Ferroelectric-field accelerated charge transfer in 2D CuInP2S6 heterostructure for enhanced photocatalytic H2 evolution

被引：128

作者：

Lin, Bo ^{[1
]}

Chaturvedi, Apoorva ^{[2
]}

Di, Jun ^{[2
]}

You, Lu ^{[3
]}

Lai, Chen ^{[4
]}

Duan, Ruihuan ^{[2
]}

Zhou, Jiadong ^{[2
]}

Xu, Baorong ^{[4
]}

Chen, Zihao ^{[4
]}

Song, Pin ^{[2
]}

Peng, Juan ^{[2
]}

Ma, Bowen ^{[1
]}

Liu, Haishi ^{[1
]}

Meng, Peng ^{[1
]}

Yang, Guidong ^{[4
]}

Zhang, Hua ^{[5
,6
]}

Liu, Zheng ^{[2
]}

Liu, Fucai ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, Chengdu 610054, Peoples R China

[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[3] Soochow Univ, Sch Phys Sci & Technol, Jiangsu Key Lab Thin Films, Suzhou 215006, Peoples R China

[4] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China

[5] City Univ Hong Kong, Dept Chem, Hong Kong, Peoples R China

[6] City Univ Hong Kong, Hong Kong Branch Natl Precious Met Mat Engn Res C, Hong Kong, Peoples R China

来源：

NANO ENERGY | 2020年 / 76卷 / 76期

基金：

中国博士后科学基金;

关键词：

2D CuInP2S6; Ferroelectric; Polarization electric field; 2D/2D heterojunction; Charge transfer; EFFICIENT PHOTOCATALYST; CARBON NITRIDE; HYDROGEN; WATER; G-C3N4; HETEROJUNCTIONS; COCATALYST; PARAMETERS;

D O I：

10.1016/j.nanoen.2020.104972

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：

The development of ferroelectric photocatalytic materials with polarization electric field is a key approach to realize the spatial separation and fast transfer of charge carriers in visible-light-driven H-2 evolution. Generally, replacing traditional 3D perovskite-type ferroelectric materials with 2D ferroelectric materials is disregarded as candidates for photocatalysis. Herein a 2D CuInP2S6 (CIPS) with room-temperature ferroelectricity (a Curie temperature of around 47 degrees C) is developed as a new photocatalyst, and 2D/2D heterojunction of CuInP2S6 nanosheet/g-C3N4 ultrathin flake (CIPS/CN) is constructed to further accelerate charge transfer. Benefitting from the synergetic action of the inner polarization electric field of CIPS and 2D/2D heterojunction, CIPS/CN displays a substantially accelerated charge transfer and significantly enhanced photocatalytic H-2 evolution rate, which is up to 7.6 times by contrast with that of paraelectric-phase CIPS. This work would provide a new platform for the design of 2D ferroelectric photocatalytic system with highly-efficient charge transfer.

引用

页数：9

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