Photocatalytic production of hydrogen from H2S solutions over CdS/Pt colloids

Muradov, Nazim; Rustamov, M. I.; Guseinova, A. D.; Bazhutin, Yu. V.

doi:10.1007/bf02128076

Cited by 13 publications

(8 citation statements)

References 5 publications

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“…Kako [8]. Pt/CdS colloidal particles were used for photocatalytic hydrogen production from H 2 S solution by Muradav et al [9]. Swarnkar et al observed the photocatalytic bleaching of gentian violet at CdS semiconductor surface [10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of CeFeO3 photocatalyst used in photocatalytic bleaching of gentian violet

Ameta

Kumar

Ameta³

et al. 2009

JICS

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Ternary oxides have been used as effective photocatalyst for carrying out number of chemical reactions. Method of preparation has major effect on the performance of these mixed oxide catalysts. In the present work, cerium iron oxide catalyst was synthesized using co-precipitation method and specific heating cycle. Synthesized catalyst was characterized using X-ray diffraction patterns. Photocatalytic degradation on gentian violet dye was observed using this catalyst and progress of the reaction was monitored spectrophotometrically. The effect of variation of different parameters like concentration of gentian violet, pH, amount of semiconductor and light intensity was also studied. A tentative mechanism for the photocatalytic bleaching of gentian violet has been proposed.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of CeFeO3 photocatalyst used in photocatalytic bleaching of gentian violet

Ameta

Kumar

Ameta³

et al. 2009

JICS

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“…A large number of metal oxides and sulfides (e.g. TiO 2 , 1-3 WO 3 , 4-6 SrTiO 3 , 7,8 ZnO, [9][10][11] CdS, [12][13][14][15][16][17] ZnS, 13,16,18,19 niobates, [20][21][22][23][24] and tantalates [25][26][27][28] ) have been examined as photocatalysts for hydrogen production from splitting water. However, the majority of the simple and mixed-metal oxides photocatalysts are primarily active for H 2 production under UV irradiation (l < 385 nm or E g $ 3.0 eV) present in only a small portion of solar light.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic production of hydrogen on Ni/NiO/KNbO3/CdS nanocomposites using visible light

et al. 2008

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3. Enhanced activity is most likely due to effective charge separation of photogenerated electrons and holes in CdS that is achieved by electron injection into the conduction band of KNbO 3 and the reduced states of niobium (e.g., Nb(IV) and Nb(III)) are shown to contribute to enhanced reactivity in the KNbO 3 composites by mediating effective electron transfer to bound protons. We also observed that the efficient attachment of Q-size CdS and the deposition of nickel on the KNbO 3 surface increases H 2 production rates. Other factors that influence the rate of H 2 production including the nature of the electron donors and the solution pH were also determined. The Ni/NiO/KNbO 3 /CdS nanocomposite system appears to be a promising candidate for possible practical applications including the production of H 2 under visible light.

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“…Another important aspect of the chemistry of the sacrificial donor such as S 2– is its ability to undergo protonation when the salt is dissolved in water. For example, Na 2 S (a commonly used sacrificial donor for metal chalcogenide systems) dissolved in water forms SH – and makes the solution basic with pH in the range of 12–13 (eq ): Oxidation of SH – in aqueous solution containing metal chalcogenide photocatalysts has also been shown to produce hydrogen. , Thus, in a photocatalytic reaction involving metal chalcogenides as a photocatalyst and a S 2– /SH – as sacrificial electron donor, both reductive and oxidative cycles can produce hydrogen. One should also take into consideration the pH of the solution (very low H + ion concentration in alkaline solution) and should not indicate reduction of H + ions as the possible reduction step in the overall reaction mechanism.…”

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confidence: 99%