Preparing ZnS nanoparticles on the surface of carboxylic poly(vinyl alcohol) nanofibers

Zhou, Zhengfa; He, Dong; Xu, Weibing; Ren, Fengmei; Qian, Yitai

doi:10.1016/j.matlet.2007.02.041

Cited by 17 publications

(12 citation statements)

References 19 publications

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“…Without the PVP surfactant in the reaction system, only large agglomerates exhibiting neither regular morphology nor good dispersion were obtained (Figure S8 of the Supporting Information). Metal cations have strong coordinative interaction with organic molecules such as PVP, poly(vinyl alcohol), and compounds containing acyclic nitrogen atoms . Hence, it is reasonable to presume that Cd 2+ could coordinate with PVP by means of some functional sites after mixing cadmium source and PVP.…”

Section: Resultsmentioning

confidence: 99%

“…Metal cations have strongc oordinativei nteraction with organic molecules such as PVP,p oly(vinyl alcohol), and compounds containing acyclic nitrogen atoms. [46][47][48] Hence, it is reasonable to presumet hat Cd 2 + could coordinate with PVP by means of some functional sites after mixing cadmium source and PVP. On introducing thiourea (TU) as sulfur source, the chemical reactiont of orm CdS starts when sulfur ions are released from TU.…”

Section: Growth Mechanism Of Various Structuresmentioning

confidence: 88%

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One‐Pot Synthesis of Size‐Controllable Core–Shell CdS and Derived CdS@Zn_xCd_1−xS Structures for Photocatalytic Hydrogen Production

Kai

Wang

2017

Chemistry A European J

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Chalcogenide micro/nanocomposite structures have been attracting worldwide attention due to prospective applications in photocatalytic hydrogen production. Well-defined micro/nanostructures with pronounced properties are of extraordinary importance. Herein, a facile one-pot method for the synthesis of monodisperse, size-controllable CdS core-shell and CdS@Zn Cd S core-double shell submicrospheres, which were engineered with respect to structure and size, is reported. CdS core-shell submicrospheres with different sizes were selectively prepared for the first time. The growth mechanism was investigated in detail by monitoring the time-dependent morphology of intermediates by TEM. By introduction of a zinc precursor in the synthetic system, CdS@Zn Cd S core-double shell submicrospheres were obtained by cation exchange of CdS with zinc ions, with a process of diffusion of CdS towards the outside and transformation of Zn Cd S crystallites. The H evolution rate over CdS@Cd Zn S (5.17 mmol h g ) is 12.3 times that of CdS core-shell structures (0.42 mmol h g ) under visible light, owing to the efficient charge separation, as demonstrated by electrochemical impedance and transient-state time-resolved photoluminescence spectroscopy. Furthermore, CdS@Zn Cd S core-double shell structures exhibited excellent stability over 20 h of hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Section: Growth Mechanism Of Various Structuresmentioning

confidence: 88%

One‐Pot Synthesis of Size‐Controllable Core–Shell CdS and Derived CdS@Zn_xCd_1−xS Structures for Photocatalytic Hydrogen Production

Kai

Wang

2017

Chemistry A European J

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“…As soon as S 2− ions become available, reaction between Zn 2+ and S 2− ions takes place to form ZnS nuclei. ZnS nuclei formed grow into nanoparticles under the combining force between Zn 2+ ions and S 2− ions within the cavities bound by the polymer chains [40]. NaCMC being anionic long chain polymer, provides electrostatic as well as steric stabilization.…”

Section: Fourier-transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

Spectroscopic investigation of green synthesized ZnS nanoparticles encapsulated by sodium carboxy methyl cellulose

Devi

Rao

Ramananda³

2020

Appl. Phys. A

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In this article, the capping action of Sodium carboxymethyl cellulose (NaCMC) on ZnS nanoparticles synthesized by microwave-assisted method is reported. The X-ray diffraction and electron diffraction studies corroborated nanocrystalline nature of cubic ZnS. Discontinuous cluster growth of particles was implied by optical absorption studies. This was reflected in transmission electron microscope images. Fourier-transform infrared studies confirmed NaCMC capping on the surface of ZnS nanoparticles. Effective encapsulation of ZnS nanoparticles by NaCMC was further supported by Raman scattering, thermal studies and photoluminescence studies. Surface modification of ZnS nanoparticles with NaCMC appear to be suitable for specific biomedical applications due to the nontoxicity of ZnS and NaCMC.

