Microwave Hydrothermal Synthesis of 1T@2H−MoS2 as an Excellent Photocatalyst

Abstract

AbstractIn this work, a novel microwave hydrothermal method is developed to prepare hybrid 1T@2H−MoS2 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−MoS2 are much higher than those by 2H−MoS2, 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 .O2− dominates the photocatalytic degradation process with 1T phase producing more electrons. The introduction of 1T−MoS2 into 2H−MoS2 shows great potential for photocatalytic degradation, while microwave treatment could be an effective method to prepare the hybrid phase MoS2.