Bio-inspired immobilization of metal oxides on monolithic microreactor for continuous Knoevenagel reaction

Wentong Song; Da Shi; Shengyang Tao; Zhaoliang Li; Yuchao Wang; Yongxian Yu; Jieshan Qiu; Min Ji; Xinkui Wang

doi:10.1016/j.jcis.2016.07.052

Bio-inspired immobilization of metal oxides on monolithic microreactor for continuous Knoevenagel reaction

J Colloid Interface Sci. 2016 Nov 1:481:100-6. doi: 10.1016/j.jcis.2016.07.052. Epub 2016 Jul 21.

Authors

Wentong Song¹, Da Shi², Shengyang Tao³, Zhaoliang Li¹, Yuchao Wang¹, Yongxian Yu¹, Jieshan Qiu⁴, Min Ji¹, Xinkui Wang¹

Affiliations

¹ School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, PR China.
² School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, PR China; Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, 92093, United States.
³ School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, PR China. Electronic address: taosy@dlut.edu.cn.
⁴ Carbon Research Laboratory, Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, PR China.

PMID: 27459172
DOI: 10.1016/j.jcis.2016.07.052

Abstract

A facile method is reported to construct monolithic microreactor with high catalytic performance for Knoevenagel reaction. The microreactor is based on hierarchically porous silica (HPS) which has interconnected macro- and mesopores. Then the HPS is surface modified by pyrogallol (PG) polymer. Al(NO3)3 and Mg(NO3)2 are loaded on the surface of HPS through coordination with -OH groups of PG. After thermal treatment, Al(NO3)3 and Mg(NO3)2 are converted Al2O3 and MgO. The as-synthesized catalytic microreactor shows a high and stable performance in Knoevenagel reaction. The microreactor possess large surface area and interconnected pore structures which are beneficial for reactions. Moreover, this economic, facile and eco-friendly surface modification method can be used in loading more metal oxides for more reactions.

Keywords: Catalytic microreactor; Hierarchically porous silica; Knoevenagel reaction; Metal oxides; Pyrogallol; Surface modification.