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Indexed by:期刊论文

Date of Publication:2017-11-15

Journal:2nd International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment (EECAT)

Included Journals:Scopus、SCIE、EI、CPCI-S

Volume:297

Issue:,SI

Page Number:335-343

ISSN No.:0920-5861

Key Words:Hollow zeolite; Phenol degradation; Fe Cu bimetal; Encapsulate

Abstract:Highly dispersed Fe-Cu bimetallic oxide nanoparticles were successfully encapsulated in hollow Silicalite-1 single crystals (Fe2O3CuO@ Hol S-1) by tetrapropylammonium hydroxide (TPAOH) hydrothermal treatment with an "impregnation-dissolution-recrystallization" process. Due to the Fe-Cu bimetallic interaction compared with single iron oxide, Fe-Cu bimetallic oxide exhibits a higher dispersion with the particle size decreasing from similar to 11.3 nm to similar to 3.7 nm. For aqueous phenol degradation, the Fe2O3CuO@ Hol-S-1 catalyst exhibits high activity attributed to the enhanced transport of reactants/products in the short microporous channels (20 nm) and the small metal oxide particle size. Interestingly, the particle size of encapsulated Fe2O3-CuO (3.7 nm) is larger than that of zeolite micropore (0.53 nm), which helps preventing the leaching of metal oxide that is a significant problem for conventional supported Fe catalyst in this reaction. (C) 2017 Elsevier B.V. All rights reserved.