Band Gap Tuning of Zinc Oxide Nanoparticles by the Addition of (1-4%) Strontium. Synthesis, Characterization of the Catalyst and Its Use for the Photocatalytic Degradation of Acid Violet-17 Dye in Aqueous Solution

Jan, Fazal Akbar; Ullah, Rahat; Shah, Umar; Saleem, Muhammad; Ullah, Naimat

doi:10.30638/eemj.2020.193

Cited by 7 publications

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“…Bands appearing between 1000 and 1700 cm –1 were assigned to organic traces (residue). The Zn–O stretching mode represents the characteristic peak ranging from 400 to 900 cm –1 . The appearance and the shift of peaks in st-ZnO QDs indicate the formation of a bond between starch and ZnO molecules; meanwhile, no covalent bond in ZnO and the st molecule was formed, as validated by earlier research .…”

Section: Resultssupporting

confidence: 66%

“…The Zn–O stretching mode represents the characteristic peak ranging from 400 to 900 cm –1 . 50 The appearance and the shift of peaks in st-ZnO QDs indicate the formation of a bond between starch and ZnO molecules; meanwhile, no covalent bond in ZnO and the st molecule was formed, as validated by earlier research. 51 The IR bands detected at 835 and 624 cm –1 were attributed to vibrational modes of the Nb–ZnO structure, demonstrating the integration of Nb into the ZnO lattice.…”

Section: Resultssupporting

confidence: 60%

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Nb/Starch-Doped ZnO Nanostructures for Polluted Water Treatment and Antimicrobial Applications: Molecular Docking Analysis

et al. 2022

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Nb/starch-doped ZnO quantum dots (QDs) were prepared by a coprecipitation route. A fixed quantity of starch (st) and different concentrations (2 and 4%) of niobium (Nb) were doped in a ZnO lattice. To gain a better understanding of synthesized nanostructures, a systematic study was carried out utilizing several characterization methods. The goal of this research was to undertake methylene blue (MB) dye degradation with a synthetic material and also study its antibacterial properties. The phase structure, morphology, functional groups, optical properties, and elemental compositions of synthesized samples were investigated. Our study showed that ZnO QDs enhanced photocatalytic activity (PCA), resulting in effective MB degradation, in addition to showing good antimicrobial activity against Gram-negative relative to Gram-positive bacteria. Molecular docking study findings were in good agreement with the observed in vitro bactericidal potential and suggested ZnO, st-ZnO, and Nb/st-ZnO as possible inhibitors against dihydrofolate reductase (DHFRE. coli) and DNA gyraseE. coli.

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Section: Resultssupporting

confidence: 66%

Section: Resultssupporting

confidence: 60%

Nb/Starch-Doped ZnO Nanostructures for Polluted Water Treatment and Antimicrobial Applications: Molecular Docking Analysis

et al. 2022

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“…Catalyst loading is a critical factor in achieving a successful photocatalytic degradation process. The number of active sites on the catalyst surface grows as the amount of the catalyst increases, resulting in an increase in the number of hydroxyl and superoxide radicals [43]. The degradation of 20 ppm of Safranin O using TiO 2 and Ho-TiO 2 under UV irradiation for a time interval of 180 min was explored in the present work to better understand the relationship between photodegradation efficiency and catalyst loading.…”

Section: Effect Of Catalysts Loadingmentioning

confidence: 99%

An investigation into the environmental and therapeutic applications of holmium-doped titanium dioxide (Ho-TiO₂) nanocatalysts: a kinetic and thermodynamic study of the photocatalytic degradation of Safranin O dye

Jan¹,

Ullah²,

Ullah³

et al. 2022

Nano Futures

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Titanium dioxide (TiO2) and Holmium doped Titanium dioxide(Ho-TiO2) nanoparticles (NPs) were synthesized through Sol Gel method. The synthesized NPs were characterized by UV-Vis spectroscopy, X-ray diffraction (XRD), Energy dispersive X-ray analysis (EDX), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Photoluminescence spectroscopy. DNA binding, antibacterial, hemolytic and antioxidant assays of the synthesized nanoparticles were also carried out for finding their therapeutic applications. Successful doping of TiO2 with Ho reduced the band gap from 3.10 to 2.88 eV. SEM and XRD analysis showed that both TiO2 and Ho-TiO2 NPs exhibit tetragonal structure and as a result of doping the morphology of the particles improved and agglomeration reduced. PL emission intensity of TiO2 also reduced with doping.The holmium doped TiO2 were used for the first time against the degradation of safranin O dye, DNA binding study and biocompatibility assay.The degradation of Safranin Odye over both the catalysts followed first order kinetics. The calculated activation energies for the photo degradation of given dye were found to be 51.7 and 35.2kJ/mol using TiO2 and Ho-TiO2 NPs respectively. At 180 minutes time interval 84% and 87 % dye degradation was observed using pure TiO2 and Ho-TiO2 NPs respectively. High percent degradation of dye was found at low concentration (20ppm) and at optimal dosage (0.035g) of both the catalysts. The rate of Safranin O dye degradation was found to increase with increase in temperature and pH of the medium. DNA binding study revealed that Ho-TiO2 NPs are more capable of binding to human DNA. Antibacterial activity study showed that Ho-TiO2 NPs were more efficient against both gram-negative and gram-positive bacterial strains as compared to pure TiO2. Hemolysis assay showed that TiO2 and Ho-TiO2 nanoparticles are non-biocompatible.Ho-TiO2 nanoparticles showed higher anti-oxidant activity as compared to bare TiO2.

