Citation: Rongzhi Tang, Tong Chen, Yong Chen, Yuanzhuo Zhang, Gongying Wang. Core-shell TiO₂@SiO₂ catalyst for transesterification of dimethyl carbonate and phenol to diphenyl carbonate[J]. Chinese Journal of Catalysis, ;2014, 35(4): 457-461. doi: 10.1016/S1872-2067(14)60059-0 shu

Core-shell TiO₂@SiO₂ catalyst for transesterification of dimethyl carbonate and phenol to diphenyl carbonate

1.
a Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China;

Corresponding author: Tong Chen,
Received Date: 30 December 2013
Available Online: 24 January 2014
Fund Project: 国家高技术研究发展计划(863 计划, SS2013AA031703) (863 计划, SS2013AA031703)四川省科技支撑计划(2013GZX0135) (2013GZX0135)四川省青年科技创新研究团队项目(2013TD0010). (2013TD0010)

Core-shell TiO₂@SiO₂ was prepared using a combination of reverse microemulsion and precipitation methods and used as a heterogeneous catalyst for the transesterification of dimethyl carbonate and phenol. TiO₂@SiO₂ calcined at 200 ℃ gave the best catalytic performance. When the amount of catalyst was 0.20 g, the phenol conversion and transesterification selectivity were 41.8% and 100%, respectively. Transmission electron microscopy was used to characterize the core-shell TiO₂@SiO₂ structure, and the results showed that TiO₂@SiO₂ is bilayer with a TiO₂ core of diameter 220-300 nm and SiO₂ shell of thickness 40-60 nm. The TiO₂@SiO₂ was reusable, and phenol conversion remained above 40% when the TiO₂@SiO₂ was used four times. The catalytic performance of TiO₂@SiO₂ in the transesterification of dimethyl carbonate and phenol was promoted by the formation of Ti-O-Si bonds.
- Core-shell,
- TiO₂@SiO₂,
- Diphenyl carbonate,
- Dimethyl carbonate,
- Transesterification
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沈阳化工大学材料科学与工程学院沈阳 110142

Core-shell TiO2@SiO2 catalyst for transesterification of dimethyl carbonate and phenol to diphenyl carbonate

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通讯作者: 陈斌, bchen63@163.com

Core-shell TiO₂@SiO₂ catalyst for transesterification of dimethyl carbonate and phenol to diphenyl carbonate