Visible light photocatalytic degradation of methylene blue by SnO2 quantum dots prepared via microwave-assisted method

Visible light photocatalytic degradation of methylene blue by SnO2 quantum dots prepared via microwave-assisted method

SnO2 quantum dots (QDs) were successfully synthesized via a microwave-assisted reaction of a SnO2 precursor in an aqueous solution using a microwave system. The morphology, structure and photocatalytic performance in the degradation of methylene blue (MB) were characterized by scanning electron micr...

Full description

Saved in:
Bibliographic Details
Main Authors: Liu, Xinjuan, Pan, Likun, Chen, Taiqiang, Li, Jinliang, Yu, Kai, Sun, Zhuo, Sun, Changqing
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2013
Subjects:
DRNTU::Science::Chemistry::Physical chemistry::Catalysis
Online Access:https://hdl.handle.net/10356/101893
http://hdl.handle.net/10220/16924
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
Description
Summary:SnO2 quantum dots (QDs) were successfully synthesized via a microwave-assisted reaction of a SnO2 precursor in an aqueous solution using a microwave system. The morphology, structure and photocatalytic performance in the degradation of methylene blue (MB) were characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, UV-vis absorption/reflectance spectroscopy and electrochemical impedance spectroscopy, respectively. The results show that the SnO2 QDs synthesized at a pH value of 5 exhibit an optimal photocatalytic performance with a MB degradation rate of 90% at 240 min under visible light irradiation due to their easier adsorption of pollutants, higher visible light absorption and lower electron–hole pair recombination.

Similar Items