Co-doped MoS2 aerogel catalyst, preparation method and application thereof

Abstract

The invention belongs to the technical field of catalysts, and particularly relates to a Co-doped MoS2 aerogel catalyst, a preparation method and application of the Co-doped MoS2 aerogel catalyst in oxidative degradation of organic pollutants in water. The aerogel contains 22.0 wt.%-24.5 wt.% of Co-doped MoS2 nanosheets, Co doping drives MoS2 to be converted from an inert 2H semiconductor to a high-activity 1T metal phase, S vacancies are induced to be generated, the PMS activation efficiency is remarkably improved, meanwhile, the co-catalysis effect of MoS2 accelerates Co < 2 + > / Co < 3 + > circulation and promotes rapid regeneration of Co < 2 + > sites, the synergistic effect of Mo-Co and the S vacancies remarkably reduce PMS activation energy barriers, the yield of active free radicals is increased, and the PMS activation efficiency is improved. The oxidative degradation efficiency of the Cox-MoS2 nanosheet on pollutants is improved. Cox-MoS2 nanosheets are further subjected to polydopamine functionalization treatment and then crosslinked with chitosan to form aerogel with super hydrophilicity, a hierarchical pore structure and a spontaneous suspension characteristic, the utilization rate of an oxidizing agent is further increased, the pollutant degradation efficiency is enhanced, secondary pollution caused by Co ion leakage is relieved, and the recovery cost is reduced.

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