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Preparation and Characterization of CeO_2-TiO_2/SnO_2:Sb Films Deposited on Glass Substrates by R.F.Sputtering 认领 引用 被引量：6
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作者 ZHAO Qingnan DONG Yuhong NI Jiamiao WANG Peng ZHAO Xiujian 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2008年第4期443-447,共5页
CeO2-TiO2 films and CeO2-TiO/SnO2：Sb （6 mol%） double films were deposited on glass substrates by radio-frequency magnetron sputtering （R.F. Sputtering）, using SnO2：Sb（6 mol%） target, and CeO2- TiO2 targets wit... CeO2-TiO2 films and CeO2-TiO/SnO2：Sb （6 mol%） double films were deposited on glass substrates by radio-frequency magnetron sputtering （R.F. Sputtering）, using SnO2：Sb（6 mol%） target, and CeO2- TiO2 targets with different molar ratio of CeO2 to TiO2 （CeO2：TiO2-0：1.0; 0.1：0.9; 0.2：0.8; 0.3：0.7; 0.4：0.6; 0.5：0.5; 0.6：0.4; 0.7：0.3; 0.8：0.2; 0.9：0.1; 1.0：0）. The films are characterized by UV-visible transmission and infrared reflection spectra, scanning electron microscopy （SEM）, Raman spectroscopy, X-ray photoelectron spectroscopy （XPS） and X-ray diffraction （XRD）, respectively. The obtained results show that the amorphous phases composed of CeO2-TiO2 play an important role in absorbing UV, there are Ce^3-, Ce^4- and Ti^4- on the surface of the films; the glass substrates coated with CeO2-TiO2 （Ce/Ti=0.5：0.5; 0.6：0.4）/SnO2：Sb（6 mol%） double films show high absorbing UV（〉99）, high visible light transmission （75%） and good infrared reflection （〉70%）. The sheet resistance of the films is 30-50 Ω/□. The glass substrates coated with the double functional films can be used as window glass of buildings, automobile and so on. 展开更多
关键词 coating glass CeO2-TiO/SnO2：Sb double thin films absorbing UV IR reflection R.F. sputterin
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Effect of Heat-treatment on Crystalline Phase and UV Absorption of 60CeO_2-40TiO_2 Thin Films by Magnetron Sputtering 认领 引用 被引量：5
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作者 NI Jiamiao ZHAO Xiujian ZHAO Qingnan 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第5期881-885,共5页
60CeO2-40TiO2 thin films were deposited on soda-lime silicate glass substrates by R.F. magnetron sputtering. The effects of heat-treatment on the UV-absorption of the thin films were studied on the 60CeO2-40TiO2 thin ... 60CeO2-40TiO2 thin films were deposited on soda-lime silicate glass substrates by R.F. magnetron sputtering. The effects of heat-treatment on the UV-absorption of the thin films were studied on the 60CeO2-40TiO2 thin film with the largest UV cut-off wavelength. The sample films with CeO2：TiO2=60：40 were heated at 773 K, 873 K, 973 K for 30 min. These films are characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and X-ray photoelectron spectroscopy and spectrometer （XPS）. XRD analysis proves that the addition of TiO2 to CeO2 changed the crystalline state of CeO2. But the UV absorption effect of CeO2-TiO2 films with CeO2 crystallite phase is inferior to that of the amorphous phase CeO2-TiO2 films. XPS analysis also indicates that the amorphous phase CeO2-TiO2 films have the most Ce3＋ content in these films. Amorphous phase and crystalline phase of the CeO2-TiO2 films have different effects on UV absorption of the thin films. 展开更多
