TiO2 electrode was prepared by adding Zn（CH3COO）2·2H2O to the TiO2 colloid during the sol-gel production process, and was used in dye-sensitized solar cells （DSCs）. The open circuit voltage ... The ZnO-modified TiO2 electrode was prepared by adding Zn（CH3COO）2·2H2O to the TiO2 colloid during the sol-gel production process, and was used in dye-sensitized solar cells （DSCs）. The open circuit voltage （Voc） and fill factor （if） of the cells were improved sig- nificantly. The performances of the ZnO-modified TiO2 electrode such as dark current, transient photocurrent, impedance, absorption spectra, and fiat band potential （Vfb） were investigated. It is found that the interface charge recombination impedance increases and Vfb shifts about 200 mV toward the cathodic potential. The effect mechanism of ZnO modification on the performance of DSCs may be that ZnO occupies the surface states of the TiO2 film. 展开更多
关键词 dye-sensitized solar cells TiO2 electrode modification photoelectrochemical properties
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Enhanced photoelectrocatalytic degradation of ammonia by in situ photoelectrogenerated active chlorine on TiO_2 nanotube electrodes 认领 引用 被引量：2
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作者 Shuhu Xiao Dongjin Wan +2 位作者 Kun Zhang Hongbin Qu Jianfeng Peng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第12期103-108,共6页
TiO2 nanotube （TINT） electrodes anodized in fluorinated organic solutions were successfully prepared on Ti sheets. Field-emission scanning electron microscopy （FE-SEM） and X-ray diffraction （XRD） were performed ... TiO2 nanotube （TINT） electrodes anodized in fluorinated organic solutions were successfully prepared on Ti sheets. Field-emission scanning electron microscopy （FE-SEM） and X-ray diffraction （XRD） were performed to characterize the TiNT electrodes. The linear voltammetry results under irradiation showed that the TiNT electrode annealed at 450℃ presented the highest photoelectrochemical activity. By combining photocatalytic with electrochemical process, a significantly synergetic effect on ammonia degradation was observed with Na2SO4 as supporting electrolyte at pH 10.7. Furthermore, the photoelectrocatalytic efficiency on the ammonia degradation was greatly enhanced in presence of chloride ions without the limitation ofpH. The degradation rate was improved by 14.8 times reaching 4.98 × 10^-2 min^-1 at pH 10.7 and a faster degradation rate of 6.34 × 10^-2 min^-1 was obtained at pH 3.01. The in situ photoelectrocatalytic generated active chlorine was proposed to be responsible for the improved efficiency. On the other hand, an enhanced degradation of ammonia using TiNT electrode fabricated in fluorinated organic solution was also confirmed compared to TiNT electrode anodized in fluorinated water solution and TiO2 film electrode fabricated by sol-gel method. Finally, the effect of chloride concentration was also discussed. 展开更多
关键词 TiO2 nanotube electrodes Ammonia Photoelectrocatalytic process Enhanced degradation
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Photoelectrochemical Character of TiO_2 Nanocrystalline Electrodes Sensitized by Aluminum Phthalocyanines Modified with Sulfonate Groups 认领 引用
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作者 PAN Kai LIU Zhao-yue +2 位作者 WANG Geng BAI Yu-bai LI Tie-jin 《Chemical Research in Chinese Universities》 SCIE EI CAS 2006年第4期484-487,共4页
Particular kinds of TiO2 nanocrystalline electrodes were sensitized by aluminum phthalocyanines modified with sulfonate groups [ Al（OH） PcSm ]. It was found that in the red region, the electrodes show obvious photoe... Particular kinds of TiO2 nanocrystalline electrodes were sensitized by aluminum phthalocyanines modified with sulfonate groups [ Al（OH） PcSm ]. It was found that in the red region, the electrodes show obvious photoelectrical responses. The surface photovoltage spectra and photocurrent action spectra indicate that in the red region, the monomers of aluminum phthalocyanines have a greater influence on the determination of the photoelectrical response of TiO2 electrodes than the dimers. The dye-sensitized solar cells were obtained by using the aluminum phthalocyaninessensitized TiO2 electrodes and Pt electrodes, which have an open circuit photovoltage of 360 mV, a short circuit photocurrent of 39. 4 μA/cm^2 , a fill factor of 0. 54 and a maximum power output of 7.65 μW/cm^2 under a light intensity of 50 mW/cm^2. 展开更多
关键词 Aluminum phthalocyanines [ Al（OH） PcS, ] TiO2 nanocrystalline electrode Photoelectrochemical character
