Effect of Mixing of Carbon Support from Sawdust and Sugarcane Bagasse by Hydrothermal Carbonization for Synthesis of Molybdenum Disulfide (MoS2) Catalyst

Molybdenum disulfide (MoS2) catalyst on carbon support from varying ratio of sawdust and sugarcane bagasse has been successfully synthesized by hydrothermal carbonization and calcination process. Hydrothermal carbonization of lignocellulosic structure into carbon support is investigated at 200 oC for 24 hr and calcination at 600 °C for 2 hr. The precursor of MoS2 catalyst is prepared using thiourea (CH4N2S) and ammonium molybdate tetrahydrate ((NH4)6Mo7O24 . 4H2O) loaded on carbon support. The lignocellulosic structure as hemicellulose and cellulose is changed at high temperature via hydrothermal carbonization and calcination. The distribution of molybdenum disulfide on carbon support is varied based on morphology and functional group of carbon support. The morphology and functional group were analyzed using Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). It shows that carbon support at equal ratio (1:1) of sawdust and sugarcane bagasse is an optimum ratio with high distribution of molybdenum disulfide catalyst on carbon support.

The novel and facile preparation of multilayer MoS2 crystals by a chelation-assisted sol–gel method and their electrochemical performance

Multilayer molybdenum disulfide was prepared by a chelation-assisted sol–gel method with ammonium molybdate tetrahydrate, thioacetamide and diethylenetriamine pentaacetic acid (Dtpa), followed by calcination.

Green and Facile Synthesis of Molybdenum Oxide-Graphene Composite Electrodes for Supercapacitor Application

MoO3-graphene composite have been successfully synthesized via facile, effective and scalable solvothermal process as electrode materials for supercapacitors. Highly pristine graphene synthesized from mild treatment of raw highly pyrolytic graphite in proper ratio of ethanol and water. The field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS) and transmission electron microscope (TEM) revealed that the formation of MoO3 particles from ammonium molybdate tetrahydrate precursor and ethylene glycol as reducing agent during solvothermal treatment. The cyclic voltammetry (CV) showed that MoO3-graphene composite electrodes exhibited capacitive performance of 148 F/g in the presence of mild 1 M Na2SO3 aqueous electrolyte. The enhanced electrochemical performance of the composite electrodes can be ascribed to the high electrical conductivity of the synthesized graphene and the good pseudocapacitance of MoO3.