Photodegradation of organic compounds using chromium oxide-doped nano-sulfated zirconia

El-Dafrawy, Shady; Farag, Mervat; Hassan, Shawky M.

doi:10.1007/s11164-017-2993-5

Cited by 10 publications

(3 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the correlation coefficients (R 2 ) are closer to 1, suggesting that the photodegradation of CV and MO dyes fits well with the kinetic model. The value of t 1/2 is inversely proportional to the rate constant, and t 1/2 decreases with increasing rate constant 78–80 …”

Section: Photocatalytic Activitymentioning

confidence: 99%

See 1 more Smart Citation

Photodegradation of cationic and anionic dyes by ZnO and S/ZnO biosynthesized nano‐photocatalysts

Hassan,

Farag,

El‐Dafrawy

2024

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

Photocatalysis is considered a promising and efficient oxidation technique for wastewater treatment. Developing more environmentally biocompatible, simple, effective, and inexpensive photocatalysts enables photocatalysis technology to be at the forefront of wastewater treatments. As an alternative to harmful chemicals, this work focused on the biosynthesis of a variety of ZnO and doped ZnO based on the extract of the brown alga Cystoseira crinite. X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX), Fourier transform‐infrared (FTIR) spectroscopy, and ultraviolet–visible (UV–vis) spectroscopy were used to characterize the structure, phase, morphology, and UV–vis properties of the biosynthesized samples. XRD showed the crystalline structure of ZnO and S‐doped ZnO. SEM analysis revealed agglomerated spherical particles of the prepared samples. EDX analysis confirmed the formation of S‐doped ZnO. FTIR spectra exhibited that phenolic compounds and protein molecules are present in the Cystoseira crinite extract. The photocatalytic efficiency of biosynthesized materials was examined by monitoring the degradation of crystal violet (CV) and methyl orange (MO) dyes, which serve as cationic and anionic dye models, respectively. The various factors that influence the efficacy of the photodegradation process were investigated. In total, 5% S‐doped ZnO decomposed 97.40% and 89.18% of CV and MO dyes, respectively. The dye degradation was most efficient in samples calcined at 500 °C. The photodegradation of CV dye was enhanced at high pH, while the highest photocatalytic activity of MO dye was observed at low pH values. The kinetic study confirmed that the photodegradation follows the first‐order reaction.

show abstract

Section: Photocatalytic Activitymentioning

confidence: 99%

“…The value of t 1/2 is inversely proportional to the rate constant, and t 1/2 decreases with increasing rate constant. [78][79][80] F I G U R E 1 2 Photocatalytic degradation of different initial concentrations of (a) CV and (b) MO dyes over 5% S/ZnO calcined at 500 C (catalyst weight = 50 mg/50 ml).…”

Section: Photocatalytic Kinetic Studymentioning

confidence: 99%

Photodegradation of cationic and anionic dyes by ZnO and S/ZnO biosynthesized nano‐photocatalysts

Hassan,

Farag,

El‐Dafrawy

2024

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

show abstract

“…Various methods such as membrane separation, ltration, distillation, adsorption, biological treatment and photodegradation have been developed for the degradation of pollutants through wastewater treatment [2][3][4]. Among these various methods, photodegradation is found to be the most effective method because of its operational simplicity, complete mineralization and low cost [5][6][7]. Semiconductor metal oxides such ZnO, CuO, WO 3 , NiO, TiO 2 , SnO 2 etc., have been widely used owing to its intense catalytic activity and stability.…”

Section: Introductionmentioning

confidence: 99%

Investigation of metal doped mesoporous TiO2 nanostructures for environmental remediation

Santhi¹,

Harish²,

Navaneethan³

et al. 2021

Preprint

View full text Add to dashboard Cite

In the recent past, metal oxides have attracted the researchers because of their applications in energy and environmental application domains. In the present work, hydrothermal technique used to prepared the Sn doped TiO2 nanoparticles and the effect of Sn concentration has been investigated. The structural, morphological, surface composition, optical and photocatalytic behavior were studied. XRD pattern revealed that doping of Sn makes easy transformation of rutile from anatase phase at lower temperature, providing tetragonal structure of rutile of TiO2. TEM analysis showed the formation of nanoparticles with spherical like morphology with good crystallinity. UV-Vis spectra, it is observed that optical absorption edge gets red shifted upon Sn doping and the band gap is found to be 2.6 eV. The photocatalytic activity of the synthesized nanoparticles has been investigated under visible light irradiation. Experimental results suggested that 0.5 wt % of Sn doped nanoparticles have shown to exhibit improved photocatalytic properties.

show abstract

In situ fluorine doped ZrO2−x nanotubes for efficient visible light photocatalytic activity

Chen

Yang

Zhu

et al. 2018

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Photodegradation of organic compounds using chromium oxide-doped nano-sulfated zirconia

Cited by 10 publications

References 66 publications

Photodegradation of cationic and anionic dyes by ZnO and S/ZnO biosynthesized nano‐photocatalysts

Photodegradation of cationic and anionic dyes by ZnO and S/ZnO biosynthesized nano‐photocatalysts

Investigation of metal doped mesoporous TiO2 nanostructures for environmental remediation

In situ fluorine doped ZrO2−x nanotubes for efficient visible light photocatalytic activity

Contact Info

Product

Resources

About