Enhanced photocatalytic hydrogen generation over ZrO2–TiO2–CdS hybrid structure

Sasikala, R.; Shirole, A.R.; Bharadwaj, S.R.

doi:10.1016/j.jcis.2013.07.047

Cited by 37 publications

(11 citation statements)

References 25 publications

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“…Pristine and surfactant mediated TiO 2 samples show broad emission peaks centered around 430 nm originating from defect levels of these samples [41]. In our case this emission peak is observed around 450 nm.…”

Section: Photoluminescence (Pl)supporting

confidence: 44%

Photoelectrochemical solar cell based on surfactant mediated rutile TiO2 nanorods

Pawar

Patil

Pawar

et al. 2015

J Mater Sci: Mater Electron

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Rutile titanium dioxide nanorods have been synthesized by a simple and cost-effective hydrothermal deposition method onto the conducting glass substrates. In order to study the effect of surfactants on the growth of TiO 2 , different surfactants like ethylenediaminetetraacetic acid, polyvinylpyrrolidone, cetyltrimethylammonium bromide and sodium dodecyl sulphate (SDS) are used. These films are characterized for their morphological, structural, compositional, optical and electrochemical properties using field emission scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, photoluminescence and electrochemical impedance spectroscopy techniques. FE-SEM images showed the formation of densely packed nanorods for SDS mediated TiO 2 . XRD patterns show the formation of polycrystalline TiO 2 with the tetragonal crystal structure possessing rutile phase. The chemical composition and valence states of the constituent elements were analysed by XPS. The films were photoelectrochemically active with the maximum current density of 378 lA/cm 2 with enhanced photovoltage of 615 mV for the sample prepared with SDS surfactant.

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Section: Photoluminescence (Pl)supporting

confidence: 44%

Photoelectrochemical solar cell based on surfactant mediated rutile TiO2 nanorods

Pawar

Patil

Pawar

et al. 2015

J Mater Sci: Mater Electron

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“…Details of the reactor and irradiation chamber are given in the Supplementary data (S1) and in our earlier publications [14,15]. The source of light used for the experiment was day-light fluorescent lamps.…”

Section: Photocatalytic Activity Studymentioning

confidence: 99%

Nanohybrid MoS2-PANI-CdS photocatalyst for hydrogen evolution from water

Sasikala

Gaikwad

Jayakumar

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…This is in conformity with the studies reported earlier by us as well as by many other authors. 5,11,[20][21][22]38,39 When Pd is used as a co-catalyst, interfacial transfer of electrons occurs from the photocatalyst to Pd. Through this process, the charges are separated efficiently and recombination is reduced.…”

Section: Photocatalytic Activity and The Possible Electron Transfer Pmentioning

confidence: 99%

“…Details of the irradiation chamber (S1) are given in the ESI † and in our earlier articles. 21,22 3. Results and discussion…”

Section: Photocatalytic Activity Studiesmentioning

confidence: 99%

The dual role of palladium in enhancing the photocatalytic activity of CdS dispersed on NaY-zeolite

Sasikala

Gaikwad

Sudarsan³

et al. 2015

Phys. Chem. Chem. Phys.

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A stable photocatalyst, CdS dispersed on zeolite with Pd as both the dopant and the co-catalyst, has been developed. Enhancement of photocatalytic activity for hydrogen generation is observed for CdS when doped with palladium and dispersed on NaY-zeolite (CdPdS-Z). A further increase in the photocatalytic activity of CdPdS-Z is observed when palladium is added as a co-catalyst (Pd-CdPdS-Z). Cd0.95Pd0.05S-Z is synthesized via a facile soft chemical route and the Pd co-catalyst is loaded onto the composite using a wet impregnation method. This composite catalyst exists as two phases consisting of CdPdS and zeolite and CdPdS exists as a highly dispersed phase on zeolite as revealed by TEM studies. The Pd doped CdS-zeolite composite exhibits increased visible light absorption indicating the alteration of the band structure of CdS as a result of doping. Time resolved fluorescence studies reveal that the lifetime of the charge carriers is higher in the composites than in pure CdS. A detailed characterization using XRD, Raman and X-ray photoelectron spectroscopy indicates that Pd has substituted for Cd in the CdS lattice and Pd exists in the Pd(2+) oxidation state. Solid state MAS NMR studies indicate that an interaction exists between CdS (or CdPdS) and zeolite at the interface and Cd selectively interacts with Al of the zeolite framework. The photocatalytic activity of the Pd-CdPdS-Z catalyst remains unchanged with repeated cycles. Characterization of the used catalyst indicates that it is stable under the present experimental conditions. The enhanced photocatalytic activity of Pd-CdPdS-Z is attributed to the enhanced visible light absorption arising due to Pd doping and increased lifetime of the photogenerated charge carriers assisted by zeolite and the Pd co-catalyst. This study highlights the multiple roles played by palladium in enhancing the photocatalytic activity of the CdS-zeolite composite.

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Enhanced photocatalytic hydrogen generation over ZrO2–TiO2–CdS hybrid structure

Cited by 37 publications

References 25 publications

Photoelectrochemical solar cell based on surfactant mediated rutile TiO2 nanorods

Photoelectrochemical solar cell based on surfactant mediated rutile TiO2 nanorods

Nanohybrid MoS2-PANI-CdS photocatalyst for hydrogen evolution from water

The dual role of palladium in enhancing the photocatalytic activity of CdS dispersed on NaY-zeolite

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