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论文类型：期刊论文

发表时间：2016-09-30

发表刊物：CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY

收录刊物：SCIE、Scopus

卷号：18

期号：3

页面范围：41-48

ISSN号：1008-6234

关键字：sol-gel preparation; mesoporous titanium silicate structure; anionic surfactant co-template; olefin oxidation; green catalyst

摘要：Ti-containing mesoporous silica materials (Ti-MSs) with isolated tetrahedrally coordinated Ti species have been widely applied in bulk molecular catalysis. Herein, Ti-MSs were synthesized using anionic surfactant SDS as the co-template. The SDS molecular assembled structures can interact with silica species through the interface hydrogen bonds leading to the formation of mesoporous silica structure with compact Ti-O bonds, lower hydrophilicity and low template cost. The influence of adding SDS as the co-template on the oxidation of styrene with aqueous H2O2 as the oxidant was investigated. Ti-MSs using SDS as the co-template showed better catalytic performance as compared with mesoporous titanium silicate synthesized with CTAB serving as the sole template. Moreover, the Ti-MSs synthesized at a Ti/Si ratio of 0.005 demonstrated an optimized performance for styrene oxidation with styrene conversion improved by 14.8%, benzaldehyde selectivity improved by 13.7% and styrene oxide selectivity improved by 9.2% when the reaction time was 6 h.