Synthesis of g-C3N4/BiOClxBr1-x hybrid photocatalysts and the photoactivity enhancement driven by visible light

Shan Shi; M. A. Gondal; S. G. Rashid; Qi Qi; A. A. Al-Saadi; Z. H. Yamani; Yihe Sui; Qingyu Xu; Kai Shen

doi:10.1016/j.colsurfa.2014.07.024

Synthesis of g-C₃N₄/BiOCl_xBr_1-x hybrid photocatalysts and the photoactivity enhancement driven by visible light

Shan Shi
, M. A. Gondal^*
, S. G. Rashid
, Qi Qi
, A. A. Al-Saadi
, Z. H. Yamani
, Yihe Sui
, Qingyu Xu
, Kai Shen

^*Corresponding author for this work

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

53 Scopus citations

Abstract

In the current investigation, we report a facile preparation of a series of novel g-C₃N₄/BiOCl_xBr_1-x hybrid photocatalysts and their enhanced photoactivity under visible light irradiation. The physicochemical and optical absorption of as-prepared g-C₃N₄/BiOCl_xBr_1-x were characterized by means of X-ray diffraction (XRD), filed-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR) and UV-vis diffuse reflection spectroscopy (DRS). A substantial decrease in photoluminance (PL) intensity of as-prepared hybrid photocatalyst compared to g-C₃N₄ is because of carries transfer between g-C₃N₄ and BiOCl_xBr_1-x solid solution. The florescence lifetimes of g-C₃N₄ and the corresponding hybrid photocatalyst were measured using time correlated single photon counting (TCSPC) as well. Both DFT calculations and Mulliken electronegativity method were employed to calculate band edges in BiOCl_xBr_1-x solid solutions. The high carries separation efficiency at the interface, between g-C₃N₄ and BiOCl_xBr_1-x, of the hybrid photocatalyst renders g-C₃N₄/BiOCl_xBr_1-x highly photocatalytically active. The hybrid catalyst showed excellent stability and efficiency even after many runs of photodegradation experiments.

Original language	English
Pages (from-to)	202-211
Number of pages	10
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	461
Issue number	1
DOIs	https://doi.org/10.1016/j.colsurfa.2014.07.024
State	Published - 5 Nov 2014

Bibliographical note

Funding Information:
The support under the projects of National Natural Science Foundation of China (51172044), National Science Foundation of Jiangsu Province of China (BK2011617) and the 333 project of Jiangsu province is highly appreciated. This work is also supported by the # R15-CW-11 (MIT11109& MIT11110) by KFUPM.

Keywords

Density functional theory (DFT)
Frontier orbital energy
Gaussian 03
Hybrid photocatalyst

ASJC Scopus subject areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

Access to Document

10.1016/j.colsurfa.2014.07.024

Cite this

@article{88732fa59e9246aa9d8bf8d9915dfd97,

title = "Synthesis of g-C3N4/BiOClxBr1-x hybrid photocatalysts and the photoactivity enhancement driven by visible light",

abstract = "In the current investigation, we report a facile preparation of a series of novel g-C3N4/BiOClxBr1-x hybrid photocatalysts and their enhanced photoactivity under visible light irradiation. The physicochemical and optical absorption of as-prepared g-C3N4/BiOClxBr1-x were characterized by means of X-ray diffraction (XRD), filed-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR) and UV-vis diffuse reflection spectroscopy (DRS). A substantial decrease in photoluminance (PL) intensity of as-prepared hybrid photocatalyst compared to g-C3N4 is because of carries transfer between g-C3N4 and BiOClxBr1-x solid solution. The florescence lifetimes of g-C3N4 and the corresponding hybrid photocatalyst were measured using time correlated single photon counting (TCSPC) as well. Both DFT calculations and Mulliken electronegativity method were employed to calculate band edges in BiOClxBr1-x solid solutions. The high carries separation efficiency at the interface, between g-C3N4 and BiOClxBr1-x, of the hybrid photocatalyst renders g-C3N4/BiOClxBr1-x highly photocatalytically active. The hybrid catalyst showed excellent stability and efficiency even after many runs of photodegradation experiments.",

keywords = "Density functional theory (DFT), Frontier orbital energy, Gaussian 03, Hybrid photocatalyst",

