Cu-石墨炔/双金属钨酸盐S型异质结协同增强光催化析氢
Synergistic Effect of Cu-Graphdiyne/Transition Bimetallic Tungstate Formed S-Scheme Heterojunction for Enhanced Photocatalytic Hydrogen Evolution
周正宇 1姚惠琴 2吴有林 1李腾 3椿范立 4靳治良1
作者信息
- 1. 北方民族大学化学与化学工程学院,银川 750021
- 2. 宁夏医科大学基础医学院化学系,银川 750004
- 3. 北方民族大学化学与化学工程学院,银川 750021;Department of Applied Chemistry,Graduate School of Engineering,University of Toyama,Gofuku 3190,Toyama 930-8555,Japan
- 4. Department of Applied Chemistry,Graduate School of Engineering,University of Toyama,Gofuku 3190,Toyama 930-8555,Japan
- 折叠
摘要
采用有机法和水热法合成了Cu-石墨炔和CoNiWO4并构建Cu-石墨炔/CoNiWO4 S型异质结.在保留催化剂强氧化还原能力的同时,通过内建电场和能带弯曲的协同作用促进了光生载流子的高效分离和转移.Cu-石墨炔的引入有效提高了复合催化剂的光吸收能力和导电性,抑制了光生载流子的复合.同时,Cu-石墨炔独特的二维平面网络结构提供了丰富的活性位点,从而促进了光催化反应的进行.密度泛函理论(DFT)计算表明,Cu的表面等离子体共振效应产生的热电子转移到石墨炔上,促进氢气的析出.本研究为Cu-石墨炔和镍钴基催化剂在光催化制氢领域提供了新的参考.
Abstract
Cu-Graphdiyne and CoNiWO4 were synthesized by organic and hydrothermal methods,respectively.The establishment of an S-scheme heterojunction between Cu-Graphdiyne and CoNiWO4 was achieved by interface engineering design.The efficient separation and transfer of photogenerated carriers are facilitated by the synergistic effect of the built-in electric field and band bending,while maintaining the strong redox capacity of the catalysts.The introduction of Cu-Graphdiyne effectively enhances the photo absorption capacity and conductivity of the composite catalyst,and significantly suppresses the recombination of photogenerated carriers.The unique two-dimensional planar network structure of Cu-Graphdiyne provides abundant active sites for photocatalytic processes,thereby facilitating the photocatalytic reaction.Density functional theory(DFT)calculations demonstrate that hot electrons generated by surface plasmon resonance effects of Cu will transfer to Graphdiyne to promote hydrogen evolution reaction.This study offers insights into potential applications of Cu-Graphdiyne and nickel-cobalt based catalysts in photocatalytic hydrogen evolution.
关键词
Cu-石墨炔/S-型异质结/界面工程设计/析氢反应/DFTKey words
Cu-graphdiyne/S-scheme heterojunction/Interface engineering design/Hydrogen evolution reaction/DFT引用本文复制引用
基金项目
宁夏回族自治区自然科学基金(2023AAC02046)
出版年
2024
国家科技期刊平台
NSTL
万方数据