Visible Light-Induced Degradation of Methylene Blue in the Presence of Photocatalytic ZnS and CdS Nanoparticles

Soltani, Nayereh; Saion, Elias; Hussein, Mohd Zobir; Erfani, Maryam; Abedini, Alam; Bahmanrokh, Ghazaleh; Navasery, Manizheh; Vaziri, Parisa

doi:10.3390/ijms131012242

Cited by 385 publications

(157 citation statements)

References 40 publications

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“…These electron-hole pairs act as powerful oxidizing and reducing agents [35]. The photo-generated electrons and holes can transfer to the surface of crystal, when particle size is small enough [34].…”

Section: Mechanism Of Photocatalytic Activitymentioning

confidence: 99%

ZnO nanoflowers: Novel biogenic synthesis and enhanced photocatalytic activity

Tripathi

Bhadwal

Gupta

et al. 2014

Journal of Photochemistry and Photobiology B: Biology

171

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Section: Mechanism Of Photocatalytic Activitymentioning

confidence: 99%

ZnO nanoflowers: Novel biogenic synthesis and enhanced photocatalytic activity

Tripathi

Bhadwal

Gupta

et al. 2014

Journal of Photochemistry and Photobiology B: Biology

171

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“…Therefore, we could determine the ΔG as the difference between the LUMO of the CuInSe 2 NCs and the oxygen reduction potential (E red 0 , -0.046 vs. NHE). 92 We calculated the ΔG from Eq. 3 utilizing the LUMO position for PEG 6 -thiolate-coated different sizes CuInSe 2 NCs as shown in Figure 5B.…”

Section: Size Dependent Electrochemical Properties Of Fully Diffused mentioning

confidence: 99%

Investigating the Control by Quantum Confinement and Surface Ligand Coating of Photocatalytic Efficiency in Chalcopyrite Copper Indium Diselenide Nanocrystals

et al. 2016

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ABSTRACT:In the past few years, there has been an immense interest in the preparation of sustainable photocatalysts composed of semiconductor nanocrystals (NCs) as one of their component. We report here, for the first time, the effects of structural parameters of copper indium diselenide (CuInSe 2 ) NCs on visible light driven photocatalytic degradation of pollutants under homogeneous conditions. Ligand exchange reactions were performed replacing insulating, oleylamine capping with poly(ethylene glycol) thiols to prepare PEG-thiolate-capped, 1.8 to 5.3 nm diameter CuInSe 2 NCs to enhance their solubility in water. This unique solubility property caused inner-sphere electron transfer reactions (O 2 to O 2 −) to occur at the NCs surface allowing for sustainable photocatalytic reactions. Electrochemical characterization of our dissolved CuInSe 2 NCs showed that the thermodynamic driving force (-ΔG) for oxygen reduction, which increased with decreased NCs size, was the dominant contributor to the overall process when compared to the contribution light absorption and the coulombic interaction energies of electronhole pair (J e/h ). A two-fold increase in phenol degradation efficiency (from 30 to ~60%) was achieved by controlled variation of the diameter of CuInSe 2 NCs from 5.3 to 1.8 nm. The surface ligand dependency of photocatalytic efficiency was also investigated and a profound effect on phenol degradation was observed. Our PEG-thiolate-capped CuInSe 2 NCs showed photocatalytic activity towards other organic compounds, such as N, N-dimethyl-4-phenylenediamine, methylene blue, and thiourea, which showed decomposition under visible light.3

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“…In order to eliminate the potential danger of these organic dyes, many technologies have been developed to treat these pollutants. Photocatalysis is an alternative route for water purification [2]. Photocatalysis is a process by which a semiconductor material absorbs light of energy greater than or equal to its band gap.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Metal-Doped (Ni, Co, Ce, Sb) CdS Catalysts and Their Use in Methylene Blue Degradation under Visible Light Irradiation

Ertis¹,

Boz²

2017

MRC

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Metal doped CdS nanoparticles were synthesized by a simple chemical precipitation route with different metals. The obtained nanoparticles were characterized by XRD and UV-vis reflectance spectroscopy. The results indicated that metal-doped CdS catalysts were successfully obtained with cubic structure and 4.0 -4.5 nm crystallite size. The band gap energies of metal-doped CdS catalysts were estimated using UV-visible reflectance spectra to be about the range of 2.25 -2.55 eV. Methylene blue was degraded by using metal doped CdS nanoparticles under a 400 W medium-pressure mercury lamp of visible light irradiation (λ > 420 nm). Higher degradation efficiency was achieved by adding metals to the photocatalyst compared with the single CdS catalyst. In this case, the degradation efficiency of Co-CdS catalyst after 4h irradiation time was about 87%.

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Visible Light-Induced Degradation of Methylene Blue in the Presence of Photocatalytic ZnS and CdS Nanoparticles

Cited by 385 publications

References 40 publications

ZnO nanoflowers: Novel biogenic synthesis and enhanced photocatalytic activity

ZnO nanoflowers: Novel biogenic synthesis and enhanced photocatalytic activity

Investigating the Control by Quantum Confinement and Surface Ligand Coating of Photocatalytic Efficiency in Chalcopyrite Copper Indium Diselenide Nanocrystals

Synthesis and Characterization of Metal-Doped (Ni, Co, Ce, Sb) CdS Catalysts and Their Use in Methylene Blue Degradation under Visible Light Irradiation

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