一锅法制备1T/2H-WS_(2)/WO_(3)异质结用于紫外可见光催化的CO_(2)还原  

One-pot Synthesis of WS_(2)/WO_(3) Heterojunction for UV-Visible-light-driven CO_(2) Reduction to CO

作　　者：杜民兴 孙玉霞 闫长增 李跃辉 DU Min-xing;SUN Yu-xia;YAN Chang-zeng;LI Yue-hui(State Key Laboratory for Oxo Synthesis and Selective Oxidation,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000 [2]中国科学院大学,北京100049

出　　处：《分子催化》2023年第6期523-527,I0001,共6页Journal of Molecular Catalysis(China)

基　　金：The National Natural Science Foundation of China(Nos.21633013 and 22102197);CAS LICP Cooperative Fund of Collaborative Innovation Alliance for Young Scientists(HZJJ23-5).

摘　　要：采用一锅水热法制备了1T/2H-WS_(2)/WO_(3)异质结,并利用XRD、SEM、XPS等对所制备的光催化材料进行了系统微结构表征.研究发现该异质结催化剂可用水蒸汽作为电子供体,利用可见光催化还原CO_(2),以3.87μmol∙g^(−1)∙h^(−1)的速率高选择性地生成唯一产物CO.在紫外-可见光辐照下,表现出更优异的催化活性(34.39μmol∙g^(−1)∙h^(−1)).经4次循环实验,仍然表现出稳定的光催化二氧化碳还原效率,证明其具有优异的稳定性.Photocatalytic reduction of CO_(2)to produce energy-rich hydrocarbons without sacrificing reagents is of great significance.Here,the 1T/2H-WS_(2)/WO_(3)heterojunction catalyst is prepared by one-pot hydrothermal method,which shows a prominent CO_(2)reduction performance with water as an electron donor,affording CO as the sole carbonaceous product at a production rate of 3.87μmol∙g^(-1)∙h^(-1)under visible light.Moreover,under UV-visible light irradiation,the 1T/2H-WS_(2)/WO_(3)photocatalyst shows better catalytic activity and 34.39μmol∙g^(-1)∙h^(-1)yield of CO.Importantly,the stability test shows no distinctive performance degradation even after 64 h reaction.This work provides new insight for designing and fabricating semiconductor heterojunction photocatalysts with high efficiency for solar-energy conversion.

关 键 词：一锅法 WS_(2)/WO_(3)异质结 CO_(2)还原 无牺牲剂 紫外可见光 

分 类 号：O643.32[理学—物理化学]