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Mid-Temperature Synthesis of CeO_2-TiO_2 Complex Compound and Its XRD Structure Study 认领 引用 被引量：1
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作者 陈林深 吕光烈 胡秀荣 《Journal of Rare Earths》 SCIE EI CAS 2003年第2期108-111,共4页
The CeTi 2O 6, which is formed above 1300 ℃ by ceramic method, was obtained at 700 ℃ using sol gel synthesis method. XRD analysis shows that there is 8% deficient of Ce in the structure. The chemical formula is Ce 0... The CeTi 2O 6, which is formed above 1300 ℃ by ceramic method, was obtained at 700 ℃ using sol gel synthesis method. XRD analysis shows that there is 8% deficient of Ce in the structure. The chemical formula is Ce 0.92 Ti 2O 5.84 , which has a monoclinic structure with space group of C 2/ m . Its cell parameters are a =0.9811(8) nm, b =0.3726(3) nm, c =0.6831(6) nm, and β =118.84°. After being treated at 1300 ℃ for 3 h, the system keeps stable but the deficient disappears, while the chemical formula change to the normal CeTi 2O 6, and the cell parameters are a =0.9813(3) nm, b =0.3752(4) nm, c =0.6883(5) nm, β =119.05°. The key to synthesis the precursors of CeTi 2O 6 is that Ti 4+ and Ce 3+ ions must reach the atomistic distributing state and prevent the oxidation of Ce 3+ during sol gel process. 展开更多
关键词 Semiconductor materials sol gel process CeO 2 TiO 2 complex compound XRD Rietveld analysis rare earths
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Synthesis and photocatalytic activity of TiO_2/conjugated polymer complex nanoparticles 认领 引用 被引量：4
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作者 Shi Xiong Min Fang Wang Lei Feng Yong Chun Tong Zi Rong Yang 《Chinese Chemical Letters》 SCIE CAS 2008年第6期742-746,共5页
A photocatalyst of nanometer TiO2/conjugated polymer complex was successfully synthesized and characterized by spectroscopic methods and photocatalytic experiments. The complex photocatalyst could be activated by abso... A photocatalyst of nanometer TiO2/conjugated polymer complex was successfully synthesized and characterized by spectroscopic methods and photocatalytic experiments. The complex photocatalyst could be activated by absorbing both ultraviolet and visible light （λ = 190-800 nm）. Methylene blue （MB） could be degraded more efficiently on the complex photocatalyst than on the TiO2 under natural light. The conjugated polymer played a promoting role in the photocatalytic degradation of MB. The calcination temperature had an important effect in degradation of dye and could be summarized as 260℃ 〉 300 ℃ 〉 340 ℃ 〉 220 ℃ 〉 180 ℃. 展开更多
关键词 TiO2 Conjugated polymer Complex photocatalyst Methylene blue Degradation Natural light
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TiO2-CdTe电化学发光法测定利巴韦林 认领 引用 被引量：2
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作者 吴可心 田利 +2 位作者 胡玥 王月 陆娟 《分析测试学报》 CAS CSCD 北大核心 2019年第8期1000-1004,共5页
将碲化镉量子点(CdTe)与二氧化钛(TiO2)的复合物修饰至玻碳电极表面,构建了TiO2-CdTe/GCE电化学发光传感平台,并对其电化学发光性质进行研究。在含有联吡啶钌和三正丙胺的碱性缓冲溶液中,TiO2-CdTe/GCE产生很强的电化学发光信号,随着利... 将碲化镉量子点(CdTe)与二氧化钛(TiO2)的复合物修饰至玻碳电极表面,构建了TiO2-CdTe/GCE电化学发光传感平台,并对其电化学发光性质进行研究。在含有联吡啶钌和三正丙胺的碱性缓冲溶液中,TiO2-CdTe/GCE产生很强的电化学发光信号,随着利巴韦林的加入,该体系的电化学发光信号发生明显猝灭,据此建立了一种新的利巴韦林含量的检测方法。在优化实验条件下,利巴韦林在3.9×10-4~3.9μmol·L-1范围内,其浓度的对数与相对电化学发光强度呈现良好的线性关系,检出限为1.3×10-10mol·L-1。对注射液中利巴韦林含量进行测定,回收率为96.6%~101%,结果满意。 展开更多
