A critical review on novel eco-friendly green approach to synthesize zinc oxide nanoparticles for photocatalytic degradation of water pollutants

Bhattacharjee, Nilanjana; Som, Ipsita; Saha, Rajnarayan; Mondal, Sandip

doi:10.1080/03067319.2021.2022130

Cited by 26 publications

(8 citation statements)

References 139 publications

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“…There are many literature reports about photocatalytic activity of ZnO NPs, but usually on single model pollutant (dye) [ 22 ]. The water is seldom polluted with a single species, usually wastewaters containing a mixture of organic compounds, from different classes [ 23 ]. This raises the question of whether ZnO NPs can degrade a more complex organic mixture, as competition for photocatalytic sites can occur.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Solvothermal Obtained ZnO Nanoparticles with Different Morphology and Photocatalytic Activity against a Dye Mixture: Methylene Blue, Rhodamine B and Methyl Orange

Motelică

Oprea

Vasile

et al. 2023

IJMS

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In this paper, we report the synthesis of ZnO nanoparticles (NPs) by forced solvolysis of Zn(CH3COO)2·2H2O in alcohols with a different number of –OH groups. We study the influence of alcohol type (n-butanol, ethylene glycol and glycerin) on the size, morphology, and properties of the obtained ZnO NPs. The smallest polyhedral ZnO NPs (<30 nm) were obtained in n-butanol, while in ethylene glycol the NPs measured on average 44 nm and were rounded. Polycrystalline particles of 120 nm were obtained in glycerin only after water refluxing. In addition, here, we report the photocatalytic activity, against a dye mixture, of three model pollutants: methyl orange (MO), methylene blue (MB), and rhodamine B (RhB), a model closer to real situations where water is polluted with many chemicals. All samples exhibited good photocatalytic activity against the dye mixture, with degradation efficiency reaching 99.99%. The sample with smallest nanoparticles maintained a high efficiency >90%, over five catalytic cycles. Antibacterial tests were conducted against Gram-negative strains Salmonella enterica serovar Typhimurium, Pseudomonas aeruginosa, and Escherichia coli, and Gram-positive strains Enterococcus faecalis, Bacillus subtilis, Staphylococcus aureus, and Bacillus cereus. The ZnO samples presented strong inhibition of planktonic growth for all tested strains, indicating that they can be used for antibacterial applications, such as water purification.

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Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Solvothermal Obtained ZnO Nanoparticles with Different Morphology and Photocatalytic Activity against a Dye Mixture: Methylene Blue, Rhodamine B and Methyl Orange

Motelică

Oprea

Vasile

et al. 2023

IJMS

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“…While this process facilitates rapid organic pollutant degradation, it has drawbacks, including environmental pollution due to reducing agents and the high cost associated with this method [69]. Among the methods mentioned above, photocatalysis is an environmentally friendly, cost-effective, and straightforward technique that occurs in the presence of sunlight and an appropriate photocatalyst [70]. Photocatalysis is applied to degrade various dyes and gases, such as CO 2 [66].…”

Section: Different Methods For Wastewater Treatmentmentioning

confidence: 99%

Harnessing the power of MXenes: a comprehensive exploration of their photocatalytic potential in mitigating hazardous dyes and CO2 reduction

Gulzar,

Haleem,

Rehman

et al. 2024

Discov Mater

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This comprehensive review extensively explores the potential applications of MXenes as versatile materials in the realm of photocatalysis, with a specific focus on their efficacy in mitigating hazardous dyes and CO2 to less harmful and friendly by-products. The review systematically investigates the unique properties that render MXenes well-suited for photocatalytic purposes and provides a thorough examination of their current state of research. It meticulously summarizes the successes and breakthroughs achieved thus far, offering insights into the advancements that have propelled these materials into the spotlight of photocatalytic research. In addition to highlighting achievements, the review critically addresses the challenges and hurdles that impede the full realization of the potential inherent in MXenes. Here, we have also highlighted the stability problem of MXenes and how to overcome this problem for efficient photocatalysis. The mechanism of photocatalysis was also the main theme of this review article and how to overcome the recombination of photogenerated charges. By identifying these challenges, the review serves as a valuable resource for researchers, providing a roadmap for future endeavours to unlock the untapped capabilities of these materials. It serves as a beacon for environmental researchers, offering valuable insights into the pivotal role these materials can play in creating a more environmentally friendly and safe world. Ultimately, this review contributes significantly to the collective knowledge base and will prove instrumental for researchers and professionals dedicated to environmental protection and sustainable living. Graphical Abstract

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“…The photocatalytic activity of nanomaterials is mostly determined by light absorption, charge transport, and separation on the catalyst surface (Bhattacharjee et al 2022). Photocatalysts reaction with light results formation of anionic electron-oxidative hole pairs, which later gets separated (Eqs.…”

Section: Kinetics and Models For Nano-bioremediation Of Contaminantsmentioning

confidence: 99%

Mechanistic and recent updates in nano-bioremediation for developing green technology to alleviate agricultural contaminants

Hidangmayum

Debnath

Guru

et al. 2022

Int. J. Environ. Sci. Technol.

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The rise in environmental pollutant levels in recent years is mostly attributable to anthropogenic activities such as industrial, agricultural and other activities. Additionally, these activities may produce excessive levels of dangerous toxicants such as heavy metals, organic pollutants including pesticide and herbicide chemicals, and sewage discharges from residential and commercial sources. With a focus on environmentally friendly, sustainable technology, new technologies such as combined process of nanotechnology and bioremediation are urgently needed to accelerate the cost-effective remediation process to alleviate toxic contaminants than the conventional remediation methods. Numerous studies have shown that nanoparticles possess special qualities including improved catalysis and adsorption as well as increased reactivity. Currently, microorganisms and their extracts are being used as promising, environmentally friendly catalysts for engineered nanomaterial. In the long term, this combination of both technologies called nano-bioremediation may significantly alter the field of environmental remediation since it is more intelligent, safe, environmentally friendly, economical and green. This review provides an overview of soil and water remediation techniques as well as the use of nano-bioremediation, which is made from various living organisms. Additionally, current developments related to the mechanism, model and kinetic studies for remediation of agricultural contaminants have been discussed.

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A critical review on novel eco-friendly green approach to synthesize zinc oxide nanoparticles for photocatalytic degradation of water pollutants

Cited by 26 publications

References 139 publications

Antibacterial Activity of Solvothermal Obtained ZnO Nanoparticles with Different Morphology and Photocatalytic Activity against a Dye Mixture: Methylene Blue, Rhodamine B and Methyl Orange

Antibacterial Activity of Solvothermal Obtained ZnO Nanoparticles with Different Morphology and Photocatalytic Activity against a Dye Mixture: Methylene Blue, Rhodamine B and Methyl Orange

Harnessing the power of MXenes: a comprehensive exploration of their photocatalytic potential in mitigating hazardous dyes and CO2 reduction

Mechanistic and recent updates in nano-bioremediation for developing green technology to alleviate agricultural contaminants

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