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Indexed by:Journal Papers

Date of Publication:2019-08-01

Journal:JOVE-JOURNAL OF VISUALIZED EXPERIMENTS

Included Journals:SCIE、PubMed

Issue:150

ISSN No.:1940-087X

Key Words:Chemistry; Issue 150; Nanosheet aggregation; catalysts; nanostructures; nanosheets; hydrodeoxygenation; lignin

Abstract:We herein present a method for the synthesis of HNbWO6, HNbMoO6, HTaWO6 solid acid nanosheet modified Pt/CNTs. By varying the weight of various solid acid nanosheets, a series of Pt/xHMNO(6)/CNTs with different solid acid compositions (x = 5, 20 wt%; M = Nb, Ta; N = Mo, VV) have been prepared by carbon nanotube pretreatment, protonic exchange, solid acid exfoliation, aggregation and finally Pt particles impregnation. The Pt/xHMNO(6)/CNTs are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and NH3-temperature programmed desorption. The study revealed that HNbWO6 nanosheets were attached on CNTs, with some edges of the nanosheets being bent in shape. The acid strength of the supported Pt catalysts increases in the following order: Pt/CNTs < Pt/5HNbWO(6)/CNTs < Pt/20HNbMoO(6)/CNTs < Pt/20HNbWO(6)/CNTs < Pt/20HTaWO(6)/CNTs. In addition, the catalytic hydroconversion of lignin-derived model compound: diphenyl ether using the synthesized Pt/20HNbWO(6) catalyst has been investigated.