Highly efficient solar light-driven photocatalytic hydrogen production over Cu/FCNTs-titania quantum dots-based heterostructures

Reddy, N. Ramesh; Bhargav, U.; Kumari, M. Mamatha; Cheralathan, K.K.; Shankar, M.V.; Reddy, Kakarla Raghava; Saleh, Tawfik A.; Aminabhavi, Tejraj M.

doi:10.1016/j.jenvman.2019.109747

Cited by 119 publications

(20 citation statements)

References 61 publications

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“…Nowadays, there are numerous methods for the preparation of graphene, but the main preparation methods include mechanical stripping, liquid phase stripping, chemical vapor deposition, epitaxial growth and redox methods. 11 Recently, signicant research has been conducted on graphene quantum dots, [12][13][14] and carbon doped with other elements, molecules or organic materials. [15][16][17][18] Compared with graphene (G), graphene oxide (GO) has the advantages of low production cost, large-scale production, and easy processing.…”

Section: Introductionmentioning

confidence: 99%

Progress in the functional modification of graphene/graphene oxide: a review

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Progress in the functional modification of graphene/graphene oxide: a review

et al. 2020

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“…In this matter, green chemistry area focused on optimizing one of these factors via finding green alternatives for them, or using multicomponent as in situ alternatives for these three factors simultaneously. [9][10][11][12][13][14][15] The use of metal nanoparticles has different applications in different industries, but in general, these nanoparticles play a very important role as catalysts for different reactions including Mizoroki-Heck, Sonogashira, A 3 and carbon-coupling reactions. One of the important factors that can increase the efficiency of different industries is the use of nanoparticles, or better to say, different catalysts with multiple functions, as well as low cost along with high life-time and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

<p>Biosynthesis of Copper Oxide Nanoparticles with Potential Biomedical Applications</p>

Rabiee¹,

Bagherzadeh²,

Kiani³

et al. 2020

IJN

102

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Introduction: In recent years, the use of cost-effective, multifunctional, environmentally friendly and simple prepared nanomaterials/nanoparticles have been emerged considerably. In this manner, different synthesizing methods were reported and optimized, but there is still lack of a comprehensive method with multifunctional properties. Materials and Methods: In this study, we aim to synthesis the copper oxide nanoparticles using Achillea millefolium leaf extracts for the first time. Catalytic activity was investigated by in situ azide alkyne cycloaddition click and also A 3 coupling reaction, and optimized in terms of temperature, solvent, and time of the reaction. Furthermore, the photocatalytic activity of the synthesized nanoparticles was screened in terms of degradation methylene blue dye. Biological activity of the synthesized nanoparticles was evaluated in terms of antibacterial and anti-fungal assessments against Staphylococcus aureus, M. tuberculosis, E. coli, K. pneumoniae, P. mirabili, C. diphtheriae and S. pyogenes bacteria's and G. albicans, A. flavus, M. canis and G. glabrata fungus. In the next step, the biosynthesized CuO-NPs were screened by MTT and NTU assays. Results: Based on our knowledge, this is a comprehensive study on the catalytic and biological activity of copper oxide nanoparticles synthesizing from Achillea millefolium, which presents great and significant results (in both catalytic and biological activities) based on a simple and green procedure. Conclusion: Comprehensive biomedical and catalytic investigation of the biosynthesized CuO-NPs showed the mentioned method leads to synthesis of more eco-friendly nanoparticles. The in vitro studies showed promising and considerable results, and due to the great stability of these nanoparticles in a green media, effective biological activity considered as an advantageous.

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“…To modify the properties of nanoparticles is the introduction of dopant materials in the lattice of original system. Due to promising environmental compatibility, large bandwidth, high photosensitivity, and chemical stability, addition of Silver (Ag) enhance the photocatalytic ability of semiconductor metal oxide NPs [17]. This improvement occurred by broadening UV-vis absorption, production of surface oxygen vacancies, and preventing the reformation process of charge centers.…”

Section: Introductionmentioning

confidence: 99%

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Zeid

Ibrahem

Mohamed

et al. 2020

Mater. Res. Express

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CuO (S1) Single pure component nanoparticles (SPCNPs), Ag/CuO (S2) binary component hybrid nanoparticles (BCHNPS), Co1/Ag/CuO (S3), and Co2/Ag/CuO (S4) ternary component hybrid nanoparticles (TCHNPS) were synthesized via co-precipitation method. Several spectroscopic methods investigated the characterization of the prepared catalysts. Based on Crystal properties, CuO exhibit a monoclinic phase (tenorite); the grain size of the prepared samples was 28.15 nm, 29.42 nm, 27.86 nm, and 26.67 nm for S1, S2, S3, and S4 respectively. The addition of different content from Co as a dopant to silver decorated CuO gives a clear change to a flake shape. The presence of the IR absorption peaks in the region 400-600 cm −1 matched to the distinctive stretching vibrations of Cu-O bonds in the monoclinic phase structure of CuO. Disappearance of the Raman peaks of CuO and appearing of the new characteristic peaks of cobalt oxide confirms the doping process. Using DRS analysis, arrange of the bandgap values were S1 > S2 > S3 > S4. For the synthetic methyl orange and raw industrial dye, the photodegradation parameters were measured. The results show the excellent activity of Co2/Ag/CuO NPS compared with other samples. Electrical studies of the catalysts show a higher value for the dielectric constant in the higher and lower frequency regions for the sample S4. The hopping process of the charge carrier's improving as a result of the increase of applied field frequency which leads to an increase in the material conductivity.

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Highly efficient solar light-driven photocatalytic hydrogen production over Cu/FCNTs-titania quantum dots-based heterostructures

Cited by 119 publications

References 61 publications

Progress in the functional modification of graphene/graphene oxide: a review

Progress in the functional modification of graphene/graphene oxide: a review

<p>Biosynthesis of Copper Oxide Nanoparticles with Potential Biomedical Applications</p>

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

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