Silicate sol–gel matrix stabilized ZnO–Ag nanocomposites materials and their environmental remediation applications

Praveen, Raju; Chandreshia, C.T. Beautlin; Ramaraj, Ramasamy

doi:10.1016/j.jece.2017.01.048

Cited by 13 publications

(3 citation statements)

References 21 publications

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“…Colloidal Ag-ZnO has also been synthesised. There are numerous similar procedures of metal-ZnO synthesis [20][21][22][23][24][25][26][27][28]. We synthesised Al-doped ZnO NPs through the sol-gel method using a mixture of zinc nitrate hexahydrate (Zn(NO 3 ) 2 •6H 2 O), aluminium nitrate nonahydrate (Al(NO 3 ) 3 •9H 2 O), urea CH 4 N 2 O, ethanol, and DI (Deionized) water.…”

Section: Methodsmentioning

confidence: 99%

“…ZnO NPs of various shapes and nanocomposites have been prepared by various physical and chemical methods like hydrochemical, sonochemical, physical vapour deposition, chemical vapour, biosynthesis using seeds, and green synthesis using leaf extracts [12–32]. Metal doping in ZnO has been found to alter the physiochemical properties of ZnO to a large extent.…”

Section: Introductionmentioning

confidence: 99%

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Reverse strain effects in the defect states in aluminium doped ZnO

Dash

Kumari

Jana

et al. 2023

Materials Science and Technology

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ZnO was synthesised by the sol–gel method using zinc nitrate as the precursor. ZnO was doped with Al. Stress in the lattice was evident from the XRD peak shifts. A higher concentration of Al+3 showed a reverse strain effect also causing a reverse effect in the optical properties. An increase in crystallite size due to increased Al+3 was observed. A variation in absorption intensity based on the defect energy levels was observed. A difference in energy of the emission and absorption spectra resulting from defects in the material and non-radiative decay was seen. A change in the band gap was observed with changes in different dopant concentrations. These findings are useful for photocatalytic as well as antibacterial and anticancer treatments.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reverse strain effects in the defect states in aluminium doped ZnO

Dash

Kumari

Jana

et al. 2023

Materials Science and Technology

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“… Diagrammatic portrayal of photocatalytic oxidation of the methylene blue (MB) dye at the aminosilicate sol–gel supported silver nanoparticles. Reproduced from reference [ 123 ], with permission from Elsevier, 2018. …”

Section: Figurementioning

confidence: 99%

Developments in the Application of Nanomaterials for Water Treatment and Their Impact on the Environment

2020

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Nanotechnology is an uppermost priority area of research in several nations presently because of its enormous capability and financial impact. One of the most promising environmental utilizations of nanotechnology has been in water treatment and remediation where various nanomaterials can purify water by means of several mechanisms inclusive of the adsorption of dyes, heavy metals, and other pollutants, inactivation and removal of pathogens, and conversion of harmful materials into less harmful compounds. To achieve this, nanomaterials have been generated in several shapes, integrated to form different composites and functionalized with active components. Additionally, the nanomaterials have been added to membranes that can assist to improve the water treatment efficiency. In this paper, we have discussed the advantages of nanomaterials in applications such as adsorbents (removal of dyes, heavy metals, pharmaceuticals, and organic contaminants from water), membrane materials, catalytic utilization, and microbial decontamination. We discuss the different carbon-based nanomaterials (carbon nanotubes, graphene, graphene oxide, fullerenes, etc.), and metal and metal-oxide based nanomaterials (zinc-oxide, titanium dioxide, nano zerovalent iron, etc.) for the water treatment application. It can be noted that the nanomaterials have the ability for improving the environmental remediation system. The examination of different studies confirmed that out of the various nanomaterials, graphene and its derivatives (e.g., reduced graphene oxide, graphene oxide, graphene-based metals, and graphene-based metal oxides) with huge surface area and increased purity, outstanding environmental compatibility and selectivity, display high absorption capability as they trap electrons, avoiding their recombination. Additionally, we discussed the negative impacts of nanomaterials such as membrane damage and cell damage to the living beings in the aqueous environment. Acknowledgment of the possible benefits and inadvertent hazards of nanomaterials to the environment is important for pursuing their future advancement.

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Nanocomposites of ZnO for Water Remediation

Basnet

Chatterjee

2019

Composites for Environmental Engineering

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Silicate sol–gel matrix stabilized ZnO–Ag nanocomposites materials and their environmental remediation applications

Cited by 13 publications

References 21 publications

Reverse strain effects in the defect states in aluminium doped ZnO

Reverse strain effects in the defect states in aluminium doped ZnO

Developments in the Application of Nanomaterials for Water Treatment and Their Impact on the Environment

Nanocomposites of ZnO for Water Remediation

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