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Electrically enhanced photodegradation of an azodye(Acid Orange II) using a Pt/TiO_2 film electrode irradiating with an UV lamp 认领 引用
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作者 SUJing CHENGuo－hua 《Journal of Environmental Sciences》 SCIE EI CAS 2003年第1期60-64,共5页
A photoelectrochemical process in the degradation of an azodye (Acid Orange II) on a Pt/TiO 2 film electrode was investigated. By using the glass device and the voltage stabilized source of direct current, decolorizat... A photoelectrochemical process in the degradation of an azodye (Acid Orange II) on a Pt/TiO 2 film electrode was investigated. By using the glass device and the voltage stabilized source of direct current, decolorization ratios higher than 78% were observed during a period of 5h. Comparing this value with the sum of the decolorization ratios obtained by a sole application of electrochemical(lower than 3%) and photochemical(about 23%) procedures, a significant synergic effect between both processes was observed. The effects of adscititious voltage and pH value on the decolorization ratios were obvious while the effect of the amount of aeration was minor. 展开更多
关键词 photoelectrochemical process Pt/TiO 2 film electrode synergic effect
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Sensitization of Microporous Nanocrystalline TiO_2 Electrode with Quantum Sized RuS2 Particles 认领 引用
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作者 Jing Huai FANG Lian Yong SU +2 位作者 Jing Wen Uny Xiang Yang ZHANG Zuhng LU 《Chinese Chemical Letters》 SCIE CAS 1997年第5期437-438,共2页
The microporous nanocry'sta1line TiO2 electrode with large surface roughness factor hasbeen prepared on a conducting glass support. Modification of the TiO2 electrode by in situ preparingquantum sized RuS2 particl... The microporous nanocry'sta1line TiO2 electrode with large surface roughness factor hasbeen prepared on a conducting glass support. Modification of the TiO2 electrode by in situ preparingquantum sized RuS2 particles on the surface of TiO2 electrode extends the optical absorptionspectrum and photocurrent action specmim into visible region. In addition, compared with RuS2 bulknlaterials- a blue shifi in both absorption spectrum and photocurrent action speCtrum of RuS2rriO2elcctrode is obserived and explained in terms of quantum sized effect. 展开更多
关键词 TiO Sensitization of Microporous Nanocrystalline TiO2 Electrode with Quantum Sized RuS2 Particles
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Influence of Modification of Counter Electrode on PhotoelectricProperties of Dye-sensitized TiO_2 Solar Cells 认领 引用
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作者 HAOSan-cun FANLe-qing WUJi-huai HUANGYun-fang LINJian-ming 《Chemical Research in Chinese Universities》 SCIE EI CAS 2004年第2期205-209,共5页
A dye-sensitized nanocrystalline TiO 2 solar cell(DYSC) was assembled, of which counter electrode was modified already by platinum, nickel and carbon. It was found that the DYSC had better photoelectric performance wh... A dye-sensitized nanocrystalline TiO 2 solar cell(DYSC) was assembled, of which counter electrode was modified already by platinum, nickel and carbon. It was found that the DYSC had better photoelectric performance when the electrode was modified by platinum than by nickel and carbon. The influence of the incidence light wavelength on the incidence monochromatic photoelectric conversion efficiency(IPCE) was investigated. The result shows that the IPCE mainly depends on the short-circuit current density(I SC) of a DYSC, and the IPCE reaches 48.32% under the irradiation with the wavelength of 560 nm when the counter electrode of a DYSC was modified by platinum. The influence of incident light intensity on the photoelectric properties of a DYSC was also investigated. It was found that the I SC and open-circuit voltage(V OC) increased and the fill factor(f f) of the DYSC decreased with the increase of the incident light intensity. 展开更多
关键词 Dye-sensitized nanocrystalline TiO 2 solar cell Counter electrode Modification Incident light wavelength Incident light intensity
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Electrochemical determination of vitamin C in the presence of uric acid by a novel TiO_2 nanoparticles modified carbon paste electrode 认领 引用 被引量：4
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作者 Mohammad Mazloum-Ardakani Mohammad Ali Sheikh-Mohseni +2 位作者 Hadi Beitollahi Ali Benvidi Hossein Naeimi 《Chinese Chemical Letters》 SCIE CAS 2010年第12期1471-1474,共4页
