Facile one-pot solvothermal technique to synthesis ZnS / graphene nanoplatelets (0.2) nanocomposites

Abstract

In this work, we report the fabrication of ZnS / graphene nanoplatelets (0.2) nanocomposites (ZnS/G(0.2)) by a simple step solvothermal manner. The nanocomposite with weight ratio (0.2) of graphene nanoplatelets was prepared and characterized by several techniques. X-Ray diffraction measurements have shown three sharp peaks at (111) ‘(220) ‘(311) Miller indices, which referred to Sphalerite and Wurtzite phases of the cubic face. The average crystal sizes of 11.03 nm to 14.41 nm for ZnS nanoparticles. The graphene nanoplatelets enhanced crystallinity properties of prepared nanocomposites. Fourier-transform infrared and Raman spectrums confirm formation of ZnS nanoparticles and ZnS/G(0.2) nanocomposites. Furthermore, FESEM was performed to study morphology and structure of nanocomposites. BET isotherm, and the BJH method have given information consistent with Type V with the H3 hysteresis loops. Moreover, the results have supported the effective change in the surface area, pore-volume, pore diameter, and external surface area values.

Recent progress in semiconductor/graphene photocatalysts: synthesis, photocatalytic applications, and challenges

“…Often methanol, ethanol or water is used as a solvent and the nanoparticles are grown under high pressure and temperature. 7 For example, ZnS/graphene nanoplatelets were synthesized by a solvothermal route, wherein a mixture of graphene nanoplatelets and zinc acetate in ethylene glycol were ultrasonicated for an hour, and sodium sulfide solution was added into the mixture that was then transferred into an autoclave and heated to 1600 °C for 15 h. 53 The obtained ZnS/graphene nanoplatelets composite was then characterized by SEM, Raman, AFM, XRD, and DRS studies. 53 Further, a series of Cu 2 O–rGO was synthesized through solvothermal method for the photocatalytic degradation Rhodamine B dye.…”

“… 7 For example, ZnS/graphene nanoplatelets were synthesized by a solvothermal route, wherein a mixture of graphene nanoplatelets and zinc acetate in ethylene glycol were ultrasonicated for an hour, and sodium sulfide solution was added into the mixture that was then transferred into an autoclave and heated to 1600 °C for 15 h. 53 The obtained ZnS/graphene nanoplatelets composite was then characterized by SEM, Raman, AFM, XRD, and DRS studies. 53 Further, a series of Cu 2 O–rGO was synthesized through solvothermal method for the photocatalytic degradation Rhodamine B dye. 54 The SEM and FTIR data confirmed the reduction of GO and the successful fabrication of Cu 2 O/rGO x composites with various wt% of rGO to Cu 2 O, where x (0, 0.05, 0.1, 0.2 and 0.5 wt%), respectively; Fig.…”

“…6a–d . 53 Similarly, introducing rGO into ZnO improved its photocatalytic activity by enhancing the light absorption range and intensity. 68 Furthermore, the synthesized ZnS/rGO photocatalyst, with various ratios of rGO, exhibited a red shift in the absorption edge of the synthesized composites while also improving its light-harvesting capability.…”