Photocatalytic degradation of phenol by semiconducting mixed oxides derived from Zn(Ga)Al layered double hydroxides

被引：62

作者：

Prince, Julia ^{[1
]}

Tzompantzi, Francisco ^{[2
]}

Mendoza-Damian, G. ^{[2
]}

Hernandez-Beltran, F. ^{[3
]}

Valente, Jaime S. ^{[3
]}

机构：

[1] UAM Azcapotzalco, Mexico City 02200, DF, Mexico

[2] UAM Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico

[3] Inst Mexicano Petr, Mexico City 07730, DF, Mexico

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2015年 / 163卷

关键词：

Layered double hydroxides; Semiconductors; Photocatalysis; Phenol degradation; Band gap energy; THERMAL-DECOMPOSITION; GALLIUM OXIDE; NANOPARTICLES; HYDROTALCITE; PERFORMANCE; SYSTEMS; WATER; LDHS;

D O I：

10.1016/j.apcatb.2014.08.019

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：

The synthesis and characterization of ZnAl and ZnGaAl layered double hydroxides and the mixed oxides derived from their calcination is presented. The semiconducting properties of the mixed oxides were analyzed by DR-UV-Vis. It was found that all mixed oxides are semiconductors with band gaps close to that of ZnO. Also, substitution of Al3+ for 5 or 10% wt. of Ga3+ decreases the band gap below that of ZnO, despite the fact that gallium oxide is a wide band gap semiconductor. Then, the photodegrading capabilities of the mixed oxides were tested using phenol, a very recalcitrant compound, as a probe. Nearly 80% of initial 40 ppm and 60% of initial 80 ppm of phenol were degraded in 6 h over ZnAl-3 and ZnGaAl-5% photocatalysts. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：352 / 360

页数：9

共 47 条

[1] Photocatalytic conversion of carbon dioxide into methanol using zinc-copper-M(III) (M = aluminum, gallium) layered double hydroxides [J].