High efficiency degradation of 2,4-dichlorophenol using Cu2S/Cu2O decorated nanoscale zerovalent iron via adsorption and photocatalytic performances

Qin, Hongjuan; Wang, Zhen; Yang, Shaocong; Gu, Yawei; Chen, Jiachuan; Yang, Guihua

doi:10.1016/j.jclepro.2022.134587

Cited by 15 publications

(2 citation statements)

References 83 publications

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“…3.0, the MB removal is greater than at pH 7.0 with kapp values of 0.0347 and 0.00722 min −1 , respectively (Figure 10d). Similar effects with respect to pH have been detected in systems that include the use of Cu2O for Fenton-like reactions [2,20,[82][83][84][85]. The reasons that have been attributed to the greater degradation of contaminants in Fenton-like systems using Cu2O are varied: (i) at acidic pH, the dissolution of Cu2O is favored, forming Cu(I) ions that react quickly with H2O2 to produce •OH according to Equation (1) [20,[82][83][84]; (ii) H2O2 could decompose at high pH, preventing it from reacting and forming •OH [20,85]; and (iii) •OH could react with OH − ions, decreasing the availability of •OH to degrade MB [86].…”

Section: Photocatalytic and Fenton-like Degradation Of Mbsupporting

confidence: 60%

In Situ Synthesis of Cu2O Nanoparticles Using Eucalyptus globulus Extract to Remove a Dye via Advanced Oxidation

Salgado,

Rubilar,

Salazar

et al. 2024

Nanomaterials

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Water pollution, particularly from organic contaminants like dyes, is a pressing issue, prompting exploration into advanced oxidation processes (AOPs) as potential solutions. This study focuses on synthesizing Cu2O on cellulose-based fabric using Eucalyptus globulus leaf extracts. The resulting catalysts effectively degraded methylene blue through photocatalysis under LED visible light and heterogeneous Fenton-like reactions with H2O2, demonstrating reusability. Mechanistic insights were gained through analyses of the extracts before and after Cu2O synthesis, revealing the role of phenolic compounds and reducing sugars in nanoparticle formation. Cu2O nanoparticles on cellulose-based fabric were characterized in terms of their morphology, structure, and bandgap via SEM-EDS, XRD, Raman, FTIR, UV–Vis DRS, and TGA. The degradation of methylene blue was pH-dependent; photocatalysis was more efficient at neutral pH due to hydroxyl and superoxide radical production, while Fenton-like reactions showed greater efficiency at acidic pH, primarily generating hydroxyl radicals. Cu2O used in Fenton-like reactions exhibited lower reusability compared to photocatalysis, suggesting deterioration. This research not only advances understanding of catalytic processes but also holds promise for sustainable water treatment solutions, contributing to environmental protection and resource conservation.

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Section: Photocatalytic and Fenton-like Degradation Of Mbsupporting

confidence: 60%

In Situ Synthesis of Cu2O Nanoparticles Using Eucalyptus globulus Extract to Remove a Dye via Advanced Oxidation

Salgado,

Rubilar,

Salazar

et al. 2024

Nanomaterials

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“…In Figure 5D, it can be seen that the high‐resolution O 1 s peaks are divided into three overlapping peaks. The three peaks of O 1 s at 530.34, 531.47, and 533 eV belong to M–O bond, defect site, and −OH group, respectively 54,55 …”

Section: Resultsmentioning

confidence: 99%

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Xu,

Qiao,

Liu

et al. 2024

Battery Energy

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Cu(OH)2 has the advantages of ease of structural regulation, good conductivity, and relatively low cost, making it a suitable candidate material for use as an electrocatalyst. However, its catalytic efficiency and stability still need to be improved further. Therefore, Cu(OH)2/Cu2S was successfully prepared on copper foam (CF) using the in situ growth and hydrothermal method. The structural characterization showed that sulfidation treatment induced transformation of Cu(OH)2/CF from smooth nanorods into a coral‐like structure, which exposed more active sites of Cu(OH)2/Cu2S and enhanced the performance of electrocatalytic hydrogen evolution reaction (HER). Compared with Cu(OH)2, Cu(OH)2/Cu2S showed better alkaline HER performance, especially when the vulcanization concentration was 0.1 M, the overpotential of Cu(OH)2/Cu2S was 174 mV, and the reaction kinetics was 64 mv dec−1 at a current density of 10 mA cm−2. In this work, the morphology and electronic structure of copper‐based metal sulfide electrocatalysts were adjusted by sulfide treatment, which provided a new reference for improving HER performance.

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Visible light-induced H2 production and pollutant degradation by copper oxide nanosphere embedded zinc-cadmium-sulfide composite

Imran,

Yousaf,

Farooq

et al. 2024

emergent mater.

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Green hydrogen production using solar water splitting and solving water pollution issues are intricately intertwined global goals which are hindered by the scarcity of highly active photocatalytic materials. Herein, we have presented a simple strategy to couple two semiconductors (Cu2O and ZnCdS) to form a type-I heterojunction with high visible light response. The as-synthesized heterojunction was well characterized by the battery techniques, such as TEM, HAADF-STEM elemental mapping, XRD and XPS. The visible light response was higher for composite than individual components, as was also supported by UV–vis DRS. The Cu2O-ZnCdS composite showed a higher visible light-driven photocatalytic H2 production rate (78.5 µmol g–1 h–1). The catalyst was also active for photocatalytic degradation of a model dye-methylene blue (MB)-with a degradation rate constant of 0.079 min−1. The enhanced performance of the Cu2O-loaded ZnCdS catalysts can be ascribed to both factors, such as enhancement of the visible light absorption and the growth of Cu2O-ZnCdS heterojunction. The heterojunction formation facilitates efficient charge separation with smaller charge resistance, as evidenced by transient photocurrent response and electrochemical impedance spectroscopy (EIS) studies. This study strongly indicates that the photocatalytic reactions with this catalyst material are kinetically favoured by coupling the two semiconductors. Graphical abstract

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High efficiency degradation of 2,4-dichlorophenol using Cu2S/Cu2O decorated nanoscale zerovalent iron via adsorption and photocatalytic performances

Cited by 15 publications

References 83 publications

In Situ Synthesis of Cu2O Nanoparticles Using Eucalyptus globulus Extract to Remove a Dye via Advanced Oxidation

In Situ Synthesis of Cu2O Nanoparticles Using Eucalyptus globulus Extract to Remove a Dye via Advanced Oxidation

Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction

Visible light-induced H2 production and pollutant degradation by copper oxide nanosphere embedded zinc-cadmium-sulfide composite

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High efficiency degradation of 2,4-dichlorophenol using Cu2S/Cu2O decorated nanoscale zerovalent iron via adsorption and photocatalytic performances

Cited by 15 publications

References 83 publications

In Situ Synthesis of Cu2O Nanoparticles Using Eucalyptus globulus Extract to Remove a Dye via Advanced Oxidation

In Situ Synthesis of Cu2O Nanoparticles Using Eucalyptus globulus Extract to Remove a Dye via Advanced Oxidation

Preparation of Cu(OH)2/Cu2S arrays for enhanced hydrogen evolution reaction

Visible light-induced H2 production and pollutant degradation by copper oxide nanosphere embedded zinc-cadmium-sulfide composite

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Preparation of Cu(OH)₂/Cu₂S arrays for enhanced hydrogen evolution reaction