The electrochemical behavior of vitamin C（ascorbic acid or AA） is investigated on the surface of a carbon-paste electrode modified with TiO2 nanoparticles and 2,2＇-（1,2 butanediylbis（nitriloethylidyne））-bis-hyd... The electrochemical behavior of vitamin C（ascorbic acid or AA） is investigated on the surface of a carbon-paste electrode modified with TiO2 nanoparticles and 2,2＇-（1,2 butanediylbis（nitriloethylidyne））-bis-hydroquinone（BBNBH）.The prepared modified electrode showed an efficient catalytic role in the electrochemical oxidation of AA,leading to remarkable decrease in oxidation overpotential and enhancement of the kinetics of the electrode reaction.This modified electrode exhibits well-separated oxidation peaks for AA and uric acid（UA）.The modified electrode is successfully applied for the accurate determination of AA in pharmaceutical preparations. 展开更多
关键词 Ascorbic acid Uric acid TiO2 nanoparticles Electrocatalysis Modified carbon paste electrode
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Pd-MnO_2 nanoparticles/TiO_2 nanotube arrays(NTAs) photo-electrodes photo-catalytic properties and their ability of degrading Rhodamine B under visible light 认领 引用 被引量：1
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作者 Mohamed Thabit Huiling Liu +1 位作者 Jian Zhang Bing Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2017年第10期53-60,共8页
Pd-MnO2/TiO2 nanotube arrays（NTAs） photo-electrodes were successfully fabricated via anodization and electro deposition subsequently; the obtained Pd-MnO2/TiO2 NTAs photo electrodes were analyzed by scanning electro... Pd-MnO2/TiO2 nanotube arrays（NTAs） photo-electrodes were successfully fabricated via anodization and electro deposition subsequently; the obtained Pd-MnO2/TiO2 NTAs photo electrodes were analyzed by scanning electron microscopy（SEM）, X-ray diffraction（XRD） and characterized accordingly. Moreover, the light harvesting and absorption properties were investigated via ultraviolet–visible diffuse reflectance spectrum（DRS）; photo degradation efficiency was investigated via analyzing the photo catalytic degradation of Rhodamine B under visible illumination（xenon light）. The performed analyses illustrated that Pd-MnO2 codoped particles were successfully deposited onto the surface of the TiO2 nanotube arrays;DRS results showed significant improvement in visible light absorption which was between400 and 700 nm. Finally, the photo catalytic degradation efficiency results of the designated organic pollutant（Rhodamine B） illustrated a superior photocatalytic（PC） efficiency of approximately 95% compared to the bare TiO2 NTAs, which only exhibited a photo catalytic degradation efficiency of approximately 61%, thus it indicated the significant enhancement of the light absorption properties of fabricated photo electrodes and their yield of UOH radicals. 展开更多
关键词 Pd-MnO2/TiO2 Nanotubes Photo electrode Photo degradation Rhodamine B Photo-catalytic efficiency
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Electrophoretic Deposition of TiO2/Nb2O5 Composite Electrode Thin Films for Photovoltaic Application 认领 引用 被引量：1
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作者 John Njagi Nguu Bernard Odhiambo Aduda Francis Wanjala Nyongesa Robinson Juma Musembi 《Journal of Energy and Power Engineering》 CAS 2014年第4期757-764,共8页
Nano sized powders of TiO2 （titanium dioxide） and Nb2O5 （Niobium （V） oxide） were used to fabricate TiO2/Nb2O5 composites thin films by EPD （electrophoretic deposition） technique. The metal oxide powders, toget... Nano sized powders of TiO2 （titanium dioxide） and Nb2O5 （Niobium （V） oxide） were used to fabricate TiO2/Nb2O5 composites thin films by EPD （electrophoretic deposition） technique. The metal oxide powders, together with magnesium nitrate hexahydrate pellets, were suspended in propan-2-ol inside an EPD cell. The electrodes, placed 1.2 cm apart, were partially immersed in the suspension and a DC potential applied across them. Key EPD process parameters, which include applied DC electric field, deposition time and solid concentration in suspension, were optimized through visual inspection and from UV-Vis-NIR spectrophotometer spectra. The highest （55%） transmittance was obtained for films with deposition time of 90 s, powder concentration of 0.01 g/40 mL, and 35 V DC （direct current） voltage. XRD micrographs confirmed that TiO2 and Nb2O5 particles were presented in the composite film. SEM （scanning electron microscope） micrographs of the composite electrode thin films showed that porous films of high quality with well controlled morphology were deposited by using the EPD technique. 展开更多
关键词 Electrophoretic deposition TiO2/Nb2O5 composite electrode thin films.
