Search

Pristine and Mn-TiO 2 photocatalysts was prepared employing sophisticated hydrothermal technique. TiO 2 , 0.2 M, 0.4 M Mn-TiO 2 photocatalysts analysis were done by using standard characterization studies. The morphology of the pure TiO 2 photocatalyst showed the large agglomeration of nanoparticles. While the dopant Mn ions influenced higher on host lattice TiO 2 . The 0.2 M Mn added TiO 2 photocatalyst showed no agglomeration and nanoparticles size were decreased. On increasing dopant level, there is growth of nanorods along with nanoparticles which greatly helped in dye degradation. The prepared photocatalysts photocatalytic action was investigated on reducing MG dye. Prepared photocatalyst added dye mixtures were exposed under visible light and collected for every 15 min. 0.4 M Mn-TiO 2 - MG sample showed 96% efficiency on degrading MG dye. The dopant has increased electrons and holes recombination on host surface. 0.4 M Mn-TiO 2 -MG sample rate constant was higher than other samples and reaction system abide by Pseudo first order kinetics. 0.4 M Mn-TiO 2 photocatalyst be an efficient and enthusiastic potential material to remove organic pollutants., (Copyright © 2022 Elsevier Ltd. All rights reserved.)

Pristine and Ce doped TiO 2 nanoparticles were fabricated for toxic pollutants removal from wastewater. Pristine, 2% Ce and 4% Ce doped TiO 2 photocatalysts were produced via hydrothermal route. 4% Ce doped TiO 2 exhibited 2.41 eV bandgap which is smaller than pure TiO 2. The morphology was also investigated and it was established that doping of Ce ions enhanced the surface roughness and reduced the particle size. The surface area was characterized through BET analysis and 4% Ce-TiO 2 possess higher surface with large pore diameter which helped the photocatalytic activity. The prepared photocatalysts were investigated on reduction of pollutants from wastewater under visible light. Higher efficiency was obtained for 4% Ce-TiO 2 photocatalyst for both model pollutants. The "k" value possessed was also higher for the doped TiO 2 catalyst. These analysis reports the optimum level of ceria doping to enhance morphology, surface area and it increased activity than bare TiO 2 . 4% Ce-TiO 2 will be the potential candidate for efficient wastewater management. The 4% Ce doped TiO 2 photocatalyst provided 77% and 88% on reducing MB and RhB dyes. The dopant has developed higher surface area, morphology and good recombination rate which reduced the toxic pollutants and changed the wastewater to reuse., (Copyright © 2022 Elsevier Ltd. All rights reserved.)

Pristine and polyethylene glycol assisted antimony tungstate (Sb 2 WO 6 ) was developed via hydrothermal route. The pristine and surfactant assisted Sb 2 WO 6 were further exemplified to reveal the properties of the samples. The bandgap calculated for Sb 2 WO 6 , 5 ml PEG- Sb 2 WO 6 , 10 ml PEG- Sb 2 WO 6 was 2.78 eV, 2.66 eV and 2.21 eV. The 10 ml PEG assisted sample exhibited narrow bandgap. The Fourier transform infrared spectroscopy (FTIR) spectra of the samples showed metal vibrations and stretching of the water molecules adsorbed. The Raman spectra showed the vibrational modes present in Sb 2 WO 6 . The morphology was analyzed employing transmission electron microscope (TEM) for all samples. Pristine Sb 2 WO 6 showed growth of nanorods with higher dimensions with high agglomeration. 5 ml PEG- Sb 2 WO 6 showed the growth of nanorods with lesser agglomeration. 10 ml PEG assisted Sb 2 WO 6 exhibited distinct growth of nanorods with no agglomeration on the surface. The elemental composition was examined employing X-ray Photoelectron Spectroscopy. Prepared product photocatalytic behaviour was tested employing Rhodamine B dye degrading. Different catalyst loading were investigated for degrading the toxic pollutants. 0.2 g 10 ml PEG-Sb 2 WO 6 showed 81% efficiency on degrading the toxic pollutant from wastewater. The OH radicals are accountable for photocatalytic behaviour of prepared photocatalyst. The 10 ml PEG-Sb 2 WO 6 has the good reusability behavior and stable properties after three cycles. The prepared 10 ml PEG- Sb 2 WO 6 photocatalyst will be the potential candidate for the remediation of the water treatment., (Copyright © 2021 Elsevier Ltd. All rights reserved.)

A facile synthesis of pristine and g-C 3 N 4 loaded CdWO 4 (Cadmium Tungstate) were reported and analyzed the effect of pollutants removal in wastewater. The samples were characterized and the morphology of the pristine sample showed the nanostructures with high cluster of layer formed. While adding PEG (Polyethylene glycol), the surface has exhibited less agglomeration and in g-C 3 N 4 added sample the agglomeration was intensely reduced and nanostructures have been clearly found. Photocatalytic performance on cationic dye was investigated under visible light. The efficiency calculated for g-C 3 N 4 - CdWO 4 sample was 85% for MB. The C/C 0 plot gives better degradation. The kinetic study revealed pseudo first order reaction. The g-C 3 N 4 -CdWO 4 sample exhibited higher "k" value which proved best efficiency on removing the pollutant. g-C 3 N 4 -CdWO 4 sample will make better reduction on toxic pollutants and be a good candidate in futuristic applications. By carbon based derivates inclusion with photo active materials, the morphology and surface area was greatly improved and it enhances activity of host material and it will be the promising material for industrial applications., (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Wastewater remediation is one of the special issues that have been discussed in recent years and one of the main pollutants was dyes which totally changes the water behavior. To eradicate the organic compounds from the wastewater and reuse it, there are numerous steps have been taken into consideration. Dye degradation via photocatalysis is one of the promising technique with good efficiency. Pure and tin (Sn) doped Co 3 O 4 was prepared employing co-precipitation technique. The structural, vibrational, optical and morphological analysis was done employing X-ray diffraction studies, Photoluminescence, Raman analysis and Scanning Electron Microscopic (SEM) studies. The well-defined nanoparticles were grown with 1 M Sn doped Co 3 O 4 . The photocatalytic activities of methylene blue dye under visible light were investigated by adding the samples (CS-1, CS-2, CS-3). 1 M Sn doped Co 3 O 4 sample showed 75% efficiency towards dye degradation. The prepared 1 M Sn doped Co 3 O 4 sample will be the best for photocatalytic activity. By doping Sn atoms the efficiency of the host is increased which will be the most promising candidate for the photocatalytic dye degradation applications., (Copyright © 2021 Elsevier Ltd. All rights reserved.)