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“…ZnS is an important II-VI semiconductor and can be applied in cathode-ray tubes (CRTs), 21) luminescence materials, 22) infrared windows, 23) and photocatalysis. [24][25][26] In recent years, ZnS nanocrystals (NCs) have been extensively studied due to their unique properties and are reported to have potential as photocatalysts in environmental contaminant elimination, CO 2 reduction, and H 2 evolution.…”

Section: -20)mentioning

confidence: 99%

Photocatalytic Performance of ZnS and TiO₂Supported on AC Under Visible Light Irradiation

Meng¹,

Cho²,

Ghosh³

et al. 2012

Korean Journal of Materials Research

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AC and ZnS modified TiO 2 composites (AC/ZnS/TiO 2 ) were prepared using a sol-gel method. The composite obtained was characterized by Brunauer-Emmett-Teller (BET) surface area measurements, X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, scanning electron microscope (SEM) analysis, and according to the UV-vis absorption spectra (UV-vis). XRD patterns of the composites showed that the AC/ZnS/TiO 2 composites contain a typical single and clear anatase phase. The surface properties as observed by SEM present the characterization of the texture of the AC/ZnS/TiO 2 composites, showing a homogenous composition in the particles showing the micro-surface structures and morphology of the composites. The EDX spectra of the elemental identification showed the presence of C and Ti with Zn and S peaks for the AC/ZnS/TiO 2 composite. UV-vis patterns of the composites showed that these composites had greater photocatalytic activity under visible light irradiation. A rhodamine B (Rh.B) solution under visible light irradiation was used to determine the photocatalytic activity. The degradation of Rh.B was determined using UV/Vis spectrophotometry. An increase in the photocatalytic activity was observed. From the photocatalytic results, the excellent activity of the Y-fullerene/TiO 2 composites for the degradation of methylene blue under visible irradiation could be attributed to an increase in the photo-absorption effect caused by the ZnS and to the cooperative effect of the AC.

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Preparing ZnS nanoparticles on the surface of carboxylic poly(vinyl alcohol) nanofibers

Cited by 17 publications

References 19 publications

One‐Pot Synthesis of Size‐Controllable Core–Shell CdS and Derived CdS@Zn_xCd_1−xS Structures for Photocatalytic Hydrogen Production

One‐Pot Synthesis of Size‐Controllable Core–Shell CdS and Derived CdS@Zn_xCd_1−xS Structures for Photocatalytic Hydrogen Production

Spectroscopic investigation of green synthesized ZnS nanoparticles encapsulated by sodium carboxy methyl cellulose

Photocatalytic Performance of ZnS and TiO₂Supported on AC Under Visible Light Irradiation

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Preparing ZnS nanoparticles on the surface of carboxylic poly(vinyl alcohol) nanofibers

Cited by 17 publications

References 19 publications

One‐Pot Synthesis of Size‐Controllable Core–Shell CdS and Derived CdS@ZnxCd1−xS Structures for Photocatalytic Hydrogen Production

One‐Pot Synthesis of Size‐Controllable Core–Shell CdS and Derived CdS@ZnxCd1−xS Structures for Photocatalytic Hydrogen Production

Spectroscopic investigation of green synthesized ZnS nanoparticles encapsulated by sodium carboxy methyl cellulose

Photocatalytic Performance of ZnS and TiO2Supported on AC Under Visible Light Irradiation

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One‐Pot Synthesis of Size‐Controllable Core–Shell CdS and Derived CdS@Zn_xCd_1−xS Structures for Photocatalytic Hydrogen Production

One‐Pot Synthesis of Size‐Controllable Core–Shell CdS and Derived CdS@Zn_xCd_1−xS Structures for Photocatalytic Hydrogen Production

Photocatalytic Performance of ZnS and TiO₂Supported on AC Under Visible Light Irradiation