Improvement of the photocatalytic activity of cupric oxide by deposition onto a natural clinoptilolite substrate

Amiri, Mehdi; Nezamzadeh‐Ejhieh, Alireza

doi:10.1016/j.mssp.2014.12.030

Cited by 31 publications

(6 citation statements)

References 43 publications

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“…As shown, the E CB of CoO is of a more negative potential (−1.36 eV) than that of Ag 2 O (0.29 eV), which will cause the photogenerated electrons to migrate from the conduction band of CoO to that of Ag 2 O. In contrast, the holes will transfer from the valence band of Ag 2 O to that of CoO because the E VB of Ag 2 O is of a more positive potential than that of CoO. − Therefore, the transfer of these charge carriers will result in the accumulation of the photogenerated electrons on the CB of Ag 2 O and the photogenerated holes on the VB of CoO. The accumulated electrons on the CB of Ag 2 O will eventually achieve the photocatalytic reduction of p -NP and Cr(IV).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Dandelion-like p–p Type Heterostructure of Ag₂O@CoO for Bifunctional Photoelectrocatalytic Performance

Yang

et al. 2020

Langmuir

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A novel three-dimensional purple dandelion-like hierarchical Ag2O@CoO heterojunction with an appropriate redox potential was constructed by chemical precipitation of Ag2O nanoparticle on flower-like CoO. By feat of this hierarchical structure, the Ag2O@CoO photocathode showed significantly high photoelectroreduction activities toward p-nitrophenol (p-NP) and Cr(VI). The high performance of Ag2O@CoO was mainly attributed to the specific structural characteristics and synergistic effect of each chemical component. This hierarchical structure could effectively increase the specific surface area, provide more exposed active edges, and be beneficial for multiple light reflection/scattering channels and light utilization efficiency. The introduction of Ag2O optimized the composition and further improved the band structure, resulting in an improved separation of photogenerated electrons and holes. The unique photocathode achieves a removal efficiency of 86% for photoelectrocatalytic p-NP degradation after 120 min and 95% for Cr(VI) after 40 min under visible light irradiation with excellent stability. This research provided a simple way for the synthesis of photoelectrocatalytic material with potential applications in the field of environmental governance with visible light illumination.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Dandelion-like p–p Type Heterostructure of Ag₂O@CoO for Bifunctional Photoelectrocatalytic Performance

Yang

et al. 2020

Langmuir

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“…Especially the nonstoichiometric p-type CuO with a narrow band gap (about 1.7 eV) is easy to adsorb oxygen molecules forming oxygen vacancies, and then generate reactive oxygen species, thereby it is extensively used in various applications such as catalysis [14,15], gas sensors [16], biological applications [17] and solar energy transformation [18][19][20]. However, so far, the study of using copper oxide modified silver bromide has not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Wang

Zhang

Liu

et al. 2015

Materials Science in Semiconductor Processing

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“…The random discharge of PAP into the environment will cause potential threats to human health, such as heart shock and mutagen [104]. Moreover, benzene-1,2-diamine (BD) [156], 2,6-dimethyl phenol (DMP) [157], and dichloroaniline (DCA) [158] were chosen as target pollutants to study the photocatalysis properties of the CuO/CP. All these organics are not easy to decompose and will also cause a series of environmental problems.…”

Section: Degradation Of Other Emerging Organic Pollutantsmentioning

confidence: 99%

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

Zhou,

Wang,

Shen

et al. 2024

Catalysts

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One of the most challenging problems for people around the world is the lack of clean water. In the past few decades, the massive discharge of emerging organic pollutants (EOPs) into natural water bodies has exacerbated this crisis. Considerable research efforts have been devoted to removing these EOPs due to their biotoxicity at low concentrations. Heterogeneous photocatalysis via coupling clay minerals with nanostructured semiconductors has proven to be an economical, efficient, and environmentally friendly technology for the elimination of EOPs in drinking water and watershed water. Natural zeolite minerals (especially clinoptilolites) are regarded as appropriate supports for semiconductor-based photocatalysts due to their characteristics of having a low cost, environmental friendliness, easy availability, co-catalysis, etc. This review summarizes the latest research on clinoptilolites used as supports to prepare binary and ternary metal oxide or sulfide semiconductor-based hybrid photocatalysts. Various preparation methods of the composite photocatalysts and their degradation efficiencies for the target contaminants are introduced. It is found that the good catalytic activity of the composite photocatalyst could be attributed to the synergistic effect of combining the clinoptilolite adsorbent with the semiconductor catalyst in the heterogeneous system, which could endow the composites with an excellent adsorption capacity and produce more e−/h+ pairs under suitable light irradiation. Finally, we highlight the serious threat of EOPs to the ecological environment and propose the current challenges and limitations, before putting the zeolite mineral composite photocatalysts into practice. The present work would provide a theoretical basis and scientific support for the application of zeolite-based photocatalysts for degrading EOPs.

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Improvement of the photocatalytic activity of cupric oxide by deposition onto a natural clinoptilolite substrate

Cited by 31 publications

References 43 publications

Fabrication of Dandelion-like p–p Type Heterostructure of Ag₂O@CoO for Bifunctional Photoelectrocatalytic Performance

Fabrication of Dandelion-like p–p Type Heterostructure of Ag₂O@CoO for Bifunctional Photoelectrocatalytic Performance

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

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Improvement of the photocatalytic activity of cupric oxide by deposition onto a natural clinoptilolite substrate

Cited by 31 publications

References 43 publications

Fabrication of Dandelion-like p–p Type Heterostructure of Ag2O@CoO for Bifunctional Photoelectrocatalytic Performance

Fabrication of Dandelion-like p–p Type Heterostructure of Ag2O@CoO for Bifunctional Photoelectrocatalytic Performance

Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water

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Fabrication of Dandelion-like p–p Type Heterostructure of Ag₂O@CoO for Bifunctional Photoelectrocatalytic Performance

Fabrication of Dandelion-like p–p Type Heterostructure of Ag₂O@CoO for Bifunctional Photoelectrocatalytic Performance