关键词 TiO2-CdTe复合物 联吡啶钌 电化学发光 利巴韦林
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Catalytic effects of [Ag(H_2O)(H_3PW11O39)]3-on a TiO_2 anode for water oxidation 认领 引用 被引量：2
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作者 Jiansheng Li Lei Wang +3 位作者 Wansheng You Meiying Liu Lancui Zhang Xiaojing Sang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第3期534-541,共8页
A[H3AgI(H2O)PW11O39]3?‐TiO2/ITO electrode was fabricated by immobilizing a molecular polyoxometalate‐based water oxidation catalyst,[H3AgI(H2O)PW11O39]3?(AgPW11),on a TiO2electrode.The resulting electrode was charac... A[H3AgI(H2O)PW11O39]3?‐TiO2/ITO electrode was fabricated by immobilizing a molecular polyoxometalate‐based water oxidation catalyst,[H3AgI(H2O)PW11O39]3?(AgPW11),on a TiO2electrode.The resulting electrode was characterized by X‐ray powder diffraction,scanning electron microscopy,and energy dispersive X‐ray spectroscopy.Linear sweep voltammetry,chronoamperometry,and electrochemical impedance measurements were performed in aqueous Na2SO4solution(0.1molL?1).We found that a higher applied voltage led to better catalytic performance by AgPW11.The AgPW11‐TiO2/ITO electrode gave currents respectively10and2.5times as high as those of the TiO2/ITO and AgNO3‐TiO2/ITO electrodes at an applied voltage of1.5V vs Ag/AgCl.This result was attributed to the lower charge transfer resistance at the electrode‐electrolyte interface for the AgPW11‐TiO2/ITO electrode.Under illumination,the photocurrent was not obviously enhanced although the total anode current increased.The AgPW11‐TiO2/ITO electrode was relatively stable.Cyclic voltammetry of AgPW11was performed in phosphate buffer solution(0.1mol L?1).We found that oxidation of AgPW11was a quasi‐reversible process related to one‐electron and one‐proton transfer.We deduced that disproportionation of the oxidized[H2AgII(H2O)PW11O39]3?might have occurred and the resulting[H3AgIIIOPW11O39]3?oxidized water to O2. 展开更多
关键词 Water oxidation Electrocatalysis Photoelectrochemistry TiO2 Polyoxometalate Ag+ complex
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电化学法制备纳米TiO_2聚邻甲苯胺复合膜 认领 引用 被引量：3
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作者 盛恩宏 褚道葆 沈广霞 《精细化工》 EI CAS 北大核心 2001年第4期212-214,222,共3页
用 3mol·L- 1 酸作为介质 ,扫描速度为 10 0mV·s- 1 ,扫描电位为 - 0 1～ 0 8V ,用循环伏安法在纳米二氧化钛 (Nano TiO2 )膜电极上实现了邻甲苯胺 (o MA)的电化学聚合 ,并对制得Nano TiO2 聚邻甲苯胺 (P -o MA)复合膜的电化... 用 3mol·L- 1 酸作为介质 ,扫描速度为 10 0mV·s- 1 ,扫描电位为 - 0 1～ 0 8V ,用循环伏安法在纳米二氧化钛 (Nano TiO2 )膜电极上实现了邻甲苯胺 (o MA)的电化学聚合 ,并对制得Nano TiO2 聚邻甲苯胺 (P -o MA)复合膜的电化学性质进行了研究。结果表明 :在峰电位 (Ep)为 0 .5 6V处有一个明显的氧化峰 ,在Ep 为 0 .5 8、0 .30和 - 0 .0 4V处分别有一个还原峰 ,经长时间扫描 ,氧化峰电流可达到 5 0A·dm- 2 以上 ,具有工业应用价值。同时实验也表明 ,复合膜的生成、Ip 和Ep 的大小受溶液浓度、扫描速度 (v) 展开更多
关键词 纳米TiO2 聚邻甲苯胺 电化学 复合膜 循环伏安
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TiO_2 微粒的掺杂改性与催化活性 认领 引用 被引量：59
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作者 余锡宾 王桂华 +2 位作者 罗衍庆 陈秀红 朱建 《上海师范大学学报（自然科学版中英文）》 2000年第1期75-82,共8页
