2D Bi2MoO6/Zn3V2O8 heterojunction photocatalyst for efficient photocatalytic reduction of CO2 to CO and CH4

被引：29

作者：

Li, Shiping ^{[1
,2
]}

Hasan, Najmul ^{[1
,2
]}

Zhang, Fuchun ^{[3
]}

Bae, Jong-Seong ^{[4
]}

Liu, Chunli ^{[1
,2
]}

机构：

[1] Hankuk Univ Foreign Studies, Dept Phys, Yongin 17035, South Korea

[2] Hankuk Univ Foreign Studies, Oxide Res Ctr, Yongin 17035, South Korea

[3] Yanan Univ, Coll Phys & Elect Informat, Yanan 716000, Peoples R China

[4] Korea Basic Sci Inst, Busan Ctr, Pusan 46742, South Korea

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2023年 / 652卷

基金：

新加坡国家研究基金会;

关键词：

CO; 2; reduction; DFT; Photocatalysis; Heterojunction; Z-SCHEME PHOTOCATALYST; VISIBLE-LIGHT; PHOTODEGRADATION; NANOSHEETS; H2O;

D O I：

10.1016/j.jcis.2023.08.189

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：

Two-dimensional (2D) "face-to-face" heterojunctions promote interfacial charge transfer and separation in composite photocatalysts. Here, we report an efficient 2D/2D step-scheme (S-scheme) photocatalyst composed of Bi2MoO6/Zn3V2O8 (BMO/ZVO), which has been designed and prepared via the self-assembly of BMO and ZVO nanoflakes. The heterojunction with an optimized composition of 30% BMO/ZVO showed extended light ab-sorption capacity and enhanced separation efficiency of photogenerated carriers. Density functional theory (DFT) calculation on work function and charge density revealed the presence of a built-in electric field at the interface region, which should facilitate the separation of photogenerated electron-hole pairs. This work showed that it is essential to select two photocatalysts with interlaced band arrangement and to fine-tune the heterojunction interface for the preparation of S-scheme heterojunctions to achieve high photocatalytic efficiency.

引用

页码：1533 / 1544

页数：12

共 46 条

[1] Zinc Vanadate (Zn3V2O8) Immobilized Multiwall Carbon Nanotube (MWCNT) Heterojunction as an Efficient Photocatalyst for Visible Light Driven Hydrogen Production [J].