Effect of quenching medium on photocatalytic activity of nano-TiO2 prepared by solvothermal method

被引：37

作者：

Supphasrirongjaroen, Piyawat ^{[1
]}

Praserthdam, Piyasan ^{[1
]}

Panpranot, Joongjai ^{[1
]}

Na-Ranong, Duangkamol ^{[2
]}

Mekasuwandumrong, Okorn ^{[3
]}

机构：

[1] Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, Thailand

[2] King Mongkuts Inst Technol Ladkrabang, Fac Engn, Dept Chem Engn, Bangkok 10520, Thailand

[3] Silpakorn Univ, Fac Engn & Ind Technol, Dept Chem Engn, Nakhon Pathom 73000, Thailand

来源：

CHEMICAL ENGINEERING JOURNAL | 2008年 / 138卷 / 1-3期

关键词：

titanium dioxide; TiO2; photocatalyst; solvothermal; ethylene decomposition; quenching; defects;

D O I：

10.1016/j.cej.2007.09.035

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Pure anatase nano-TiO2 powders were synthesized by solvothermal method using titanium butoxide as the precursor and were subjected to a rapid quenching in various media such as H2O, H2O2, air, and liquid N-2 as a post-synthesis treatment. By creating a thermal shock effect, quenching process has shown to be an easy novel route for modifying surface defects of the nano-TiO2 and its photocatalytic activity. In this study, the TiO2 sample quenched in air at 77 K contained the highest amount of Ti3+ surface defect with the highest Ti3+/OH and was found to exhibit the highest photocatalytic activity for ethylene decomposition. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：622 / 627

页数：6

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