Electronic Structure and Energy Band of IIIA Doped Group ZnO Nanosheets

Feng, Xiaoshuang; Wang, Zhe; Zhang, Chang-wen; Wang, Pei-ji

doi:10.1155/2013/181979

Cited by 17 publications

(6 citation statements)

References 27 publications

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“…These blue shifts in the band-gap energy may be ascribed to the inadvertent occurrence of other metal atom impurities that may have altered the electronic movement across the valence and conduction bands [ 45 ]. Similar blueshifts have been observed on doping of zinc with IIIa group metal atoms [ 46 ] and 3d transitions metals [ 45 ].…”

Section: Discussionsupporting

confidence: 79%

Differential Antimycotic and Antioxidant Potentials of Chemically Synthesized Zinc-Based Nanoparticles Derived from Different Reducing/Complexing Agents against Pathogenic Fungi of Maize Crop

Kalia

Kaur

Tondey

et al. 2021

JoF

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The present study aimed for the synthesis, characterization, and comparative evaluation of anti-oxidant and anti-fungal potentials of zinc-based nanoparticles (ZnNPs) by using different reducing or organic complexing-capping agents. The synthesized ZnNPs exhibited quasi-spherical to hexagonal shapes with average particle sizes ranging from 8 to 210 nm. The UV-Vis spectroscopy of the prepared ZnNPs showed variation in the appearance of characteristic absorption peak(s) for the various reducing/complexing agents i.e., 210 (NaOH and NaBH4), 220 (albumin, and thiourea), 260 and 330 (starch), and 351 nm (cellulose) for wavelengths spanning over 190–800 nm. The FT-IR spectroscopy of the synthesized ZnNPs depicted the functional chemical group diversity. On comparing the antioxidant potential of these ZnNPs, NaOH as reducing agent, (NaOH (RA)) derived ZnNPs presented significantly higher DPPH radical scavenging potential compared to other ZnNPs. The anti-mycotic potential of the ZnNPs as performed through an agar well diffusion assay exhibited variability in the extent of inhibition of the fungal mycelia with maximum inhibition at the highest concentration (40 mg L−1). The NaOH (RA)-derived ZnNPs showcased maximum mycelial inhibition compared to other ZnNPs. Further, incubation of the total genomic DNA with the most effective NaOH (RA)-derived ZnNPs led to intercalation or disintegration of the DNA of all the three fungal pathogens of maize with maximum DNA degrading effect on Macrophomina phaseolina genomic DNA. This study thus identified that differences in size and surface functionalization with the protein (albumin)/polysaccharides (starch, cellulose) diminishes the anti-oxidant and anti-mycotic potential of the generated ZnNPs. However, the NaOH emerged as the best reducing agent for the generation of uniform nano-scale ZnNPs which possessed comparably greater anti-oxidant and antimycotic activities against the three test maize pathogenic fungal cultures.

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Section: Discussionsupporting

confidence: 79%

Differential Antimycotic and Antioxidant Potentials of Chemically Synthesized Zinc-Based Nanoparticles Derived from Different Reducing/Complexing Agents against Pathogenic Fungi of Maize Crop

Kalia

Kaur

Tondey

et al. 2021

JoF

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“…ZnO exists in ambient conditions on cubic substrates and at high pressures, as wurtzite, zinc-blende, and rock salt, respectively (Özgür et al 2005). The electronic structure of the thermostable phase of ZnO in wurtzite structure exists in sp 3 hybridization with each Zn atom surrounded by four neighboring O atoms at corners of a tetrahedron shape (Feng et al 2013). The ZnO nanoparticles act as semiconductors, photocatalysts due to the high energy gap, ferromagnetic property (Garcia et al 2007;Hong et al 2009;Nair et al 2011).…”

Section: Property Of Zno Nanoparticlesmentioning

confidence: 99%

Unlocking the potential of biosynthesized zinc oxide nanoparticles for degradation of synthetic organic dyes as wastewater pollutants

