Acceleration effects of phosphate modification on the decay dynamics of photo-generated electrons of TiO2 and its photocatalytic activity

被引：57

作者：

Jing, Liqiang ^{[1
,2
]}

Cao, Yue ^{[1
]}

Cui, Haiqin ^{[1
]}

Durrant, James R. ^{[2
]}

Tang, Junwang ^{[3
]}

Liu, Dening ^{[1
]}

Fu, Honggang ^{[1
]}

机构：

[1] Heilongjiang Univ, Minist Educ, Sch Chem & Mat Sci, Key Lab Funct Inorgan Mat Chem, Harbin 150080, Peoples R China

[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

[3] UCL, Dept Chem Engn, London WC1E 7JE, England

来源：

CHEMICAL COMMUNICATIONS | 2012年 / 48卷 / 87期

基金：

英国工程与自然科学研究理事会;

关键词：

TITANIUM-DIOXIDE; SURFACE MODIFICATION; THERMAL-STABILITY; WATER; NANOPARTICLES; SPECTROSCOPY; MECHANISM; ALCOHOLS;

D O I：

10.1039/c2cc34973f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The surface modification with a proper amount of phosphate accelerates the dynamic decay of photogenerated electrons in the nanocrystalline anatase TiO2 film in the presence of O-2, consequently prolonging greatly the lifetime of photogenerated holes so as to improve the charge separation of TiO2 and then its photocatalytic activity for degrading gas-phase acetaldehyde and liquid-phase phenol mainly based on the transient absorption spectra and the measurements of electrochemical O-2 reduction and the produced hydroxyl radical amount. The acceleration effects are attributed to the increased amount of adsorbed O-2 by means of the curves of O-2 temperature-programmed desorption.

引用

页码：10775 / 10777

页数：3

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