Green synthesis of cuprous oxide nanoparticles for environmental remediation and enhanced visible-light photocatalytic activity

Muthukumaran, M.; Dhinagaran, G.; Venkatachalam, Kartik; Sagadevan, Suresh; Gunasekaran, S.; Podder, Jiban; Mohammad, Faruq; Shahid, Muhammad; Oh, Won Chun

doi:10.1016/j.ijleo.2020.164849

Cited by 33 publications

(6 citation statements)

References 27 publications

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“…The catalytic efficiency showed that with the appearance of octahedron nanostructure and the increasing ratio of (111) crystal surface, the catalytic effect was naturally enhanced, which was consistent with the reports of other researchers [17,38,39]. and ⋅OH formed in this way react with the molecules in the organic dye due to their high activity, and produce harmless substances [40,41]. The photocatalytic efficiency depends on the synergistic effect of the three processes: the excitation of photogenic carriers, the separation and transmission of photogenic electron-hole pairs, and the redox reaction at the active sites [42].…”

Section: Resultssupporting

confidence: 90%

“…The free electrons in the conduction band (CB) migrate to the crystal surface of Cu 2 O and react quickly with the adsorbed O 2 and produce superoxide radicals (·O 2 – ), and in the same way, the holes in the valence band (VB) react with adsorbed H 2 O (or OH – ) to form free radicals (·OH) in the aqueous solution. The ·O 2 – and ·OH formed in this way react with the molecules in the organic dye due to their high activity, and produce harmless substances [40, 41]. The photocatalytic efficiency depends on the synergistic effect of the three processes: the excitation of photogenic carriers, the separation and transmission of photogenic electron‐hole pairs, and the redox reaction at the active sites [42].…”

Section: Resultsmentioning

confidence: 99%

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Facile regulation of cuprous oxide microcrystal morphology and planes for visible light photocatalytic degradation

Zhang

Yang³

et al. 2022

Micro & Nano Letters

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Cuprous oxide (Cu2O) microcrystal is an excellent material for absorbing visible light and photo‐catalyzing various water pollutants. The photocatalytic performance of Cu2O crystal mainly depends on its morphology and exposure surface. In this study, Cu2O crystals have been successfully fabricated at room temperature. Morphology and the proportion of exposed crystal faces are regulated by a simple method with hydrazine hydrate as the reducing agent. The experimental results unveiled that high dosage of hydrazine hydrate tends to produce crystals with spherical and low (111) plane ratios, while low dosage of hydrazine hydrate provides an excellent condition for the formation of octahedral microcrystal with high proportion of (111) planes. The photocatalytic degradation efficiency of methylene blue (MB) in visible light increased with the proportion of (111) planes. Analysis shows that the better crystallinity and conductivity of the octahedron structure improved the utilization rate of photogenerated carriers, while the unsaturated Cu on the (111) planes as the active site promotes the decomposition of the pollutants.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Facile regulation of cuprous oxide microcrystal morphology and planes for visible light photocatalytic degradation

Zhang

Yang³

et al. 2022

Micro & Nano Letters

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“…The environmentally friendly and sustainable synthesis methods are using in "green" chemistry in order to prevent the formation of toxic by-products [22][23][24]. Different biological materials, such as plant extracts, algae, fungi, bacteria, etc., are used in the "green" synthesis of metal and metal oxide NPs [25][26][27][28][29][30][31][32][33][34][35][36]. The use of plant extracts is fairly easy for obtaining NPs on a large scale, compared to the synthesis with fungi and bacteria [20,37,38].…”