关键词 CeO2-TiO2 thin films UV absorption CeO2 crystallite phase radio frequency magnetron sputtering
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Synthesis and characterization of Sb-doped SnO2-(CeO2-TiO2)composite thin films deposited on glass substrates for antistatic electricity and UV-shielding 认领 引用 被引量：16
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作者 WU Shuo ZHAO Qingnan +1 位作者 MIAO Dengkui DONG Yuhong 《Journal of Rare Earths》 SCIE EI CAS 2010年第S1期189-193,共5页
Sb-doped SnO2(ATO)-(CeO2-TiO2)thin Films were deposited on glass substrates using the mixed solution including CeO2-TiO2 precursor and ATO particles by sol-gel dip coating process.ATO particles were prepared using low... Sb-doped SnO2(ATO)-(CeO2-TiO2)thin Films were deposited on glass substrates using the mixed solution including CeO2-TiO2 precursor and ATO particles by sol-gel dip coating process.ATO particles were prepared using low-temperature hydrothermal process.The mixed molar ratio of ATO to(CeO2-TiO2)vs the properties of CeO2-TiO2 thin film was investigated.The optical properties of the films were characterized by UV-visible transmission and infrared reflection spectra,the sheet resistance of ATO particles and films were measured by rubber sheeter(MYI-50)and four-point probe(HisuperGroup Inc,SDY-5),the surface morphology and structure of the films were analyzed using 3D Digitale Mikroskop and X-ray diffraction(XRD),respectively.The results showed that the ATO precursor solution lost weight completely at about 500 oC,and the ATO particles was obtained,which indicated the same rutile lattice structure as SnO2.The glass substrates coated with ATO-(CeO2-TiO2)thin films showed better properties in antistatic electricity(104-106Ω/),shielding UV(almost 100%),visible light transmission(70%)and infrared reflection(】30%). 展开更多
关键词 antistatic electricity UV shielding ATO-(CeO2-TiO2)thin films hydrothermal process rare earths
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Thickness modulation effect of CeO_2 layer for YBCO films grown by pulsed laser deposition 认领 引用 被引量：4
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作者 Xiang Wu Lin-Fei Liu +3 位作者 Yan-Jie Yao Meng-Lin Wang Bin-Bin Wang Yi-Jie Li 《Rare Metals》 SCIE EI CAS CSCD 2018年第3期225-231,共7页
CeO2 film plays an essential role in nucleation and growth of YBa2 Cu3 O（7-x）（YBCO） films. In this work,the dependence of superconducting properties of YBCO on CeO2 films with different thicknesses was investigate... CeO2 film plays an essential role in nucleation and growth of YBa2 Cu3 O（7-x）（YBCO） films. In this work,the dependence of superconducting properties of YBCO on CeO2 films with different thicknesses was investigated,in order to achieve fabrication of high-performance YBCO coated conductors in industrial scale. The crystalline structure and morphology of CeO2 films with thickness ranging from 21 to 563 nm were systematically characterized by means of X-ray