Efficient photocatalytic hydrogen evolution coupled with benzaldehyde production over 0D Cd_(0.5)Zn_(0.5)S/2D Ti_(3)C2 Schottky heterojunction  

作　　者：Junnan TAO Mingyuan WANG Guiwu LIU Qinqin LIU Lei LU Neng WAN Hua TANG Guanjun QIAO 

机构地区：[1]School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China [2]SEU-FEI Nano-Pico Center,Key Laboratory of MEMS of Ministry of Education,School of Electrical Science and Engineering,Southeast University,Nanjing 210096,China [3]School of Environmental Science and Engineering,Qingdao University,Qingdao 266071,China

出　　处：《Journal of Advanced Ceramics》2022年第7期1117-1130,共14页先进陶瓷（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.51902137 and 51672113);the Key Research and Development Plan(Grant No.BE2019094);the Qing Lan Project([2016]15)of Jiangsu Province;The calculations were carried out by the Advanced Computing East China Sub-center and Big Data Center of Southeast University。

摘　　要：Converting water into hydrogen fuel and oxidizing benzyl alcohol to benzaldehyde simultaneously under visible light illumination is of great significance,but the fast recombination of photogenerated carriers in photocatalysts seriously decreases the conversion efficiency.Herein,a novel dual-functional 0D Cd_(0.5)Zn_(0.5)S/2D Ti_(3)C2 hybrid was fabricated by a solvothermally in-situ generated assembling method.The Cd_(0.5)Zn_(0.5)S nano-spheres with a fluffy surface completely and uniformly covered the ultrathin Ti_(3)C2 nanosheets,leading to the increased Schottky barrier(SB)sites due to a large contact area,which could accelerate the electron–hole separation and improve the light utilization.The optimized Cd_(0.5)Zn_(0.5)S/Ti_(3)C2 hybrid simultaneously presents a hydrogen evolution rate of 5.3 mmol/(g·h)and a benzaldehyde production rate of 29.3 mmol/(g·h),which are~3.2 and 2 times higher than those of pristine Cd_(0.5)Zn_(0.5)S,respectively.Both the multiple experimental measurements and the density functional theory(DFT)calculations further demonstrate the tight connection between Cd_(0.5)Zn_(0.5)S and Ti_(3)C2,formation of Schottky junction,and efficient photogenerated electron–hole separation.This paper suggests a dual-functional composite catalyst for photocatalytic hydrogen evolution and benzaldehyde production,and provides a new strategy for preventing the photogenerated electrons and holes from recombining by constructing a 0D/2D heterojunction with increased SB sites.

关 键 词：Cd_(0.5)Zn_(0.5)S Ti_(3)C2 photocatalysis hydrogen BENZALDEHYDE Schottky heterojunction 

分 类 号：O643.3[理学—物理化学]