Polyhedral Co3O4@ZnO nanostructures as proficient photocatalysts for vitiation of organic dyes from waste water

Hussain, Shahid; Farooq, Nosheen; Alkorbi, Ali S.; Alsaiari, Raiedhah; Alhemiary, Nabil A.; Wang, Mingsong; Qiao, Guanjun

doi:10.1016/j.molliq.2022.119765

Cited by 48 publications

(10 citation statements)

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“…Until now, various forms of metal oxides and composites have been utilized as photocatalysts for the removal of various organic dye contaminants [ 12 ]. However, this type of catalyst is subjected to recombination of electron and hole pairs, easy clustering, and low energy consumption [ 13 ]. Therefore, with the widespread awareness on human health and environmental protection, green technologies to remove pollutants from wastewater at low cost and high efficacy are in huge demand [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Development of MOF Based Recyclable Photocatalyst for the Removal of Different Organic Dye Pollutants

et al. 2023

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The preparation of metal organic frameworks (MOFs) has come to the forefront in recent years because of their outstanding physical and chemical properties. Many MOFs such as Zn, Co, Ni, Fe, and Ag, etc., have been successfully synthesized. In this work, we followed the solvothermal assisted route to synthesize Ag-MOF (abbreviated as AMOF) nanosheets and then applied them as a photocatalyst to remove different organic pollutants, namely methyl orange (MO), crystal violet (CV), and methylene blue (MB). Chemical composition, optical properties, morphology, and microstructural analysis were analyzed using XPS, UV-visible spectrophotometer, FESEM, TEM, and EDS, respectively. The structural properties of AMOF nanosheets were studied by X-ray diffraction (XRD). Nitrogen adsorption and desorption isotherm analysis were utilized to evaluate the specific surface area and pore size of the AMOF nanosheets. Further, AMOF nanosheets showed notable photocatalytic performance for various dye pollutants degradation. The results confirmed 74.5, 85.5, and 90.7% of MO, CV, and MB dye pollutants removal after 120 min of irradiation with the rate constants (k) of 0.0123, 0.0153, and 0.0158 min−1, respectively. The effect of superoxide radicals (O2−) and photogenerated holes (h+) on the organic dye pollutants removal was investigated using radical scavenger trapping studies. Moreover, the stability study also confirmed the recyclability of the photocatalyst. Therefore, the findings of this research present a realizable method to grow AMOF photocatalyst for successful degradation of various dye pollutants.

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Section: Introductionmentioning

confidence: 99%

Development of MOF Based Recyclable Photocatalyst for the Removal of Different Organic Dye Pollutants

et al. 2023

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“… 83 Hussain et al investigated the MB dye degradation performance of the metal organic framework-derived Co 3 O 4 @ZnO nanomaterial, and they reached 55% MB degradation at 80 min reaction time under visible light irradiation. 84 When compared with the literature studies, it is obviously seen that promising results were obtained with the doped nanofibers containing anatase TiO 2 calcined at 650 and 750 °C under both UV and sunlight irradiation.…”

Section: Resultsmentioning

confidence: 81%

“…Sanguino et al studied MB photocatalytic degradation under visible light, and they resulted in the photocatalytic degradation rate constant as 100 times higher than the bare TiO 2 (5 × 10 −5 min −1 ). 84 When compared with the literature studies, it is obviously seen that promising results were obtained with the doped nanofibers containing anatase TiO 2 calcined at 650 and 750 °C under both UV and sunlight irradiation.…”

Section: Hr-tem Analysismentioning

confidence: 81%

“…Abdi et al added ZrO 2 to the TiO 2 structure for the photodegradation of Rhodamine B, and they reached the first-order rate constants as 0.0036 min –1 for pure TiO 2 and 0.013 min –1 for the TiO 2 /ZrO 2 photocatalyst at 180 min . Hussain et al investigated the MB dye degradation performance of the metal organic framework-derived Co 3 O 4 @ZnO nanomaterial, and they reached 55% MB degradation at 80 min reaction time under visible light irradiation . When compared with the literature studies, it is obviously seen that promising results were obtained with the doped nanofibers containing anatase TiO 2 calcined at 650 and 750 °C under both UV and sunlight irradiation.…”