diffraction（XRD）, atomic force microscope（AFM） and reflection high-energy electron diffraction（RHEED）. Additional focus was addressed on evolution of the surface quality of CeO2 films with thickness increasing. The results show that at the optimal thickness of 221 nm, CeO2 film exhibits sharp in-plane and out-of-plane texture with full width of half maximum（FWHM） values of 5.9° and 1.8°, respectively, and smooth surface with a mean root-mean-square（RMS） roughness value as low as 0.6 nm. Combing RHEED and transmission electron microscope（TEM） cross-sectional analysis, it is found that nucleation and growth of CeO2 films at early stage remain in island growth mode with rougher surface,while further increasing the thickness beyond the optimal thickness leads to weak surface quality, consequently resulting in degradation of superconductor layers deposited subsequently. Eventually, a critical current density（Jc） as high as 4.6×10-6 A·cm-（-2）（77 K, self-field） is achieved on a YBCO film on a thickness-modulated CeO2/MgO/Y2 O3/Al2 O3/C276 architecture, demonstrating the advantages of CeO2 films as buffer layer in high-throughput manufacture of coated conductors. 展开更多
关键词 CeO2 films Thickness modulation Pulsed laser deposition Surface quality
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Structure and chemical states of highly eptiaxial CeO_2(001) films grown on SrTiO_3 substrate by laser molecular beam epitaxy 认领 引用
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作者 张俊 魏峰 +3 位作者 杨志民 陈秋云 陈军 王书明 《Journal of Rare Earths》 SCIE EI CAS CSCD 2013年第12期1191-1194,共4页
Highly epitaxial and pure（001）-oriented CeO2 films were grown on SrTiO3（001） substrates by laser molecular beam epitaxy method without any gas ambient.Layer-by-layer epitaxial growth mode of CeO2 was confirmed by ... Highly epitaxial and pure（001）-oriented CeO2 films were grown on SrTiO3（001） substrates by laser molecular beam epitaxy method without any gas ambient.Layer-by-layer epitaxial growth mode of CeO2 was confirmed by in situ reflection high-energy electron diffraction（RHEED） observations.High-resolution X-ray diffraction（HRXRD） and high-resolution transmission electron microscopy（HRTEM） results indicated the STO（100）//CeO2（100）,STO[100]//CeO2 [110] epitaxial relationship for out-of-plane and in-plane,respectively.The formation mechanism of the epitaxial film was also discussed in the light of a theoretical model.Chemical states of the LMBE ceria films were evaluated and evidences for the existence of Ce3＋and oxygen vacancies were presented. 展开更多
关键词 laser molecular beam epitaxy CeO2 thin film oxygen vacancies rare earths
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Preparation and Properties of Dip-coated CeO_2-TiO_2 Thin Golden Glass Film 认领 引用 被引量：1
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作者 李宏 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第3期482-485,共4页
