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Indexed by:期刊论文

Date of Publication:2017-02-05

Journal:JOURNAL OF ALLOYS AND COMPOUNDS

Included Journals:SCIE、EI

Volume:693

Page Number:500-509

ISSN No.:0925-8388

Key Words:Titanium carbide; Nanocrystal; Arc-discharge plasma; Morphologic control; Electrocatalysis; 2,4-Dichlorophenol

Abstract:The well-defined core/shell-type titanium carbide/carbon nanocrystals have been synthesized by DC arc-discharge plasma in diverse atmospheres (H-2, Ar, He). It is confirmed that the TiC/C nanocrystals are diversiform in crystallographic morphologies with the exposed facets, e.g. rhombic, cubic, truncated-cubic and truncated-octahedral. The energetic ions of H+ and Ar+ within the arc-flame greatly influence the growth of truncated-octahedral TiC seeds and result in the final morphologies. Electrocatalytic behaviors of four kinds of TiC/C nanocrystals were preliminarily investigated by using 2,4-dichlorophenol (2,4-DCP) as a pollutant target. It is indicated that the removal efficiency of 2,4-DCP can reach to 73% at an appropriate bias potential in 180 min. With the increase of the area of (111) facets on a TiC/C nanocrystal, the bias potential becomes smaller and the removal efficiency gets higher. Such TiC/C nanocrystals can be excellent as the electrochemical electrode to degrade the refractory organic pollutants. (C) 2016 Elsevier B.V. All rights reserved.