Carbon quantum dot (CQD)-modified Bi3O4Br nanosheets possessing excellent photocatalytic activity under simulated sunlight

Xiameng Huang; Haitao Zhang; Jianquan Zhao; Dongmei Jiang; Qingfeng Zhan

doi:10.1016/j.mssp.2020.105489

Carbon quantum dot (CQD)-modified Bi₃O₄Br nanosheets possessing excellent photocatalytic activity under simulated sunlight

Xiameng Huang
, Haitao Zhang
, Jianquan Zhao
, Dongmei Jiang^*
, Qingfeng Zhan

^*Corresponding author for this work

East China Normal University

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

45 Scopus citations

Abstract

Carbon quantum dots (CQDs) modified Bi₃O₄Br (CQDs/Bi₃O₄Br) nanosheets were successfully synthesized through a mild hydrothermal method for the first time. Compared with traditional photocatalysts Degussa P25 and g-C₃N₄, the CQDs/Bi₃O₄Br composites exhibited better photocatalytic activity in degrading rhodamine B (RhB) under simulated sunlight, and the degradation rate of the composites could be increased by up to 4 times compared with the pure Bi₃O₄Br. In addition, the CQDs/Bi₃O₄Br composites also presented higher photocatalytic properties in degrading tetracycline hydrochloride (TC) and bisphenol A (BPA). The activity enhancement was attributed to the heterojunction structure formed by Bi₃O₄Br and CQDs, which could effectively separate photogenerated carriers. Two major active species, holes (h⁺) and superoxide radicals (•O₂⁻), were found in the process of photocatalysis. This work may provide a novel method for the environmentally friendly preparation of photocatalysts to remedy freshwater pollution.

Original language	English
Article number	105489
Journal	Materials Science in Semiconductor Processing
Volume	122
DOIs	https://doi.org/10.1016/j.mssp.2020.105489
State	Published - Feb 2021
Externally published	Yes

Keywords

CQDs/BiOBr Composites
Carbon quantum dots (CQDs)
Photocatalysis
Photodegradation

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10.1016/j.mssp.2020.105489

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@article{f68453f57d36484aacccec3f1c516d8b,

title = "Carbon quantum dot (CQD)-modified Bi3O4Br nanosheets possessing excellent photocatalytic activity under simulated sunlight",

abstract = "Carbon quantum dots (CQDs) modified Bi3O4Br (CQDs/Bi3O4Br) nanosheets were successfully synthesized through a mild hydrothermal method for the first time. Compared with traditional photocatalysts Degussa P25 and g-C3N4, the CQDs/Bi3O4Br composites exhibited better photocatalytic activity in degrading rhodamine B (RhB) under simulated sunlight, and the degradation rate of the composites could be increased by up to 4 times compared with the pure Bi3O4Br. In addition, the CQDs/Bi3O4Br composites also presented higher photocatalytic properties in degrading tetracycline hydrochloride (TC) and bisphenol A (BPA). The activity enhancement was attributed to the heterojunction structure formed by Bi3O4Br and CQDs, which could effectively separate photogenerated carriers. Two major active species, holes (h+) and superoxide radicals (•O2−), were found in the process of photocatalysis. This work may provide a novel method for the environmentally friendly preparation of photocatalysts to remedy freshwater pollution.",

keywords = "CQDs/BiOBr Composites, Carbon quantum dots (CQDs), Photocatalysis, Photodegradation",

author = "Xiameng Huang and Haitao Zhang and Jianquan Zhao and Dongmei Jiang and Qingfeng Zhan",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2021",

month = feb,

doi = "10.1016/j.mssp.2020.105489",

language = "英语",

volume = "122",

journal = "Materials Science in Semiconductor Processing",

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TY - JOUR

T1 - Carbon quantum dot (CQD)-modified Bi3O4Br nanosheets possessing excellent photocatalytic activity under simulated sunlight

AU - Huang, Xiameng

AU - Zhang, Haitao

AU - Zhao, Jianquan

AU - Jiang, Dongmei

AU - Zhan, Qingfeng

PY - 2021/2

Y1 - 2021/2

N2 - Carbon quantum dots (CQDs) modified Bi3O4Br (CQDs/Bi3O4Br) nanosheets were successfully synthesized through a mild hydrothermal method for the first time. Compared with traditional photocatalysts Degussa P25 and g-C3N4, the CQDs/Bi3O4Br composites exhibited better photocatalytic activity in degrading rhodamine B (RhB) under simulated sunlight, and the degradation rate of the composites could be increased by up to 4 times compared with the pure Bi3O4Br. In addition, the CQDs/Bi3O4Br composites also presented higher photocatalytic properties in degrading tetracycline hydrochloride (TC) and bisphenol A (BPA). The activity enhancement was attributed to the heterojunction structure formed by Bi3O4Br and CQDs, which could effectively separate photogenerated carriers. Two major active species, holes (h+) and superoxide radicals (•O2−), were found in the process of photocatalysis. This work may provide a novel method for the environmentally friendly preparation of photocatalysts to remedy freshwater pollution.

AB - Carbon quantum dots (CQDs) modified Bi3O4Br (CQDs/Bi3O4Br) nanosheets were successfully synthesized through a mild hydrothermal method for the first time. Compared with traditional photocatalysts Degussa P25 and g-C3N4, the CQDs/Bi3O4Br composites exhibited better photocatalytic activity in degrading rhodamine B (RhB) under simulated sunlight, and the degradation rate of the composites could be increased by up to 4 times compared with the pure Bi3O4Br. In addition, the CQDs/Bi3O4Br composites also presented higher photocatalytic properties in degrading tetracycline hydrochloride (TC) and bisphenol A (BPA). The activity enhancement was attributed to the heterojunction structure formed by Bi3O4Br and CQDs, which could effectively separate photogenerated carriers. Two major active species, holes (h+) and superoxide radicals (•O2−), were found in the process of photocatalysis. This work may provide a novel method for the environmentally friendly preparation of photocatalysts to remedy freshwater pollution.

KW - CQDs/BiOBr Composites

KW - Carbon quantum dots (CQDs)

KW - Photocatalysis

KW - Photodegradation

UR - https://www.scopus.com/pages/publications/85092484031

U2 - 10.1016/j.mssp.2020.105489

DO - 10.1016/j.mssp.2020.105489

M3 - 文章

AN - SCOPUS:85092484031

SN - 1369-8001

VL - 122

JO - Materials Science in Semiconductor Processing

JF - Materials Science in Semiconductor Processing

M1 - 105489

ER -

Carbon quantum dot (CQD)-modified Bi₃O₄Br nanosheets possessing excellent photocatalytic activity under simulated sunlight

Abstract

Keywords

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