Growth of crystalline WO3-ZnSe nanocomposites: an approach to optical, electrochemical, and catalytic properties

Abstract

In this study, novel growth of WO3-ZnSe nanocomposites was carried out by a simple, low-cost hydrothermal process under subcritical conditions and is reported for the first time in just 5 h. The products were characterized in detail by multiform techniques: X-ray diffraction, scanning electron microscopy (SEM), optical studies, and Fourier transform analysis. The influence of ZnSe on the structural, morphological, compositional, optical, and catalytic properties of WO3 is demonstrated. The WO3 metal oxide material is grown in a hexagonal crystal structure with wide-band-gap and has been modified by ZnSe to form a composite nanostructures in the nanoscale range. The electrochemical properties of the prepared materials were studied by cyclic voltammetry, which revealed that the synthesized material exhibited remarkable electrochemical supercapacitive activity. Moreover, the composite nanostructures showed excellent photocatalytic activity for degradation of phenol and almost 93% of phenol was degraded with good recyclability and stability. According to The International Commission on Illumination (CIE), the synthesized nanomaterial shows blue emission and is suitable for blue LEDs.

Facile synthesis of β-Ga2O3 based high-performance electronic devices via direct oxidation of solution-processed transition metal dichalcogenides

“…As seen, the FWHM values were reduced compared with before annealing, confirming that the crystal quality and size of the β-Ga 2 O 3 was enhanced. This can be validated based on the Debye-Scherrer formula (equation S1), wherein narrower FWHM values correspond to larger crystallite size [31]. It was proven that the structural quality of the gallium oxide synthesized in this study was greatly improved because of the annealing condition process applied to the sample similar to the evidence found in the previous study [27].…”

Fabrication of a Sm2O3/In2S3 photocatalyst for boosting ciprofloxacin oxidation and the Cr(vi) reduction: process parameters and degradation mechanism

“…43 When the electrons and holes are surrounded in the surface states, the nonlinear overlaps of charge carriers are reduced, and their recombination is further inhibited due to the localized nature of the surface area. 32,44 Furthermore, the pore diameter of the samples is also exhibited in Fig. S4b, † which implies that the average pore diameter center is found at about 2-5 nm and ensures that the considerable pore diameter could be more feasible for the mass transfer and diffusion of reaction substances, resulting in remarkable catalytic oxidation.…”

“…43 When the electrons and holes are surrounded in the surface states, the nonlinear overlaps of charge carriers are reduced, and their recombination is further inhibited due to the localized nature of the surface area. 32,44…”

Exploring the photocatalytic degradation of organic textile dye using hydrothermally synthesized Ce-doped metal chalcogenide nanomaterial

“…The mixture was then put into a Teflon-lined stainless steel hydrothermal autoclave after being stirred for 15 min, sealed and maintained at 180 • C for 6 h in hot air oven. After the reaction conditions were fulfilled, the autoclave was taken out from oven and cooled down at room temperature on its own [27]. The obtained black sediment was filtered using whatman filter paper, washed four times with distilled water and absolute ethanol, and finally dried at 70 • C in an oven and named as FS sample for future use in literature.…”

“…Impedance is measured in units of resistance (Ω) and represents the strength that opposes electrical flow. EIS spectra were plotted using the actual portion (Z) versus the fictional part (Z) of the impedance, which chooses the interphase resistance between the functional cathode and the electrolyte [27]. When compared with base sample (FeSe 2 ), its doped-composite samples depicted a smaller semi-circle.…”