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Inter-connected and open pore hierarchical TS-1 with controlled framework titanium for catalytic cyclohexene epoxidation
Jiao, Yilai1,2; Adedigba, Abdul-Lateef1; He, Qian1; Miedziak, Peter1; Brett, Gemma1; Dummer, Nicholas F.1; Perdjon, Micheal1; Liu, Jinmin2; Hutchings, Graham J.1
Corresponding AuthorHutchings, Graham J.(Hutch@cardiff.ac.uk)
2018-04-21
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume8Issue:8Pages:2211-2217
AbstractA 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.
Funding OrganizationChina Scholarship Council (CSC)
DOI10.1039/c7cy02571h
Indexed BySCI
Language英语
Funding ProjectChina Scholarship Council (CSC)[201604910181]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000433517700021
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128168
Collection中国科学院金属研究所
Corresponding AuthorHutchings, Graham J.
Affiliation1.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
Recommended Citation
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.
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