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排序方式: 共有135条查询结果,搜索用时 171 毫秒
1.
V. F. Ivanov A. A. Nekrasov K. V. Tcheberiako A. V. Vannikov A. S. Posed'ko S. I. Lishik Yu. V. Trofimov 《Journal of the Society for Information Display》2003,11(1):11-14
Abstract— An all solid‐state photoelectrochromic element (PECE) was developed on the basis of electrochromic layers of WO3 and polyaniline with a layer of polymer electrolyte placed on a base of polyamidosulfoacid, in which a thin‐film CdSxSe1?x photoresistor was used as an electronic key. The dependence of the sensitometric characteristics of the PECE on the applied voltage was studied. 相似文献
2.
J.C. Harper P.A. Christensen T.A. Egerton T.P. Curtis J. Gunlazuardi 《Journal of Applied Electrochemistry》2001,31(6):623-628
The rates of the photoelectrochemical disinfection of Escherichia coli at TiO2 electrodes were measured as a function of concentration and applied potential. Two different TiO2 photoelectrodes were used: a thermally treated titanium plate and a porous film prepared by a sol–gel hydrolysis technique. The kinetics of the disinfection process were found to depend upon the nature of the electrode material. For the thermal film they were first order, and half order for the sol–gel film. It was also found that the catalytic activity per unit surface area of catalyst is many orders of magnitude greater than that observed using TiO2 slurries; this was attributed to the reduced rate of electron-hole recombination afforded by the application of a small potential bias (1 V vs Ag/AgCl), and hence the exploitation of the electric field enhancement (EFE) effect. 相似文献
3.
采用光电化学方法研究了模拟冷却水中硫离子对不锈钢钝化膜的破坏作用.结果表明,不锈钢钝化膜显示n-型光响应,最大吸收峰出现在310 nm处.不锈钢钝化膜在电位约-0.35 V开始出现光电流,随电位升高,光电流增大.钝化膜禁带宽度Eg随电位的升高而减小,并逐渐向铁氧化物的Eg靠近.模拟冷却水中加入硫离子使不锈钢钝化膜的光电流增大,Eg减小.硫离子的浓度越大,测得的光电流越大,而Eg越小,这可归因于钝化膜膜电阻的降低及钝化膜中氧化铬含量的减少. 相似文献
4.
This chapter focuses on multielectron reactions in organized assemblies of molecules at the liquid/liquid interface. We describe the thermodynamic and kinetic parameters of such reactions, including the structure of the reaction centers, charge movement along the electron transfer pathways, and the role of electric double layers in artificial photosynthesis. Some examples of artificial photosynthesis at the oil/water interface are considered, including water photooxidation to the molecular oxygen, oxygen photoreduction, photosynthesis of amphiphilic compounds and proton evolution by photochemical processes. 相似文献
5.
用光电流作用谱、光电流-电势图等光电化学方法研究了聚3-己基噻吩(P3HT)及3-己基噻吩和2-噻吩甲酸共聚物(CTCHT)修饰纳米结构TiO2电极的光电转换性质。结果表明,经修饰后的纳米TiO2电极光电流明显增强,光电转换效率得到明显提高。在复合膜电极中存在p-n异质结,异质结的存在有利于光生电子-空穴对的分离,降低了电荷的反向复合几率,提高了光电转换效率。 相似文献
6.
采用水热法制备了具有闪锌矿和纤维锌矿结构的CdSe纳米棒,纳米棒直径约100 nm,长度约300nm。当电极电势为-0.7 V时聚3-甲基噻吩(PMeT)修饰CdSe纳米棒有最大光电流。CdSe纳米棒/PMeT中存在p-n异质结,p-n异质结存在使得CdSe纳米棒/PMeT复合膜电极在长波区光电流高于CdSe纳米棒薄膜电极光电流。 相似文献
7.
花状氧化锌的制备及光电性能的研究 总被引:2,自引:2,他引:0
采用聚乙二醇(PEG(2000))辅助的水热合成法制备出了粒径较为均匀的花状氧化锌纳米团簇,并用SEM、XRD对其进行了表征.实验结果表明,表面活性剂(PEG-2000)和氨水的加入量对ZnO纳米团簇的形貌有直接的影响;将ZnO纳米团簇均匀涂在导电玻璃的导电面上,在一定温度下煅烧后制成纳米团簇膜电极,并进行了光电化学研究. 相似文献
8.
Qinghua Qian Yuyan Hu Gaofei Wen Xin Feng Xiao-hua Lu 《Frontiers of Chemical Engineering in China》2008,2(3):308-314
A new smooth potassium dititanate film was prepared by sol-gel method and characterized by thermogravimetry (TG) and differential
scanning calorimetry (DSC), X-ray diffraction (XRD), atomic force microscopy (AFM), UV-Visible diffuse reflectance and Raman
spectroscopy. The gaseous photocatalytic activity of smooth K2Ti2O5 films was studied using contact angle analysis from the photocatalytic decomposition of octadecyltrichlorosilane (OTS) based
self-assembled monolayers (SAMs) formed on K2Ti2O5 films. The photocurrent response of the film was determined by an electrochemical method. It was shown that the films were
smooth, compact, and transparent when formed on glass. Compared with TiO2 film, the K2Ti2O5 film showed wide absorption in the ultraviolet and visible region. It was found that the monolayers on K2Ti2O5 decomposed much faster than those on TiO2 under UV irradiation of 254 nm in air. The film also exhibited a stronger photoresponse and a more stable anodic photocurrent.
The K2Ti2O5 film efficiently decomposes the alkylsiloxane monolayers under UVirradiation in air and it was found to be a good photocatalyst
for gaseous organic pollutant treatment.
__________
Translated from Journal of functional materials, 2007, 38(7): 1067–1070, 1073 [译自: 功能材料] 相似文献
9.
Channel electrodes are used to characterize the photochemical DISP2 mechanism in respect of the photoelectro-reductions of
- 1. (i) 9,10-diphenylanthracene,
- 2. (ii) benzophenone and
- 3. (iii) 4-fluorobenzophenone.
10.
Zheng Xie Xiangxuan Liu Weipeng Wang Can Liu Zhengcao Li 《Science and Technology of Advanced Materials》2014,15(5)
TiO2 nanorod arrays (TiO2 NRAs) sensitized with CdS nanoparticles were fabricated via successive ion layer adsorption and reaction (SILAR), and TiO2 NRAs were obtained by oxidizing Ti NRAs obtained through oblique angle deposition. The TiO2 NRAs decorated with CdS nanoparticles exhibited excellent photoelectrochemical and photocatalytic properties under visible light, and the one decorated with 20 SILAR cycles CdS nanoparticles shows the best performance. This can be attributed to the enhanced separation of electrons and holes by forming heterojunctions of CdS nanoparticles and TiO2 NRAs. This provides a promising way to fabricate the material for solar energy conversion and wastewater degradation. 相似文献