铈掺杂对α-Bi2Mo3O12纳米片催化剂丙烯选择性氧化性能的影响
Effect of cerium doping on performance of α-Bi2Mo3O12 nanosheet catalysts for selective oxidation of propylene
张鑫 1杨艳艳 2周如金 3许松泠 4单书峰 3曾兴业3
作者信息
- 1. 吉林化工学院化学与制药工程学院,吉林 吉林 132000;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
- 2. 吉林化工学院化学与制药工程学院,吉林 吉林 132000
- 3. 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
- 4. 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;华南理工大学化学与化工学院,广东 广州 510000
- 折叠
摘要
采用快速微波辅助水热法制备了4 种不同的Bi2-xCexMo3O12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Bi2-xCexMo3O12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Bi2-xCexMo3O12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%.Bi2-xCexMo3O12 纳米片催化剂的性能与结晶度呈负相关.用 XPS 表征了 Bi2-xCexMo3O12 的氧迁移率,Bi2-xCexMo3O12的催化性能与其氧流动性呈正相关.
Abstract
Four kinds of Bi2-xCexMo3O12 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 Bi2-xCexMo3O12 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 Bi2-xCexMo3O12 is characterized by XPS.The catalytic performance of Bi2-xCexMo3O12 is positively correlated with its oxygen fluidity.
关键词
Bi2-xCexMo3O12/丙烯/丙烯醛Key words
Bi2-xCexMo3O12/propylene/acrolein引用本文复制引用
基金项目
广东省基础与应用基础研究基金(2021A1515010278)
广东省基础与应用基础研究基金(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)
茂名绿色化工新材料产业人才振兴(扬帆计划)项目(MMGCIRI-2022YFJH-Y-052)
出版年
2024
NETL
NSTL
万方数据