The golden and ultraviolet-absorbed CeO2-TiO2 film was prepared on soda-lime glass substrate with the thickness of 2 mm via the sol-gel method. The transmission spectra in range of 200 nm-800 nm were measured, and the... The golden and ultraviolet-absorbed CeO2-TiO2 film was prepared on soda-lime glass substrate with the thickness of 2 mm via the sol-gel method. The transmission spectra in range of 200 nm-800 nm were measured, and the crystallization, the abrasion and acid resistance were also investigated. The appropriate sol contents and heat-treatment schedule were determined. The results indicate that the appropriate molar ratio of Ce/Ti was 3：5 to 5：6. The ultraviolet-absorbance ability increased with the increase of the Ce/Ti molar ratio, but when the Ce/Ti molar ratio was higher than 1.5, the homogeneity of the film was deteriorated. With the increase of heat-treatment temperature, the main wavelengths of the color of the coated glasses were equal, but the color＇ s saturation decreased; the transmission peaks were the same, while the intensity of the peaks decreased. The roughness, abrasion and acid resistance of the film were also enhanced at the same time. The appropriate heat- treatment temperature may be 340℃. 展开更多
关键词 sol-gel method CeO2-TiO2 film dip-coating process
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Promoting effect of microwave irradiation on CeO2-TiO2 catalyst for selective catalytic reduction of NO by NH3 认领 引用 被引量：20
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作者 Jie Cheng Liyun Song +5 位作者 Rui Wu Shining Li Yanming Sun Hongtai Zhu Wenge Qiu Hong He 《Journal of Rare Earths》 SCIE EI CAS CSCD 2020年第1期59-69,共11页
In this work we prepared several CeO2-TiO2 catalysts for the NH3-SCR reactionusing co-precipitation with assistance of microwave irradiation.The catalytic NH3-SCR activities over CeO2-TiO2 catalysts at low temperature... In this work we prepared several CeO2-TiO2 catalysts for the NH3-SCR reactionusing co-precipitation with assistance of microwave irradiation.The catalytic NH3-SCR activities over CeO2-TiO2 catalysts at low temperatures are largely enhanced by the treatment of microwave irradiation,the operation temperature window is also broadened.For better understanding the promotion mechanism,the catalyst prepared by conventional co-precipitation with and without microwave irradiation treatment was characterized with H2-TPR,NH3-TPD,XPS,XRD and BET.Microwave irradiation treatment accelerates the crystallite rate of CeO2-TiO2 catalysts,and greatly enlarges their surface area by adjusting their microstructures.The resistance to SO2 and H2O is also improved via regulating the hierarchical pore structure by the microwave irradiation.Microwave irradiation treatment can also improve the redox property and increase the acid sites over the catalyst surfaces.The result of in situ DRIFTS suggests that the microwave irradiation treatment generates more Br?nsted acid sites on CeO2-TiO2-2 h catalyst,helpful in SCR reactions.XPS results show that after microwave irradiation on the CeO2-TiO2 catalysts,the surface demonstrates an elevated concentration of chemisorbed oxygen,consequently leading to better oxidation of NO to NO2.Additionally,the molar ratio of Ce3+/Ce4+has been elevated after being treated by microwave irradiation,a vital factor in enhancing the NH3-SCR activities. 展开更多
