铈掺杂对α-Bi_(2)Mo_(3)O_(12)纳米片催化剂丙烯选择性氧化性能的影响  

Effect of cerium doping on performance ofα-Bi_(2)Mo_(3)O_(12) nanosheet catalysts for selective oxidation of propylene

作　　者：张鑫 杨艳艳[1] 周如金[2] 许松泠 单书峰 曾兴业[2] ZHANG Xin;YANG Yan-yan;ZHOU Ru-jin;XU Song-ling;SHAN Shu-feng;ZENG Xing-ye(School of Chemistry and Pharmaceutical Engineering,Jilin Institute of Chemical Technology,Jilin 132000,China;Key Laboratory of Inferior Crude Oil Processing of Guangdong Provincial Higher Education Institutes,Guangdong University of Petrochemical Technology,Maoming 525000,China;School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510000,China)

机构地区：[1]吉林化工学院化学与制药工程学院,吉林吉林132000 [2]广东石油化工学院广东高校劣质油加工重点实验室,广东茂名525000 [3]华南理工大学化学与化工学院,广东广州510000

出　　处：《现代化工》2024年第7期145-150,共6页Modern Chemical Industry

基　　金：广东省基础与应用基础研究基金(2021A1515010278,2020A1515110729);广东石油化工学院博士启动项目(2020bs002);茂名绿色化工新材料产业人才振兴(扬帆计划)项目(MMGCIRI-XM-2022-003,MMGCIRI-2022YFJH-Y-052)。

摘　　要：采用快速微波辅助水热法制备了4种不同的Bi_(2-x)Ce_(x)Mo_(3)O_(12)纳米片催化剂。在制备过程中通过调节铈的掺杂量可以改变合成催化剂的形貌和结构,成功地提高了Bi_(2-x)Ce_(x)Mo_(3)O_(12)纳米片催化剂的比表面积。结果表明,煅烧温度为500℃、pH为3、掺杂量x=0.05时制备的Bi_(2-x)Ce_(x)Mo_(3)O_(12)纳米片催化剂具有最高的丙烯选择性氧化性能,丙烯转化率为42.1%,丙烯醛选择性为88.3%。Bi_(2-x)Ce_(x)Mo_(3)O_(12)纳米片催化剂的性能与结晶度呈负相关。用XPS表征了Bi_(2-x)Ce_(x)Mo_(3)O_(12)的氧迁移率,Bi_(2-x)Ce_(x)Mo_(3)O_(12)的催化性能与其氧流动性呈正相关。Four kinds of Bi_(2-x)Ce_(x)Mo_(3)O_(12) nanosheet catalysts are prepared by rapid microwave assisted hydrothermal method.The surface area of catalysts is successfully increased through adjusting the doped amount of cerium to change the morphology and structure of the synthesized catalysts.It is shown by the results that Bi_(2-x)Ce_(x)Mo_(3)O_(12) nanosheet catalyst prepared at a calcination temperature of 500℃,a pH of 3 and a doping amount of 0.05 exhibits the highest performance for selective oxidation of propylene,delivering a propylene conversion of 42.1%and an acrolein selectivity of 88.3%.The performance of the catalyst is negatively correlated with its crystallinity,because higher crystallinity will inhibit the flow of lattice oxygen between the lattices,thus inhibiting the selective oxidation and reducing the conversion rate of the reaction.The oxygen mobility of Bi_(2-x)Ce_(x)Mo_(3)O_(12) is characterized by XPS.The catalytic performance of Bi_(2-x)Ce_(x)Mo_(3)O_(12) is positively correlated with its oxygen fluidity.

关 键 词：Bi2-xCexMo3O12 丙烯 丙烯醛 

分 类 号：TQ203[化学工程—有机化工]