Alcohothermal synthesis of flower-like ZnS nano-microstructures with high visible light photocatalytic activity

Bai, Weibin; Liu, Cai; Wu, Chunxiang; Xiao, Xu; Fan, Xuelin; Chen, Kuizhi; Lin, Juqiang

doi:10.1016/j.matlet.2014.03.073

Cited by 20 publications

(5 citation statements)

References 22 publications

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“…The ZnS nanoparticles were prepared following the previously published procedure (Bai et al, 2014). In a typical synthesis procedure, 0.38 g of thioacetamide was added to a solution of 1.5 g of zinc nitrate hexahydrate (Zn(NO 3 ) 2 •6H 2 O) in 37.5 mL ethanol and the mixed solution was stirred at room temperature for 30 min.…”

Section: Synthesis and Characterization Of Zns Nanoparticlesmentioning

confidence: 99%

Application of nanoscale ZnS/TiO 2 composite for optimized photocatalytic decolorization of a textile dye

Talebi¹,

Chaibakhsh²,

Moradi‐Shoeili³

2017

Journal of Applied Research and Technology

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The synthesis of ZnS/TiO 2 nanocomposite was successfully performed by a chemical deposition method. The structure and morphology of the prepared catalyst were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and FT-IR spectroscopy. The activity of the photocatalyst was evaluated for the removal of Acid Blue 113 (AB113) dye in aqueous solution under UV-A radiation. Response surface methodology (RSM) based on the central composite rotatable design (CCRD) was applied to study and optimize the photodegradation process. The effects of three experimental parameters including pH, irradiation time, and the catalyst dose on the AB113 removal were studied. A high dye removal (99.0%) was obtained by using minimum amount of the catalyst (37 mg) at the optimal conditions of 27.32 min and pH 6.18. Compared with pure nano-sized TiO 2 and ZnS, the synthesized nanocomposite exhibited a higher photocatalytic activity. The kinetics of AB113 adsorption on the surface of ZnS/TiO 2 nanocomposite could be described by the pseudo second order and parabolic-diffusion models.

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Section: Synthesis and Characterization Of Zns Nanoparticlesmentioning

confidence: 99%

Application of nanoscale ZnS/TiO 2 composite for optimized photocatalytic decolorization of a textile dye

Talebi¹,

Chaibakhsh²,

Moradi‐Shoeili³

2017

Journal of Applied Research and Technology

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“…In some cases the photocorrosion can be considerably suppressed in the presence of sacrificial reagents (Kudo and Miseki 2009). Anyway CdS has been used in laboratory trials for the treatment of dyes and organic pollutants in aqueous media (Giribabu et al 2012;Yu et al 2011) Among other metal sulfides such as ZnS, Sb 2 S 3 , Bi 2 S 3 , and MoS, only zinc sulfide possesses a wide band gap of 3.5 eV; even so this material has the advantage to be nontoxic, exhibiting good photocatalytic activity on removal of hazardous compounds (Bai et al 2014).…”

Section: Chalcogenides: Other Than Oxidesmentioning

confidence: 99%

Semiconducting Materials

Hernández-Ramírez¹,

Medina-Ramírez²

2014

Photocatalytic Semiconductors

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Semiconducting materials are of great technological importance in electronics industry and environmental remediation due to their ability to generate charge carriers when activated with certain energy. The favorable combination of electronic structure, light absorption properties, charge transport characteristics, and excited lifetimes of some semiconductors has made possible its application as photocatalyst. Although many publications define the fundamental aspects of the semiconductors from different points of view, in this chapter the definition of photocatalytic semiconductor, its structural characteristics, and the requirements to be used as photocatalyst are briefly recalled. In addition, the classification of photocatalytic materials and the mechanism of the photocatalytic process are also reviewed. The advantages and disadvantages of the most used photocatalyst TiO 2 and the second-generation TiO 2 -based materials are also addressed.

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“…Zinc sulphide is polymorphous with a cubic zinc blende (sphalerite) structure that is more stable at low temperature and a hexagonal wurtzite structure which commonly forms at high temperatures. It has one of the richest and most diverse morphologies, exhibiting different properties that allow its use in various applications, including nanowires ( Cao et al, 2014 ), nanorods ( Palanisamy et al, 2020 ), nanoflowers ( Bai et al, 2014 ), nanospheres ( Feng et al, 2020 ), nanotubes ( Wang et al, 2017 ), nanobelts ( Ham and Jang, 2018 ), and nanosheets ( Fang et al, 2011 ). For example, nanorods, nanoarrays, and nanoflowers exhibit light-trapping effects that enhance light absorption which in turn results in increased photocatalytic activity ( Bhushan and Jha, 2020 ; Ren et al, 2021 ; Aulakh et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Rhodamine B Dye and Hydrogen Evolution by Hydrothermally Synthesized NaBH4—Spiked ZnS Nanostructures

et al. 2022

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Metal sulphides, including zinc sulphide (ZnS), are semiconductor photocatalysts that have been investigated for the photocatalytic degradation of organic pollutants as well as their activity during the hydrogen evolution reaction and water splitting. However, devising ZnS photocatalysts with a high overall quantum efficiency has been a challenge due to the rapid recombination rates of charge carriers. Various strategies, including the control of size and morphology of ZnS nanoparticles, have been proposed to overcome these drawbacks. In this work, ZnS samples with different morphologies were prepared from zinc and sulphur powders via a facile hydrothermal method by varying the amount of sodium borohydride used as a reducing agent. The structural properties of the ZnS nanoparticles were analysed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) techniques. All-electron hybrid density functional theory calculations were employed to elucidate the effect of sulphur and zinc vacancies occurring in the bulk as well as (220) surface on the overall electronic properties and absorption of ZnS. Considerable differences in the defect level positions were observed between the bulk and surface of ZnS while the adsorption of NaBH4 was found to be highly favourable but without any significant effect on the band gap of ZnS. The photocatalytic activity of ZnS was evaluated for the degradation of rhodamine B dye under UV irradiation and hydrogen generation from water. The ZnS nanoparticles photo-catalytically degraded Rhodamine B dye effectively, with the sample containing 0.01 mol NaBH4 being the most efficient. The samples also showed activity for hydrogen evolution, but with less H2 produced compared to when untreated samples of ZnS were used. These findings suggest that ZnS nanoparticles are effective photocatalysts for the degradation of rhodamine B dyes as well as the hydrogen evolution, but rapid recombination of charge carriers remains a factor that needs future optimization.

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Alcohothermal synthesis of flower-like ZnS nano-microstructures with high visible light photocatalytic activity

Cited by 20 publications

References 22 publications

Application of nanoscale ZnS/TiO 2 composite for optimized photocatalytic decolorization of a textile dye

Application of nanoscale ZnS/TiO 2 composite for optimized photocatalytic decolorization of a textile dye

Semiconducting Materials

Photocatalytic Degradation of Rhodamine B Dye and Hydrogen Evolution by Hydrothermally Synthesized NaBH4—Spiked ZnS Nanostructures

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