A study on preparation of unique TiO<sub>2</sub>/Cu<sub>2</sub>O nanocomposite with highly efficient photocatalytic reactivity under visible-light irradiation

Kavitha, S.; Jayamani, N.; Barathi, D.

doi:10.1080/10667857.2020.1786785

Cited by 14 publications

(7 citation statements)

References 64 publications

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“…Many researchers have used TiO 2 , ZnO, SnO 2 , and CeO 2 as photocatalysts [89][90][91]. Among these semiconductors, TiO 2 and ZnO have close band gap energies which exhibit photocatalytic degradation and cost-effectiveness.…”

Section: Photocatalysts Activity Of Zno Npsmentioning

confidence: 99%

Plant-Mediated Biosynthesis and Photocatalysis Activities of Zinc Oxide Nanoparticles: A Prospect towards Dyes Mineralization

Fagier

2021

Journal of Nanotechnology

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In recent years, nanoparticles synthesis by green synthesis has gained extensive attention as a facile, inexpensive, and environmentally friendly method compared with chemical and physical synthesis methods. This review covered the biosynthesis of zinc oxide nanoparticles (ZnO NPs), including the procedure and mechanism. Factors affecting the formation of ZnO NPs are discussed. The presence of active bioorganic molecules in plant extract played a vital role in the formation of ZnO NPs as a natural green medium in the metallic ion reduction processes. ZnO NPs exhibit attractive photocatalysis properties due to electrochemical stability, high electron mobility, and large surface area. In this review, the procedure and mechanism of the ZnO photocatalysis process are studied. The effects of dyes amount, catalysts, and light on photodegradation efficiency are also considered. This review provides useful information for researchers who are dealing with green synthesis of ZnO NPs. Moreover, it can provide investigators with different perceptions towards the efficiency of biosynthesized ZnO NPs on dyes degradation and its restrictions.

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Section: Photocatalysts Activity Of Zno Npsmentioning

confidence: 99%

Plant-Mediated Biosynthesis and Photocatalysis Activities of Zinc Oxide Nanoparticles: A Prospect towards Dyes Mineralization

Fagier

2021

Journal of Nanotechnology

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“…More importantly, Cu 2 O as a special P-type semiconductor has a much higher conduction band than that of ordinary wide band semiconductors . Therefore, it can be assumed that n-type semiconductor TiO 2 combined with Cu 2 O forms a type II heterogeneous structure, which not only modifies the surface of Cu 2 O but also effectively avoids the photocorrosion of Cu 2 O . For example, Xu et al prepared Cu 2 O/TiO 2 nanomaterials with multiple void structures for efficient CO 2 reduction. − Therefore, it is an urgent problem to design and prepare the micronanostructure of the composite system.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembled Sandwich-like MXene-Derived Composites as Highly Efficient and Sustainable Catalysts for Wastewater Treatment

Yin

Jiao

et al. 2021

Langmuir

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Photocatalysts play an increasingly important role in environmental remediation polluted by industrial wastewater. However, the preparation of adsorbents and catalysts with high activity by simple and easy methods is still a great challenge. Here, sandwich-like composite catalyst Cu2O/TiO2/Ti3C2 was prepared by an easily available solvent reduction measure for the highly efficient catalytic nitro compounds. In particular, sandwich-like composite catalyst Cu2O/TiO2/Ti3C2 exhibits excellent catalysis for 2-nitroaniline (2-NA) and 4-nitrophenol (4-NP), and its pseudo-first-order reaction rate constants (k) are 0.163 and 0.114 min–1, respectively. Interestingly, even after eight consecutive cycles of catalytic experiments, the conversion rates of catalytic 2-NA and 4-NP are still greater than 95 and 92%, respectively, demonstrating that the obtained catalyst has excellent catalytic capability and a high reutilization rate. The excellent catalytic performances of Cu2O/TiO2/Ti3C2 can be attributed to the fact that Ti3C2 provides a greater reaction site for the formation of Cu2O and reduces the aggregation during the formation of Cu2O by in situ synthesis. Therefore, ternary composite catalyst Cu2O/TiO2/Ti3C2 prepared by solvent reduction not only supplies a technical method for the catalytic reaction of MXene-based material but also lays the foundation for the development of new photocatalysts.

