Journal of Sol-Gel Science and Technology, Jan 4, 2022
Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystallin... more Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystalline quality and specific surface area of the nanoparticles. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by a simple and low-cost hydrothermal method for the degradation of organic pollutants in wastewater. X-ray diffraction analysis (XRD) revealed the formation of hexagonal and cubic crystalline-structure phases for ZnO and BaO nanoneedles, with an average crystallite size ranging from 28–31 nm. Sphere-like morphology for the synthesized NCs was evident from the SEM analysis. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency of 97% in 40 min, 96% and 93% in 90 min under UV light irradiation; and 97% in 60 min, 95% in 90 min, and 50% in 120 min under visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG) and methyl orange (MO), respectively. Moreover, they showed efficient rate constants of about 25 × 10 −3 min −1 , 23 × 10 −3 min −1 , and 5 × 10 −3 min −1 for MB, MG, and MO, respectively. These NCs effectively inactivated pathogenic bacteria, namely S. aureus and E. coli , by cell wall destruction with a zone of inhibition of about 6 mm and 7 mm, respectively even with small volumes of NC solutions (75 μl). Hence this study suggests that ZnO/BaO NCs can provide an efficient way toward the best pollutant degradation system commercially. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by hydrothermal method. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency under UV light irradiation and visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG), and methyl orange (MO), respectively. ZnO/BaO NCs effectively inactivated pathogenic bacteria, namely S . aureus and E . coli , by cell wall destruction with a zone of inhibition of about 6 mm and 7 mm, respectively, even with small volumes of NC solutions (75 μl).
Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystallin... more Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystalline quality and specific surface area of the nanoparticles. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by a simple and low-cost hydrothermal method for the degradation of organic pollutants in wastewater. X-ray diffraction analysis (XRD) revealed the formation of hexagonal and cubic crystalline-structure phases for ZnO and BaO nanoneedles, with an average crystallite size ranging from 28–31 nm. Sphere-like morphology for the synthesized NCs was evident from the SEM analysis. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency of 97% in 40 min, 96% and 93% in 90 min under UV light irradiation; and 97% in 60 min, 95% in 90 min, and 50% in 120 min under visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG) and methyl orange (MO), respectively. Moreover, they showed efficient rate constants of about 25 × 10 −3 min −1 , 23 × 10 −3 min −1 , and 5 × 10 −3 min −1 for MB, MG, and MO, respectively. These NCs effectively inactivated pathogenic bacteria, namely S. aureus and E. coli , by cell wall destruction with a zone of inhibition of about 6 mm and 7 mm, respectively even with small volumes of NC solutions (75 μl). Hence this study suggests that ZnO/BaO NCs can provide an efficient way toward the best pollutant degradation system commercially. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by hydrothermal method. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency under UV light irradiation and visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG), and methyl orange (MO), respectively. ZnO/BaO NCs effectively inactivated pathogenic bacteria, namely S . aureus and E . coli , by cell wall destruction with a zone of inhibition of about 6 mm and 7 mm, respectively, even with small volumes of NC solutions (75 μl).
Journal of Inorganic and Organometallic Polymers and Materials
Engineering efficient, strong and cost-effective nanoparticles with strong inhibitory activities ... more Engineering efficient, strong and cost-effective nanoparticles with strong inhibitory activities are the growing need at present. Using the strategies of doping, Zinc oxide/Silver nanocomposites (ZnO/Ag NCs) namely 0.9 M ZnO: 0.1 M Ag, 0.7 M ZnO: 0.3 M Ag and 0.5 M ZnO: 0.5 M Ag were synthesized hydrothermally. The average crystallite sizes for the ZnO/Ag NCs were 31 nm, 29 nm and 23 nm. The band gap energy (Eg) for the ZnO/Ag NCs was estimated to be 3.09 eV, 3.12 eV and 3.18 eV using Tauc’s plot. Grain-like morphological images was observed in the Scanning Electron Microscopy (SEM), which helps in effective promotion of degrading methyl orange (MO), methylene blue (MB) and crystal violet (CV) under visible light irradiation with a rate constant of 5 × 10–3/min, 16.6 × 10–3/min and 4 × 10–3/min respectively. This superior photocatalytic decomposition of dye are ascribed to smaller particle size, high surface area, the ability to absorb visible light and the efficient charge separation associated with the synergetic effects of appropriate amounts of ZnO and Ag in the prepared samples. In addition, the antibacterial efficacy of the NCs is observed as 90 and 100% for 75 μl. These hydrothermally synthesized synergistic NCs can be designed for large-scale fabrication of NC materials for potential applications in photocatalytic and antibacterial activity.
Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystallin... more Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystalline quality and specific surface area of the nanoparticles. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by a simple and low-cost hydrothermal method for the degradation of organic pollutants in wastewater. X-ray diffraction analysis (XRD) revealed the formation of hexagonal and cubic crystalline-structure phases for ZnO and BaO nanoneedles, with an average crystallite size ranging from 28–31 nm. Sphere-like morphology for the synthesized NCs was evident from the SEM analysis. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency of 97% in 40 min, 96% and 93% in 90 min under UV light irradiation; and 97% in 60 min, 95% in 90 min, and 50% in 120 min under visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG) and methyl orange (MO), respectively. Mo...