Gangwar

Sebastian

2021

Water Science and Technology

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The azo dyes released into water from different industries are accumulating in the water bodies and bioaccumulating within living systems thereby affecting environmental health. This is a major concern in developing countries where stringent regulations are not followed for the discharge of industrial waste into water bodies. This has led to the accumulation of various pollutants including dyes. As these developing countries also face acute water shortages and due to the lack of cost-effective systems to remove these pollutants, it is essential to remove these toxic dyes from water bodies, eradicate dyes, or generate fewer toxic derivatives. The photocatalysis mechanism of degradation of azo dyes has gained importance due to its eco-friendly and non-toxic roles in the environment. The zinc nanoparticles act as photocatalysts in combination with plant extracts. Plant-based nanoparticles over the years have shown the potential to degrade dyes efficiently. This is carried out by adjusting the dye and nanoparticle concentrations and combinations of nanoparticles. Our review article considers increasing the efficiency of degradation of dyes using Zinc oxide (ZnO) nanoparticles and understanding the photocatalytic mechanisms in the degradation of dyes and the toxic effects of these dyes and nanoparticles in different tropic levels.

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“…Furthermore, the introducing heteroatoms into ZnO materials are applied not only for the bulk but also for other morphologies such as nanoparticles, nanowires, and thin films. [ 13‐15 ] However, most studies of doped ZnO materials have interested in unsupported ZnO films, [ 16 ] in ZnO films placed on glass, [ 17,18 ] or on polycarbonate support, [ 19 ] in which the structural and electronic properties of ZnO films are not influenced by these supports. Furthermore, ZnO ultrathin films compositing of a few atomic layers have been successfully synthesized in different phases including freestanding structure, [ 20 ] deposited on various metal supports, Cu, [ 21,22 ] Ag, [ 23 ] Au.…”

Section: Introductionmentioning

confidence: 99%

“…[12] Furthermore, the introducing heteroatoms into ZnO materials are applied not only for the bulk but also for other morphologies such as nanoparticles, nanowires, and thin films. [13][14][15] However, most studies of doped ZnO materials have interested in unsupported ZnO films, [16] in ZnO films placed on glass, [17,18] or on polycarbonate support, [19] in which ZnO ultrathin films compositing of a few atomic layers have been successfully synthesized in different phases including freestanding structure, [20] deposited on various metal supports, Cu, [21,22] Ag, [23] Au. [24,25] It is worth noting that while the freestanding ZnO ultrathin films exhibit flat and graphite-like structures, ZnO ultrathin films deposited on metals are slightly strained and corrugated.…”

Section: Introductionmentioning

confidence: 99%

B and Au doped ZnO and ZnO/Cu(111) bilayer films: A DFT investigation

Thang,

Tram,

Thong

et al. 2022

Vietnam Journal of Chemistry

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AbstractsThe structural and electronic properties of B and Au doped graphite‐like ZnO and ZnO/Cu(111) bilayer films have been investigated by using the DFT + U scheme including dispersion correction and compared to that of undoped materials. The differences in electronic properties of the B and Au doped ZnO and ZnO/Cu(111) films compared to undoped materials were probed by CO adsorption. The same oxidation state of B (+3) was observed for B doped ZnO and ZnO/Cu(111) bilayer films. However, an excess electron associated with B doping is delocalized over the conduction band of ZnO, while it transfers to underlying Cu support of ZnO/Cu(111). This is evidenced by a much large redshift of CO frequency on B doped ZnO versus the small redshift of CO frequency on B doped ZnO/Cu(111). At variance, the oxidation state of Au dopant was reduced from +2 (5d9) for Au doped ZnO to +1 (5d10) for Au doped ZnO/Cu(111) films. This is due to the charge transfer from Cu support to doped Au which results in the stronger binding of CO on Au doped ZnO/Cu(111) compared to ZnO bilayer films. However, a slight difference in CO frequency was found for CO bound to Au doped ZnO and ZnO/Cu(111).

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Electronic Structure and Energy Band of IIIA Doped Group ZnO Nanosheets

Cited by 17 publications

References 27 publications

Differential Antimycotic and Antioxidant Potentials of Chemically Synthesized Zinc-Based Nanoparticles Derived from Different Reducing/Complexing Agents against Pathogenic Fungi of Maize Crop

Differential Antimycotic and Antioxidant Potentials of Chemically Synthesized Zinc-Based Nanoparticles Derived from Different Reducing/Complexing Agents against Pathogenic Fungi of Maize Crop

Unlocking the potential of biosynthesized zinc oxide nanoparticles for degradation of synthetic organic dyes as wastewater pollutants

B and Au doped ZnO and ZnO/Cu(111) bilayer films: A DFT investigation

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