Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid in Aqueous Solution Using Mn-doped ZnO/Graphene Nanocomposite Under LED Radiation

Ebrahimi, Roya; Mohammadi, Mahnaz; Maleki, Afshin; Jafari, Ali; Shahmoradi, Behzad; Rezaee, Reza; Safari, Mahdi; Daraei, Hiua; Giahi, Omid; Yetilmezsoy, Kaan; Shivaraju, Harikaranahalli Puttaiah

doi:10.1007/s10904-019-01280-3

Cited by 51 publications

(12 citation statements)

References 48 publications

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“…23,24 In addition, higher active sites and surface area of catalyst may induce the possible interaction rates of gaseous CO 2 and other intermediate compounds under heterogeneous photocatalytic reduction process. 25 Scanning electron microscopy images of the Mn-Ce/N-TiO 2 composite confirmed the spherical shaped nanoparticles (Fig. 8) and nanoparticles with spherical shapes apparently show greater surface area with potential catalytic activities.…”

Section: Resultsmentioning

confidence: 60%

Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

Shivaraju¹,

Anilkumar²,

Yashas³

et al. 2020

Biofuels Bioprod Bioref

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The development of improved catalysts for the hydrogenation of CO2 into methane is a sustainable response to the energy crisis and environmental problems at the global level. Mn‐Ce/N‐TiO2 heterojunctions, comprising a Mn‐Ce concretion composite, were prepared using a sol–gel technique, and the photocatalytic hydrogenation of CO2 was studied using visible light as alternative driving energy. The photocatalyst composite was characterized, and synergistic effects on the photocatalytic hydrogenation of CO2 into methane were investigated. The characterization results confirmed that there was a considerable shifting of band‐gap energy towards the visible range with required properties, which enhances photocatalytic activities under natural sunlight. Carbon dioxide hydrogenation and its potential for conversion into methane was evaluated using a specially designed photoreactor and different light sources. The results show a CO2 hydrogenation rate of about 16.8% ±0.2 in a visible light‐assisted catalytic reduction process in 60 min. The irradiation time and light source were studied and significant impacts on CO2 hydrogenation were observed under a LED light source and with H2O vapor as a reducing agent (up to 23.4% ± 0.2). The effect of photocatalysis on the methane yield in the anaerobic digestion (biomethanation) process was evaluated and a potential methane yield of up to 13.5% within 24 h was observed. The results suggested promising and sustainable applications of the Mn‐Ce/N‐TiO2 heterojunction composite for CO2 hydrogenation and for the conversion of CO2 into fuel and methane in the biomethanation process. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd

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Section: Resultsmentioning

confidence: 60%

Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

Shivaraju¹,

Anilkumar²,

Yashas³

et al. 2020

Biofuels Bioprod Bioref

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“…The main advantage of metal doping in the semiconductorgraphene composite system is the formation of multi-route or multi-level electron transfer, thus enabling the longevity of the photoinduced charge carriers, which in turn increases the photocatalytic activity. Enhanced photocatalytic performance of the ZnO:Cu:graphene [15], Ag/ZnO/graphene [16], graphene-ZnO-Au [17], ZnO:Sr/G [18] and Mn-doped ZnO/graphene [19] nanocomposites are reported in previous studies.…”

Section: Introductionmentioning

confidence: 67%

Unraveling the enhanced photocatalytic decomposition efficacy of the Al-doped ZnO nanoparticles@graphene sheets

