Role of RGO support and irradiation source on the photocatalytic activity of CdS-ZnO semiconductor nanostructures

被引：45

作者：

Kumar, Suneel ^{[1
,2
]}

Sharma, Rahul ^{[1
,2
,3
]}

Sharma, Vipul ^{[1
,2
]}

Harith, Gurunarayanan ^{[1
,2
]}

Sivakumar, Vaidyanathan ^{[3
]}

Krishnan, Venkata ^{[1
,2
]}

机构：

[1] Indian Inst Technol Mandi, Sch Basic Sci, Mandi 175005, HP, India

[2] Indian Inst Technol Mandi, Adv Mat Res Ctr, Mandi 175005, HP, India

[3] Natl Inst Technol, Dept Chem, Rourkela, Odisha, India

来源：

BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2016年 / 7卷

关键词：

catalytic properties; chemical synthesis; nanostructures; semiconductors; transmission electron microscopy (TEM); REDUCED GRAPHENE OXIDE; HYDROGEN-PRODUCTION; HETEROGENEOUS PHOTOCATALYSIS; EFFICIENT PHOTOCATALYST; COUPLED SEMICONDUCTOR; CHARGE-TRANSFER; METHYLENE-BLUE; GRAPHITE OXIDE; SENSITIZED ZNO; AZO DYES;

D O I：

10.3762/bjnano.7.161

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Photocatalytic activity of semiconductor nanostructures is gaining much importance in recent years in both energy and environmental applications. However, several parameters play a crucial role in enhancing or suppressing the photocatalytic activity through, for example, modifying the band gap energy positions, influencing the generation and transport of charge carriers and altering the recombination rate. In this regard, physical parameters such as the support material and the irradiation source can also have significant effect on the activity of the photocatalysts. In this work, we have investigated the role of reduced graphene oxide (RGO) support and the irradiation source on mixed metal chalcogenide semiconductor (CdS-ZnO) nanostructures. The photocatalyst material was synthesized using a facile hydrothermal method and thoroughly characterized using different spectroscopic and microscopic techniques. The photocatalytic activity was evaluated by studying the degradation of a model dye (methyl orange, MO) under visible light (only) irradiation and under natural sunlight. The results reveal that the RGO-supported CdS-ZnO photocatalyst performs considerably better than the unsupported CdS-ZnO nanostructures. In addition, both the catalysts perform significantly better under natural sunlight than under visible light (only) irradiation. In essence, this work paves way for tailoring the photocatalytic activity of semiconductor nanostructures.

引用

页码：1684 / 1697

页数：14

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