Relationship between the structure and catalytic performance of MoS with different surfactant-assisted syntheses in the hydrodesulfurization reaction of 4,6-DMDBT

• Published in: RSC advances Vol. 1; no. 13; pp. 76 - 768
• Main Authors: Chu, Suya, Zhou, Weixia, Zhang, Chenyang, Zheng, Yi, Liu, Yang, Liu, Yongjun
• Format: Journal Article
• Language: English
• Published: 19.02.2020
• ISSN: 2046-2069
• DOI: 10.1039/c9ra08407j

Surfactants are important factors in the hydrothermal synthesis of MoS 2 with different morphologies. Herein, we report the synthesis of MoS 2 via the hydrothermal method combined with a single-source precursor with the assistance of different surfactants (CTAB/SDS/SDBS). The synthesis mechanisms of MoS 2 with different morphologies and their effects on 4,6-DMDBT in hydrodesulfurization (HDS) have been systematically studied. MoS 2 -CTAB was prepared by the adsorption of molybdate radicals, nucleation and formation. MoS 2 -SDS and MoS 2 -SDBS were synthesized via four steps, namely, adsorption, insertion, exfoliation and assembly, and the relationship between the morphology-structure-performance of MoS 2 in the hydrodesulfurization of 4,6-DMDBT was investigated. It was established that the desulfurization rate of MoS 2 , HYD ratio and selectivity of the MoS 2 increased in the order: MoS 2 -SDBS > MoS 2 -CTAB > MoS 2 -SDS, which exhibited a positive correlation with the average number of layers and dispersion, and a negative correlation with the average slab length and the ratio of the Mo edge/corner sites of MoS 2 . Among all the MoS 2 , MoS 2 -SDBS exhibited the best HDS performance. Surfactants are important factors in the hydrothermal synthesis of MoS 2 with different morphologies.