Photocatalytic properties of semiconductor SnO2/CdS heterostructure nanocrystals

被引：70

作者：

Kar, Arik ^{[1
]}

Kundu, Simanta ^{[1
]}

Patra, Amitava ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India

来源：

RSC ADVANCES | 2012年 / 2卷 / 27期

关键词：

CORE-SHELL; QUANTUM DOTS; SONOCHEMICAL SYNTHESIS; ELECTRICAL-PROPERTIES; CDS; NANOPARTICLES; DYNAMICS; NANORODS; BEHAVIOR; FILMS;

D O I：

10.1039/c2ra21065g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Here we report the photocatalytic properties of semiconductor SnO2/CdS heterostructure nanocrystals. A type-II SnO2/CdS heterostructure has been synthesized from a single-source precursor and its structure was determined using XRD, HRTEM, elemental mapping and line scan EDAX analysis. A time resolved spectroscopic study revealed the effective charge separation in this heterostructure and the mechanism of charge separation was proposed using a schematic model. It is important to mention that the conductivity was found to be lower in the SnO2/CdS heterostructure compared to uncoated SnO2 nanorods due to efficient charge separation. The efficient charge separation in the SnO2/CdS heterostructure revealed its higher photocatalytic activity and the photocatalytic degradation of Congo red dye was found to be 97% and 20% for the SnO2/CdS heterostructure and SnO2 respectively under UV light irradiation.

引用

页码：10222 / 10230

页数：9

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