Preparation of WO3 Nanoparticles Using Cetyl Trimethyl Ammonium Bromide Supermolecular Template

Abstract

Problem statement: WO 3 is one of the most interested metal oxides because of its application as catalysts, sensors, electrochromic devices, ceramic, solar cell, pigments and so on. More investigation is needed to find the good and low cost method for preparation of WO 3 nanoparticles with uniform morphology and narrow distribution using a surfactant mediated method. Approach: In this study, the synthesis of WO 3 nanoparticles was accomplished using a cationic surfactant (cetyl trimethyl ammonium bromide) as the organic supermolecular template and WCl 6 and NH 4 OH as the inorganic precursor and counter ion source, respectively. The effects of reaction temperature and surfactant concentration in particle size of resultant WO 3 nanoparticles were investigated. Results: The different ranges of particle size and size distribution were obtained using different surfactant concentration and reaction temperature. The WO 3 particles in the nanometer range (3-15 nm) with uniform morphology and narrow distribution were obtained by optimization of reaction condition. Xray diffraction, transmission electron microscopy, variable pressure scanning electron microscope, Xray photoelectron spectroscopy and UV-Vis spectroscopy were used to characterize the final products. The nanomaterials WO 3 showed different pattern in UV-Vis spectroscopy compare to the bulk WO 3 . Conclusion: A relatively simple and effective procedure for synthesis of WO 3 nanoparticles with mean size below 10 nm, narrow size distribution and high monodispersity using CTAB supramolecular template had been developed and optimized.

Enhanced Catalyst Activity of WO3 Using Polypyrrole as Support for Acidic Esterification of Glycerol with Acetic Acid

“…It can be resolved into three components, namely, as terminal oxygen (=O), the linkage oxygen (-O-), and the peak fitted around 533 eV which is assumed to come from humidity in ambience or -OH group. The photoelectron peak of the W4f region in nanocomposite showed a wellresolved double peak due to W4f 7/2 and W4f 5/2 components with Δ ≈ 2.1 eV which is in good agreement with reference and revealed the presence of tungsten in W 6+ state and oxide form in compound [41]. The peak at around 399.0 eV is attributed to the N1s which comes from polypyrrole.…”

“…Micelle does not only provide a favourable site for the growth of the particulate assemblies but also influences the formation progress including nucleation, growth, coagulation, and flocculation. The surfactant-assisted method is an effective process to prepare size controllable nanocrystals, which is a simple, convenient, and low-cost process [41].…”

Influence of Zn doping on structural, optical and photocatalytic activity of WO3 nanoparticles by a novel microwave irradiation technique

“…WO 3 , an n-type semiconductor with an excellent electrochromic, photochromic and gasochromic properties has been extensively used in variety of applications, including gas and temperature sensing, catalysis, electrochromic windows and displays, flat panel displays, solar energy devices and so on [3]. Many processes have been developed for the synthesis of WO 3 nanostructures, e.g., hydrothermal route [4], surfactant mediated method [5] sol-gel [6], chemical co precipitation [7], acidification method [8], and electrodeposition method [9]. Compared with the above processes, the microwave method has sparked much interest due to their operation simplicity, effective, low-cost route to synthesis, less time consuming (about 10 min), and for large-scale production [10].…”

Effect of N-rGO Decoration on the Structure and Optical Properties of WO3 Nanoplates

“…32 WO 3 has several crystalline structures (triclinic, monoclinic, orthorhombic, tetragonal, hexagonal, and cubic). Researchers have prepared nanowires, [33][34][35] nanorods, 28,[36][37][38][39] nanoparticles, 40 and nanofibers 41,42 of WO 3 . Nanocomposites have attracted much attention as a class of nanomaterials for scientific research and technological applications such as TiO 2 /WO 3 , [43][44][45][46][47] CuO/WO 3 , 48 MO 3 -WO 3 , 49 and WO 3 /Graphene.…”