Chidhambaram

Valanarasu

Ganesh

et al. 2020

J. Phys. D: Appl. Phys.

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This study reports the in situ wet chemical synthesis of Al-doped ZnO nanoparticle hybridized graphene (ZnO_Al/G) nanocomposite for the photocatalytic decomposition of methylene blue dye. The graphene-amalgamated Al-doped ZnO sample evidences a more enhanced photocatalytic decomposition performance than the pristine and Al-doped ZnO nanoparticles. Powder x-ray diffraction study reveals the addition of Al and graphene with the ZnO does not alter the hexagonal wurtzite phase of ZnO. Surface morphological results of the ZnO_Al/G nanocomposite obtained from scanning electron microscopy and transmission electron microscopy show that the Al-doped ZnO nanoparticles are fastened firmly to the graphene sheets. The Al and graphene inclusion does not alter the absorption onset of the ZnO, except for an enhanced light absorption in the visible region. The ZnO_Al/G nanocomposite imparts a higher photocatalytic decomposition rate constant (k) of about 0.0214 m −1 , while the values of pristine and Al-doped ZnO nanoparticles are about 0.0143 and 0.0129 m −1 , respectively. A plausible decomposition mechanism for the augmented photocatalytic performance of the ZnO_Al/G nanocomposite has been discussed in detail.

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“…Ebrahimi et al investigated the photocatalytic degradation of 2, 4-dichlorophenoxyacetic acid (2,4-D) using Mn-doped zinc oxide/graphene nanocomposite under light-emitting diode (LED) radiation in aqueous media. The results showed that 66.2% of 2,4-D could be photocatalytically degraded using Mn-doped zinc oxide/graphene nanocomposite under LED radiation at optimal conditions (pH 5, initial Zn concentration of 10 mg L −1 , nanocomposite concentration of 2 g L −1 , contact time of 120 min) [76]. Graphene oxide-titanium dioxide (GO@TiO 2 ) nanocomposite with mean diameter size of 14 nm has been fabricated by El-Shafai et al and further used as photocatalyst for enhanced degradation of carbaryl and imidacloprid.…”

Section: Photocatalytic Degradation Of Pesticidesmentioning

confidence: 99%

Graphene- and Graphene Oxide-Bounded Metal Nanocomposite for Remediation of Organic Pollutants

Brajesh¹

2020

Carbon-Based Material for Environmental Protection and Remediation

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Nanotechnology is one of the most interesting areas concerned with consumer products including cosmetics, household appliances, electronics, textiles, and food production as well as in medical products. Environmentally benign, economical, practical, and efficient processes for the synthesis of graphene (rGO)-/graphene oxide (GO)-bounded metal nanoparticles and their use for the remediation of organic pollutants (dyes, pharmaceutical wastes, pesticides, etc.) have been increasingly important goals in the chemical community from economic, safety, and environmental points of view. In this chapter, various strategies have successfully demonstrated the synthesis of graphene-/graphene oxide-bounded metal nanoparticles using various natural sources (plant extracts, biomolecules, polysaccharide, alcohols, etc.) and their applications in environmental remediation.

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Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid in Aqueous Solution Using Mn-doped ZnO/Graphene Nanocomposite Under LED Radiation

Cited by 51 publications

References 48 publications

Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

Unraveling the enhanced photocatalytic decomposition efficacy of the Al-doped ZnO nanoparticles@graphene sheets

Graphene- and Graphene Oxide-Bounded Metal Nanocomposite for Remediation of Organic Pollutants

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Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid in Aqueous Solution Using Mn-doped ZnO/Graphene Nanocomposite Under LED Radiation

Cited by 51 publications

References 48 publications

Facile synthesis of Mn‐Ce/N‐TiO2 composite for CO2 hydrogenation into methane and intensifying methane yield in biomethanation

Facile synthesis of Mn‐Ce/N‐TiO2 composite for CO2 hydrogenation into methane and intensifying methane yield in biomethanation

Unraveling the enhanced photocatalytic decomposition efficacy of the Al-doped ZnO nanoparticles@graphene sheets

Graphene- and Graphene Oxide-Bounded Metal Nanocomposite for Remediation of Organic Pollutants

Contact Info

Product

Resources

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Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation

Facile synthesis of Mn‐Ce/N‐TiO₂ composite for CO₂ hydrogenation into methane and intensifying methane yield in biomethanation