Pd/MoS_(2)花状超结构的制备及其光热催化铃木偶联反应性能研究  

Preparation of Pd/MoS_(2)Flower-Like Superstructures for Photothermal Catalysis of Suzuki Coupling Reaction

作　　者：林敏 吕函函 刘子潇 王海风[1] 姜琴 陈志钢[1] LIN Min;LV Hanhan;LIU Zixiao;WANG Haifeng;JIANG Qin;CHEN Zhigang(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620

出　　处：《中国材料进展》2024年第7期637-643,共7页Materials China

基　　金：中央高校基本科研业务费专项资助项目(2232024Y-01);国家自然科学基金资助项目(52161145406)。

摘　　要：Pd作为高活性的贵金属催化剂广泛用于铃木偶联反应等有机反应。为提高Pd催化剂对铃木偶联反应的催化性能,采用具有光热效应的MoS_(2)作为载体,设计并制备Pd/MoS_(2)复合纳米催化剂。首先通过水热法合成MoS_(2)花状超结构,该结构由纳米片(片径为200~300 nm,厚度约为7 nm)组装而成。利用还原法在MoS_(2)花状超结构的表面负载Pd纳米颗粒,其直径约为11 nm。随后,以Pd/MoS_(2)花状超结构为催化剂研究了激光加热和油浴加热两种条件下的铃木偶联反应效率。随着波长808 nm的激光的强度从1增加到4 W/cm^(2),激光加热使溶液平衡温度从29.4升高到60.8℃,相应的光热催化产率从30.5%提高到86.3%,明显高于油浴加热同等温度下的热催化产率(24.3%~60.4%)。当反应温度为40℃时,光热催化速率是热催化的1.5倍。综上,Pd/MoS_(2)花状超结构展现了较好的光热催化性能,为设计高活性的铃木偶联反应催化剂提供了新思路。Pd has been widely used as a highly active noble metal catalyst for organic reactions such as Suzuki coupling reaction.To improve its catalytic performance for Suzuki coupling reaction,Pd/MoS_(2)flower-like superstructures were designed and prepared by using MoS_(2)with photothermal effect as the carrier.Firstly,MoS_(2)flower-like superstructures were synthesized by a simple hydrothermal method,and they were constructed from nanosheets with diameters of 200~300 nm and thicknesses of about 7 nm.Pd nanoparticles with diameters of about 11 nm were loaded on the surface of MoS_(2)by a reduction route.Subsequently,by using Pd/MoS_(2)flower-like superstructures as the catalyst,the conversion efficiency of Suzuki coupling reaction was investigated under both laser heating and oil bath heating conditions.When the intensity of 808 nm laser as heating sources went up from 1 to 4 W/cm^(2),the equilibrium temperature of solution from laser heating increased from 29.4 to 60.8℃.Accordingly,the photothermal catalysis yield enhanced from 30.5%to 86.3%,which was significantly higher than the thermocatalytic yield(from 24.3%to 60.4%)at the same temperature from oil bath heating.When the reaction temperature was 40℃,the photothermal catalysis rate was 1.5 times as high as that of the thermal catalysis.Therefore,Pd/MoS_(2)flower-like superstructures show good photothermal catalytic performance,which assists in the design of highly active catalysts for Suzuki coupling reaction.

关 键 词：二硫化钼纳米片 钯纳米颗粒 铃木偶联反应 光热催化 

分 类 号：O643.36[理学—物理化学] TB383[理学—化学]