Section: Resultsmentioning

confidence: 99%

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Photocatalytic and Antimicrobial Properties of Electrospun TiO₂–SiO₂–Al₂O₃–ZrO₂–CaO–CeO₂ Ceramic Membranes

Soylu

Dikmetaş

et al. 2023

ACS Omega

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In this study, TiO 2 -based ceramic nanofiber membranes in the system of TiO 2 −SiO 2 −Al 2 O 3 −ZrO 2 −CaO− CeO 2 were synthesized by combining sol−gel and electrospinning processes. In order to investigate the thermal treatment temperature effect, the obtained nanofiber membranes were calcined at different temperatures ranging from 550 to 850 °C. Different characterization methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), and high-resolution transmission electron microscopy (HR-TEM) were conducted on the obtained membranes to investigate the structural and morphological properties of the nanofibers. The Brunauer−Emmett−Teller surface area of the nanofiber membranes was very high (46.6−149.2 m 2 /g) and decreased with increasing calcination temperature as expected. Photocatalytic activity investigations were determined using methylene blue (MB) as a model dye under UV and sunlight irradiation. High degradation performances were achieved with the calcination temperatures of 650 and 750 °C because of the high specific surface area and the anatase structure of the nanofiber membranes. Moreover, the ceramic membranes showed antibacterial activity against Escherichia coli as a Gram-negative bacterium and Staphylococcus aureus as a Gram-positive bacterium. The superior properties of the novel TiO 2 -based multi-oxide nanofiber membranes proved as a promising candidate for various industries, especially the removal of textile dyes from wastewater.

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“…[13][14][15][16] Because 2D carbon-based materials are highly sensitive to gases owing to their intrinsic electrical properties, hybrid layers based on 2D TMDs and graphene with high electron transfer rates and surface-to-volume ratios were utilized to enhance electrochemical and sensing behaviors. [17][18][19] One-dimensional carbon nanostructures such as carbon nanotubes (CNTs), graphene oxide (GO), and reduced graphene oxide (rGO) were explored for application as gas sensors. Carbon-based materials have large surface areas for adsorbing gas molecules and high strength and stability.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of gas sensors based on molybdenum disulfide nanosheets and carbon nanotubes by self-assembly

et al. 2023

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Polyhedral Co3O4@ZnO nanostructures as proficient photocatalysts for vitiation of organic dyes from waste water

Cited by 48 publications

References 50 publications

Development of MOF Based Recyclable Photocatalyst for the Removal of Different Organic Dye Pollutants

Development of MOF Based Recyclable Photocatalyst for the Removal of Different Organic Dye Pollutants

Photocatalytic and Antimicrobial Properties of Electrospun TiO₂–SiO₂–Al₂O₃–ZrO₂–CaO–CeO₂ Ceramic Membranes

Facile fabrication of gas sensors based on molybdenum disulfide nanosheets and carbon nanotubes by self-assembly

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Polyhedral Co3O4@ZnO nanostructures as proficient photocatalysts for vitiation of organic dyes from waste water

Cited by 48 publications

References 50 publications

Development of MOF Based Recyclable Photocatalyst for the Removal of Different Organic Dye Pollutants

Development of MOF Based Recyclable Photocatalyst for the Removal of Different Organic Dye Pollutants

Photocatalytic and Antimicrobial Properties of Electrospun TiO2–SiO2–Al2O3–ZrO2–CaO–CeO2 Ceramic Membranes

Facile fabrication of gas sensors based on molybdenum disulfide nanosheets and carbon nanotubes by self-assembly

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Photocatalytic and Antimicrobial Properties of Electrospun TiO₂–SiO₂–Al₂O₃–ZrO₂–CaO–CeO₂ Ceramic Membranes