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“…The development of p-n heterojunction by coupling metal oxide semiconductor specifically p-Cu2O with n-TiO2 can extend the light absorption of TiO2 toward the visible light, and the built-in intrinsic electric field originated from p-Cu2O/n-TiO2 heterojunction will accelerate the charge separation of photo-induced electron-hole pairs [1]. Because of these features, p-Cu2O/n-TiO2 heterojunction possess prominent beneficial in many application fields such as photocatalyst either in pollutant degradation [2] or hydrogen production [3,4] and solar energy conversion in photovoltaic devices [5]. Significant effort has been devoted to the fabrication of p-Cu2O/n-TiO2 heterojunction with different hybrid or bi-layer morphologies combination with several main purposes, (i) enhance the adsorption ability, (ii) enlarge the absorbance of light in the visible region and (iii) favour the separation of photoinduced carriers.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of p-Cu2O on n-TiO2 Layer by Electrodeposition Method for Heterojunction Solar Cells Development

Ahmad

Mohamad

Azman

et al. 2021

J. Hum. Earth Future

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This study focused on the copper (I) oxide (Cu2O) that serves as an absorber layer, owing to its excellent optical properties, while titanium dioxide (TiO2) is a well-known material that has superior properties in solar cell development. In this work, the TiO2 nanorods layer was synthesised on a fluorine-doped tin oxide (FTO) glass substrate by a facile hydrothermal method followed by stacking the Cu2O layer using a low-cost electrodeposition method at different deposition times. Prior to deposition, a cyclic voltammetry (CV) measurement was performed, and the result showed that Cu2O films were successfully grown on the TiO2 nanorods layer with high uniformity. The crystallinity of the Cu2O/TiO2 film was increased when the deposition time was elevated. The strongest diffraction peak was detected in the sample deposited for 90 minutes. FE-SEM images revealed the formation of the pyramidal structure of Cu2O on the TiO2nanorod layer. The optical properties showed that the samples deposited at 60 minutes and above were red-shifted, with the estimated bandgap being slightly decreased when extending the deposition time. Meanwhile, the resistivity and sheet resistance of the as-prepared samples were increased. The performance of the solar cell was investigated, and the power energy conversion was slightly increased to 0.0267% for the heterojunction sample deposited at 90 minutes. Doi: 10.28991/HEF-2021-02-04-02 Full Text: PDF

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A study on preparation of unique TiO₂/Cu₂O nanocomposite with highly efficient photocatalytic reactivity under visible-light irradiation

Cited by 14 publications

References 64 publications

Plant-Mediated Biosynthesis and Photocatalysis Activities of Zinc Oxide Nanoparticles: A Prospect towards Dyes Mineralization

Plant-Mediated Biosynthesis and Photocatalysis Activities of Zinc Oxide Nanoparticles: A Prospect towards Dyes Mineralization

Self-Assembled Sandwich-like MXene-Derived Composites as Highly Efficient and Sustainable Catalysts for Wastewater Treatment

Fabrication and Characterization of p-Cu2O on n-TiO2 Layer by Electrodeposition Method for Heterojunction Solar Cells Development

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A study on preparation of unique TiO2/Cu2O nanocomposite with highly efficient photocatalytic reactivity under visible-light irradiation

Cited by 14 publications

References 64 publications

Plant-Mediated Biosynthesis and Photocatalysis Activities of Zinc Oxide Nanoparticles: A Prospect towards Dyes Mineralization

Plant-Mediated Biosynthesis and Photocatalysis Activities of Zinc Oxide Nanoparticles: A Prospect towards Dyes Mineralization

Self-Assembled Sandwich-like MXene-Derived Composites as Highly Efficient and Sustainable Catalysts for Wastewater Treatment

Fabrication and Characterization of p-Cu2O on n-TiO2 Layer by Electrodeposition Method for Heterojunction Solar Cells Development

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A study on preparation of unique TiO₂/Cu₂O nanocomposite with highly efficient photocatalytic reactivity under visible-light irradiation