Photocatalytic activity and photoinduced hydrophilicity of brookite-heteropolyacid hybrid films

被引：5

作者：

Pruethiarenun, Kunchaya ^{[1
]}

Isobe, Toshihiro ^{[1
]}

Matsushita, Sachiko ^{[1
]}

Nakajima, Akira ^{[1
]}

机构：

[1] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 2012年 / 445卷

关键词：

Brookite; Photocatalyst; Layer-by-layer; Keggin; Hydrophilicity; VISIBLE-LIGHT IRRADIATION; SELF-ASSEMBLED MONOLAYERS; PROBE FORCE MICROSCOPY; TITANIUM-DIOXIDE; UV ILLUMINATION; THIN-FILMS; WETTABILITY CONVERSION; AQUEOUS-SOLUTIONS; ORGANIC-COMPOUNDS; PHOSPHORIC-ACID;

D O I：

10.1016/j.apcata.2012.08.030

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

After transparent hybrid films of brookite (TiO2) and 12 tungsto(VI) phosphoric acid (PW12) were prepared using layer-by-layer (LBL) processing, a comparative study of photocatalytic decomposition activity and photoinduced hydrophilicity for the films was conducted using gaseous 2-propanol (IPA) decomposition and sessile drop method. The UP (TiO2/TiO2/PW12) film exhibited better photocatalytic activity on the decomposition of gaseous IPA than that of the TT (TiO2/TiO2) film. Moreover, the UP film provided a higher hydrophilization rate under UV illumination, and provided better sustainability of the hydrophilicity in the dark than the TT film did. The generation of PW12- by electron transfer from TiO2 to PW12 was inferred as a key factor underpinning the overall performance of wettability conversion before and after UV illumination on this hybrid film. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：274 / 279

页数：6

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