Structural and morphological properties of Co3O4 nanostructures: Investigation of low temperature oxidation for photocatalytic application for waste water treatment

Magdalane, C. Maria; Kaviyarasu, K.; Arularasu, M.V.; Kanimozhi, K.; Ramalingam, G.

doi:10.1016/j.surfin.2019.100369

Cited by 41 publications

(12 citation statements)

References 29 publications

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“…Well dispersed and uniform nanoparticles ranging between sizes 25–35 nm were the result [ 7 ]. Magdalane et al, 2019 synthesized Co 3 O 4 nanoparticles using Aspalathus linearis leaf extract and cobalt nitrate (Co(NO 3 ) 2 ) via a hydrothermal method to obtain nanoparticles of irregular morphology, irregular shape and a size, ranging from 20–40 nm [ 12 ]. Using a plant extract, too, Dubey et al report Co 3 O 4 nanoparticles synthesized from cobalt acetate tetrahydrate (Co(CH 3 COO) 2 ·4H 2 O, ammonia solution (NH 3 ·H 2 O), and the latex of Calotropis procera [ 49 ].…”

Section: Synthesismentioning

confidence: 99%

“…Co 3 O 4 nanoparticles have been used for applications such as energy storage, solar cells, capacitors, gas sensors, field emission materials, magneto-resistive devices, field effect transistors, and rechargeable Li-ion batteries [ 2 , 7 ]. They have also been used as photocatalysts for the degradation or adsorption of dyes and organic pollutants, as well as antimicrobial, antioxidant, and anticancer applications [ 2 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. The remediation potential of Co 3 O 4 nanoparticles is encouraging, since they are efficient in degrading pollutants that they have an affinity for and are also alternatives to the more expensive noble metals [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

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Recent Trends and Advances of Co3O4 Nanoparticles in Environmental Remediation of Bacteria in Wastewater

2022

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Antibiotic resistance is a formidable global threat. Wastewater is a contributing factor to the prevalence of antibiotic-resistant bacteria and genes in the environment. There is increased interest evident from research trends in exploring nanoparticles for the remediation of antibiotic-resistant bacteria. Cobalt oxide (Co3O4) nanoparticles have various technological, biomedical, and environmental applications. Beyond the environmental remediation applications of degradation or adsorption of dyes and organic pollutants, there is emerging research interest in the environmental remediation potential of Co3O4 nanoparticles and its nanocomposites on antibiotic-resistant and/or pathogenic bacteria. This review focuses on the recent trends and advances in remediation using Co3O4 nanoparticles and its nanocomposites on antibiotic-resistant or pathogenic bacteria from wastewater. Additionally, challenges and future directions that need to be addressed are discussed.

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Section: Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Trends and Advances of Co3O4 Nanoparticles in Environmental Remediation of Bacteria in Wastewater

2022

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“…The catalytic activity of a photocatalyst is influence by the band gap of photocatalyst and surface area which is related to the particle size [23,7]. The optical properties become an imported characteristic when the catalyst is used as a photocatalysis instead of Fenton catalysis since photocatalysis requires the excitation of an electron from the valance band to the conduction band by the adsorption of light [7,24,25]. Adsoprtion in visible light and a small band gap is preferred because solar light consist mostly of visible light.…”

Section: Co(oh) 2 + H 2 O 2 → Co 3 O 4 + 4 H 2 Omentioning

confidence: 99%

Size Control of Cobalt Oxide Nanoparticles and Its Effect on the Fenton Catalytic Activity

Viljoen¹,

Kganyago²,

Ofomaja³

2020

Pol. J. Environ. Stud.

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Cobalt oxide nanoparticles were prepared using a precipitation-oxidation method at mild reaction conditions. The nanoparticles had spherical shapes and sizes that ranged from 4.6 nm to 19.4 nm as determined by TEM and XRD. XRD indicated that the nanoparticles consisted only of the Co 3 O 4 phase. The nanoparticles' size was controlled using different amounts of the oxidant, hydrogen peroxide. The size was controlled in the absence of capping molecules. The yield increased with an increase in the amount of hydrogen peroxide used. The cobalt oxide nanoparticles were used as catalyst for the Fenton reaction to degrade methylene blue dye by hydrogen peroxide oxidation. The catalytic activity increased with a decrease in particle size. A percentage degradation of 99 % in 30 minutes was obtained when the 4.6 nm sized nanoparticles was used as catalyst. No significant methylene blue degradation was observed in the absence of the catalyst.

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“…In this scenario, supercapacitors are emerging electrochemical energy storing devices due to its enormous properties like high power density, safe operational quality, fast charging/discharging rate, faster response time, long-term cycle stability and ecofriendliness [1][2][3][4][5][6][7][8]. Transition metal oxide/hydroxide such as CoO [9,10], RuO 2 [11], NiO [12,13], MgO, CuO [14][15][16][17][18], TiO 2 [19,20], and FeO [21,22] is the most commonly used electrode material in a electrochemical setup, and they determine the electrochemical performance of the supercapacitors [23]. Among these transition metal oxides, CuO is a multifunctional material, and it has versatile properties like inexpensiveness, low-toxicity, high theoretical capacity (670 mAhg −1 ), and low electrical conductivity [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Nanostructures of CuO/Cu2O Fabricated via Potentiostatic and Galvanostatic Anodization

Margaret¹,

Winston²,

Muthupandi³

et al. 2021

Journal of Nanomaterials

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A detailed comparative study on the synthesis process of coral-like CuO/Cu2O nanorods (NRs) and nanopolycrystals (NPCs) fabricated on Cu foil employing aqueous electrolyte via potentiostatic (POT) and galvanostatic (GAL) modes is discussed. The structural, morphological, thermal, compositional, and molecular vibration of the prepared CuO/Cu2O nanostructures was characterized by XRD, HRSEM, TG/DTA, FTIR, and EDX techniques. XRD analysis confirmed the crystalline phase of the formation of monoclinic CuO and cubic Cu2O nanostructures with well-defined morphology. The average particle size was found to be 21.52 nm and 26.59 nm for NRs (POT) and NPCs (GAL), respectively, and this result is corroborated from the HRSEM analysis. POT synthesized nanoparticle depicted a higher thermal stability up to 600°C implying that the potentiostatically grown coral-like NRs exhibit a good crystallinity and well-ordered morphology.

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Structural and morphological properties of Co3O4 nanostructures: Investigation of low temperature oxidation for photocatalytic application for waste water treatment

Cited by 41 publications

References 29 publications

Recent Trends and Advances of Co3O4 Nanoparticles in Environmental Remediation of Bacteria in Wastewater

Recent Trends and Advances of Co3O4 Nanoparticles in Environmental Remediation of Bacteria in Wastewater

Size Control of Cobalt Oxide Nanoparticles and Its Effect on the Fenton Catalytic Activity

A Comparative Study of Nanostructures of CuO/Cu2O Fabricated via Potentiostatic and Galvanostatic Anodization

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