Inter-connected and open pore hierarchical TS-1 with controlled framework titanium for catalytic cyclohexene epoxidation

doi:10.1039/c7cy02571h

IMR OpenIR

	Inter-connected and open pore hierarchical TS-1 with controlled framework titanium for catalytic cyclohexene epoxidation
	Jiao, Yilai 1,2; Adedigba, Abdul-Lateef 1; He, Qian 1; Miedziak, Peter 1; Brett, Gemma 1; Dummer, Nicholas F.1; Perdjon, Micheal 1; Liu, Jinmin 2; Hutchings, Graham J.1
通讯作者	Hutchings, Graham J.(Hutch@cardiff.ac.uk)
	2018-04-21
发表期刊	CATALYSIS SCIENCE & TECHNOLOGY
ISSN	2044-4753
卷号	8 期号:8 页码:2211-2217
摘要	A post-synthesis method was developed to reduce the extra-framework titanium (Ti) in TS-1 zeolites (Si/Ti ratio = 50), in which tetrapropylamonium hydroxide (TPAOH) aqueous solution was used to promote the dissolution, redistribution and recrystallization processes, and hence to convert amorphous Ti species into zeolitic phases. It was found that TPAOH could effectively convert the extra-framework Ti into framework Ti, and the TPAOH concentration influenced the pore structure significantly. Under lower TPAOH concentration (i.e. 0.05-0.4 M), only closed meso-/macropores (grooves and hollow cavities) can be created in the TS-1 crystals. At an optimum concentration of 0.5 M TPAOH, open and connected hierarchical meso-pores and macropores were created in the resulting TS-1 zeolites. Compared with the parent TS-1, the amount of extra-framework titanium was reduced significantly from 14.4% to 0.3% and the meso-/macropore volume was increased from 0.014 to 0.168 cm(3) g(-1) accordingly upon TPAOH post treatment. Along with the parent TS-1 zeolite, the developed hierarchical TS-1 zeolites were assessed in the catalytic epoxidation of cyclohexene. It was confirmed that the amount of framework titanium and hierarchical pore structure influenced the catalytic activity considerably. Closed porosity slightly improved the cyclohexene conversion, whereas the open-pore sample shows the optimum catalytic activity in cyclohexene conversion.
资助者	China Scholarship Council (CSC)
DOI	10.1039/c7cy02571h
收录类别	SCI
语种	英语
资助项目	China Scholarship Council (CSC)[201604910181]
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
WOS记录号	WOS:000433517700021
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：52[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/128168
专题	中国科学院金属研究所
通讯作者	Hutchings, Graham J.
作者单位	1.Cardiff Univ, Sch Chem, Cardiff Catalysis Inst, Pk Pl, Cardiff CF10 3AT, S Glam, Wales 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Jiao, Yilai,Adedigba, Abdul-Lateef,He, Qian,et al. Inter-connected and open pore hierarchical TS-1 with controlled framework titanium for catalytic cyclohexene epoxidation[J]. CATALYSIS SCIENCE & TECHNOLOGY,2018,8(8):2211-2217.
APA	Jiao, Yilai.,Adedigba, Abdul-Lateef.,He, Qian.,Miedziak, Peter.,Brett, Gemma.,...&Hutchings, Graham J..(2018).Inter-connected and open pore hierarchical TS-1 with controlled framework titanium for catalytic cyclohexene epoxidation.CATALYSIS SCIENCE & TECHNOLOGY,8(8),2211-2217.
MLA	Jiao, Yilai,et al."Inter-connected and open pore hierarchical TS-1 with controlled framework titanium for catalytic cyclohexene epoxidation".CATALYSIS SCIENCE & TECHNOLOGY 8.8(2018):2211-2217.