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“…4,5 Among different industries textiles and dyeing industries are the main contributors that pollute surface as well as underground water. 6 Specifically, during the dyeing process some of the dye stick with the fabric clothes while a major portion is washed out that ultimately raise the concentration of dyes in water. The color of dyes that is present in water is stable, persistent, toxic, fast and inhibitory.…”

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confidence: 99%

Tin Decorated Zinc Sulphide Nanoparticles for Photocatalytic Degradation of Bromophenol Blue Dye and Their Therapeutic Applications: A Kinetic and Thermodynamic Approach

Shah

Jan

Ullah

et al. 2022

ECS J. Solid State Sci. Technol.

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Zinc sulphide (ZnS) and Tin-doped Zinc sulphide (Sn-ZnS) nanoparticles (NPs) were synthesized by co precipitation method. The produced NPs were characterized using UV-Vis spectroscopy, XRD, EDX,SEM, FTIR, TGA and Photoluminescence (PL) spectroscopy. With the addition of 3% Sn the band gap of ZnS reduced from 3.50 to 3.10 eV. TGA study revealed that synthesized NPs are very stable to temperature and the total weight loss was only 22.8% and 21.5% in ZnS and Sn-ZnS nanocatalyst. The photoluminescence (PL) intensity showed that with Tin-doping the peak in Sn-ZnS shifted to longer wavelength. The degradation of Bromophenol blue over both catalysts followed first order kinetics. The activation energy calculated for the photodegradation reaction was 53.2 and 67.55 kj/mol using pure ZnS and Sn-ZnS NPs, respectively. About 86% and 96% dye degradation was noticed in 300 minutes. A high percentage of dye degradation was found at low concentration (10 ppm) and at optimal dosage (0.03 g) of the catalyst. The rate of Bromophenol blue dye degradation was found to increase with increase in temperature (up to 70°C) and pH (9.5) of the medium. Sn-ZnS NPs showed good antibacterial and antioxidant activities compared to bare ZnS. Both nanoparticles are found to be non biocompatible.

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Band Gap Tuning of Zinc Oxide Nanoparticles by the Addition of (1-4%) Strontium. Synthesis, Characterization of the Catalyst and Its Use for the Photocatalytic Degradation of Acid Violet-17 Dye in Aqueous Solution

Cited by 7 publications

References 0 publications

Nb/Starch-Doped ZnO Nanostructures for Polluted Water Treatment and Antimicrobial Applications: Molecular Docking Analysis

Nb/Starch-Doped ZnO Nanostructures for Polluted Water Treatment and Antimicrobial Applications: Molecular Docking Analysis

An investigation into the environmental and therapeutic applications of holmium-doped titanium dioxide (Ho-TiO₂) nanocatalysts: a kinetic and thermodynamic study of the photocatalytic degradation of Safranin O dye

Tin Decorated Zinc Sulphide Nanoparticles for Photocatalytic Degradation of Bromophenol Blue Dye and Their Therapeutic Applications: A Kinetic and Thermodynamic Approach

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Band Gap Tuning of Zinc Oxide Nanoparticles by the Addition of (1-4%) Strontium. Synthesis, Characterization of the Catalyst and Its Use for the Photocatalytic Degradation of Acid Violet-17 Dye in Aqueous Solution

Cited by 7 publications

References 0 publications

Nb/Starch-Doped ZnO Nanostructures for Polluted Water Treatment and Antimicrobial Applications: Molecular Docking Analysis

Nb/Starch-Doped ZnO Nanostructures for Polluted Water Treatment and Antimicrobial Applications: Molecular Docking Analysis

An investigation into the environmental and therapeutic applications of holmium-doped titanium dioxide (Ho-TiO2) nanocatalysts: a kinetic and thermodynamic study of the photocatalytic degradation of Safranin O dye

Tin Decorated Zinc Sulphide Nanoparticles for Photocatalytic Degradation of Bromophenol Blue Dye and Their Therapeutic Applications: A Kinetic and Thermodynamic Approach

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An investigation into the environmental and therapeutic applications of holmium-doped titanium dioxide (Ho-TiO₂) nanocatalysts: a kinetic and thermodynamic study of the photocatalytic degradation of Safranin O dye