Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2017-02-05

Journal: JOURNAL OF ALLOYS AND COMPOUNDS

Included Journals: EI、SCIE

Volume: 693

Page Number: 500-509

ISSN: 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.