Rapid visible light-driven photocatalytic degradation using Ce-doped ZnO nanocatalysts

Sukriti,; Chand, Prakash; Singh, Vishal; Kumar, Devendra

doi:10.1016/j.vacuum.2020.109364

Cited by 49 publications

(17 citation statements)

References 43 publications

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“…where, α, hν, A and E g are optical absorption coefficient, the energy of the incident photon in eV, constant and optical band gap energy in eV 31 . A graph plotted between [αhν] 2 vs. energy and the optical energy band gap obtained by the extrapolation of the linear area of the plot [αhν] 2 = 0, is shown in Figure 8a (insert) 32 .…”

Section: Characterizationmentioning

confidence: 99%

Magnetic Particles Nanorod of ZnO/CuFe2O4 Prepared by Green Synthesized Approach: Structural, Optical and Magnetic Properties, and Photocatalytic Activity

et al. 2022

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In this study, magnetically separable ZnO/CuFe 2 O 4 nanorod particles were synthesized by the green synthesis approach, using rambutan peel extract (Nephelium lappaceum L.) as a capping agent. The samples were evaluated as photocatalyst for the degradation of Rhodamine B dye driven by solar light irradiation. The XRD patterns represented the specific peaks of ZnO and CuFe 2 O 4 in the ZnO/ CuFe 2 O 4 composite. SEM and TEM images showed the rod-like shape of the ZnO/CuFe 2 O 4 composite synthesized using 3 mL (ZCuE3N) of rambutan peel extract. ZCuE3N sample has an increase in photocatalytic activity up to 98.8% in the degradation of Rhodamine B under solar light irradiation for 2 h. Magnetic measurement by VSM revealed that ZnO/CuFe 2 O 4 composite was superparamagnetic. ZnO/CuFe 2 O 4 composites remained stable in an air atmosphere and exhibited promise as a reusable photocatalyst as it can be easily separated from the solution by an external magnetic field.

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Section: Characterizationmentioning

confidence: 99%

Magnetic Particles Nanorod of ZnO/CuFe2O4 Prepared by Green Synthesized Approach: Structural, Optical and Magnetic Properties, and Photocatalytic Activity

et al. 2022

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“…On the other hand, OHderived from the decomposition of water molecules reacted with the hole (h + ) in VB through oxidation reactions, forming OH• radicals. Furthermore, OH• radicals attacked the organic pollutants or dyes to form unstable intermediates and broke them down into simple molecules, i.e., water, and carbon dioxide gas [46].…”

Section: Rahmayeni Et Almentioning

confidence: 99%

Simbang Darah (Iresine herbstii) extract mediated hydrothermal method in the synthesis of zinc ferrite spinel nanoparticles used for photocatalysis and antibacterial applications

Rahmayeni

Rike

Stiadi

et al. 2021

Journal of Environmental Chemical Engineering

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This paper reports the use of Simbang Darah (Iresine herbstii) leaf extract to synthesize ZnFe 2 O 4 spinel ferrite nanoparticles via hydrothermal method. Biochemical compounds in Simbang Darah leaf extract act as a capping agent and a stabilizer to form nanostructures. XRD patterns and FTIR spectrums confirm the formation of the cubic spinel crystal structure of ZnFe 2 O 4 nanoparticles. SEM and TEM characterization revealed that ZnFe 2 O 4 spinel ferrite morphology has a uniform spherical shape in nanoscale. EDX results showed that the compositional mass ratios were relevant as expected from the synthesis. ZnFe 2 O 4 nanoparticles have an absorption edge in the visible region with Eg values within the range 2.05-2.11 eV in the DRS UV-Vis analysis. The as-prepared samples exhibit paramagnetic behavior according to the magnetic hysteresis curve. ZnFe 2 O 4 nanoparticles were proven effective in direct red 81 dye photodegradation (99.66%) after exposure to solar light irradiation for two hours. On top of that, ZnFe 2 O 4 nanoparticle exhibited antibacterial activity against S. aureus and E. coli.

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“…This novel technique exhibits the advantages of strong oxidizing ability and low cost. Therefore, photocatalytic degradation methods are recommended as environmentally friendly, cheap, and efficient [7,8]. Although the photocatalytic method is costeffective, it has low photocatalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Remarkably Enhanced Photodegradation of Organic Pollutants by NH2-UiO-66/ ZnO Composite under Visible-Light Irradiation

Teng¹,

Zhang²,

Luo³

et al. 2022

Journal of Renewable Materials

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Semiconductor photocatalysis is a novel highly efficient and low-cost method for removing organic pollutants from wastewater. However, the photoreduction performance of semiconductors on organic pollutants is limited due to the weak absorption of visible light caused by its wide band gap and low carrier utilization rate resulting from severe electron-holes recombination. In the present study, flower-like NH 2 -UiO-66 (NU66)/ZnO nanocomposites were prepared using a facile method and exhibited high efficiency under visible light driven photocatalysts. The X-ray diffractometer (XRD), scanning electron microscope (SEM), transmitor electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the prepared samples, indicating that NU66/ZnO was successfully synthesized. The photocatalytic activity of the prepared NU66/ZnO nanocomposites was determined by measuring the photodegradation of methylene blue (MB) and malachite green (MG) under visible-light irradiation. The optimal nanocomposite loading of 5% wt NU66 to NU66/ZnO demonstrated the highest photocatalytic activity for the degradation of MB. The photocatalytic activity of a 5% NU66/ZnO composite was approximately 95-fold and 19-fold higher than that of NU66 and ZnO samples, respectively. The enhanced activity of the 5% wt NU66/ZnO nanocomposite was further confirmed through photoelectrochemical analysis. The formation of type II heterojunctions between the counterparts significantly suppressed recombination of the photogenerated charge carriers. Photocatalytic degradation experiments with different quenchers indicated that the effect of superoxide anion radicals (•O 2 − ) had a greater effect than the other scavengers.Additionally, the improved photocatalytic mechanism underlying the activity of NU66/ZnO nanocomposites was also explored. These findings establish a basis for development of MOF based heterojunction for photocatalytic organic pollution remediation.

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Rapid visible light-driven photocatalytic degradation using Ce-doped ZnO nanocatalysts

Cited by 49 publications

References 43 publications

Magnetic Particles Nanorod of ZnO/CuFe2O4 Prepared by Green Synthesized Approach: Structural, Optical and Magnetic Properties, and Photocatalytic Activity

Magnetic Particles Nanorod of ZnO/CuFe2O4 Prepared by Green Synthesized Approach: Structural, Optical and Magnetic Properties, and Photocatalytic Activity

Simbang Darah (Iresine herbstii) extract mediated hydrothermal method in the synthesis of zinc ferrite spinel nanoparticles used for photocatalysis and antibacterial applications

Remarkably Enhanced Photodegradation of Organic Pollutants by NH2-UiO-66/ ZnO Composite under Visible-Light Irradiation

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