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鈦上陽極氧化生成TiO2光催化薄膜的結(jié)構(gòu)與性能
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TG146

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國家自然科學(xué)基金(10276022)與上海市博士點(diǎn)建設(shè)基金資助項(xiàng)目


Characteristics of Photo-Catalytic Nano Crystalline TiO2 Film Prepared by Electrochemical Oxidation on Titanium
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    摘要:

    研究了電化學(xué)陽極氧化在鈦上制備的納米晶多孔TiO2光催化薄膜的結(jié)構(gòu)與光催化特性。將工業(yè)純鈦片或鈦箔暴露于電介質(zhì)溶液并加一定電壓，鈦表面將氧化生長多孔TiO2薄膜。適當(dāng)控制氧化電壓、溶液溫度，得到非晶氧化膜，再進(jìn)行晶化處理，得到銳鈦礦相納米晶TiO2薄膜。其晶粒尺寸約在10nm～30nm。用SEM，TEM，XRD表征TiO2薄膜的形貌與相結(jié)構(gòu)。用光譜儀測(cè)定了薄膜對(duì)入射光的吸收特性，表明電化學(xué)氧化制備的納米晶二氧化鈦薄膜對(duì)近紫外入射光產(chǎn)生強(qiáng)烈的吸收，顯示納米結(jié)構(gòu)的量子效應(yīng)。測(cè)定了薄膜對(duì)酸性紅溶液的光催化降解效率，結(jié)果表明反應(yīng)30min后薄膜對(duì)酸性紅的光催化降解率可達(dá)95％以上。

    Abstract:

    Photo-catalytic nano titanium dioxide film has been prepared by electrochemical oxidation process. The microstructure and grain morphology in the film are characterized by TEM and XRD. The photo absorption character of the film is measured using spectrometer. It shows that porous amorphous titanium dioxide films are formed by the electrochemical oxidation process in the dielectric solution at an applied voltage and temperature. The amorphous film transforms into nano crystallized titanium dioxide film with anatase structure by means of heat treatment. The oxidation current density decrease with time increase at the voltage of 0~80 V in logarithm law. The grain size in the film is about 20 nm~40 nm. The film has high photo catalytic activity as demonstrated by the degradation test of acid red B in dye solution.

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沈嘉年 宋江江 馬寒冰 武朋飛 肖美群 姚書典.鈦上陽極氧化生成TiO2光催化薄膜的結(jié)構(gòu)與性能[J].稀有金屬材料與工程,2004,33(10):1076~1079.[Shen Jianian, Song Jiangjiang, Ma Hangbin, Wu Pengfei, Xiao Meiqun, Yao Shudiang. Characteristics of Photo-Catalytic Nano Crystalline TiO2 Film Prepared by Electrochemical Oxidation on Titanium[J]. Rare Metal Materials and Engineering,2004,33(10):1076~1079.]
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  • 最后修改日期:2004-04-19
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