首页|In-situ generation of Au-carbon-TiO2 Ohmic junction from Ti3C2 MXene for efficient photocatalytic H2 evolution

In-situ generation of Au-carbon-TiO2 Ohmic junction from Ti3C2 MXene for efficient photocatalytic H2 evolution

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Photogenerated charge separation is a challenging step in semiconductor-based photosynthesis.Though numerous efforts have been devoted to developing multi-component photocatalyst heterostructures for improving charge separation efficiency,the short distance between electrons and holes-aggregated re-gions still leads to undesirable charge recombination.Herein,a facile and commercial in-situ synthesis method was designed to directly prepare a three-component Au-carbon-TiO2 photocatalyst from Ti3C2 MXene,air,CO2,and HAuCl4,in which the carbon layer bridged Au and TiO2 nanoparticles for stable and efficient photocatalytic hydrogen production.Kelvin probe measurements and density functional theory(DFT)calculations demonstrated that a multi-interfacial charge transmission network was successfully constructed to achieve a directional and long-distance spatial charge separation/transfer channel between TiO2 and Au through carbon layer,desirably inhibiting the recombination of photogenerated charge car-riers.The hydrogen production rate of the formed three-component Au/C-TiO2(CTA)photocatalyst was demonstrated to be 27 times higher than that of Au-TiO2,which also surpassed many reported Ti3C2 MXene-derived carbon-TiO2 photocatalysts.This work sheds light on the ingenious use of 2D MXene to form a well-behaved TiO2-based photocatalytic system and helps to propose future design principles in accelerating charge transfer.

Photocatalytic hydrogen productionTi3C2 MXeneCarbon layerTiO2Ohmic junction

Huanmin Liu、Chao Wu、Kangle Lv、Dingguo Tang、Qin Li

展开 >

Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science & Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission,South-Central Minzu University,Wuhan 430074,China

National Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities,South-Central MinZu UniversityFundamental Research Funds for the Central Universities,South-Central MinZu UniversityHubei Provincial Natural Science Foundation,ChinaInnovation and Entrepreneurship Training Program Funded by South-Central Minzu University

21972171CZQ23037CZY230182021CFA022S202310524033

2024

10.1016/j.jmst.2023.12.012

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.188(21)
  • 77