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Effect of H-type Aggregation on the Photoelectric Conversion of Tetrasulfonated Phthalocyanine Adsorbed on Nanostructured TiO_2 Electrode 认领 引用
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作者 邓慧华 方靖淮 +3 位作者 顾建华 陆祖宏 毛海舫 许慧君 《Journal of Southeast University(English Edition)》 CAS 1997年第1期82-87,共6页
Tetrasulfonated Zn,Co,Ga,In,TiO and metal free phthalocyanine (MTsPc) mainly exist as dimers on the nanostructured TiO 2 electrode and mostly exist as monomers in dimethyl sulfoxide. The photocurrent action spectra of... Tetrasulfonated Zn,Co,Ga,In,TiO and metal free phthalocyanine (MTsPc) mainly exist as dimers on the nanostructured TiO 2 electrode and mostly exist as monomers in dimethyl sulfoxide. The photocurrent action spectra of the liquid junction based on the MTsPc/TiO 2 nanostructured electrode show that only the absorbance of the MTsPc monomer contributes to a photocurrent while that of the MTsPc face to face dimer does not generate a photocurrent. 展开更多
关键词 H type aggregation dimer tetrasulfonated phthalocyanine photoelectric conversion the nanostructured TiO 2 electrode
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Photoelectrocatalytic Oxidation of Ethinylestradiol on a Ti/TiO2Electrode: Degradation Efficiency and Search for By-Products 认领 引用
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作者 Karla Moreira Vieira Fabiana Maria Monteiro Paschoal +2 位作者 Maria Valnice Boldrin Zanoni Clésia Cristina Nascentes Rodinei Augusti 《Green and Sustainable Chemistry》 2014年第3期151-161,共11页
The degradation of ethinylestradiol (EE, an orally bio-active estrogen) in an aqueous-methanolic solution using a Ti/TiO2 thin-film electrode and UV radiation (a photoelectrocatalytic system) was evaluated. Hence, HPL... The degradation of ethinylestradiol (EE, an orally bio-active estrogen) in an aqueous-methanolic solution using a Ti/TiO2 thin-film electrode and UV radiation (a photoelectrocatalytic system) was evaluated. Hence, HPLC/UV analysis shows that EE (at 0.34 mmol) is totally consumed after 30 minutes of exposure to the photoelectrocatalytic system in the presence of Na2SO4 (0.1 mol·L-1) and with an applied bias potential of +1.0 V versus the Ag/AgCl reference electrode. Moreover, monitoring by direct infusion electrospray ionization mass spectrometry (ESI-MS) and SPME-GC/ MS (solid phase microextraction coupled with gas chromatography-mass spectrometry) reveals that apparently no degradation products are formed under these conditions. Hence, this study demonstrates that the photoelectrocatalytic system can be efficiently used to promote the complete degradation (and likely mineralization) of this hormone under these conditions. 展开更多
关键词 Photoelectrocatalytic Oxidation Ethinylestradiol Ti/TiO2 Thin-Film Electrode Degradation Efficiency Search for By-Products
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Effect of Nano Size TiO2Particles on Mechanical Properties of AWS E 11018M Type Electrode 认领 引用
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作者 Tapan Kumar Pal Utpal Kumar Maity 《Materials Sciences and Applications》 2011年第9期1285-1292,共8页
