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Combining two active states of FeOx in-situ in molecular sieve to deliver enhanced catalytic activity via creating special configuration and synergy
Citation
Yang, F., Zhou, L., Gao, S., Wang, X., Chen, J., Yuan, A., & Ang, E. H. (2020). Combining two active states of FeOx in-situ in molecular sieve to deliver enhanced catalytic activity via creating special configuration and synergy. Journal of Alloys and Compounds, 844, Article 156137. https://doi.org/10.1016/j.jallcom.2020.156137
Abstract
Combining different active states of metal species together in special configuration might trigger interesting synergetic effect for catalytic process. As a proof-of-concept, the present study has developed an ingenious approach to reach functional mesoporous molecular sieve which in-situ encapsulates two different states of highly-active FeOx inside centered core and nano-tunnel of mesoporous silica, respectively. The α-Fe2O3 in-situ immobilized nanoneedles coated by the porous silica afford ∼5 nm diameter, plus highly-dispersed Fe2O3 cluster-like species attachment in confined mesopore, which synergistically contributes to high activity and stabilization of catalyst. The combined iron oxides in special configuration deliver an appreciable catalytic activity in phenol hydroxylation (46.4% conversion, 87.9% benzenediol selectivity) during multiple catalytic cycles, compared to some reported results, which benefited from accelerating production of oxidative free radicals from H2O2 and the tailored micrpopore (∼1.4 nm) which could enhance the catalytic selectivity of targeted products. Furthermore, the photocatalytic antimicrobial effect of Fe catalyst against Escherichia coli was also demonstrated via the constructed synergy of two FeOx nanospecies with assistance of light.
Date Issued
2020
Publisher
Elsevier
Journal
Journal of Alloys and Compounds
Grant ID
National Natural Science Foundation (Grant no. 21908085)
National Natural Science Foundation (Grant no. U1703118)
National Natural Science Foundation (Grant no. 51672114)
Natural Science Foundation of Jiangsu Province (Grant no. BK20190961)
Natural Science Foundation of Jiangsu Province (Grant no. BK20181364)
Natural Science Foundation of Jiangsu Province (Grant no. BK20161357)
National Science Foundation of the Jiangsu Higher Education Institutions of China (Grant no. 19KJA310003)
Scientific Research Foundation of Jiangsu University of Science & Technology (Grant no. 1112921902)
Funding Agency
Jiangsu University of Science & Technology