Simultaneous doping of sulfur and chloride ions into ZnO nanorods for improved photocatalytic properties towards degradation of methylene blue

Ujjan, Zaheer Ahmed; Bhatti, Muhammad Ali; Shah, Aqeel Ahmed; Tahira, Aneela; Shaikh, Nek M.; Kumar, Shusheel; Mugheri, Abdul Qayoom; Medany, Shymaa S.; Nafady, Ayman; Alnjiman, Fahad; Emo, Mélanie; Vigolo, Brigitte; Ibupoto, Zafar Hussain

doi:10.1016/j.ceramint.2021.11.098

Cited by 30 publications

(9 citation statements)

References 57 publications

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“…ZnO nanoparticles were produced following the articles by Z. A. Ujjan et al, and the same is described schematically in Figure 1 [19].…”

Section: Synthesis Of Zno Nanoparticlesmentioning

confidence: 99%

“…Some of the nanofillers act as UV screens, absorbing damaging radiations. The US Food and Drug Administration (FDA) has authorized two inorganic filters (commonly known as mineral filters): titanium dioxide (TiO 2 ) and zinc oxide (ZnO); both are metal oxide particles [19]. These molecules absorb, reflect, and refract UV photons, but they predominantly operate in photoprotection by absorbing UV radiation [20].…”

Section: Introductionmentioning

confidence: 99%

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UV Blocking and Oxygen Barrier Coatings Based on Polyvinyl Alcohol and Zinc Oxide Nanoparticles for Packaging Applications

et al. 2022

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Photodegradation and oxidation are major causes of the deterioration of food, resulting in darkening, off-flavors, and nutrient deficiency. To reduce this problem, novel functional polymeric materials are being developed to retain food’s light sensitivity. Nanofillers are also used in a polymeric film to produce effective UV blockings and oxygen barrier coatings so that the degradation of the food can be delayed, thereby increasing the shelf life. For this purpose, polyvinyl alcohol coatings were prepared by the incorporation of ZnO nanoparticles. Polyvinyl alcohol is a naturally excellent barrier against oxygen, and the addition of ZnO particles at the nanoscale size has demonstrated effective UV blocking capabilities. In this work, the hydrothermal technique is used to produce ZnO nanoparticles, and these produced particles are then incorporated into the polyvinyl alcohol to produce thin films. These films are characterized in terms of the compositional, macroscopic, microscopic, and optical properties via X-ray diffraction (XRD), FTIR, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA), as well as UV–VIS spectroscopy. ZnO nanoparticles at different concentrations were incorporated into the PVA solution, and the films were processed via the blade coating method. With the addition of ZnO, the oxygen transmission rate (OTR) of pure PVA was not altered and remained stable, and the lowest OTR was recorded as 0.65 cm3/m2·day·bar. Furthermore, the addition of ZnO increased the water contact angle (WCA) of PVA, and the highest WCA was recorded to be around more than 70°. Due to this, water permeability decreased. Additionally, PVA/ZnO films were highly flexible and bendable and maintained the OTR even after going through bending cycles of 20K. Furthermore, the addition of ZnO showed a significant UV blocking effect and blocked the rays below a wavelength of 380 nm. Finally, the optimized films were used for packaging applications, and it was observed that the packaged apple remained fresh and unoxidized for a longer period as compared with the piece of apple without packaging. Thus, based on these results, the PVA/ZnO films are ideally suited for packaging purposes and can effectively enhance the shelf life of food.

