Hydrothermal Preparation Of MoS₂ Nanosheets And Their Properties Research

Two-dimensional layered materials are rich in light,electricity,magnetism,adsorption and catalysis,and have been widely studied as new functional materials,of which molybdenum disulfide?MoS₂?is particularly prominent in two-dimensional layered materials,and its optical catalysis Performance,electrical properties,and magnetic properties have received great attention from researchers.As a photocatalyst,semiconductor materials use solar energy as a light source,convert light energy into chemical energy,and effectively degrade organic pollutants in wastewater.Due to the advantages of simple equipment,easy operation,and high processing efficiency,the photocatalytic degradation process is considered to be an ideal solution to the wastewater pollution.However,for the current industrial applications of photocatalysts,photocatalytic reactions can only be performed in response to UV light.In order to further study the photocatalytic degradation efficiency,molybdenum disulfide nanosheets with a narrow bandgap?1.8 ev?were used as research objects to study molybdenum disulfide.Photocatalytic properties of nanosheets and magnetic properties of doped elements.In this paper,various modern test and analysis methods such as scanning electron microscope?SEM?,X-ray diffraction energy?XRD?,UV-visible spectrophotometer?TU-1810DPC?,and superconducting quantum interference?SQUID?magnetometer are used to study the differences.Morphological effects of molybdenum disulfide nanosheets and different hydrothermal and hydrothermal temperatures on photocatalytic degradation of methyl orange solution.Finally,the different concentrations of molybdenum disulfide reaction solution doping Mn elements are discussed.The photocatalytic performance and magnetic properties of molybdenum disulfide nanosheets doped with Mn were measured.?1?The results of optical catalysis of molybdenum disulfide with different morphologies show that in the four different morphology of molybdenum disulfide nanosheets,nanoflowers,hollow network and nanospheres,the nanosheeted molybdenum disulfide solution for methyl orange solution Optical catalytic degradation is the best,which can reach 70%.?2?Different preparation temperature and preparation time the photocatalytic study of molybdenum disulfide showed that when the preparation temperature is 180? ,200? ,220? and the preparation time is 16 h,24 h,32 h,the preparation temperature is 200? and the preparation time is 24 h.The photodegradation efficiency of nano-flaky molybdenum disulfide on methyl orange solution is the best,which can reach 90%.?3?The photocatalytic performance of molybdenum disulfide nanosheets doped with Mn elements shows that the photocatalytic degradation of methyl orange disulfide nanosheets prepared from pure ammonium molybdate and thiourea has a degradation rate of 36.2%..The Mn-doped molybdenum disulfide nanosheets showed a photocatalytic degradation of methyl orange solution of 19%.The photocatalytic degradation efficiency of the molybdenum disulfide nanosheets doped with Mn elements has not been improved.On the contrary,the doping of Mn elements has suppressed the photocatalytic degradation performance to some extent.?4?The magnetic properties of doped Mn at different reactant concentrations show that:when the concentration of the reactants ammonium molybdate and thiourea is low,doped molybdenum disulfide composite material in the superconducting quantum interferometer?SQUID?magnetometer The ferromagnetism and paramagnetism are exhibited under the test.When the concentrations of the reactants,ammonium molybdate and thiourea are high,they show diamagnetic and weak paramagnetism under the superconducting quantum interference?SQUID?magnetometer test.