关键词 SCR catalyst NH3-SCR Low temperature CeO2-TiO2 Microwave irradiation Rare earths
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Catalytic reduction of SO_2 by CO over CeO_2-TiO_2 mixed oxides 认领 引用 被引量：8
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作者 张丽 秦毅红 +3 位作者 陈白珍 彭亚光 何汉兵 袁依 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第11期2960-2965,共6页
The structure and catalytic desulfurization characteristics of CeO2-TiO2 mixed oxides were investigated by means ofX-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and catalytic activity tests. Acco... The structure and catalytic desulfurization characteristics of CeO2-TiO2 mixed oxides were investigated by means ofX-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and catalytic activity tests. According to the results, a CeO2-TiO2solid solution is formed when the mole ratio of cerium to titanium n（Ce）：n（Ti） is 5：5 or greater, and the most suitable n（Ce）：n（Ti） isdetermined as 7：3, over which the conversion rate of SO2 and the yield of sulfur at 500℃ reach 93% and 99%, respectively.According to the activity testing curve, Ce0.7Ti0.3O2 （n（Ce）：n（Ti）=7：3） without any pretreatment can be gradually activated by reagentgas after about 10 min, and reaches a steady activation status 60 min later. The XPS results of Ce0.7Ti0.3O2 after different time ofSO2＋CO reaction show that CeO2 is the active component that offers the redox couple Ce4＋/Ce3＋ and the labile oxygen vacancies, andTiO2 only functions as a catalyst structure stabilizer during the catalytic reaction process. After 48 h of catalytic reaction at 500℃,Ce0.7Ti0.3O2 still maintains a stable structure without being vulcanized, demonstrating its good anti-sulfur poisoning performance. 展开更多
关键词 CeO2-TiO2 mixed oxides solid solution catalytic reduction carbon monoxide sulfur dioxide
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溶胶-凝胶法制备玻璃表面CeO_2-TiO_2紫外吸收薄膜的研究 认领 引用 被引量：12
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作者 董玉红 赵青南 +1 位作者 马鸣明 汪振东 《中国稀土学报》 CAS 北大核心 2009年第3期399-403,共5页
分别以Ce(NO3)3.6H2O和Ti(OC4H9)4为前驱体制备CeO2和TiO2溶胶,通过改变Ce/Ti摩尔比(0/10,1/9,2/8,3/7,4/6,5/5,6/4,7/3,8/2,9/1,10/0)得到一系列复合溶胶,采用提拉法在玻璃基片上制备了CeO2-TiO2紫外吸收膜层。利用紫外-可见光谱、XRD... 分别以Ce(NO3)3.6H2O和Ti(OC4H9)4为前驱体制备CeO2和TiO2溶胶,通过改变Ce/Ti摩尔比(0/10,1/9,2/8,3/7,4/6,5/5,6/4,7/3,8/2,9/1,10/0)得到一系列复合溶胶,采用提拉法在玻璃基片上制备了CeO2-TiO2紫外吸收膜层。利用紫外-可见光谱、XRD对各溶胶以及溶胶沉积的薄膜进行了表征;用SEM观察了镀3层膜和镀7层膜样品的新鲜断面,得到膜厚,借以验证计算所得数据的可用性。结果表明,溶胶的颜色产生变化与溶胶中Ti3+浓度有关;由于CeO2和TiO2相互作用,复合溶胶及其膜层的紫外线吸收能力分别强于纯的CeO2和纯的TiO2,吸收曲线向长波方向移动;膜层中CeO2晶体会使膜面雾化,膜层内的Ce/Ti固溶体或当晶体微小和呈非晶态时,均不影响膜面质量;当薄膜达到一定厚度的时候,紫外线几乎全部被阻隔;在临界厚度内,膜层越厚阻隔效果越好,且对可见光区域的透过率基本无影响,均在70%～80%。 展开更多
关键词 CeO2-TiO2 紫外吸收 溶胶-凝胶法 稀土
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High activity of CeO2-TiO2 composites for deep oxidation of 1,2-dichloroethane 认领 引用 被引量：10
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作者 Jialu Wang Zhinan Shi Renxian Zhou 《Journal of Rare Earths》 SCIE EI CAS CSCD 2020年第8期906-911,I0003,共6页
