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Microwave Hydrothermal Synthesis of 1T@2H−MoS 2 as an Excellent Photocatalyst
Author(s) -
Liu Haiyang,
Wu Rong,
Zhang Hongyan,
Ma Ming
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901569
Subject(s) - photocatalysis , high resolution transmission electron microscopy , x ray photoelectron spectroscopy , methyl orange , materials science , hydrothermal circulation , raman spectroscopy , crystallinity , microwave , chemical engineering , hydrothermal synthesis , transmission electron microscopy , phase (matter) , degradation (telecommunications) , nanotechnology , analytical chemistry (journal) , nuclear chemistry , chemistry , catalysis , optics , composite material , organic chemistry , physics , electronic engineering , quantum mechanics , engineering
In this work, a novel microwave hydrothermal method is developed to prepare hybrid 1T@2H−MoS 2 nanospheres, with the 1T and 2H phases confirmed by high‐resolution transmission electron microscopy (HRTEM), X‐ray photoelectron spectroscopy (XPS) and the stability of the hybrid phase verified by Raman spectroscopy. The efficiencies of methyl orange (MO) degradation and photo‐reduction of Cr(VI) by hybrid 1T@2H−MoS 2 are much higher than those by 2H−MoS 2 , which should be attributed to the synergistic effect of the coexistent 1T and 2H phases. In addition, the hybrid sample prepared by microwave method possesses superior photocatalytic performance than that by conventional hydrothermal method, due to the higher 1T phase concentration and different crystallinity. Free‐radical capture experiments show that . O 2 − dominates the photocatalytic degradation process with 1T phase producing more electrons. The introduction of 1T−MoS 2 into 2H−MoS 2 shows great potential for photocatalytic degradation, while microwave treatment could be an effective method to prepare the hybrid phase MoS 2 .