| 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 Author | Hutchings, Graham J.(Hutch@cardiff.ac.uk) |
| 2018-04-21 | |
| Source Publication | CATALYSIS SCIENCE & TECHNOLOGY
 |
| ISSN | 2044-4753 |
| Volume | 8Issue:8Pages:2211-2217 |
| Abstract | 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. |
| Funding Organization | China Scholarship Council (CSC) |
| DOI | 10.1039/c7cy02571h |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | China Scholarship Council (CSC)[201604910181] |
| WOS Research Area | Chemistry |
| WOS Subject | Chemistry, Physical |
| WOS ID | WOS:000433517700021 |
| Publisher | ROYAL SOC CHEMISTRY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/128168 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Hutchings, Graham J. |
| Affiliation | 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 |
| 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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