纳米管钛酸CO处理产物的结构及光催化活性

doi:10.7517/j.issn.1674-0475.2009.02.141

摘要/Abstract

摘要： 研究了在CO气流中,处理温度对纳米管钛酸(NTA)脱水产物TiO₂的结构及C₃H₆光催化氧化反应活性的影响.结果表明:NTA经CO高温处理后,样品未发生C掺杂,只有碳沉积发生;随着处理温度的升高,样品的比表面积大幅下降,与NTA在空气中焙烧处理相比,由锐钛矿向金红石TiO₂转变的温度提前;CO处理后产物对C₃H₆均未表现出可见光催化性能,但具有紫外光催化活性,随着在CO气氛中处理温度的升高,紫外光催化活性降低.

关键词: CO, 纳米管钛酸, C₃H₆光催化, 碳沉积, 晶型转变

Abstract: The structure and photocatalytic activity of the TiO₂ prepared from the treatment of nanotubed titanic acid (NTA) in CO was investigated.The results showed that when NTA was treated in CO at high temperature,the carbon doping in product TiO₂ did not appear,only carbon deposition on TiO₂ appeared;the BET areas of the products decreased markedly with the increase of treating temperature;The transformation temperature from anatase to rutile for TiO₂ obtained by CO treatment was much lower than thatobtained by air treatment.The TiO₂ obtained by CO treatment of NTA were inert in photocatalytic activity under visible-light irradiation,but active under UV-light irradiation,while the UV light photocatalytic activity decreased with the increase of the treating temperature in CO atmosphere.

Key words: CO, nanotubed titanic acid (NTA), photocatalysis, carbon deposition, crystalline form change

中图分类号:

O621

王景菊, 王晓冬, 吴志申, 金振声. 纳米管钛酸CO处理产物的结构及光催化活性[J]. 影像科学与光化学, 2009, 27(2): 141-148.

WANG Jing-ju, WANG Xiao-dong, WU Zhi-shen, JIN Zhen-sheng. Study of the Structure and Photocatalytic Activity of the TiO₂ Prepared from the Treatment of NTA in CO[J]. Imaging Science and Photochemistry, 2009, 27(2): 141-148.

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