SDS capped and PVA capped ZnO nanostructures with high photocatalytic performance toward photodegradation of reactive red (RR141) azo dye

Kakarndee, Saengnapa; Nanan, Suwat

doi:10.1016/j.jece.2017.11.066

Cited by 93 publications

(54 citation statements)

References 62 publications

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“…TiO 2 and ZnO show high efficiency toward degradation of RR14 dye under UV light illumination. 15,35 In contrast, it has been reported that the degradation of RR141 can be achieved by using CdS photocatalyst under visible light irradiation. 21 However, it does take longer time, i.e., about 240 min to reach 95% degradation.…”

Section: Photocatalytic Propertiesmentioning

confidence: 97%

“…As a result, the reduced photo ux will reach the surface of the catalyst causing a decrease in the degradation efficiency. 15,33 The highest initial dye concentration of 20 ppm provided the lowest CR dye degradation efficiency. Using initial dye concentration of either 5 or 10 ppm did not change photodegradation efficiency signicantly over 240 min of irradiation.…”

Section: Photocatalytic Propertiesmentioning

confidence: 99%

“…The high degradation efficiency found in the pH range of 5-7 is due to the enhancement of anionic Congo red (CR) azo dye adsorption on the surface of CdS photocatalyst that carries a positive charge at this pH range. 15,33 However, at a low pH of 3 (highly acidic condition), the CdS catalyst may undergo dissolution. This results in a sharp decrease of degradation efficiency.…”

Section: Photocatalytic Propertiesmentioning

confidence: 99%

“…13 Generally, oxide-based materials such as TiO 2 and ZnO are the most utilized photocatalysts resulting from their promising photocatalytic efficiency and stability. 14,15 However, these catalysts show excellent photoactivity only under UV light irradiation. Generally, it is known that the solar spectrum is composed of 5% UV light and about 43% visible light.…”

Section: Introductionmentioning

confidence: 99%

“…22 The photodegradation efficiency of the CdS catalyst toward degradation of organic dyes such as malachite green, methylene blue (MB), methyl orange (MO), Acid Blue-29, reactive red (RR141), Congo red (CR), and Rhodamine B (RhB) has been investigated. [15][16][17]19,20,[23][24][25][26][27] The photocatalytic reaction of the dyes under visible light, 28,29 UV light 15 and natural solar light irradiation 19 has also been studied.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

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Section: Photocatalytic Propertiesmentioning

confidence: 97%

Section: Photocatalytic Propertiesmentioning

confidence: 99%

Section: Photocatalytic Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

2018

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

Hassan,

Farag,

El‐Dafrawy

2024

Applied Organom Chemis

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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.

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Preparation of a Bi₂MoO₆/Bi₂Sn₂O₇ Composite Photocatalyst and Its Photocatalytic Performance and Toxicity Test

Zhang

Huang

et al. 2022

ChemistrySelect

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In this study, a three-dimensional(3D) hierarchical Bi 2 MoO 6 / Bi 2 Sn 2 O 7 composite photocatalytic material was synthesized by a solvothermal method. It was proved that the photocatalytic activity of Bi 2 MoO 6 /Bi 2 Sn 2 O 7 composites for the degradation of Rhodamine B(RhB) and Tetracycline (TC) was much higher than that of pure Bi 2 MoO 6 and pure Bi 2 Sn 2 O 7 under LED irradiation. Among them, Bi 2 MoO 6 /Bi 2 Sn 2 O 7 had the best photocatalytic activity, and the photodegradation efficiency of RhB and TC reached 95.28 % and 87.45 %, respectively. After five cycles of degradation of RHB and TC solutions, the composite still maintained good photocatalytic activity. Through the free radical trapping experiment, it was concluded that O 2 À and h + were the main active substances for the degradation of organic compounds by composite photocatalyst. Through the plant toxicity test, it was proved that the composite didn't affect the normal growth of the plant. Therefore, this study provides a new material for the treatment of organic wastewater in production and life, which has important environmental protection significance.

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SDS capped and PVA capped ZnO nanostructures with high photocatalytic performance toward photodegradation of reactive red (RR141) azo dye

Cited by 93 publications

References 62 publications

Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

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

Preparation of a Bi₂MoO₆/Bi₂Sn₂O₇ Composite Photocatalyst and Its Photocatalytic Performance and Toxicity Test

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SDS capped and PVA capped ZnO nanostructures with high photocatalytic performance toward photodegradation of reactive red (RR141) azo dye

Cited by 93 publications

References 62 publications

Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

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

Preparation of a Bi2MoO6/Bi2Sn2O7 Composite Photocatalyst and Its Photocatalytic Performance and Toxicity Test

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Preparation of a Bi₂MoO₆/Bi₂Sn₂O₇ Composite Photocatalyst and Its Photocatalytic Performance and Toxicity Test