Comparative Study on the Photocatalytic Degradation of Paraquat Using Tungsten-Doped TiO2 Under UV and Sunlight

Current Developments in the Effective Removal of Environmental Pollutants through Photocatalytic Degradation Using Nanomaterials

“…Supporting this, Kaur et al ( 2019) [55] study the photocatalytic degradation of DEP using transition-metal-doped (Ni, Mn, and Co) TiO2 nanoparticles based on their degradation rate; they recommend Mn-doped TiO2 as an ideal catalyst, as it requires minimal excitation energy (visible light activation), owing to the lowest optical band gap being 2.47 eV. Moreover, this study concludes that doped TiO2 catalysts perform well when compared to their undoped counterparts [55]. Likewise, Akbari-Adergani et al (2018) [56] suggest another set of transition metals (Fe, Ag, and Co), doped in ZnO, as an effective Numerous methods were suggested by different researchers, with the aim of remediating this toxic organic chemical; however, photocatalytic degradation is considered the optimum, as the catalysts provide alternative charge transfer pathways, instead of electron-hole pair recombination, and increase the surface area for adsorption.…”

“…Likewise, Akbari-Adergani et al (2018) [56] suggest another set of transition metals (Fe, Ag, and Co), doped in ZnO, as an effective Numerous methods were suggested by different researchers, with the aim of remediating this toxic organic chemical; however, photocatalytic degradation is considered the optimum, as the catalysts provide alternative charge transfer pathways, instead of electron-hole pair recombination, and increase the surface area for adsorption. Supporting this, Kaur et al ( 2019) [55] study the photocatalytic degradation of DEP using transitionmetal-doped (Ni, Mn, and Co) TiO 2 nanoparticles based on their degradation rate; they recommend Mn-doped TiO 2 as an ideal catalyst, as it requires minimal excitation energy (visible light activation), owing to the lowest optical band gap being 2.47 eV. Moreover, this study concludes that doped TiO 2 catalysts perform well when compared to their undoped counterparts [55].…”

Biomass-derived graphene modified γ-Fe2O3/N,Fe–TiO2@GO: a prolific photoactive material with extended visible to near IR harvesting

“…The increasing initial concentration of the synthetic wastewater indicated a negative effect on COD reduction due to the screening effect resulting in the decrease in the generation of ˙OH radicals and another possible reason for the decrease in the COD reduction could be the formation of transient intermediates that interfered with the degradation pathway. 41 In addition to this, the pH of the solution also affected the COD, as at extremely acidic pH, only 46% of the COD reduction was achieved. Further, increasing H 2 O 2 concentration reduces the rate of electron–hole recombination, and capturing of electrons, and also aids in photo-oxidation, resulting in enhanced COD reduction.…”