M_(x)Co_(3)O_(4)/g-C_(3)N_(4) Derived from Bimetallic MOFs/g-C_(3)N_(4) Composites for Styrene Epoxidation by Synergistic Photothermal Catalysis  

作　　者：REN Fengdi GAO Qiqin CHEN Yuzhen 

机构地区：[1]Department of Chemistry,College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,P.R.China [2]Dongming Country Second Junior Middle School,Heze 274500,P.R.China

出　　处：《Chemical Research in Chinese Universities》2022年第6期1361-1367,共7页高等学校化学研究（英文版）

基　　金：supported by the Excellent Youth Foundation of Shandong Natural Science Foundation,China (No.ZR2020YQ08);the National Natural Science Foundation of China (No.22275108);the Key Research and Development Program of Shandong Province,China (No.2019GGX103043).

摘　　要：Although metal-organic frameworks(MOFs)have been widely reported as precursors for obtaining various porous materials in recent years,the limited MOF types and monofunctional active site of MOF-based catalysts remain to be hard to crack.Herein,bimetallic MOFs,MCo-ZIFs stabilized by graphitized carbon nitride(g-C_(3)N_(4))and their pyrolytic M_(x)Co_(3)O_(4)/g-C_(3)N_(4) hybrids(M=Zn,Cu,Fe,Ni)have been designedly synthesized.The obtained M_(x)Co_(3)O_(4)/g-C_(3)N_(4) hybrids display synergistic photothermal effect from both M_(x)Co_(3)O_(4) and g-C_(3)N_(4) under visible light irradiation.Significantly,the solution temperature can be heated from room temperature(20℃)to 66℃ after 40 min irradiation.Therefore,the catalytic activity of M_(x)Co_(3)O_(4)/g-C_(3)N_(4) exceeds those of most reported catalysts under mild reaction conditions.The optimal ZnxCo_(3)O_(4)/g-C_(3)N_(4) catalyst realizes 96%conversion and 75%selectivity toward styrene oxide within 20 min.Incredibly,the CuxCo_(3)O_(4)/g-C_(3)N_(4) could achieve up to 89%selectivity toward styrene oxide.To our knowledge,this is the first report about the novel photothermal effect of ZIFs-derived metal oxides.

关 键 词：Metal-organic framework PYROLYSIS Photothermal effect Styrene epoxidation 

分 类 号：O64[理学—物理化学]