Soft chemical synthesis and characterization of BaWO4 nanoparticles for photocatalytic removal of Rhodamine B present in water sample

Abstract

In recent years, the use of metal oxides as photocatalysts for degradation of organic substances has attracted the attention of the scientific community. Metal oxide nanoparticles have been studied due to their novel optical, electronic, magnetic, thermal and potential applications as catalysts, gas sensors, photo-electronic devices, etc. In this research work, we report a simple, soft chemical route for synthesizing BaWO 4 nanoparticles using cheap chemicals such as barium nitrate (precursor salt) and sodium tungstate (precipitating agent). The final product was dried at room temperature overnight and calcined at 400°C and 800°C for 2 h to get phase-pure product. The prepared nanoparticles (as prepared and heat-treated samples) were characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis and UV-Vis spectroscopy techniques. Photocatalytic degradation characteristics of Rhodamine B in water using BaWO 4 nanoparticles were studied and reported.

High-Pressure Low-Temperature Optical Studies of BaWO4:Ce,Na Crystals

“…The temperature dependence of the band gap energy is plotted in Figure 3b. Although there are different data on the band gap energy of BaWO 4 available in the literature, 15,20,46,67 our results are in good agreement with the recent estimation of this value. 30 The temperature dependence of E g was fitted using the Varshni equation, 68 modified by O'Donnell and Chen 69 to account for electron−phonon coupling:…”

“…The temperature dependence of the band gap energy is plotted in Figure b. Although there are different data on the band gap energy of BaWO 4 available in the literature, ,,, our results are in good agreement with the recent estimation of this value …”

Nanostructured Ternary Metal Tungstate-Based Photocatalysts for Environmental Purification and Solar Water Splitting: A Review

“…2 [ 57 ]. During the past few decades, MWO 4 with large radii cations, including CaWO 4 [ 58 , 59 ], BaWO 4 [ 60 , 61 ], PbWO 4 [ 62 ], and SrWO 4 [ 63 ], has been prepared using different synthesis approaches. However, the band gaps of these MWO 4 photocatalysts are much larger than that of TiO 2 and are not suitable for practical photocatalytic applications.…”

Structure and Photoluminescence Properties of Rare-Earth (Dy3+, Tb3+, Sm3+)-Doped BaWO4 Phosphors Synthesized via Co-Precipitation for Anti-Counterfeiting

“…Inorganic phosphors have distinguished properties such as high luminescence intensity, sustainability, and inertness under sunlight. BaWO 4 has been regarded as a promising candidate for fluorescence anti-counterfeiting materials among a variety of inorganic phosphors that meet these points [11][12][13][14][15]. Many studies have been performed to develop synthesized BaWO 4, using various techniques such as solid-state reaction [16,17], Czochralski crystal growth [18,19], cell electrochemical technique [20], and polymeric precursor method [21].…”