Synthesis of Bi2O3/g-C3N4 for enhanced photocatalytic CO2 reduction with a Z-scheme mechanism

Hao Peng; Rui-Tang Guo; He Lin; Xing-Yu Liu

doi:10.1039/C9RA07485F

Synthesis of Bi₂O₃/g-C₃N₄ for enhanced photocatalytic CO₂ reduction with a Z-scheme mechanism†

Hao Peng,^a Rui-Tang Guo,

*^bcd He Lin*^a and Xing-Yu Liu^bc

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* Corresponding authors

^a School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200240, China
E-mail: linhe@sjtu.edu.cn

^b College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China
E-mail: grta@zju.edu.cn

^c Shanghai Engineering Research Center of Power Generation Environment Protection, Shanghai, P. R. China

^d Shanghai Institute of Pollution Control and Ecological Security, Shanghai, P. R. China

Abstract

Bi₂O₃/g-C₃N₄ nanoscale composites with a Z-scheme mechanism were successfully synthesized by high temperature calcination combined with a hydrothermal method. These synthesized composites exhibited excellent photocatalytic performance, especially the 40 wt% Bi₂O₃/g-C₃N₄ composite, which produced about 1.8 times the CO yield of pure g-C₃N₄. The obtained products were characterized by X-ray diffraction (XRD) patterns, X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and so on. Characterization results revealed that Bi ions had well covered the surface of g-C₃N₄, thus restraining the recombination of electron–hole pairs and resulting in a stronger visible-light response and higher CO yield. In addition, the electron transfer process through the Z-scheme mechanism also promoted the photocatalytic activity.

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DOI: https://doi.org/10.1039/C9RA07485F
Article type: Paper
Submitted: 17 Sep 2019
Accepted: 08 Nov 2019
First published: 13 Nov 2019
This article is Open Access

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RSC Adv., 2019,9, 37162-37170

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Synthesis of Bi₂O₃/g-C₃N₄ for enhanced photocatalytic CO₂ reduction with a Z-scheme mechanism

H. Peng, R. Guo, H. Lin and X. Liu, RSC Adv., 2019, 9, 37162 DOI: 10.1039/C9RA07485F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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Synthesis of Bi₂O₃/g-C₃N₄ for enhanced photocatalytic CO₂ reduction with a Z-scheme mechanism†

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Synthesis of Bi₂O₃/g-C₃N₄ for enhanced photocatalytic CO₂ reduction with a Z-scheme mechanism

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