Addition of nano size particles of TiO2 in the coating of shielded metal arc welding electrode (E 11018M) partially substituting the conventional micro size TiO2 was studied for possible enhanced electrode characteris... Addition of nano size particles of TiO2 in the coating of shielded metal arc welding electrode (E 11018M) partially substituting the conventional micro size TiO2 was studied for possible enhanced electrode characteristics. The results show that the nano size particle of TiO2 improved recovery of elements such as Mn, Ni, Mo, Ti etc. as well as increased all-weld-metal tensile and charpy impact properties at –51℃. Furthermore, the charpy impact properties were found to be very sensitive to variations in Ti content of the weld deposit. 展开更多
关键词 High Strength Steel Coated Electrode Nano Size Tio2 Strength and Toughness
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Resistive Switching Memory of TiO2 Nanowire Networks Grown on Ti Foil by a Single Hydrothermal Method 认领 引用 被引量：4
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作者 Ming Xiao Kevin P.Musselman +1 位作者 Walter W.Duley Norman Y.Zhou 《Nano-Micro Letters》 SCIE EI CAS 2017年第2期23-31,共9页
The resistive switching characteristics of TiO_2 nanowire networks directly grown on Ti foil by a single-step hydrothermal technique are discussed in this paper. The Ti foil serves as the supply of Ti atoms for growth... The resistive switching characteristics of TiO_2 nanowire networks directly grown on Ti foil by a single-step hydrothermal technique are discussed in this paper. The Ti foil serves as the supply of Ti atoms for growth of the TiO_2 nanowires, making the preparation straightforward. It also acts as a bottom electrode for the device. A top Al electrode was fabricated by e-beam evaporation process. The Al/TiO_2 nanowire networks/Ti device fabricated in this way displayed a highly repeatable and electroforming-free bipolar resistive behavior with retention for more than 10~4 s and an OFF/ON ratio of approximately 70. The switching mechanism of this Al/TiO_2 nanowire networks/Ti device is suggested to arise from the migration of oxygen vacancies under applied electric field. This provides a facile way to obtain metal oxide nanowire-based Re RAM device in the future. 展开更多
关键词 TiO2 nanowire networks Resistive switching memory Ti foil Hydrothermal process Al electrode
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Influence of Yb-Doped Nanoporous TiO2 Films on Photovoltaic Performance of Dye-Sensitized Solar Cells 认领 引用 被引量：2
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作者 徐炜炜 戴松元 +2 位作者 胡林华 梁林云 王孔嘉 《Chinese Physics Letters》 SCIE EI CAS 2006年第8期2288-2291,共4页
Yb-doped TiO2 pastes with different Yb/TiO2 weight ratios are prepared in the sol-gel process to obtain dyesensitized solar cells （DSCs）. The nanocrystalline size of Yb-TiO2 becomes smaller and the lattice parameter... Yb-doped TiO2 pastes with different Yb/TiO2 weight ratios are prepared in the sol-gel process to obtain dyesensitized solar cells （DSCs）. The nanocrystalline size of Yb-TiO2 becomes smaller and the lattice parameters change. Lattice distortion is observed and dark current is detected. It is found that a part of Yb existing as insulating oxide Yb2O3 state acts as barrier layers at the electrode-electrolyte interface to suppress charge recombination. A Yb-doped TiO2 electrode applied in DSCs leads to a higher open-circuit voltage and a higher fill factor. How the Yb-doped TiO2 films affect the photovoltaic response of DSCs is discussed. 展开更多
关键词 STRONTIUM-TITANATE COLLOIDAL TIO2 CONVERSION ELECTRODES EFFICIENCY LIGHT OXIDE ZINC SPECTROSCOPY LAYER
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TiO2@MgO Core-Shell Film:Fabrication and Application to Dye-Sensitized Solar Cells 认领 引用 被引量：1
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作者 LI Bihui LüGang +1 位作者 LUO Lijuan TANG Yiwen 《Wuhan University Journal of Natural Sciences》 CAS 2010年第4期325-329,共5页