Journal of Sol-Gel Science and Technology, Jan 4, 2022
Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystallin... more Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystalline quality and specific surface area of the nanoparticles. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by a simple and low-cost hydrothermal method for the degradation of organic pollutants in wastewater. X-ray diffraction analysis (XRD) revealed the formation of hexagonal and cubic crystalline-structure phases for ZnO and BaO nanoneedles, with an average crystallite size ranging from 28–31 nm. Sphere-like morphology for the synthesized NCs was evident from the SEM analysis. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency of 97% in 40 min, 96% and 93% in 90 min under UV light irradiation; and 97% in 60 min, 95% in 90 min, and 50% in 120 min under visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG) and methyl orange (MO), respectively. Moreover, they showed efficient rate constants of about 25 × 10 −3 min −1 , 23 × 10 −3 min −1 , and 5 × 10 −3 min −1 for MB, MG, and MO, respectively. These NCs effectively inactivated pathogenic bacteria, namely S. aureus and E. coli , by cell wall destruction with a zone of inhibition of about 6 mm and 7 mm, respectively even with small volumes of NC solutions (75 μl). Hence this study suggests that ZnO/BaO NCs can provide an efficient way toward the best pollutant degradation system commercially. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by hydrothermal method. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency under UV light irradiation and visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG), and methyl orange (MO), respectively. ZnO/BaO NCs effectively inactivated pathogenic bacteria, namely S . aureus and E . coli , by cell wall destruction with a zone of inhibition of about 6 mm and 7 mm, respectively, even with small volumes of NC solutions (75 μl).
Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystallin... more Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystalline quality and specific surface area of the nanoparticles. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by a simple and low-cost hydrothermal method for the degradation of organic pollutants in wastewater. X-ray diffraction analysis (XRD) revealed the formation of hexagonal and cubic crystalline-structure phases for ZnO and BaO nanoneedles, with an average crystallite size ranging from 28–31 nm. Sphere-like morphology for the synthesized NCs was evident from the SEM analysis. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency of 97% in 40 min, 96% and 93% in 90 min under UV light irradiation; and 97% in 60 min, 95% in 90 min, and 50% in 120 min under visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG) and methyl orange (MO), respectively. Moreover, they showed efficient rate constants of about 25 × 10 −3 min −1 , 23 × 10 −3 min −1 , and 5 × 10 −3 min −1 for MB, MG, and MO, respectively. These NCs effectively inactivated pathogenic bacteria, namely S. aureus and E. coli , by cell wall destruction with a zone of inhibition of about 6 mm and 7 mm, respectively even with small volumes of NC solutions (75 μl). Hence this study suggests that ZnO/BaO NCs can provide an efficient way toward the best pollutant degradation system commercially. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by hydrothermal method. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency under UV light irradiation and visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG), and methyl orange (MO), respectively. ZnO/BaO NCs effectively inactivated pathogenic bacteria, namely S . aureus and E . coli , by cell wall destruction with a zone of inhibition of about 6 mm and 7 mm, respectively, even with small volumes of NC solutions (75 μl).
Journal of Inorganic and Organometallic Polymers and Materials
Engineering efficient, strong and cost-effective nanoparticles with strong inhibitory activities ... more Engineering efficient, strong and cost-effective nanoparticles with strong inhibitory activities are the growing need at present. Using the strategies of doping, Zinc oxide/Silver nanocomposites (ZnO/Ag NCs) namely 0.9 M ZnO: 0.1 M Ag, 0.7 M ZnO: 0.3 M Ag and 0.5 M ZnO: 0.5 M Ag were synthesized hydrothermally. The average crystallite sizes for the ZnO/Ag NCs were 31 nm, 29 nm and 23 nm. The band gap energy (Eg) for the ZnO/Ag NCs was estimated to be 3.09 eV, 3.12 eV and 3.18 eV using Tauc’s plot. Grain-like morphological images was observed in the Scanning Electron Microscopy (SEM), which helps in effective promotion of degrading methyl orange (MO), methylene blue (MB) and crystal violet (CV) under visible light irradiation with a rate constant of 5 × 10–3/min, 16.6 × 10–3/min and 4 × 10–3/min respectively. This superior photocatalytic decomposition of dye are ascribed to smaller particle size, high surface area, the ability to absorb visible light and the efficient charge separation associated with the synergetic effects of appropriate amounts of ZnO and Ag in the prepared samples. In addition, the antibacterial efficacy of the NCs is observed as 90 and 100% for 75 μl. These hydrothermally synthesized synergistic NCs can be designed for large-scale fabrication of NC materials for potential applications in photocatalytic and antibacterial activity.
Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystallin... more Photocatalysis is a photochemical advanced oxidation process (AOP) that depends on the crystalline quality and specific surface area of the nanoparticles. Heterogeneous photocatalysts zinc oxide/barium oxide nanocomposites (ZnO/BaO NCs) were synthesized by a simple and low-cost hydrothermal method for the degradation of organic pollutants in wastewater. X-ray diffraction analysis (XRD) revealed the formation of hexagonal and cubic crystalline-structure phases for ZnO and BaO nanoneedles, with an average crystallite size ranging from 28–31 nm. Sphere-like morphology for the synthesized NCs was evident from the SEM analysis. BaO in ZnO significantly enhances the photocatalytic performance of ZnO with high degradation efficiency of 97% in 40 min, 96% and 93% in 90 min under UV light irradiation; and 97% in 60 min, 95% in 90 min, and 50% in 120 min under visible light irradiation for the decolorization of methylene blue (MB), malachite green (MG) and methyl orange (MO), respectively. Mo...
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Papers by Bhaviya Raj