用混合溶胶 凝胶法制备了Fe3+,Zn2 +,Pd ,Co2 +,Ni2 +,Cr3+等金属离子掺杂的二氧化钛复合微粒。以四环素降解为目标反应 ,研究了所制备的复合微粒光催化活性与选择性。并用IR、XPS、Raman光谱等技术 ,探讨了影响复合微粒光催化活性的原... 用混合溶胶 凝胶法制备了Fe3+,Zn2 +,Pd ,Co2 +,Ni2 +,Cr3+等金属离子掺杂的二氧化钛复合微粒。以四环素降解为目标反应 ,研究了所制备的复合微粒光催化活性与选择性。并用IR、XPS、Raman光谱等技术 ,探讨了影响复合微粒光催化活性的原因。结果显示 :掺杂Fe3+、Zn2 +的二氧化钛复合微粒对四环素降解具有很高的催化活性与选择性 ;掺杂Pd的复合微粒催化活性也有所提高。而Co2 +,Ni2 +,Cr3+等金属离子掺杂的二氧化钛复合微粒的催化活性呈下降趋势。研究认为 :Fe3+、Zn2 +促进二氧化钛微粒光催化活性的原因是由于这些金属离子高度分散在二氧化钛基质中 ,使基质晶型发生畸变并形成Ti O M桥氧结构 ;这种结构使复合微粒表面缺陷和活性比表面积增加 ,有利于光生载流子的转移。同时 ,Ti/Fe复合微粒中Fe3+有利于活性·OH基团的形成。这些活性·OH基团插入有机物的C H键中 ,最终导致有机物的完全降解矿化。另一方面 ,由于Fe3+,Zn2 +,Pd特殊的电子构型 ,有利于浅度捕获半导体的光生电子 ,使光生电子 空穴对有效分离。而Co2 +,Ni2 +,Cr3+金属离子的电子构型易深度捕获光生电子 ,结果可能形成了电子 空穴复合中心 ; 展开更多
关键词 掺杂 四环素 二氧化钛复合微粒 光催化活性 改性
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基于TiO_2和CdTe荧光共振能量转移的PDT体外灭活HL60细胞实验研究 认领 引用
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作者 罗有焕 张卿 +2 位作者 陈丽 艾保全 熊建文 《激光生物学报》 CAS 2015年第6期506-512,共7页
为研究TiO_2和CdTe量子点间荧光共振能量转移效率对PDT体外灭活HL60细胞的影响,本文以发射波长为407.8nm的TiO_2为供体,CdTe为受体,通过TiO_2与CdTe超声混合构建荧光共振能量转移体系,研究了TiO_2和CdTe量子点间荧光共振能量转移;其中... 为研究TiO_2和CdTe量子点间荧光共振能量转移效率对PDT体外灭活HL60细胞的影响,本文以发射波长为407.8nm的TiO_2为供体,CdTe为受体,通过TiO_2与CdTe超声混合构建荧光共振能量转移体系,研究了TiO_2和CdTe量子点间荧光共振能量转移;其中体系中TiO_2浓度为200μg/mL时,通过逐渐增加体系中CdTe浓度来观察供体TiO_2荧光强度变化,根据Forster能量共振转移理论计算体系能量转移效率。之后将体系用于PDT体外灭活HL60细胞的实验研究,采用CCK-8法,结合酶联免疫检测仪进行细胞活性检测,得出不同浓度下体系的PDT灭活效率。发现当TiO_2-CdTe体系荧光共振能量转移效率20.21%时,PDT灭活效率为53.75%,而当体系能量转移效率为6.77%时,灭活效率达到了71.54%,实验表明在一定浓度范围内,TiO_2-CdTe混合体系荧光共振能量转移效率低时,PDT灭活效率更高。这可能是由于TiO_2-CdTe之间能量共振转移低时,容易致使TiO_2表面光生电子和空穴复合率降低,提高了二氧化钛的光催化活性,导致灭活效率增高。 展开更多
关键词 TiO2-CdTe 共振能量转移 光动力疗法(PDT) 白血病HL60细胞
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负载型 TiO_2-聚丙烯微孔复合膜的制备及性能 认领 引用 被引量：2
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作者 郭清萍 钟顺和 《太原工业大学学报》 1997年第3期83-86,共4页
用熔融浸涂法制备了负载型TiO2－聚丙烯复合膜，采用SEM、压汞、透气性实验手段对其孔径分布、形貌、扩散性能进行了表征。实验结果表明，复合膜表层聚丙烯膜厚为30μm、孔径分布在4～150nm之间时，对CO，H2，N2有较好的渗透性能。
关键词 熔融浸涂法 负载型 聚丙烯膜 二氧化钛
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Investigation of radionuclide 60Co(Ⅱ) binding to TiO_2 by batch technique,surface complexation model and DFT calculations 认领 引用 被引量：6
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作者 REN XueMei YANG ShiTong +2 位作者 TAN XiaoLi CHEN ChangLun WANG XiangKe 《Science China Chemistry》 SCIE EI CAS 2012年第9期1752-1759,共8页
The interaction between radionuclides and solid/water interfaces is important to understand the physicochemical processes of radionuclides in the natural environment.Herein,the interaction of 60Co(Ⅱ) with TiO 2 in aq... The interaction between radionuclides and solid/water interfaces is important to understand the physicochemical processes of radionuclides in the natural environment.Herein,the interaction of 60Co(Ⅱ) with TiO 2 in aqueous solution as a function of pH and ionic strength was studied by using batch technique combined with surface complexation model and density functional theory(DFT) calculations.The batch experimental results showed that the adsorption of 60Co(Ⅱ) was dependent on pH and independent of ionic strength,indicating the formation of inner-sphere surface complexes on TiO 2 surfaces.The results of surface complexation models and DFT calculations indicated that the surface species of 60Co(Ⅱ) adsorbed on TiO 2 followed the trend:B structure(i.e.,60Co(Ⅱ) was linked to one bridge oxygen site) was the dominant surface species at low pH,and TT structure(i.e.,60Co(Ⅱ) was linked to two terminal oxygen sites) became the important surface complex at neutral and alkaline pH values.These results demonstrated that a multi-technique approach could lead to definitive information on the structures of adsorbed 60Co(Ⅱ) at the molecular level at the TiO 2 /water interfaces,as well as realistic models to rationalize and accurately evaluate the macroscopic manifestations of radionuclide adsorption phenomena. 展开更多
