Synthesis of TiO2-N/SnO2 heterostructure photocatalyst and its photocatalytic mechanism

Han Cao; Shaolong Huang; Yanlong Yu; Yabin Yan; Yuekai Lv; Yaan Cao

doi:10.1016/j.jcis.2016.09.072

Synthesis of TiO₂-N/SnO₂ heterostructure photocatalyst and its photocatalytic mechanism

J Colloid Interface Sci. 2017 Jan 15:486:176-183. doi: 10.1016/j.jcis.2016.09.072. Epub 2016 Sep 28.

Authors

Han Cao¹, Shaolong Huang², Yanlong Yu³, Yabin Yan⁴, Yuekai Lv⁵, Yaan Cao⁶

Affiliations

¹ College of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, PR China.
² Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China.
³ The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, TEDA Institute of Applied Physics and School of Physics, Nankai University, Tianjin 300457, PR China; Department of Materials Chemistry, College of Chemistry, Nankai University, Tianjin 300071, PR China.
⁴ The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, TEDA Institute of Applied Physics and School of Physics, Nankai University, Tianjin 300457, PR China.
⁵ College of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, PR China. Electronic address: yuekai_lu@sina.com.
⁶ The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, TEDA Institute of Applied Physics and School of Physics, Nankai University, Tianjin 300457, PR China. Electronic address: caoya@nankai.edu.cn.

PMID: 27701015
DOI: 10.1016/j.jcis.2016.09.072

Abstract

A series of TiO₂-N/SnO₂X heterostructure photocatalysts were synthesized by a hydrolysis-deposition method. The structure, existing states of N and SnO₂ heterostructure at the interface of TiO₂-N/SnO₂X were studied by EADX, XRD, Raman, FT-IR, XPS, and HRTEM. The band structure is investigated by both theoretical calculation and experiment characterization. It was found that the introduction of NO_x surface species and SnO₂ nanoparticles would enhance the absorption in visible region, increase reactive oxidative species and separate photogenerated electrons and holes efficiently. Therefore, the photocatalytic activity is improved significantly for TiO₂-N/SnO₂X, compared with TiO₂-N and TiO₂ under visible and UV light irradiation. This work may offer a new strategy to fabricate new photocatalyst with high photocatalytic performance.

Keywords: Heterostructure; SnO(2); TiO(2)-N; Visible response.