Effect of reaction parameters on photoluminescence and photocatalytic activity of zinc sulfide nanosphere synthesized by hydrothermal route

Chanu, T. Inakhunbi; Samanta, Dhrubajyoti; Tiwari, Archana; Chatterjee, Somenath

doi:10.1016/j.apsusc.2016.05.045

Cited by 40 publications

(10 citation statements)

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“…In this formula, L is the coherence length, λ is the wavelength of the X-ray radiation used (0.15406 nm), B is the full width at half maximum (FWHM) of the most intense peak, and θ is the angle of diffraction. The relationship between the coherence length L and the diameter of a spherical NP (D) is known to be D = 4L/3 [4,9]. The calculated crystallite diameters for samples ZnS(1) and ZnS(2) were 2.8 and 3.2 nm, respectively.…”

Section: Fe-sem Images Of Sample Znsmentioning

confidence: 99%

“…Zinc sulfide, as a type II-VI semiconductor, is among the widely investigated materials, and many methods have been proposed for the preparation of its nanostructures with tailored characteristics. For example, the hydrothermal method is commonly used for synthesis of nanosized ZnS from starting reagents such as sodium sulfide, hydrogen sulfide, thiourea, and sulfur powder [1][2][3][4][5][6]. The NP size and composition can be controlled by changing the pH and/or adding a stabilizing agent [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Room-Temperature Synthesis of ZnS Nanoparticles Using Zinc Xanthates as Molecular Precursors

et al. 2020

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Molecular precursors are suitable starting compounds for preparation of semiconductor nanoparticles (NPs), which allow for control of atomic ratio, composition, monodispersity, and particle size of nanoscaled metal sulfides/oxides. In the present study, we carried out a one-pot synthesis of ZnS NPs in aqueous triethanolamine medium at room temperature, from molecular precursor zinc xanthate as a source of both Zn2+ and S2− ions. Furthermore, we compared the products obtained from zinc ethylxanthate (Zn(C2H5OCS2)2) and zinc amylxanthate (Zn(C5H11OCS2)2). The as-prepared ZnS NPs were found to crystallize in cubic phase, which usually forms at low temperatures, with the dimension dependent on the xanthate precursor used. The long carbon-chain xanthate Zn(C5H11OCS2)2 gave spherically shaped NPs with an average diameter of 19 nm, while the NPs that originated from zinc ethylxanthate had a mean size of ~26 nm. Both nanomaterials had surface sulfur vacancies that extended their absorption spectra toward the visible region and reduced the band gap. This allowed both materials to demonstrate photocatalytic performance under visible-light irradiation. Photodegradation of methylene blue over newly prepared ZnS NPs was tested under visible light, demonstrating efficiency of 50%–60% after 180 min.

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Section: Fe-sem Images Of Sample Znsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Room-Temperature Synthesis of ZnS Nanoparticles Using Zinc Xanthates as Molecular Precursors

et al. 2020

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“…Further, the broadening of XRD peaks represent smaller crystallite size, therefore, formation of smaller crystallites in Z-02 compared to Z-01 may be expected. Using the Debye Scherer equation [6], average crystallite sizes of 21 nm and 11 nm for Z-01 and Z-02, respectively, were calculated. This confirms the presence of smaller crystallites in Z-02.…”

Section: Structural Optical and Microstructural Characterizationsmentioning

confidence: 99%

“…An alternative to these techniques is photocatalysis [4] using semiconductor nanomaterials (SNMs), which efficiently degrades organic wastes, such as dyes, drugs, etc. from aqueous media [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…The rapid formation and stability of reactive oxidative species (ROS) in ZnO NPs makes it a highly promising photocatalyst. It has been well established that when the photon energy is higher than the bandgap energy of the photocatalyst, energy absorption takes place which subsequently results into the transfer of electrons from the valence band (VB) of the photocatalyst towards its conduction band (CB), while generating holes in the former [6,8]. Provided there is less radiative recombination of the as-formed electrons and holes, ROS may be generated in the reaction medium.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of synthesis approaches for tuning the photocatalytic property of ZnO nanoparticles

Basnet

Samanta

Chanu³

et al. 2019

SN Appl. Sci.

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Tuning the photocatalytic property of zinc oxide (ZnO) nanoparticles (NPs) is timely. Dependence of photocatalysis upon size, morphology and effective surface area of the particles used has led to optimization in various synthesis procedures. The current article addresses to dictate a cost-effective, bio-friendly, modified ease-process for this issue. The synthesis of ZnO NPs with differing photophysical properties, sizes and morphologies, in order to tune its photocatalytic activity, have been extensively studied. Polyethylene glycol as the structure directing agent and different synthesis strategies were adopted. Spectroscopic and microscopic characterization techniques were employed to understand the nature of the as-synthesized samples. Photocatalytic property and photostability of the samples were determined based on experiments performed with common xanthene and azo dyes. Based on analysing the results, certain characteristics, such as smaller particle size, less agglomerated structure, higher surface area and superior lifetime of the photogenerated electrons and holes upon light illumination, were essential for ZnO NPs to act as an efficient photocatalyst.

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Nanocomposites of ZnO for Water Remediation

Basnet

Chatterjee

2019

Composites for Environmental Engineering

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Effect of reaction parameters on photoluminescence and photocatalytic activity of zinc sulfide nanosphere synthesized by hydrothermal route

Cited by 40 publications

References 58 publications

Room-Temperature Synthesis of ZnS Nanoparticles Using Zinc Xanthates as Molecular Precursors

Room-Temperature Synthesis of ZnS Nanoparticles Using Zinc Xanthates as Molecular Precursors

Assessment of synthesis approaches for tuning the photocatalytic property of ZnO nanoparticles

Nanocomposites of ZnO for Water Remediation

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