Citation: Qingyan Chu, Jing Chen, Wenhua Hou, Haoxuan Yu, Ping Wang, Rui Liu, Guangliang Song, Hongjun Zhu, Pingping Zhao. Enhancement of catalytic activity by homo-dispersing S₂O₈^2--Fe₂O₃ nanoparticles on SBA-15 through ultrasonic adsorption[J]. Chinese Journal of Catalysis, ;2018, 39(5): 955-963. doi: 10.1016/S1872-2067(17)63007-9 shu

Enhancement of catalytic activity by homo-dispersing S₂O₈^2--Fe₂O₃ nanoparticles on SBA-15 through ultrasonic adsorption

Qingyan Chu ^a,b, ,
Jing Chen ^a ,
Wenhua Hou ^c ,
Haoxuan Yu ^d ,
Ping Wang ^a,d ,
Rui Liu ^a ,
Guangliang Song ^a ,
Hongjun Zhu ^a ,
Pingping Zhao ^d

a College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China;
b Research institute of QILU petrochemical company, SINOPEC, Zibo 255400, Shandong, China;
c Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, Jiangsu, China;
d School of Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China

Received Date: 23 November 2017
Revised Date: 29 December 2017

Fund Project: This work was supported by the National Key Research and Development Program of China (2016YFB0301703), the Joint Innovation and Research Funding-prospective Joint Research Projects (BY2016005-06), and the National Natural Science Foundation of China (21506118).

Mesoporous superacids S₂O₈^2--Fe₂O₃/SBA-15 (SFS) with active nanoparticles are prepared by ultrasonic adsorption method. This method is adopted to ensure a homo-dispersed nanoparticle active phase, large specific surface area and many acidic sites. Compared with bulk S₂O₈^2--Fe₂O₃, Brönsted acid catalysts and other reported catalysts, SFS with an Fe₂O₃ loading of 30% (SFS-30) exhibits an outstanding activity in the probe reaction of alcoholysis of styrene oxide by methanol with 100% yield. Moreover, SFS-30 also shows a more excellent catalytic performance than bulk S₂O₈^2--Fe₂O₃ towards the alcoholysis of other ROHs (R=C₂H₅-C₄H₉). Lewis and Brönsted acid sites on the SFS-30 surfaces are confirmed by pyridine adsorbed infrared spectra. The highly efficient catalytic activity of SFS-30 may be attributed to the synergistic effect from the nano-effect of S₂O₈^2--Fe₂O₃ nanoparticles and the mesostructure of SBA-15. Finally, SFS-30 shows a good catalytic reusability, providing an 84.1% yield after seven catalytic cycles.
- Mesoporous superacid,
- Nanoparticle,
- Nano effect,
- S₂O₈^2--Fe₂O₃/SBA-15,
- Acidic site,
- Ultrasonic adsorption,
- Alcoholysis
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Enhancement of catalytic activity by homo-dispersing S₂O₈^2--Fe₂O₃ nanoparticles on SBA-15 through ultrasonic adsorption