Section: Biological Components For "Green" Synthesismentioning

confidence: 99%

Green Synthesis of Metal and Metal Oxide Nanoparticles: Principles of Green Chemistry and Raw Materials

et al. 2021

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Increased request for metal and metal oxide nanoparticles nanoparticles has led to their large-scale production using high-energy methods with various toxic solvents. This cause environmental contamination, thus eco-friendly “green” synthesis methods has become necessary. An alternative way to synthesize metal nanoparticles includes using bioresources, such as plants and plant products, bacteria, fungi, yeast, algae, etc. “Green” synthesis has low toxicity, is safe for human health and environment compared to other methods, meaning it is the best approach for obtaining metal and metal oxide nanoparticles. This review reveals 12 principles of “green” chemistry and examples of biological components suitable for “green” synthesis, as well as modern scientific research of eco-friendly synthesis methods of magnetic and metal nanoparticles. Particularly, using extracts of green tea, fruits, roots, leaves, etc., to obtain Fe3O4 NPs. The various precursors as egg white (albumen), leaf and fruit extracts, etc., can be used for the „green” synthesis of spinel magnetic NPs. “Green” nanoparticles are being widely used as antimicrobials, photocatalysts and adsorbents. “Green” magnetic nanoparticles demonstrate low toxicity and high biocompatibility, which allows for their biomedical application, especially for targeted drug delivery, contrast imaging and magnetic hyperthermia applications. The synthesis of silver, gold, platinum and palladium nanoparticles using extracts from fungi, red algae, fruits, etc., has been described.

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“…The application of photocatalysis as a viable approach to environmental remediation − and energy production − has often been underpinned by the methods used to evaluate catalysts and reactor systems. Materials synthesis continues to be the primary area of research in this field, which is evident from the extensive range of literature reporting novel catalysts for numerous applications, , often with the objective of operating under visible irradiation. , As a result, there has always been a certain amount of focus on how these catalysts are evaluated to determine their level of activity. , In relation to pollutant removal, this often involves the use of chemical probes or model compounds, which are a simplified representation of real-world contaminants.…”

Section: Introductionmentioning

confidence: 99%

“…The application of photocatalysis as a viable approach to environmental remediation 1 − 4 and energy production 5 − 8 has often been underpinned by the methods used to evaluate catalysts and reactor systems. Materials synthesis continues to be the primary area of research in this field, which is evident from the extensive range of literature reporting novel catalysts for numerous applications, 9 , 10 often with the objective of operating under visible irradiation.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Monitoring of Photocatalytic Reactive Oxygen Species: Using Electrochemistry for Rapid Sensing of Hydroxyl Radicals Formed during the Degradation of Coumarin

McCormick

Rice

McCrudden³

et al. 2023

J. Phys. Chem. A

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Many recent research studies have reported indirect methods for the detection and quantification of OH radicals generated during photocatalysis. The short lifespan and high reactivity of these radicals make indirect detection using probes such as coumarin a more viable quantification method. Hydroxyl radical production is commonly monitored using fluorescence spectroscopy to determine the concentration of the compound 7hydroxycoumarin, which is formed from hydroxyl radical attack on coumarin. There are, however, a number of additional hydroxylated coumarins generated during this process, which are less amenable to detection by fluorescence spectroscopy. Consequently, limitations and inaccuracies of this method have previously been reported in the literature. As an alternative approach to those previously reported, this work has developed an electrochemical screening method using coumarin as a OH radical trap, that is capable of in situ monitoring of not only 7-hydroxycoumarin, but all the main mono-hydroxylated products formed. As a result, this technique is a more representative and comprehensive method for the quantification of OH radicals produced by photocatalysts using coumarin as a probe molecule. Moreover, the electroanalytical method provides a portable, rapid, sensitive, and accurate in situ method for the monitoring of OH radical formation without the need for sample preparation.

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Green synthesis of cuprous oxide nanoparticles for environmental remediation and enhanced visible-light photocatalytic activity

Cited by 33 publications

References 27 publications

Facile regulation of cuprous oxide microcrystal morphology and planes for visible light photocatalytic degradation

Facile regulation of cuprous oxide microcrystal morphology and planes for visible light photocatalytic degradation

Green Synthesis of Metal and Metal Oxide Nanoparticles: Principles of Green Chemistry and Raw Materials

Enhanced Monitoring of Photocatalytic Reactive Oxygen Species: Using Electrochemistry for Rapid Sensing of Hydroxyl Radicals Formed during the Degradation of Coumarin

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