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“…ZnO nanoparticles were produced following the articles by Z. A. Ujjan et al, and the same is described schematically in Figure 1 [19].…”

Section: Synthesis Of Zno Nanoparticlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

UV Blocking and Oxygen Barrier Coatings Based on Polyvinyl Alcohol and Zinc Oxide Nanoparticles for Packaging Applications

et al. 2022

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“…Drawing from the insights gained through the scavenging and TOC experiments, a plausible degradation mechanism for MG was proposed through Formulae (R1)–(R8) below as previously described. 46 ZnCP + hν → ZnCP (e cb − + h vb + ) ZnCP (e cb − ) + O 2 → ZnCP + ˙O 2 − h vb + + OH − → ˙OH˙O 2 − + H + → ˙OH 2 ZnCP (e cb − ) + ˙OH 2 + H + → H 2 O 2 H 2 O 2 + ZnCP (e cb − ) → ˙OH + OH − ˙O 2 − + MG dye → Degraded productse − + MG dye → Degraded products…”

Section: Optical Properties and Energy Bandgapmentioning

confidence: 99%

“…Drawing from the insights gained through the scavenging and TOC experiments, a plausible degradation mechanism for MG was proposed through Formulae (R1)-(R8) below as previously described. 46 ZnCP + hn -ZnCP (e cb À + h vb + ) (R1)…”

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confidence: 99%

Multifaceted properties of an engineered three-dimensional Zn(ii)–metal–organic coordination polymer: synthesis, crystal structure, efficient photocatalytic degradation of an organic dye and selective luminescent sensing

Khan,

AlFawaz,

Hasan

et al. 2024

New J. Chem.

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“…Recently, many scientific and technological efforts have been made, focusing on improving the physical properties of AIN, such as adding catalysts [ 1 ], doping metal and metal oxides [ 2 , 3 , 4 ], preparing composite materials [ 5 ], etc. Among these methods, doping metal materials into AIN has been proven to be a simple and efficient approach to enhance its physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Structural and Surface Morphology and Photoluminescence of Ni-Doped AlN Thin Films Grown by Co-Sputtering

et al. 2022

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Aluminum nitride (AlN) is a semiconductor material possessing a hexagonal wurtzite crystal structure with a large band gap of 6.2 eV. AlN thin films have several potential applications and areas for study, particularly in optoelectronics. This research study focused on the preparation of Ni-doped AlN thin films by using DC and RF magnetron sputtering for optoelectronic applications. Additionally, a comparative analysis was also carried out on the as-deposited and annealed thin films. Several spectroscopy and microscopy techniques were considered for the characterization of structural (X-ray diffraction), morphological (SEM), chemical bonding (FTIR), and emission (PL spectroscopy) properties. The XRD results show that the thin films have an oriented c-axis hexagonal structure. SEM analysis validated the granular-like morphology of the deposited sample, and FTIR results confirm the presence of chemical bonding in deposited thin films. The photoluminescence (PL) emission spectra exhibit different peaks in the visible region when excited at different wavelengths. A sharp and intense photoluminescence peak was observed at 426 nm in the violet-blue region, which can be attributed to inter-band transitions due to the incorporation of Ni in AlN. Most of the peaks in the PL spectra occurred due to direct-band recombination and indirect impurity-band recombination. After annealing, the intensity of all observed peaks increases drastically due to the development of new phases, resulting in a decrease in defects and a corresponding increase in the crystallinity of the thin film. The observed structural, morphological, and photoluminescence results suggest that Ni: AlN is a promising candidate to be used in optoelectronics applications, specifically in photovoltaic devices and lasers.

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Simultaneous doping of sulfur and chloride ions into ZnO nanorods for improved photocatalytic properties towards degradation of methylene blue

Cited by 30 publications

References 57 publications

UV Blocking and Oxygen Barrier Coatings Based on Polyvinyl Alcohol and Zinc Oxide Nanoparticles for Packaging Applications

UV Blocking and Oxygen Barrier Coatings Based on Polyvinyl Alcohol and Zinc Oxide Nanoparticles for Packaging Applications

Multifaceted properties of an engineered three-dimensional Zn(ii)–metal–organic coordination polymer: synthesis, crystal structure, efficient photocatalytic degradation of an organic dye and selective luminescent sensing

A Study of the Structural and Surface Morphology and Photoluminescence of Ni-Doped AlN Thin Films Grown by Co-Sputtering

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