关键词 radionuclide ^60Co（Ⅱ） TiO2 interaction surface complexation model DFT calculations
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Photoelectrical performance of nanocrystalline TiO_2 film electrode sensitized by Ru(Ⅱ)-bipyridine complexes 认领 引用 被引量：1
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作者 YANG Rong WANG Weibo +3 位作者 XIAO Xurui HOU Yuanjun ZHANG Baowen GAO Yi 《Chinese Science Bulletin》 1998年第6期473-476,共4页
Two kinds of Ru(Ⅱ)-bipyridine complexes, cis-di(thiocyanate)bis(2,2′-bipyridyl-4,4′-dicarboxylate) ruthenium(Ⅱ) and cis-di(thiocyanate)bis(2,2′-bipyridyl-3,3′-dicarboxylate) ruthenium(Ⅱ), were utilized as the s... Two kinds of Ru(Ⅱ)-bipyridine complexes, cis-di(thiocyanate)bis(2,2′-bipyridyl-4,4′-dicarboxylate) ruthenium(Ⅱ) and cis-di(thiocyanate)bis(2,2′-bipyridyl-3,3′-dicarboxylate) ruthenium(Ⅱ), were utilized as the sensitizers to the nanocrystalline TiO-2 film electrodes. Study shows that the two dyes have quite different sensitization properties due to the strong steric effect of carboxyl groups. In addition, the pretreatment to nanocrystalline TiO-2 film electrodes with TiCl-4 was investigated, which is an effective way to improve the photoelectric conversion performances of sensitized TiO-2 electrodes. 展开更多
关键词 Ru(Ⅱ)-bipyridine complexes nanocrystalline TiO-2 film electrode light-to-electricity conversion efficiency dye sensitization.
电子墨水微胶囊及电泳显示原型器件的制备 认领 引用 被引量：17
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作者 荣宇 吴刚 +1 位作者 陈红征 汪茫 《高等学校化学学报》 SCIE EI CAS 北大核心 2005年第5期982-984,F011,共3页
TiO2 particles coated with polystyrene which were prepared via in situ polymerization and oil green dye were dispersed in tetrachloroethylene and xylene, the mixture came to be electrophoretic ink and was encapsulated... TiO2 particles coated with polystyrene which were prepared via in situ polymerization and oil green dye were dispersed in tetrachloroethylene and xylene, the mixture came to be electrophoretic ink and was encapsulated in to microcapsules by complex coacervation from gelatin and a hydrolyzed copolymer of styrene and maleic anhydride（SMA）. It was demonstrated that the membranes of the microcapsules were formed from nano sized coacervate droplets resulting from gelation and hydrolyzed SMA, which leads to a compact membrane structure. Microcapsules were characterized in terms of microstructure, morphologies by scanning electron microscopy（SEM）. Electrophoretic display prototype was prepared by coating electrophoretic ink microcapsules slurry on ITO glass with nearly single layer and sealed by UV curable adhesives. The characters “Zheda” in Chinese was firstly displayed at a low volt 9 V D.C.. 展开更多
关键词 电泳显示 电子墨水 微胶囊 complex compact display 制备 器件 原型 with and green was the TiO2 nano in via oil to SMA ITO The
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