Enhanced Daylight-Induced Photocatalytic Activity of Solvent Exfoliated Graphene (SEG)/ZnO Hybrid Nanocomposites toward Degradation of Reactive Black 5

被引：84

作者：

Ong, Wee-Jun ^{[1
]}

Voon, Seen-Yee ^{[1
]}

Tan, Lling-Lling ^{[1
]}

Goh, Boon Tong ^{[2
]}

Yong, Siek-Ting ^{[1
]}

Chai, Siang-Piao ^{[1
]}

机构：

[1] Monash Univ, Sch Engn, Chem Engn Discipline, Multidisciplinary Platform Adv Engn, Bandar Sunway 47500, Selangor, Malaysia

[2] Univ Malaya, Fac Sci, Dept Phys, Low Dimens Mat Res Ctr, Kuala Lumpur 50603, Malaysia

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2014年 / 53卷 / 44期

关键词：

AZO DYES; PHOTOCORROSION INHIBITION; IMPROVED PHOTOACTIVITY; ZNO NANOCRYSTALS; AQUEOUS-SOLUTION; METHYLENE-BLUE; ZINC-OXIDE; 001; FACETS; COMPOSITES; TIO2;

D O I：

10.1021/ie5027088

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A series of SEG/ZnO photocatalysts with different ratios of Zn(NO3)(2) precursor was synthesized via a facile chemical deposition-calcination approach using solvent exfoliated graphene (SEG) as a precursor of graphene, Zn(NH3)(4)CO3 as a precursor of ZnO, NaOH as a precipitating agent, and poly(vinylpyrrolidone) as an interface linker. The photocatalytic activity and stability of SEG/ZnO were evaluated by the degradation of Reactive Black 5 (RB5) under visible light. In comparison to pure SEG and ZnO, SEG/ZnO nanocomposites displayed a remarkable RB5 degradation of 97.0% with a rate constant of 0.0199 min1 under a low-power 15 W energy-saving light bulb for 3 h. The optimum ZnO content was 69.0 wt %, which demonstrated a 10-fold enhancement after graphene hybridization than that for pure ZnO. This was accredited to effective dye sensitization and suppressed electronhole recombination via SEG as electron storage. Lastly, a visible-light photocatalytic mechanism for the photoactivity was explored.

引用

页码：17333 / 17344

页数：12

共 59 条

[1] The long game [J].