Synthesis of WO3 catalytic powders: evaluation of photocatalytic activity under NUV/visible light irradiation and alkaline reaction pH

被引：57

作者：

Vamvasakis, I. ^{[1
]}

Georgaki, I. ^{[2
]}

Vernardou, D. ^{[2
]}

Kenanakis, G. ^{[3
]}

Katsarakis, N. ^{[3
]}

机构：

[1] Univ Crete, Dept Mat Sci & Technol, Iraklion 71003, Crete, Greece

[2] Technol Educ Inst Crete, Sch Appl Technol, Ctr Mat Technol & Photon, Iraklion 71004, Crete, Greece

[3] FORTH, Inst Elect Struct & Laser, Iraklion 71110, Crete, Greece

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2015年 / 76卷 / 01期

关键词：

WO3 photocatalytic powders; Sol-gel technique; Acid precipitation technique; Low-temperature hydrothermal treatment; Methylene blue; Alkaline reaction pH; VISIBLE-LIGHT; AQUEOUS-SOLUTION; DEGRADATION; WATER; CONTAMINANTS; OXIDATION; DYES;

D O I：

10.1007/s10971-015-3758-5

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

WO3 catalytic powders were successfully synthesized from tungstic acid and sodium tungstate precursors by simple, low-cost sol-gel and precipitation methods followed by low-temperature hydrothermal treatment. WO3 crystallization process was completed with calcination of the samples at 500 and 700 degrees C. The effects of synthesis method and calcination temperature on the structural, morphological characteristics and surface area of the samples were investigated. The photocatalytic activity of WO3 samples was evaluated by the discoloration efficiency of methylene blue (MB) aqueous solutions under NUV/visible light irradiation at various reaction pH values. The photocatalytic discoloration efficiency of MB was found to increase with increasing reaction pH, with best results obtained at pH 9. [GRAPHICS] .

引用

页码：120 / 128

页数：9

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