author = "Shan Shi and Gondal, \{M. A.\} and Rashid, \{S. G.\} and Qi Qi and Al-Saadi, \{A. A.\} and Yamani, \{Z. H.\} and Yihe Sui and Qingyu Xu and Kai Shen",

note = "Funding Information: The support under the projects of National Natural Science Foundation of China (51172044), National Science Foundation of Jiangsu Province of China (BK2011617) and the 333 project of Jiangsu province is highly appreciated. This work is also supported by the \# R15-CW-11 (MIT11109\& MIT11110) by KFUPM. ",

year = "2014",

month = nov,

day = "5",

doi = "10.1016/j.colsurfa.2014.07.024",

language = "English",

volume = "461",

pages = "202--211",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Synthesis of g-C3N4/BiOClxBr1-x hybrid photocatalysts and the photoactivity enhancement driven by visible light

AU - Shi, Shan

AU - Gondal, M. A.

AU - Rashid, S. G.

AU - Qi, Qi

AU - Al-Saadi, A. A.

AU - Yamani, Z. H.

AU - Sui, Yihe

AU - Xu, Qingyu

AU - Shen, Kai

N1 - Funding Information: The support under the projects of National Natural Science Foundation of China (51172044), National Science Foundation of Jiangsu Province of China (BK2011617) and the 333 project of Jiangsu province is highly appreciated. This work is also supported by the # R15-CW-11 (MIT11109& MIT11110) by KFUPM.

PY - 2014/11/5

Y1 - 2014/11/5

N2 - In the current investigation, we report a facile preparation of a series of novel g-C3N4/BiOClxBr1-x hybrid photocatalysts and their enhanced photoactivity under visible light irradiation. The physicochemical and optical absorption of as-prepared g-C3N4/BiOClxBr1-x were characterized by means of X-ray diffraction (XRD), filed-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR) and UV-vis diffuse reflection spectroscopy (DRS). A substantial decrease in photoluminance (PL) intensity of as-prepared hybrid photocatalyst compared to g-C3N4 is because of carries transfer between g-C3N4 and BiOClxBr1-x solid solution. The florescence lifetimes of g-C3N4 and the corresponding hybrid photocatalyst were measured using time correlated single photon counting (TCSPC) as well. Both DFT calculations and Mulliken electronegativity method were employed to calculate band edges in BiOClxBr1-x solid solutions. The high carries separation efficiency at the interface, between g-C3N4 and BiOClxBr1-x, of the hybrid photocatalyst renders g-C3N4/BiOClxBr1-x highly photocatalytically active. The hybrid catalyst showed excellent stability and efficiency even after many runs of photodegradation experiments.

AB - In the current investigation, we report a facile preparation of a series of novel g-C3N4/BiOClxBr1-x hybrid photocatalysts and their enhanced photoactivity under visible light irradiation. The physicochemical and optical absorption of as-prepared g-C3N4/BiOClxBr1-x were characterized by means of X-ray diffraction (XRD), filed-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FT-IR) and UV-vis diffuse reflection spectroscopy (DRS). A substantial decrease in photoluminance (PL) intensity of as-prepared hybrid photocatalyst compared to g-C3N4 is because of carries transfer between g-C3N4 and BiOClxBr1-x solid solution. The florescence lifetimes of g-C3N4 and the corresponding hybrid photocatalyst were measured using time correlated single photon counting (TCSPC) as well. Both DFT calculations and Mulliken electronegativity method were employed to calculate band edges in BiOClxBr1-x solid solutions. The high carries separation efficiency at the interface, between g-C3N4 and BiOClxBr1-x, of the hybrid photocatalyst renders g-C3N4/BiOClxBr1-x highly photocatalytically active. The hybrid catalyst showed excellent stability and efficiency even after many runs of photodegradation experiments.

KW - Density functional theory (DFT)

KW - Frontier orbital energy

KW - Gaussian 03

KW - Hybrid photocatalyst

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U2 - 10.1016/j.colsurfa.2014.07.024

DO - 10.1016/j.colsurfa.2014.07.024

M3 - Article

AN - SCOPUS:84906492244

SN - 0927-7757

VL - 461

SP - 202

EP - 211

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - 1

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