Photocatalytic degradation of crystal violet over semiconductor zinc oxide powder suspended in aqueous solution

Rao, Pratibha; Patel, G. S.; Sharma, Shweta; Ameta, Suresh C.

doi:10.1080/02772249709358460

Cited by 13 publications

(5 citation statements)

References 8 publications

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“…In particular, the organic impurities in contact with photocatalyst surface could act as radical scavengers, influencing the charge recombination process [57,58] and hence worsening the photocatalytic activity of ZnOac500 with respect to ZnOsas500 photocatalyst. It is worthwhile to note that the photocatalytic performances achieved with ZnOsas500 photocatalyst were better than those reported in some research papers dealing with the photocatalytic degradation of CV dye using ZnO nanoparticles under UV irradiation [59,60]. In particular, it was evidenced that the complete CV decolorization was achieved for irradiation times generally higher than 80 min.…”

Section: Photocatalytic Activity Resultsmentioning

confidence: 59%

Zinc Oxide Nanoparticles Obtained by Supercritical Antisolvent Precipitation for the Photocatalytic Degradation of Crystal Violet Dye

et al. 2019

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In this work, the synthesis of zinc oxide (ZnO) photocatalyst from thermal decomposition of zinc acetate (ZnAc) nanoparticles obtained by supercritical antisolvent (SAS) precipitation was investigated. The optimization of calcination conditions of the SAS ZnAc was carried out, studying the effect of temperature (in the range 300–600 °C) on the production of ZnO nanoparticles. In particular, it was demonstrated that the organic residues in ZnO and its particle size, thus the specific surface area, strongly affect the photocatalytic performances. SAS micronization of ZnAc produces regular nanoparticles with a mean diameter of about 54.5 ± 11.5 nm, whereas unprocessed ZnAc is characterized by very large crystals. The experimental results evidenced that ZnAc prepared by SAS process calcined at 500 °C showed a regular nanometric structure (mean diameter: 65.0 ± 14.5 nm) and was revealed to be the best choice for the photocatalytic removal of crystal violet dye (CV). In fact, the photocatalytic activity performances of ZnO nanoparticles prepared by this route were higher with respect to that of ZnO from unprocessed ZnAc calcined at 500 °C (which is characterized by irregular tetrapods with mean size 181.1 ± 65.5 nm). The optimized photocatalyst was able to assure the complete CV decolorization in 60 min of UV irradiation time and a mineralization degree higher than 90% after 120 min of treatment time.

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Section: Photocatalytic Activity Resultsmentioning

confidence: 59%

Zinc Oxide Nanoparticles Obtained by Supercritical Antisolvent Precipitation for the Photocatalytic Degradation of Crystal Violet Dye

et al. 2019

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“…At neutral pH conditions, Cheng et al (2004) found striking photo-aided dye pollution degradation over Fe (III)-loaded resin. According to Rao et al (1997), crystal violet was bleached photo catalytically in an aqueous solution of zinc oxide.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Titanium Dioxide and Nickel Vanadate on Azure B Dye With Photocatalytic Degradation

A. VYAS,

SHORGAR,

MEHTA

2023

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“…Therefore, the removal of CV dye from waste water is of great concern. [26] For the first time, photocatalytic degradation of CV over ZnO suspended in aqueous solution was carried out by Rao et al [27] After this work, different types of oxide semiconductors such as TiO 2 , [28] ZnO, [29] SnO 2 , [29] Co 3 O 4 , [30] α-Fe 2 O 3 , [31] In 2 O 3 , [32] BiVO 4 / FeVO 4 , [33] SnO 2 /BiOBr, [34] ZnO/AgBr, [35] rGO/TiO 2 /Co 3 O 4 , [36] and rGO/ZnO/TiO 2 [37] etc were developed and used for photocatalytic degradation of aqueous CV dye.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

2021

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The g-C 3 N 4 /Zn 3 (PO 4 ) 2 composites were synthesized in the aqueous medium via chemical precipitation route. The photocatalytic activity of these photocatalysts was evaluated for the degradation of aqueous crystal violet (CV) dye under solar light. The optimum photocatalytic activity of g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite was found for 30 % weight of g-C 3 N 4 . The comparison experiments showed the photocatalytic activity of the g-C 3 N 4 / Zn 3 (PO 4 ) 2 composite increased 2 times compare to bare Zn 3 (PO 4 ) 2 and 1.5 times of g-C 3 N 4 . The enhanced photocatalytic activity originates due to the transfer of photogenerated electrons from the conduction band of g-C 3 N 4 to the Zn 3 (PO 4 ) 2 which makes well-separated electron-hole pairs. The degradation capacity increases with an increase in the pH of the solution up to 8 and then decreases up to 10 and then again starts increasing. The addition of scavengers decreases degradation capacity of g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite in the order of Ethylene diamine tetra-acetic acid-Na 2 (EDTA) > tert-butyl alcohol (TBA) > L-ascorbic acid (AA). The degradation of CV over g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite mainly attributed by the holes. The interfering anions (except Br À ) decrease the degradation capacity of Zn 3 (PO 4 ) 2 whereas in the case of composite no change in the degradation capacity was observed. The recycling experiment for the degradation of CV dye was performed on bare Zn 3 (PO 4 ) 2 and g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite and found better stability and recyclability of the composite material.

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Photocatalytic degradation of crystal violet over semiconductor zinc oxide powder suspended in aqueous solution

Cited by 13 publications

References 8 publications

Zinc Oxide Nanoparticles Obtained by Supercritical Antisolvent Precipitation for the Photocatalytic Degradation of Crystal Violet Dye

Zinc Oxide Nanoparticles Obtained by Supercritical Antisolvent Precipitation for the Photocatalytic Degradation of Crystal Violet Dye

Interaction of Titanium Dioxide and Nickel Vanadate on Azure B Dye With Photocatalytic Degradation

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

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Photocatalytic degradation of crystal violet over semiconductor zinc oxide powder suspended in aqueous solution

Cited by 13 publications

References 8 publications

Zinc Oxide Nanoparticles Obtained by Supercritical Antisolvent Precipitation for the Photocatalytic Degradation of Crystal Violet Dye

Zinc Oxide Nanoparticles Obtained by Supercritical Antisolvent Precipitation for the Photocatalytic Degradation of Crystal Violet Dye

Interaction of Titanium Dioxide and Nickel Vanadate on Azure B Dye With Photocatalytic Degradation

Synthesis of g‐C3N4, Zn3(PO4)2 and g‐C3N4/Zn3(PO4)2 Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

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Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light