From tremella‐like MoS ₂ to α ‐MoO ₃ nanoplates: sintering synthesis and adsorption properties

Abstract

A simple calcination method was explored to synthesise the tremella-like molybdenum disulphide (MoS 2), Mo trioxide (MoO 3)/MoS 2 and MoO 3 nanoplates by using the pristine MoS 2 nanosheets as the precursor. The possible formation and growth mechanism from the pristine MoS 2 to the tremella-like MoS 2 , MoO 3 /MoS 2 nanoplates and MoO 3 nanoplates was proposed. It was found that the calcination temperature was a key factor for the formation, ingredient and phase structure of the three samples. The adsorption properties of the three samples for an aqueous solution of methylene blue (MB) at room temperature were investigated. The results revealed that the products exhibit the better adsorption capacities with increasing the ingredient of MoO 3 in the transformation process from MoS 2 to MoO 3. Therefore, the pure MoO 3 nanoplates have the highest adsorption and removal rates, which reached 96.9% at MB concentration of 10 mg/l and 90.9% at MB concentration of 20 mg/l.

The Combination of MoS2/WO3 and Its Adsorption Properties of Methylene Blue at Low Temperatures

“…This peak can be attributed to O 2− in the Mo-O bond, which is in agreement with the results of Mo 3d in MoS 2 /WO 3 . Cui et al proved that with the increase in MoO 3 composition in the transformation of MoS 2 to MoO 3 , the product showed better adsorption capacity [23]. Besides, the peaks at the binding energy of 529.0 eV in Figure 4B 1 and 532.6 eV in Figure 4C 3 were both due to the adsorbed O on the surface of the samples.…”

Residual Oxygen Effects on the Properties of MoS2 Thin Films Deposited at Different Temperatures by Magnetron Sputtering

“…From the results, it was found that the generation of Mo oxides during high-temperature deposition changed the trend of grain size variation with deposition temperature. Cui et al and Zhong et al [25,26] found that MoO3 diffraction peaks appeared in the MoS2 samples through the calcination method when the calcination temperature exceeded 300 °C, and the generation of MoO3 had a great influence on the absorption spectrum of MoS2 nanoplates. Liu et al [27] investigated the evolutions of morphology and electronic properties of the MoS2 layer exposed to ultraviolet ozone.…”

Morphology-controlled WO3−x homojunction: hydrothermal synthesis, adsorption properties, and visible-light-driven photocatalytic and chromic properties

“…It has been reported that the surface of the homojunction is easily negative with abundant oxygen vacancies [39]. As was previously discussed, MoO 3 can adsorb with the positive surfaces of MB and RhB, due to electrostatic attraction [40]. In order to ensure the effect of electronegativity, CR, an anionic organic dye replaces the cationic organic dyes RhB and MB.…”