Alternate synthetic strategy for the preparation of CdS nanoparticles and its exploitation for water splitting

Sathish, M.; Viswanathan, B.; Viswanath, R. P.

doi:10.1016/j.ijhydene.2005.08.002

Cited by 276 publications

(137 citation statements)

References 23 publications

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“…The extent of this energy level shift is found to be dependent of the particle size of the noble metal. In a recent study on visible light induced photocatalytic splitting of water over platinum group metals dispersed on CdS nanocrystallites, Satish et al [28] proposed that the rate of hydrogen production can be related to the metal-hydrogen bonding, and the electron work function and redox potential of the noble metal atom. These authors suggested that the better performance of Pt as a co-catalyst compared to other platinum group elements such as Pd, Rh and Ru can be ascribed to its higher work function, lower metal-hydrogen bond energy, and more positive redox potential.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

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Structure Sensitivity of Nano-structured CdS/SBA-15 Containing Au and Pt Co-catalysts for the Photocatalytic Splitting of Water

2007

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Photocatalysts containing nanocrystallites of cadmium sulphide dispersed in the channels of mesoporous silicate SBA-15 exhibited enhanced activity for visiblelight mediated splitting of water, as compared to bulk CdS. Whereas the incorporation of 1 wt.% Pt co-catalyst in CdS/ SBA-15 led to a substantial increase in H 2 yield, Au at similar loading resulted in marginally decreased activity.The results indicate that the photocatalytic activity of CdS crystallites is structure sensitive. Similarly, the role of a noble metal may be associated with the particle size dependent micro-structural features, rather than its electronic properties such as the work function or the heat of adsorption of reactant or product molecules.Keywords Nano-structured cadmium sulphide Á Photocatalysis Á Structure sensitivity Á Splitting of water Á Role of noble metal co-catalyst

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Section: Photocatalytic Activitymentioning

confidence: 99%

“…It was argued that when the metalhydrogen bond energy is less, the hydrogen evolution barrier is substantially reduced, resulting in easy evolution of molecular hydrogen. Similarly, more positive is the redox potential of the noble metal the faster will be the reduction of H + ions generated during H 2 O-h + interaction [28].…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Structure Sensitivity of Nano-structured CdS/SBA-15 Containing Au and Pt Co-catalysts for the Photocatalytic Splitting of Water

2007

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“…9 The coverage of ZnO nanobars by a window layer of CdS can be obtained. 14,20 , which increases the photocatalyst price. Out of these metals, palladium has the lowest price.…”

Section: −mentioning

confidence: 99%

Synthesis of PdS/ZnS--CdS-type photocatalysts using ZnS as sulphide source

Banica¹,

Linul²,

Mosoarca³

2017

Turk J Chem

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In this work, a new method for the growth of large CdS crystals into PdS/ZnS-CdS-type photocatalysts is presented. In order to accomplish this, in the first stage zinc sulphide was synthesised and hydrothermally crystallised.In the second stage, after PdS decoration, the recrystallised zinc sulphide was utilised as sulphur source for the synthesis of PdS/ZnS-CdS-type photocatalysts. The photocatalysts were characterised by X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy, and diffuse reflectance spectroscopy. In the third stage magnetic polymer supports were manufactured and loaded with photocatalyst. Finally photocatalysis experiments under blue light illumination were conducted for the hydrogen evolution reaction in the presence of sulphite and sulphide ions on both suspension and polymer supported photocatalysts. The photocatalysts' efficiency increased by about 70% along with the PdS quantity increase from 0.11% to 0.89%. The use of magnetic polymer may be a solution for reducing the costs necessary to maintain the photocatalysts in suspension.

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“…Due to the well-defined pore size, high surface area associated with the open framework, microporous solids loaded with nanoscale particles within their pores have received considerable attention in recent years, especially in preparing semiconductor nanoparticles. However, most of microporous materials used as host need a modification procedure to functionalize the micropore internal surface [8,9].…”

Section: Introductionmentioning

confidence: 99%

Incorporation of CoS nanoparticles into ZSM-5 zeolite by hydrothermal and ion exchange methods

Sohrabnezhad

Pourahmad

Zanjanchi

2009

JICS

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Cobalt sulfide nanoparticles were introduced into the medium-pore zeolite ZSM-5 (Zeolite Scony Mobil Five) by ion exchange in aqueous suspension and also by the addition of cobalt sulfate to the synthesis gel in hydrothermal zeolite synthesis. The latter method was systematically studied in the presence of tetraethylammonium ions as organic agents. The materials were characterized by chemical analysis, x-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), energy dispersion x-ray (EDX), IR, BET and diffuse reflectance spectroscopy (DRS). SEM picture and BET were used to discriminate between CoS nanoparticles in the zeolite pores and on the outer crystal surface. Their crystalline structure and morphology were studied by XRD and scanning electron microscopy. The results showed that in hydrothermal method zeolite acts as a template. CoS nanoparticles with an approximate size of 22 nm grow on the surface of zeolite. In ion exchange method, however, the majority of CoS nanoparticles are about 6 nm in diameter, located on the surface of the MFI (type materials ZSM-5) structure. Exciton absorption peaks at higher energy than the fundamental absorption edge of bulk CoS indicate quantum confinement effect in nanoparticles as a consequence of their small size. The absorption spectra show that the optical band gap for CoS nanoparticles produced by hydrothermal and ion exchange methods is 3.68 and 4.1 eV, respectively.

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Alternate synthetic strategy for the preparation of CdS nanoparticles and its exploitation for water splitting

Cited by 276 publications

References 23 publications

Structure Sensitivity of Nano-structured CdS/SBA-15 Containing Au and Pt Co-catalysts for the Photocatalytic Splitting of Water

Structure Sensitivity of Nano-structured CdS/SBA-15 Containing Au and Pt Co-catalysts for the Photocatalytic Splitting of Water

Synthesis of PdS/ZnS--CdS-type photocatalysts using ZnS as sulphide source

Incorporation of CoS nanoparticles into ZSM-5 zeolite by hydrothermal and ion exchange methods

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