钴氮共掺杂TiO_2薄膜的制备及其光电化学性质
Preparation of cobalt and nitrogen codoped TiO2 thin films and their photoelctrochemical performance
查看参考文献21篇
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文摘
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采用溶胶-凝胶法分别制备未掺杂和钴掺杂TiO_2溶胶,室温下将其分别与三乙胺反应制得氮掺杂和(Co,N)共掺杂的TiO_2溶胶,然后通过浸渍-提拉法在钛片上成膜,经烧结获得掺杂光电极.采用XRD、SEM、XPS和紫外-可见光谱和光电流作用谱等对电极进行表征,并探讨其光电响应机理.结果表明:TiO_2共掺杂后并未引起TiO_2能带边缘位置发生明显改变,N主要以NO_x形式掺杂;(Co,N)共掺杂TiO_2薄膜电极的可见光电响应比单掺杂的高,这主要归因于共掺杂TiO_2薄膜电极的比表面积增大、光吸收性能改善、界面电荷转移速率提高以及共掺杂元素的协同作用等. |
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其他语种文摘
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The undoped and cobalt doped TiO_2 sols were prepared using sol-gel method. After addition of triethylamine into the respective sol at room temperature, nitrogen and （Co, N） codoped TiO_2 sols were obtained. Various thin film electrodes were prepared from the sols using dip-coating approach. These films were characterized by XRD, SEM, XPS, UV-Vis absorption spectroscopy and photocurrent action spectra, and their photoelectrochemical response mechanisms under visible light were also discussed. The results show that the （Co, N） codoped TiO_2 electrode exhibits an enhanced incident photon to current efficiency under visible light in comparison with the Co-doped and N doped TiO_2 alone. Codoping dose not shift the position of energy band edges of the electrodes where nitrogen exists in the form of NO_x. The enhanced photoresponse observed can be attributed to the increase in surface area, light absorbance, interface charge transfer rate of photogenerated carriers and cooperation effect between the doping species. |
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来源
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中国有色金属学报
,2007,17(9):1536-1542 【核心库】
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关键词
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TiO2薄膜
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钴氮共掺杂
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光电化学
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可见光
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地址
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1.
福建泉州师范学院,化学系, 泉州, 362000
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浙江大学,化学系, 杭州, 310027
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1004-0609 |
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学科
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化学 |
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基金
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国家自然科学基金
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福建省泉州市科技局重点项目
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文献收藏号
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CSCD:2937195
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