Effects of CdS Nanoparticles on the Physical Properties of T-CdS Nanocomposite Materials
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Effects of CdS Nanoparticles on the Physical Properties of T-CdS Nanocomposite Materials Norah Alonizan1,2 Received: 14 July 2020 / Accepted: 20 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this work, has been studied the effects of CdS nanoparticles at different concentrations on the microstructure and optical properties of T iO2/CdS nanocomposites (T-CdS). The structural properties of T-CdS samples were characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM). XRD analysis confirms the hexagonal wurtzite phase structure of CdS nanoparticles and the tetragonal anatase phase of T iO2 nanoparticles. TEM images appear the shapes and sizes of TiO2, CdS nanoparticles and T-CdS nanocomposite, where found in aggregates nanoparticles their sizes from 15 to 56 nm. By UV–vis diffuse reflectance spectrum (DRS) were determined Band-gap energies of the samples. The Photoluminescence (PL) analysis exposed, with the excitation wavelength of 285 nm, our samples exhibited the intensity of peak at 426 nm. Additionally, the FTIR spectroscopy of the samples exhibits the presence of functional groups. The thermal stability of T-CdS nanocomposite samples were determined by thermogravimetric and differential thermal analysis. Keywords Titanium dioxide (TiO2) · T-CdS · Nanocomposites · Photoluminescence · Optical properties
1 Introduction In the current societal context of an increasing energy demand associated with a depletion of fossil resources, it becomes urgent to find sources, alternative energy sources, ecologically and economically viable [1, 2]. The major challenge is to find new ways to produce clean energy to meet global consumption. The direct conversion of solar energy into an energy vector (fuel), storable and usable at will, appears as an interesting alternative [3]. For several decades, the photo-induced properties of TiO2, preferably in its polymorphic anatase form, have been the subject of great interest for numerous applications. By for example, its photocatalytic properties make it possible to purify and decontaminate air or water under UV exposure [4, 5]. The CdS/TiO2 nanoparticles exhibited superior * Norah Alonizan [email protected] 1
Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
2
photocatalytic activity, so used it as a photocatalyst for simulated hospital wastewater, where observed reduced 48.5% of TOC when used CdS/TiO2 (0.45 g/L) in 270 min under visible light [6]. With the growing interest in nanostructured materials, in titanium dioxide nanoparticles, many syntheses have been published in recent years. Depending on the type of synthesis and parameters used during these, it is possible to synthesize many materials with specific characteristics and properties. Here is a non-exhaustive list of more or less
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