Synthesis and characterization of bubble wrap-like hollow barium silicate–carbonate nanospheres for the epoxidation of styrene

Tan, Kok Hou and Iqbal, Anwar and Adam, Farook and Abu Bakar, N.H.H. and M. Yusop, Rahimi and Ahmad, Mohammad Norazmi (2020) Synthesis and characterization of bubble wrap-like hollow barium silicate–carbonate nanospheres for the epoxidation of styrene. Journal of Materials Research and Technology, 9 (5). pp. 11087-11098. ISSN 2238-7854

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Abstract

Novel porous bubble wrap-like hollow barium silicate–carbonate nanospheres were successfully prepared at a barium/CTAB molar ratio of 0.75 and 1.00. The average pore size, BET surface area and total pore volume of the most catalytically active catalyst in the epoxidation of styrene, 1.00BaMST were 5.0 nm, 42 m2 g−1 and 0.0771 cm3 g−1, respectively. The styrene epoxidation reaction was carried out using H2O2 as an oxidant. Barium silicate and carbonate groups detected on the catalyst’s surface are proposed to activate the H2O2 and selectively oxidize the styrene to styrene oxide. The 1.00BaMST achieved 63.3% of styrene conversion and 77.8% of epoxide selectivity at mild conditions (3 h, 60 ◦C). The reaction energy barrier was calculated to be 17.3 kJ mol−1.

Item Type:	Article (Journal)
Additional Information:	7148/82272
Uncontrolled Keywords:	Barium silicate; Barium carbonate; Mesoporous silica; Hollow nanospheres; Alkene epoxidation
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Chemistry
Depositing User:	Dr Mohammad Norazmi Ahmad
Date Deposited:	18 Aug 2020 16:14
Last Modified:	18 Feb 2021 16:08
URI:	http://irep.iium.edu.my/id/eprint/82272

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