Photocatalytic CO2 reduction over B4C/C3N4 with internal electric field under visible light irradiation

Xiaojie Zhang; Lei Wang; Quanchao Du; Zhiyong Wang; Shuguo Ma; Miao Yu

doi:10.1016/j.jcis.2015.11.022

Photocatalytic CO₂ reduction over B₄C/C₃N₄ with internal electric field under visible light irradiation

Xiaojie Zhang
, Lei Wang
, Quanchao Du
, Zhiyong Wang
, Shuguo Ma
, Miao Yu

Department of Chemical and Biological Engineering

University at Buffalo

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

Boron carbide/graphitic carbon nitride (B₄C/g-C₃N₄) p-n hetero-junction photocatalyst with an internal electric field was synthesized by a facile solvent evaporation method and characterized by field emission scanning electron microscope (FESEM), UV-Vis diffuse reflectance spectra (UV-Vis DRS), photoluminescence spectra (PL), etc. Photocatalytic activity of the composite B₄C/g-C₃N₄ loaded with Pt co-catalyst was evaluated using CO₂ conversion to CH₄ with H₂ as the hydrogen source and reductant under visible light irradiation. The coupling of p-type B₄C with n-type g-C₃N₄ significantly improved the performance of photocatalytic CO₂ reduction; with the optimum B₄C mass fraction of 1/6, the composite photocatalyst showed approximately 6 and 8 times higher CH₄ generation rate than g-C₃N₄ and B₄C, respectively. The enhancement was attributed to efficient photo-excited electron/hole separation due to the formation of internal electric field at the p-B₄C/n-C₃N₄ interface.

Original language	English
Pages (from-to)	89-95
Number of pages	7
Journal	Journal of Colloid and Interface Science
Volume	464
DOIs	https://doi.org/10.1016/j.jcis.2015.11.022
State	Published - Feb 15 2016

Keywords

BC
CO reduction
Visible light
g-CN
p-n heterojunction

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10.1016/j.jcis.2015.11.022

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@article{8fefc7bfe97a440a950cc8589b5709f6,

title = "Photocatalytic CO2 reduction over B4C/C3N4 with internal electric field under visible light irradiation",

abstract = "Boron carbide/graphitic carbon nitride (B4C/g-C3N4) p-n hetero-junction photocatalyst with an internal electric field was synthesized by a facile solvent evaporation method and characterized by field emission scanning electron microscope (FESEM), UV-Vis diffuse reflectance spectra (UV-Vis DRS), photoluminescence spectra (PL), etc. Photocatalytic activity of the composite B4C/g-C3N4 loaded with Pt co-catalyst was evaluated using CO2 conversion to CH4 with H2 as the hydrogen source and reductant under visible light irradiation. The coupling of p-type B4C with n-type g-C3N4 significantly improved the performance of photocatalytic CO2 reduction; with the optimum B4C mass fraction of 1/6, the composite photocatalyst showed approximately 6 and 8 times higher CH4 generation rate than g-C3N4 and B4C, respectively. The enhancement was attributed to efficient photo-excited electron/hole separation due to the formation of internal electric field at the p-B4C/n-C3N4 interface.",

keywords = "BC, CO reduction, Visible light, g-CN, p-n heterojunction",

author = "Xiaojie Zhang and Lei Wang and Quanchao Du and Zhiyong Wang and Shuguo Ma and Miao Yu",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Inc.",

year = "2016",

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day = "15",

doi = "10.1016/j.jcis.2015.11.022",

language = "English",

volume = "464",

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T1 - Photocatalytic CO2 reduction over B4C/C3N4 with internal electric field under visible light irradiation

AU - Zhang, Xiaojie

AU - Wang, Lei

AU - Du, Quanchao

AU - Wang, Zhiyong

AU - Ma, Shuguo

AU - Yu, Miao

PY - 2016/2/15

Y1 - 2016/2/15

N2 - Boron carbide/graphitic carbon nitride (B4C/g-C3N4) p-n hetero-junction photocatalyst with an internal electric field was synthesized by a facile solvent evaporation method and characterized by field emission scanning electron microscope (FESEM), UV-Vis diffuse reflectance spectra (UV-Vis DRS), photoluminescence spectra (PL), etc. Photocatalytic activity of the composite B4C/g-C3N4 loaded with Pt co-catalyst was evaluated using CO2 conversion to CH4 with H2 as the hydrogen source and reductant under visible light irradiation. The coupling of p-type B4C with n-type g-C3N4 significantly improved the performance of photocatalytic CO2 reduction; with the optimum B4C mass fraction of 1/6, the composite photocatalyst showed approximately 6 and 8 times higher CH4 generation rate than g-C3N4 and B4C, respectively. The enhancement was attributed to efficient photo-excited electron/hole separation due to the formation of internal electric field at the p-B4C/n-C3N4 interface.

AB - Boron carbide/graphitic carbon nitride (B4C/g-C3N4) p-n hetero-junction photocatalyst with an internal electric field was synthesized by a facile solvent evaporation method and characterized by field emission scanning electron microscope (FESEM), UV-Vis diffuse reflectance spectra (UV-Vis DRS), photoluminescence spectra (PL), etc. Photocatalytic activity of the composite B4C/g-C3N4 loaded with Pt co-catalyst was evaluated using CO2 conversion to CH4 with H2 as the hydrogen source and reductant under visible light irradiation. The coupling of p-type B4C with n-type g-C3N4 significantly improved the performance of photocatalytic CO2 reduction; with the optimum B4C mass fraction of 1/6, the composite photocatalyst showed approximately 6 and 8 times higher CH4 generation rate than g-C3N4 and B4C, respectively. The enhancement was attributed to efficient photo-excited electron/hole separation due to the formation of internal electric field at the p-B4C/n-C3N4 interface.

KW - BC

KW - CO reduction

KW - Visible light

KW - g-CN

KW - p-n heterojunction

UR - https://www.scopus.com/pages/publications/84947772359

U2 - 10.1016/j.jcis.2015.11.022

DO - 10.1016/j.jcis.2015.11.022

M3 - Article

SN - 0021-9797

VL - 464

SP - 89

EP - 95

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

Photocatalytic CO₂ reduction over B₄C/C₃N₄ with internal electric field under visible light irradiation

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Keywords

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