In this study,TiO2@MgO core-shell film was obtained by using a simple chemical bath deposition method to coat a thin MgO film around TiO2 nanoparticles.The core-shell configuration was characterized by X-ray diffracto... In this study,TiO2@MgO core-shell film was obtained by using a simple chemical bath deposition method to coat a thin MgO film around TiO2 nanoparticles.The core-shell configuration was characterized by X-ray diffractometer(XRD),scanning elec-tron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),and high-resolution transmission electron microscopy(HRTEM).Lattice fringes were observed for the TiO2 particles,and the MgO shell showed an amorphous structure,revealing a clear distinction between the core and shell materials.Applying the core-shell film as photoanode to the dye-sensitized solar cells(DSSCs),it shows a superior performance compared to the pure TiO2 electrode.Under the illumination of simulated sunlight(75 mW-cm-2),the short circuit photocurrent(Jsc),the open circuit photovoltage(Voc),and the fill factor(fF)are 8.80 mA-cm-2,646 mV,and 0.69,respectively,and the conversion efficiency(η)in-creased by 21.8%(from 4.32%to 5.26%)when dipping for opti-mum condition. 展开更多
关键词 TiO2@MgO core-shell electrode dye-sensitized solar cell(DSSC)
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在具有现场合成H_2O_2电极的TiO_2光催化反应体系中降解SDS 认领 引用 被引量：1
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作者 蔡乃才 黄行九 +2 位作者 霍耀东 王亚平 王鄂凤 《武汉大学学报（理学版）》 EI CAS 2000年第6期663-666,共4页
采用一种新型空气 (氧 )电极作现场光化学反应的 H2 O2 发生源 .该电极用空气中的氧作反应原料 ,在电极的电催化作用下生成 H2 O2 ,电流效率最高可达 90 % ,而且对溶液的 p H适应范围较广 .将这种新型的空气(氧 )电极引入光催化反应系... 采用一种新型空气 (氧 )电极作现场光化学反应的 H2 O2 发生源 .该电极用空气中的氧作反应原料 ,在电极的电催化作用下生成 H2 O2 ,电流效率最高可达 90 % ,而且对溶液的 p H适应范围较广 .将这种新型的空气(氧 )电极引入光催化反应系中 ,使“光化学氧化反应”和“光催化氧化反应”同时发生在同一体系 ,在不改变光照条件下可提高有机污染物的光氧化速度 .本实验测定结果表明 :在含空气 (氧 )电极的光催化反应体系中 ,十二烷基磺酸钠 ( SDS) 展开更多
关键词 空气(氧)电极 TiO2 光催化 光化学氧化
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聚3,4-乙烯二氧噻吩/碳纳米管/TiO2电化学传感器构建及其在细胞检测中的应用 认领 引用
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作者 厉婷 徐加泉 黄卫华 《分析科学学报》 CAS CSCD 北大核心 2020年第5期701-709,共9页
本文结合TiO2优良的光催化降解性能,以及电化学传感材料PEDOT/PSS和CNTs的优良电化学性能及抗污染性能,采用一种直接拉制技术,简便、快捷地制备了PEDOT/CNTs/TiO2复合纤维,其长度可达10cm,直径最小可至3μm。在此基础上,分别构建了兼具... 本文结合TiO2优良的光催化降解性能,以及电化学传感材料PEDOT/PSS和CNTs的优良电化学性能及抗污染性能,采用一种直接拉制技术,简便、快捷地制备了PEDOT/CNTs/TiO2复合纤维,其长度可达10cm,直径最小可至3μm。在此基础上,分别构建了兼具抗污染性能和光致清洁性能的平面微米线电极及单根微米线电极,用于监测内皮细胞释放NO。结果显示,所制电极具有良好的电化学性能,对NO的检出限可达4nmol/mL;在培养基中浸泡34h后,其电化学性能无明显变化,表现出良好的抗污染性能;在彻底污染后(无电化学响应),经紫外光照30min后,其电化学性能可恢复至初始的30%,表现出一定的光致清洁能力。 展开更多
关键词 电化学传感器 光致清洁 PEDOT/CNTs/TiO_2纤维 抗污染 一氧化氮
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纳米SnO_2/TiO_2半导体薄膜电极的制备及其光电响应性能 认领 引用 被引量：2
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作者 赵玮婷 徐瑞芬 付国柱 《北京化工大学学报（自然科学版）》 EI CAS 2004年第6期52-55,共4页
采用化学沉积和电镀的方法在ITO导电玻璃表面制备SnO2 /TiO2 纳米半导体薄膜电极 ,用SEM ,XRD进行了物性表征 ,并用光电流 时间曲线、循环伏安法研究了薄膜电极光电流响应随时间、电压的变化情况。研究结果表明 ,SnO2 的掺杂有助于TiO2... 采用化学沉积和电镀的方法在ITO导电玻璃表面制备SnO2 /TiO2 纳米半导体薄膜电极 ,用SEM ,XRD进行了物性表征 ,并用光电流 时间曲线、循环伏安法研究了薄膜电极光电流响应随时间、电压的变化情况。研究结果表明 ,SnO2 的掺杂有助于TiO2 薄膜表面产生的气孔孔径增大 ,数量变多。此法可制备具有多孔、粒径小于 10 0nm的纳米SnO2 /TiO2 半导体薄膜电极。与纯纳米TiO2 薄膜电极相比 ,在光照条件下SnO2 的掺杂使得复合薄膜电极在阳极峰电位下的阳极峰电流的响应程度明显大于纯纳米TiO2 薄膜电极响应程度 ,有利于提高光生载流子的运输和分离效率 ,并从机理上阐述了光电流响应的提高归因于不同能级半导体之间的耦合效应。 展开更多
关键词 SnO2/TiO2 薄膜电极 耦合效应
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Engineering two-dimensional pores in freestanding TiO_2/graphene gel film for high performance lithium ion battery 认领 引用