CeO2-TiO2 catalysts prepared by different methods were investigated for deep oxidation of 1,2-dichloroethane(DCE),as a typical representative of the chlorinated volatile organic compounds(CVOCs).Characterization analy... CeO2-TiO2 catalysts prepared by different methods were investigated for deep oxidation of 1,2-dichloroethane(DCE),as a typical representative of the chlorinated volatile organic compounds(CVOCs).Characterization analysis reveals that CeO2-TiO2 catalysts prepared by sol-gel and coprecipitation methods exhibit higher specific area,CeO2 and TiO2 particles are highly dispersed into each other and the reducibility and mobility of active oxygen species are obviously promoted due to the strong interaction between the two catalysts CeO2 and TiO2,resulting in higher catalytic activity for DCE oxidation to and less chlorinated byproduct.The high calcination temperature would lead to the formation of a new monoclinic phase Ce0.3Ti0.7O2 and sintering,which is the main reason for the catalytic activity for DCE oxidation markedly decreases. 展开更多
关键词 CeO2-TiO2 catalysts Synergism Chlorinated VOCs Catalytic oxidation Rare earths
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磁控溅射法制备CeO_2-TiO_2紫外吸收薄膜 认领 引用 被引量：5
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作者 周学东 倪佳苗 +3 位作者 赵修建 杨晟 龚勇宏 肜建娜 《武汉理工大学学报》 EI CAS 北大核心 2006年第1期7-9,12,共3页
采用射频磁控溅射在玻璃基片上沉积具有紫外吸收CeO2-TiO2混和薄膜。通过制备一系列不同物质的量浓度比的，n（CeO2）：n（TiO2）靶材（1．0：0，0．90：0．10，0．80：020，0．70：0．30，0．60：0．40，0．50：0．50，0．40：0．60，0... 采用射频磁控溅射在玻璃基片上沉积具有紫外吸收CeO2-TiO2混和薄膜。通过制备一系列不同物质的量浓度比的，n（CeO2）：n（TiO2）靶材（1．0：0，0．90：0．10，0．80：020，0．70：0．30，0．60：0．40，0．50：0．50，0．40：0．60，0．30：0．70，0．20：0．80，0．10：0．90，0：1．0），研究其紫外吸收性能最佳的物质的量浓度比：TiO2加入CeO2后，改变CeO2的结晶状态并提高UV吸收．采用Raman和XPS表征薄膜的特性，物质的量浓度比值在n（CeO2）：n（TiO2）=0．5：0．5，0．6：0．4时，薄膜为非晶态，并具有高的紫外吸收（98％）和可见光透过率（70％-80％）；XDS分析表明薄膜存在（F^4＋，Ce^3＋和Ti^4＋。 展开更多
关键词 CeO2-TiO2薄膜 UV吸收 磁控溅射
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Cu网负载CeO_2-TiO_2微纳米复合材料(CeO_2-TiO_2)/Cu的水热制备与性能 认领 引用 被引量：5
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作者 戴春爱 高常锐 冯琳 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2013年第9期2057-2062,共6页
以Cu网为载体,Ti(OBu)4和Ce(NO3)3·6H2O为原料,Na3PO4·12H2O为矿化剂,采用一步水热法制备了多种不同形貌的Cu网负载CeO2-TiO2微纳米复合材料(CeO2-TiO2)/Cu.采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和紫外-可见漫反射分光... 以Cu网为载体,Ti(OBu)4和Ce(NO3)3·6H2O为原料,Na3PO4·12H2O为矿化剂,采用一步水热法制备了多种不同形貌的Cu网负载CeO2-TiO2微纳米复合材料(CeO2-TiO2)/Cu.采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和紫外-可见漫反射分光光度计(UV-Vis DRS)对材料的形貌、结构及光吸收特性进行了表征,通过测试接触角表征了材料的浸润性.以20μmol/L亚甲基蓝(MB)溶液为目标降解物,测试了材料在可见光照射下的催化性能.结果表明,制备的TiO2为锐钛矿型,CeO2为方铈矿型;CeO2晶体比TiO2晶体更易负载于Cu网;改变制备过程中Ce(NO3)3·6H2O的用量、Na3PO4·12H2O浓度、水热反应时间及温度可实现(CeO2-TiO2)/Cu的形貌调控;(CeO2-TiO2)/Cu显示出超亲水性及可见光催化活性. 展开更多
关键词 Cu网 CeO2-TiO2 水热法 形貌 超亲水性 可见光催化
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Improved sulfur-resistant ability on CO oxidation of Pd/Ce0.75Zr0.25O_2 over Pd/CeO_2-TiO_2 and Pd/CeO_2 认领 引用 被引量：3
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作者 沈美庆 林放 +2 位作者 魏光曦 王建强 朱少春 《Journal of Rare Earths》 SCIE EI CAS CSCD 2015年第1期56-61,共6页
