Facile One-Step Hydrothermal Fabrication of (Sr0.6Bi0.305)2Bi2O7/SnO2 Heterojunction with Excellent Photocatalytic Activity

Di Zhu; Xinling Wang; Huiting An; Yan Zhong; Dianhui Wang; Chengying Tang; Chaohao Hu

doi:10.3390/nano10020321

Nanomaterials (Feb 2020)

Facile One-Step Hydrothermal Fabrication of (Sr0.6Bi0.305)2Bi2O7/SnO2 Heterojunction with Excellent Photocatalytic Activity

Di Zhu,
Xinling Wang,
Huiting An,
Yan Zhong,
Dianhui Wang,
Chengying Tang,
Chaohao Hu

Affiliations

Di Zhu: School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Xinling Wang: School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Huiting An: School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Yan Zhong: School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Dianhui Wang: School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Chengying Tang: School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Chaohao Hu: School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China

DOI: https://doi.org/10.3390/nano10020321
Journal volume & issue: Vol. 10, no. 2
p. 321

Abstract

Read online

The pyrochlore-type (Sr0.6Bi0.305)2Bi2O7 (SBO), containing Bi3+ and Bi5+ mixed valent states, was recently found to be used as a new visible light responsive photocatalyst. Novel SBO/SnO2 heterostructured composites were synthesized through a facile one-step hydrothermal method. The phase structure, morphology, chemical composition, and optical properties of the obtained samples were characterized by XRD, SEM, TEM, XPS, and UV-vis DRS. Compared to pure SBO and SnO2, the synthesized SBO/SnO2 composites exhibited significantly enhanced photocatalytic efficiency. The results indicated that the photoinduced holes and superoxide radicals play a dominant role and are the main reactive species during the degradation of Methylene Blue (MB) solution under visible light irradiation. Heterojunctions, formed in samples, directly contribute to the improvement of photocatalytic efficiency of SBO/SnO2 composites, since it not only broadens the light response range, but also accelerates the separation of photogenerated carriers.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

About the journal

Abstract

Keywords