Structural and optical properties of Cu-doped ZnAl2O4 and its application as photocatalyst for Cr(VI) reduction under sunlight

Akika, F.Z.; Benamira, M.; Lahmar, H.; Trari, M.; Avramova, I.; Süzer, Şefik

doi:10.1016/j.surfin.2019.100406

Cited by 53 publications

(20 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently, AOPs have mostly been replaced by some previously applied water treatment methods because they have strongly succeeded in the degradation of organic pollutants. , Oxidation in AOPs can be either homogeneous or heterogeneous . The homogeneous system is used for some compounds by means of hydrogen peroxide, ozone, and ultraviolet rays, but heterogeneous systems may utilize sunlight/solar light irradiation and semiconductors. − For two main reasons, the heterogeneous photocatalysis by semiconductors is widely applied. First, they consume air as the oxidizing agent, and second, the reaction happens at ambient temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

ZnO Photocatalyst Revisited: Effective Photocatalytic Degradation of Emerging Contaminants Using S-Doped ZnO Nanoparticles under Visible Light Radiation

Mirzaeifard

Shariatinia‬

Jourshabani

et al. 2020

Ind. Eng. Chem. Res.

236

View full text Add to dashboard Cite

Zinc oxide (ZnO) nanoparticles were synthesized by the hydrothermal method and incorporated with diverse amounts of the nonmetal element sulfur (0.5, 0.8, 1.1, 1.3, 2.1, 2.5, 3.2, 6.8, 7.8, 11.9, 12.3, and 17.4 wt %). The physicochemical properties of all nanoparticles were investigated by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, and N2 adsorption/desorption isotherms, as well as Fourier transform infrared, diffuse reflectance, ultraviolet–visible absorption, and photoluminescence (PL) emission spectra. Pure ZnO and 12 S-containing ZnO nanoparticles were examined as photocatalysts for the degradation of the rhodamine B (RhB) contaminant. Among the S-containing samples, 0.10 g of the sample doped with 0.5 wt % S could degrade 100% of RhB (5 ppm) at pH = 5 in 90 min. It was also found that the 0.8 and 1.1 wt % S-doped ZnO samples could degrade 99 and 97% of RhB in 150 min, respectively. The photocatalytic property of the 0.5 wt % S-doped ZnO was improved by adding a small quantity of ammonium persulfate (0.005 g), so that it could degrade 100% of RhB in 60 min but 10 ppm RhB in 210 min. Moreover, the pure ZnO and the optimal 0.5 wt % S-doped ZnO photocatalysts displayed 2 and 53% degradation of the phenol pollutant in 180 min at pH = 5, respectively. The reusability of the 0.5 wt % S-doped ZnO optimal photocatalyst was tested under optimized conditions (catalyst dosage = 0.10 g, pH = 5, and RhB concentration = 5 ppm) for the RhB degradation exhibiting the degradation efficiency was slightly decreased from 100 to 92% after five successive reactions. Thus, such a photocatalyst could be used as a promising material for application in industrial wastewater treatment processes.

show abstract

Section: Introductionmentioning

confidence: 99%

ZnO Photocatalyst Revisited: Effective Photocatalytic Degradation of Emerging Contaminants Using S-Doped ZnO Nanoparticles under Visible Light Radiation

Mirzaeifard

Shariatinia‬

Jourshabani

et al. 2020

Ind. Eng. Chem. Res.

236

View full text Add to dashboard Cite

show abstract

“…disordered) cation distribution [17]. Many synthesis methods preparation of ZnAl2O4 have been reported, such as: hydrothermal [10,18]; citrate [1,19,20], sol-gel [21][22], combustion [13,[23][24][25], pyrolysis [14,26], co-precipitation [15,[27][28][29] and solvothermal [30][31]. While doping ZnAl2O4 was carried out with transition metals or rare earths depending on the intended application [6-7, 14, 32].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the optical and photocatalytic properties of ZnAl2O4: 1% La3+, x% Pb2+ nanoparticles synthesized by citrate sol-gel route

Filali

Boukheit

Bouhroum³

et al. 2021

Preprint

View full text Add to dashboard Cite

Samples of pure zinc aluminate (ZnAl2O4) and doped both with lead (Pb2+) at different ratios (0, 0.5, 1, 1.5, 2 and 2.5% mol) and a constant amount of lanthanum (La: 1% mol), were prepared by the citrate sol-gel technique, and then annealed at 900°C for 2h. In order to study the structural, optical and thermal properties; different characterization methods were used, such as: powder X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), differential scanning calorimetry (DSC), TGA, Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The Analyzes by XRD revealed the presence of the cubic single phase ZnAl2O4 for all samples, with a crystallites size between 19 and 25 nm. These results were confirmed using FTIR, Raman spectroscopy and SEM. Also, photocatalytic study for different samples of ZnAl2O4 shows that they can be used like as photocatalyst and good adsorbents for degradation of Hexamethyl crystallized violet dye in aqueous solution.

show abstract

“…Photocatalysis produces electron-hole pairs and initiates the photoreaction by generating OH free radicals [7,8]. Transition metal oxides such as; TiO2, ZnO, SnO, Fe2O3, Al2O3, Co2O3 and CuO are used as photocatalysts and fuel additives because of their high volume to size ratio, thermal conductivity and surface area [9][10][11][12][13]. However, these metal oxides suffer high bandgap, low quantum efficiency, toxicity, high electron-hole recombination, solar light inactivity and cost inefficiency [14].…”

mentioning

confidence: 99%

Thermodynamic and kinetic study of synthesised graphene oxide-CuO nanocomposites: A way forward to fuel additive and photocatalytic potentials

Sehar

Sher

Zhang

et al. 2020

Journal of Molecular Liquids

View full text Add to dashboard Cite

Structural and optical properties of Cu-doped ZnAl2O4 and its application as photocatalyst for Cr(VI) reduction under sunlight

Cited by 53 publications

References 40 publications

ZnO Photocatalyst Revisited: Effective Photocatalytic Degradation of Emerging Contaminants Using S-Doped ZnO Nanoparticles under Visible Light Radiation

ZnO Photocatalyst Revisited: Effective Photocatalytic Degradation of Emerging Contaminants Using S-Doped ZnO Nanoparticles under Visible Light Radiation

Improvement of the optical and photocatalytic properties of ZnAl2O4: 1% La3+, x% Pb2+ nanoparticles synthesized by citrate sol-gel route

Thermodynamic and kinetic study of synthesised graphene oxide-CuO nanocomposites: A way forward to fuel additive and photocatalytic potentials

Contact Info

Product

Resources

About