Oxygen vacancies and interfacial electric field co-induced photocatalytic performance of OVs-BiOI/α-Bi2O3 heterojunctions

被引：28

作者：

Chen, Jiufu ^{[1
]}

Qiu, Kehui ^{[1
]}

机构：

[1] Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2021年 / 615卷

关键词：

BiOI/alpha-Bi2O3; heterojunctions; Photocatalytic degradation; The synergistic effect; Oxygen vacancies; Interfacial electric field; P-N-JUNCTION; SCHEME HETEROJUNCTION; MULTI-HETEROJUNCTION; METALLIC BI; DEGRADATION; FABRICATION; POLLUTANTS; PHOTODEGRADATION; NANOPARTICLES; ABSORPTION;

D O I：

10.1016/j.colsurfa.2021.126262

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Oxygen vacancies (OVs), as intrinsic defects and active sites in semiconductors, can trap electrons and activate O-2 under light irradiation, effectively restraining the recombination of photogenerated carriers. The interfacial electric field of heterojunctions can also guide the photoexcited carriers to separate purposefully. However, the relationship between OVs and interfacial electric field needs to be further unrevealed. In this contribution, OVs-BiOI/alpha-Bi2O3 p-n heterojunctions with excellent photocatalytic performance were successfully in-situ constructed by a solid-liquid reaction. The low-temperature electron paramagnetic resonance (EPR) confirms that this method can introduce abundant OVs into OVs-BiOI/alpha-Bi2O3 heterojunctions. Moreover, the theoretical calculations powerfully reveal that an interfacial electric field has been built in the interface of BiOI and alpha-Bi2O3. The photocatalytic efficiency of OVs-BiOI/alpha-Bi2O3 heterostructures was also tested by the destruction of tetracycline (TC) and methyl orange (MO) under simulated sunlight illumination. OVs-BiOI/alpha-Bi2O3 sample with 3% molar fraction of I/Bi has the best photocatalytic performance, deriving from higher specific surface area and the synergic effect between OVs and interfacial electric field. This work can shed light on elaborating the synergistic action of OVs and the interfacial electric field for improved photocatalytic performance.

引用

页数：12

共 65 条

[1] PROJECTOR AUGMENTED-WAVE METHOD [J].

BLOCHL, PE .

PHYSICAL REVIEW B, 1994, 50 (24) :17953-17979

[2] A nanosheet-like α-Bi2O3/g-C3N4 heterostructure modified by plasmonic metallic Bi and oxygen vacancies with high photodegradation activity of organic pollutants [J].

Chen, Dongdong ;

Wu, Shuxing ;

Fang, Jianzhang ;

Lu, Shaoyou ;

Zhou, GuangYing ;

Feng, Weihua ;

Yang, Fan ;

Chen, Yi ;

Fang, ZhanQiang .

SEPARATION AND PURIFICATION TECHNOLOGY, 2018, 193 :232-241

[3] In situ construction of biocompatible Z-scheme α-Bi2O3/CuBi2O4 heterojunction for NO removal under visible light [J].

Chen, Qian ;

Long, Huimin ;

Chen, Meijuan ;

Rao, Yongfang ;

Li, Xinwei ;

Huang, Yu .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2020, 272

[4] Oxygen vacancy associated single-electron transfer for photofixation of CO2 to long-chain chemicals [J].

Chen, Shichuan ;

Wang, Hui ;

Kang, Zhixiong ;

Jin, Sen ;

Zhang, Xiaodong ;

Zheng, Xusheng ;

Qi, Zeming ;

Zhu, Junfa ;

Pan, Bicai ;

Xie, Yi .

NATURE COMMUNICATIONS, 2019, 10 (1)

[5] Fabrication of 3D Bi2O3-BiOI heterojunction by a simple dipping method: Highly enhanced visible-light photoelectrocatalytic activity [J].

Cong, Yanqing ;

Ji, Yun ;

Ge, Yaohua ;

Jin, Huan ;

Zhang, Yi ;

Wang, Qi .

CHEMICAL ENGINEERING JOURNAL, 2017, 307 :572-582

[6] Photocatalytic degradation and toxicity reduction of isoniazid using β-Bi2O3 in real wastewater [J].

Coronado-Castaneda, R. R. S. ;

Maya-Trevino, M. L. ;

Garza-Gonzalez, E. ;

Peral, J. ;

Villanueva-Rodriguez, M. ;

Hernandez-Ramirez, A. .

CATALYSIS TODAY, 2020, 341 :82-89

[7] Defect Physics of BiOI as High Efficient Photocatalyst Driven by Visible Light [J].

Dai, Wen-Wu ;

Zhao, Zong-Yan .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2016, 99 (09) :3015-3024

[8] One-pot solvothermal fabrication of S-scheme OVs-Bi2O3/Bi2SiO5 microsphere heterojunctions with enhanced photocatalytic performance toward decontamination of organic pollutants [J].

Dou, Lin ;

Jin, Xingyun ;

Chen, Jiufu ;

Zhong, Junbo ;

Li, Jianzhang ;

Zeng, Ying ;

Duan, Ran .

APPLIED SURFACE SCIENCE, 2020, 527

[9] Photocatalytic nitrogen fixation: Oxygen vacancy modified novel micro-nanosheet structure Bi2O2CO3 with band gap engineering [J].

Feng, Yalan ;

Zhang, Zisheng ;

Zhao, Kai ;

Lin, Shuanglong ;

Li, Hong ;

Gao, Xin .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2021, 583 :499-509

[10] Controlled synthesis of bismuth-containing compounds (α-, β- and δ-Bi2O3, Bi5O7NO3 and Bi6O6(OH)2(NO3)4•2H2O) and their photocatalytic performance [J].

Gong, Shu ;

Han, Qiaofeng ;

Wang, Xin ;

Zhu, Junwu .

CRYSTENGCOMM, 2015, 17 (47) :9185-9192

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