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作者 Xiaojun Yan Yuanyuan Wang +6 位作者 Congcong Liu Min Guo Jingying Tao Jing Cao Dongju Fu Liyi Dai Xiaowei Yang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第1期176-182,共7页
As the key component of electrochemical energy storage devices, an electrode with superior ions transport pores is the important premise for high electrochemical performance. In this paper, we developed a unique solut... As the key component of electrochemical energy storage devices, an electrode with superior ions transport pores is the important premise for high electrochemical performance. In this paper, we developed a unique solution process to prepare freestanding TiO_2/graphene hydrogel electrode with tunable density and porous structures. By incorporating room temperature ionic liquids（RTILs）, even upon drying, the non-volatile RTILs that remained in the gel film would preserve the efficient ion transport channels and prevent the electrode from closely stacking, to develop dense yet porous structures. As a result, the dense TiO_2/graphene gel film as an electrode for lithium ion battery displayed a good gravimetric electrochemical performance and more importantly a high volumetric performance. 展开更多
关键词 TiO2/graphene gel electrode Pore engineering Ions transport channels Lithium ion battery Volumetric performance
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Photovoltaic Properties of CdSe Quantum Dot Sensitized Inverse Opal TiO2Solar Cells: The Effect of TiCl4Post Treatment 认领 引用
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作者 Motoki Hironaka Taro Toyoda +3 位作者 Kanae Hori Yuhei Ogomi Shuzi Hayase Qing Sheng 《Journal of Modern Physics》 2017年第4期522-530,共9页
Recently, semiconductor quantum dot (QD) sensitized solar cells (QDSSCs) are expected to achieve higher conversion efficiency because of the large light absorption coefficient and multiple exciton generation in QDs. T... Recently, semiconductor quantum dot (QD) sensitized solar cells (QDSSCs) are expected to achieve higher conversion efficiency because of the large light absorption coefficient and multiple exciton generation in QDs. The morphology of TiO2 electrode is one of the most important factors in QDSSCs. Inverse opal (IO) TiO2 electrode, which has periodic mesoporous structure, is useful for QDSSCs because of better penetration of electrolyte than conventional nanoparticulate TiO2 electrode. In addition, the ordered three dimensional structure of IO-TiO2 would be better for electron transport. We have found that open circuit voltage Voc of QDSSCs with IO-TiO2 electrodes was much higher (0.2 V) than that with nanoparticulate TiO2 electrodes. But short circuit current density Jsc was lower in the case of IO-TiO2 electrodes because of the smaller surface area of IO-TiO2. In this study, for increasing surface area of IO-TiO2, we applied TiCl4 post treatment on IO-TiO2 and investigated the effect of the post treatment on photovoltaic properties of CdSe QD sensitized IO-TiO2 solar cells. It was found that Jsc could be enhanced due to TiCl4 post treatment, but decreased again for more than one cycle treatment, which indicates excess post treatment may lead to worse penetration of electrolyte. Our results indicate that the appropriate post treatment can improve the energy conversion efficiency of the QDSSCs. 展开更多
关键词 Quantum Dot Sensitized Solar Cells Inverse Opal Structure TiCl4 Post Treatment Morphology of the TiO2 Electrode
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