The influence of sulfation on Pd/Ce0.75Zr0.25O2, Pd/Ce O2-Ti O2 and Pd/Ce O2 was investigated. Physical structure and chemical properties of different catalysts were characterized by N2 adsorption, X-ray diffraction（... The influence of sulfation on Pd/Ce0.75Zr0.25O2, Pd/Ce O2-Ti O2 and Pd/Ce O2 was investigated. Physical structure and chemical properties of different catalysts were characterized by N2 adsorption, X-ray diffraction（XRD）, CO chemisorption, X-ray photoelectron spectroscopy（XPS）, Fourier transform infrared spectroscopy（FT-IR） and X-ray fluorescence（XRF）. After 10 h SO2 sulfation, it was found that the decrement on CO oxidation catalytic activity was limited on Pd/Ce0.75Zr0.25O2 compared to Pd/Ce O2-Ti O2 and Pd/Ce O2. It demonstrated that Pd/Ce0.75Zr0.25O2 was more sulfur resistant compared to the other two catalysts. After sulfur exposure, catalyst texture was not much influenced as shown by N2 adsorption and XRD, and surface Pd atoms were poisoned indicated by CO chemisorption results. Pd/Ce0.75Zr0.25O2 and Pd/Ce O2-Ti O2 exhibited less sulfur accumulation compared to Pd/Ce O2 in the sulfation process. Furthermore, XPS results clarified that surface sulfur amount, especially surface sulfates amount on the sulfated catalysts was more crucial for the deactivation in sulfur containing environment. 展开更多
关键词 Pd/Ce0.75Zr0.25O2 Pd/CeO2-TiO2 diesel oxidation catalyst SO2 poison XPS rare earths
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Au/CeO_2-TiO_2表面物种在还原和CO氧化过程中的变化 认领 引用 被引量：4
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作者 俞俊 吴贵升 +1 位作者 毛东森 卢冠忠 《化学学报》 SCIE CAS 北大核心 2009年第13期1407-1411,共5页
采用溶胶-凝胶法制备了CeO2-TiO2载体,再用沉积沉淀法制备了Au/CeO2-TiO2催化剂.利用原位漫反射红外(FT-IR),程序升温还原(TPR)、X射线衍射(XRD)、N2吸附-脱附方法考察了催化剂的结构和表面性能.结果表明,CeO2的存在有效抑制TiO2晶粒的... 采用溶胶-凝胶法制备了CeO2-TiO2载体,再用沉积沉淀法制备了Au/CeO2-TiO2催化剂.利用原位漫反射红外(FT-IR),程序升温还原(TPR)、X射线衍射(XRD)、N2吸附-脱附方法考察了催化剂的结构和表面性能.结果表明,CeO2的存在有效抑制TiO2晶粒的长大,增加TiO2的比表面积和晶格应变,从而增强了Au和载体中TiO2的相互作用,使得催化剂表面的氧化能力显著增强.结合原位CO吸附的FT-IR结果表明,不同温度的还原预处理能有效改变催化剂表面氧物种的组成,并对不同氧物种在CO低温氧化过程中的作用进行了分析. 展开更多
关键词 Au催化剂 CO氧化 CeO2-TiO2载体 表面物种
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CeO_2-TiO_2复合光催化剂的制备及日光催化研究 认领 引用 被引量：12
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作者 马琦 张保住 +2 位作者 张志强 任建国 张智敏 《应用化工》 CAS 2005年第3期153-155,共3页
采用水热法,在温和的条件下制备了具有较高光催化活性的CeO2 TiO2复合光催化剂,在太阳光照射下以罗丹明B的光降解为模型反应研究了其光催化活性。结果表明,适量Ce的掺杂能有效提高TiO2的日光催化活性。用FT IR、TG DTA和XRD等进行了性... 采用水热法,在温和的条件下制备了具有较高光催化活性的CeO2 TiO2复合光催化剂,在太阳光照射下以罗丹明B的光降解为模型反应研究了其光催化活性。结果表明,适量Ce的掺杂能有效提高TiO2的日光催化活性。用FT IR、TG DTA和XRD等进行了性能表征。 展开更多
关键词 CeO2-TiO2复合光催化剂 日光催化 水热法
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sol-gel法制备CeO_2-TiO_2/凹凸棒石复合材料的催化性能 认领 引用 被引量：6
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作者 孟英芹 赵晓兵 李霞章 《化工学报》 EI CSCD 北大核心 2013年第7期2679-2686,共8页
以凹凸棒石(ATP)为载体,Ce(NO3)3.6H2O和Ti(OBu)4为原料,冰醋酸为抑制剂,采用溶胶-凝胶法制备CeO2-TiO2/ATP纳米复合材料。利用TG-DSC、TEM、XRD和N2吸附/脱附仪对复合材料进行表征,考察铈钛摩尔比对所制备样品催化降解罗丹明B溶液性能... 以凹凸棒石(ATP)为载体,Ce(NO3)3.6H2O和Ti(OBu)4为原料,冰醋酸为抑制剂,采用溶胶-凝胶法制备CeO2-TiO2/ATP纳米复合材料。利用TG-DSC、TEM、XRD和N2吸附/脱附仪对复合材料进行表征,考察铈钛摩尔比对所制备样品催化降解罗丹明B溶液性能的影响。结果表明,当Ce/Ti≥5/5时,具有立方萤石结构的氧化物颗粒以固溶体形式均匀分布在ATP表面,颗粒尺寸约5～10nm;随Ti 4+的进一步增加,样品中的CeO2结晶不完全;当Ce/Ti<3/7时,样品中出现锐钛矿型TiO2的分离相。适量的Ti 4+掺杂能促进CeO2产生较多的结构缺陷,有利于增加晶格氧空位的浓度,提高样品的催化活性。对罗丹明B的催化降解实验表明,当Ce/Ti=5/5时,样品的催化性能较好,对罗丹明B溶液的化学需氧量(COD)去除率可达96%以上。 展开更多
关键词 凹凸棒石 CeO2-TiO2 催化性能
