Synthesis and process parametric effects on the photocatalyst efficiency of CuO nanostructures for decontamination of toxic heavy metal ions

Sibhatu, Assefu Kassegn; Weldegebrieal, Getu Kassegn; Imteyaz, Shahla; Sagadevan, Suresh; Tran, Nam Nghiep; essel, Volker

doi:10.1016/j.cep.2022.108814

Cited by 27 publications

(7 citation statements)

References 110 publications

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“…95 Excessive loading may hinder performance due to factors such as increased light scattering and reduced accessibility of the surface area. 96 The preceding discussion proposes a potential explanation for the comparatively inferior performance of the ZnO/GO nanocomposite film obtained in this study when compared with the literature presented in Table 2. The photocatalytic efficiency of ZnO nanoflakes and ZnO/GO nanocomposite films exhibits an almost linear trend due to the generation of oxidative radicals that can synergistically interact with MB dye molecules.…”

Section: Resultsmentioning

confidence: 57%

Investigating the synergistic effect of ZnO/GO nanocomposite films for methylene blue removal

Yildirim,

Canpolat,

Aydogan

et al. 2024

J Am Ceram Soc.

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This study aims to reveal the growth kinetics of ZnO nanoflakes and ZnO/GO nanocomposite films obtained at different Zn precursor salt concentrations by electrochemical deposition method and to evaluate the catalytic performances of the obtained films. The films were grown on FTO substrate with Zn precursor salt concentrations of 0.1 M, 0.125 M, and 0.175 M. Characterization of the obtained films was performed by XRD, SEM, UV–vis–NIR, Raman, and XPS analyses. The strong photocatalytic capabilities of the synthesized ZnO nanoflakes and ZnO/GO nanocomposite films were demonstrated by comparative analyses with the existing literature. Accordingly, photocatalytic experiments carried out under UVA irradiation revealed the high performance of the synthesized samples in the degradation of MB dye. The reaction kinetics were investigated using the Langmuir‐Hinshelwood kinetic model, resulting in high kobs values and R2 coefficients. ZnO nanoparticles showed a kobs of 0.038 min−1 and an R2 value of 0.96, while ZnO/GO nanocomposite films showed a kobs of 0.055 min−1 and an R2 value of 0.92. The significant increase in the degradation percentage shows the significant improvement achieved by the integration of GO, despite a slightly lower R2 value for the ZnO/GO nanocomposite film compared with ZnO nanoflakes films.

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Section: Resultsmentioning

confidence: 57%

Investigating the synergistic effect of ZnO/GO nanocomposite films for methylene blue removal

Yildirim,

Canpolat,

Aydogan

et al. 2024

J Am Ceram Soc.

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“…Traditionally, membrane filtration, reverse osmosis (RO), adsorption (Ad), photocatalytic reduction coagulation, flocculation, flotation, ion exchange (IX), chemical precipitation, electrochemical reduction, etc. are popularly used for heavy metal irons removal as shown in Figure . Although those technologies were reported to be effective for wastewater treatment, their disadvantages in terms of environmental impacts and huge sludge generation during treatment, causing the additional cost of processing and transportation, cannot be ignored …”

Section: Introductionmentioning

confidence: 99%

“…are popularly used for heavy metal irons removal as shown in Figure 1. 5 Although those technologies were reported to be effective for wastewater treatment, their disadvantages in terms of environmental impacts and huge sludge generation during treatment, causing the additional cost of processing and transportation, cannot be ignored. 6 The development of these wastewater treatment processes is largely driven by rising environmental awareness together with more stringent regulatory requirements.…”

Section: Introductionmentioning

confidence: 99%

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Process Technology and Sustainability Assessment of Wastewater Treatment

Tran

Escribà‐Gelonch

Sarafraz

et al. 2023

Ind. Eng. Chem. Res.

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Removal of heavy metals in wastewater treatment is crucial to protect the environment, wildlife, and human health. Various techniques have been developed focusing on removal of heavy metal ions, pharmaceuticals, and other contaminants from different wastewater sources. The main methods include adsorption, filtration, ion exchange, electrochemical, reverse osmosis, precipitation, flotation/coagulation/ flocculation, and photocatalytic-based treatments. This paper comprehensively assesses the sustainability of those common technologies used for wastewater process treatment. The sustainability profile depends mostly on the exact approach followed for each technology, including its energy consumption, type of radiation (where appropriate), auxiliary materials used (e.g., catalysts, adsorbents), and further specific experimental process settings. Thus, while sustainability inevitably provides a multifaceted answer, the review finally aims for sustainability benchmarking of all technologies, by compressing the manifold outcomes toward a compact information set, such as a table and radar plot.

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“…Recently, visible light-induced heterogeneous photocatalysis developed rapidly, due to its advantage in the implementation of environmental remediation, particularly in wastewater treatment [3]. Nowadays, anthropogenic chemicals used in agriculture, medicine, the military, and industry directly enter the water stream easily, which causes an adverse effect on the environment, and risks the contamination of both surface and groundwater [4]. As a result of this water contamination, endocrine disruptors interfere with the normal hormonal system, which causes adverse health effects such as birth defects and developmental disorders in children, infertility, and cancerous tumors, and also causes several water-borne diseases.…”

Section: Introductionmentioning

confidence: 99%

Current Developments in the Effective Removal of Environmental Pollutants through Photocatalytic Degradation Using Nanomaterials

et al. 2022

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Photocatalysis plays a prominent role in the protection of the environment from recalcitrant pollutants by reducing hazardous wastes. Among the different methods of choice, photocatalysis mediated through nanomaterials is the most widely used and economical method for removing pollutants from wastewater. Recently, worldwide researchers focused their research on eco-friendly and sustainable environmental aspects. Wastewater contamination is one of the major threats coming from industrial processes, compared to other environmental issues. Much research is concerned with the advanced development of technology for treating wastewater discharged from various industries. Water treatment using photocatalysis is prominent because of its degradation capacity to convert pollutants into non-toxic biodegradable products. Photocatalysts are cheap, and are now emerging slowly in the research field. This review paper elaborates in detail on the metal oxides used as a nano photocatalysts in the various type of pollutant degradation. The progress of research into metal oxide nanoparticles, and their application as photocatalysts in organic pollutant degradation, were highlighted. As a final consideration, the challenges and future perspectives of photocatalysts were analyzed. The application of nano-based materials can be a new horizon in the use of photocatalysts in the near future for organic pollutant degradation.

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Synthesis and process parametric effects on the photocatalyst efficiency of CuO nanostructures for decontamination of toxic heavy metal ions

Cited by 27 publications

References 110 publications

Investigating the synergistic effect of ZnO/GO nanocomposite films for methylene blue removal

Investigating the synergistic effect of ZnO/GO nanocomposite films for methylene blue removal

Process Technology and Sustainability Assessment of Wastewater Treatment

Current Developments in the Effective Removal of Environmental Pollutants through Photocatalytic Degradation Using Nanomaterials

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