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中温制备CeO_2-TiO_2复合氧化物及其结构研究 认领 引用 被引量：9
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作者 陈林深 吕光烈 胡秀荣 《中国稀土学报》 CAS 北大核心 2001年第4期334-337,共4页
采用sol gel法在 70 0℃制备出氧化物陶瓷法 130 0℃才能获得的CeTi2 O6 复合氧化物。XRD结构分析表明 ,其晶体结构中存在 8%的Ce缺位 ,化学式为Ce0 .92 Ti2 O5.84 ,单斜晶系 ,空间群C 2 /m ,晶胞参数 :a =0 9811( 8)nm ,b =0 372 6( 3)... 采用sol gel法在 70 0℃制备出氧化物陶瓷法 130 0℃才能获得的CeTi2 O6 复合氧化物。XRD结构分析表明 ,其晶体结构中存在 8%的Ce缺位 ,化学式为Ce0 .92 Ti2 O5.84 ,单斜晶系 ,空间群C 2 /m ,晶胞参数 :a =0 9811( 8)nm ,b =0 372 6( 3)nm ,c =0 6831( 6)nm ,β =118 84°。在 130 0℃焙烧该复合氧化物 ,晶系不变 ,缺位消失 ,化学式转变为正常的CeTi2 O6 ,晶胞参数 :a =0 9813( 3)nm ,b =0 375 2 ( 4)nm ,c =0 6883( 5 )nm ,β =119 0 5°。用sol gel法制备CeTi2 O6 复合氧化物先驱物 ,关键是要保证Ce及Ti原子在溶液 溶胶 凝胶 干凝胶整个过程中原子 (分子 )尺寸范围内的混合状态不被破坏。 展开更多
关键词 稀土 溶胶-凝胶法 CeO2-TiO2复合氧化物 XRD Rietveld分析 二氧化铈 二氧化钛 催化材料 结构
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BaO-CeO_2-TiO_2微波介质陶瓷的烧结特性及物相组成 认领 引用 被引量：2
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作者 周东祥 余晓华 +1 位作者 王鹤 赵俊 《无机材料学报》 SCIE EI CAS 北大核心 2007年第6期1197-1200,共4页
采用TG-DTA、SEM、EDAX、XRD等测试手段研究了BaO-CeO_2-TiO_2微波介质陶瓷的烧结特性及物相组成.BaO-CeO_2-TiO_2的预烧温度和烧结温度分别为900～1100℃和1250～1300℃.结果表明:Ba6-3xCe8+2xTi18O54(x=0.8)在1300℃下烧... 采用TG-DTA、SEM、EDAX、XRD等测试手段研究了BaO-CeO_2-TiO_2微波介质陶瓷的烧结特性及物相组成.BaO-CeO_2-TiO_2的预烧温度和烧结温度分别为900～1100℃和1250～1300℃.结果表明:Ba6-3xCe8+2xTi18O54(x=0.8)在1300℃下烧结后形成了由A、B两相共存的体系,其中A、B两相的元素摩尔比分别为Ce:O=1.0:1.3,Ba:Ti:Ce:O=1.00:6.70:0.35:9.46.此时体系的介电常数为28.72,品质因数为最高值4862.13GHz. 展开更多
关键词 微波介质陶瓷 BaO—CeO2-TiO2 物相组成
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CeO_2-TiO_2/Ti复合膜电极液膜光催化降解染料废水 认领 引用 被引量：2
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作者 李珏秀 徐云兰 +2 位作者 钟登杰 胡学步 贾金平 《环境污染与防治》 CAS CSCD 北大核心 2015年第11期66-71,共6页
采用溶胶-凝胶法制备了CeO_2-TiO_2/Ti复合膜电极,以该复合膜电极为阳极、Cu为阴极,组装高效低耗的斜置双极液膜光催化反应装置,以活性艳红X-3B(RBR)为目标污染物,在可见光激发下进行光催化降解,探讨了电极制备条件对CeO_2-TiO_2/Ti复... 采用溶胶-凝胶法制备了CeO_2-TiO_2/Ti复合膜电极,以该复合膜电极为阳极、Cu为阴极,组装高效低耗的斜置双极液膜光催化反应装置,以活性艳红X-3B(RBR)为目标污染物,在可见光激发下进行光催化降解,探讨了电极制备条件对CeO_2-TiO_2/Ti复合膜电极光催化性能的影响,考察了不同条件对RBR脱色率的影响,并初步探究了可见光光催化降解RBR的机制。结果表明:(1)最佳制备条件为CeO2、TiO2摩尔比(简写为n(Ce∶Ti))1∶10、煅烧温度400℃。线性伏安曲线和紫外—可见漫反射谱图分析表明,该制备条件下得到的CeO_2-TiO_2/Ti复合膜电极具有较明显的可见光响应。(2)在RBR初始质量浓度为20mg/L、RBR废水循环流量为5.10L/h、初始pH为2.0的最佳条件下,可见光光催化90min时,RBR脱色率可达80.8%。(3)RBR光催化降解过程中的紫外—可见分光光度谱图分析表明,CeO_2-TiO_2/Ti复合膜电极液膜光催化降解RBR主要是使其发色基团即偶氮键断裂,并由苯环生成小分子有机酸等中间产物,而不能使其矿化。 展开更多
关键词 CeO2-TiO2/Ti复合膜电极 双极液膜光催化反应装置 可见光 光催化
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射频磁控溅射法制备PI基CeO_2-TiO_2复合薄膜 认领 引用 被引量：1
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作者 刘晓燕 赵玉涛 张松利 《硅酸盐通报》 CAS 北大核心 2007年第6期1068-1072,共5页
采用射频磁控溅射技术在柔性基体PI(聚酰亚胺)上制备了纳米CeO2-TiO2复合薄膜。借助X射线衍射(XRD)、原子力显微镜(AFM)和紫外-可见光谱仪分别研究了薄膜的物相结构、表面生长形貌和薄膜的紫外-可见光透过率及光学能隙,并用WS-2000型薄... 采用射频磁控溅射技术在柔性基体PI(聚酰亚胺)上制备了纳米CeO2-TiO2复合薄膜。借助X射线衍射(XRD)、原子力显微镜(AFM)和紫外-可见光谱仪分别研究了薄膜的物相结构、表面生长形貌和薄膜的紫外-可见光透过率及光学能隙,并用WS-2000型薄膜划痕仪测定薄膜与基体的界面结合强度。实验结果表明:沉积态的薄膜为非晶态,经200℃退火处理4h后,转化为良好的晶态,薄膜中主要含有锐钛矿相结构;溅射功率对薄膜的形貌,光学性能及界面结合力均有影响。尤其当溅射功率为120W时,薄膜的综合性能最优;平均晶粒尺寸110nm,表面粗糙度为160nm,吸光率达80%,光学能隙Eg仅为(2.65±0.05)eV,划痕法测量涂层与基体的附着力为60N。 展开更多
关键词 CeO2-TiO2复合薄膜 PI 微观形貌 透光率 附着力
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