Effect of the size-induced structural transformation on the band gap in CdS nanoparticles

Banerjee, Rajarshi; Jayakrishnan, R.; Ayyub, Pushan

doi:10.1088/0953-8984/12/50/325

Cited by 311 publications

(198 citation statements)

References 20 publications

(26 reference statements)

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“…The average crystal size of the samples lies in the order of 6.2 ± 2.1 nm. The lattice constant (a) was calculated to be 5.8 Å for these samples, which matches with the earlier reported lattice constant for cubic zinc blend structure of CdS NPs [34].…”

Section: X-ray Diffraction Analysissupporting

confidence: 88%

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One-pot sonochemical synthesis of CdS nanoparticles: photocatalytic and electrical properties

et al. 2015

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CdS nanoparticles (NPs) are synthesized by sonochemical method using tryptophan as a capping agent. The synthesis process is of one step, using biocompatible capping agent, which is nontoxic. The synthesized NPs are characterized by UV-Vis absorption, fluorescence, FTIR, XRD, TGA, DLS, SEM and TEM. The size of NPs is below 10 nm, as observed from XRD and TEM characterizations. Photocatalytic degradation of methyl orange (MO) dye by the CdS NPs as photocatalysts under sunlight irradiation has been studied. The kinetics of catalysis of synthesized CdS NPs with MO dye follows pseudo-firstorder kinetics with reasonable apparent rate constants. A variation of dielectric constant as a function of frequencies of an alternating electric field has been observed with the prepared tryptophan-capped CdS NPs deposited at different concentrations. The electric conductivity of CdS NPs is found to increases with the concentration of tryptophan.

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Section: X-ray Diffraction Analysissupporting

confidence: 88%

“…It was considered that the phase stability between the zinc blende and wurtzite structures of CdS was size dependent. Generally, the cubic CdS nanoparticles exist in smaller sizes and in the wurtzite structure appear larger due to the growth of the particles [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

One-pot sonochemical synthesis of CdS nanoparticles: photocatalytic and electrical properties

et al. 2015

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“…As a mean to achieve this goal, semiconductor photocatalysts have been extensively studied. In particular, a variety of visible light-active photocatalyts [2][3][4][5][6] including CdS [7][8][9][10][11][12][13] have been studied. In terms of the band gap magnitude and the position of band edges, CdS is ideally suited for photocatalytic water splitting but it is not effective at all unless suitable electron donors (EDs) are present.…”

Section: Introductionmentioning

confidence: 99%

Effects of the preparation method of the ternary CdS/TiO2/Pt hybrid photocatalysts on visible light-induced hydrogen production

2008

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A variety of combinations of CdS, TiO 2 , and Pt in preparing the hybrid catalysts were studied for hydrogen production under visible light (l > 420 nm) irradiation. The preparation method sensitively influenced the activity of the ternary hybrid catalysts. The formation of the potential gradient at the interface between CdS and TiO 2 is necessary in achieving the efficient charge separation and transfer and how the platinum as a cocatalyst is loaded onto the CdS/TiO 2 hybrid catalysts determines the overall hydrogen production efficiency. The common method of photoplatinization of CdS/TiO 2 hybrid [Pt-(CdS/TiO 2 )] was much less efficient than the present method in which Pt was photodeposited on bare TiO 2 , which was followed by the deposition of CdS [CdS/(Pt-TiO 2 )]. The CdS/(Pt-TiO 2 ) has the hydrogen production rate ranging (6-9) Â 10, which is higher by a factor of 3-30 than that of Pt-(CdS/TiO 2 ). The photocatalytic activity of the ternary hybrid catalysts was extremely sensitive to where the platinum is loaded. The photoactivity of the hybrid catalyst was also assessed in terms of the photocurrent collected by the methyl viologen electron shuttle in the catalyst suspension. CdS/(Pt-TiO 2 ) generated higher photocurrents than Pt-(CdS/TiO 2 ) by a factor of 2-7. The extreme sensitivity of the preparation method to the hydrogen production activity should be taken into account when hybrid photocatalysts are designed and prepared.

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“…Mixed compound semiconductors like Cd (1-x) Zn x S, Cd (1-x) Zn x Se, CdSe (1-X) Te X , In 1-x Ga x Sd 1-y As y have potential applications in the fabrication of Photoconductive, Photovoltaic and Solar cells in the field of electronic and optoelectronic devices [1,2]. These compounds have been prepared in thin film form by using sophisticated techniques [3][4][5] to help the process of miniaturization of electronic devices. In general, it is also not simple to prepare bulk material over a wide range of composition due to limited solubility.…”

Section: Introductionmentioning

confidence: 99%

Electrical and Thermoelectric properties of Cu doped Cd0.8Zn0.2S Compound prepared by modified Co-precipitation method

Hadasa¹,

Yellaiah²,

Sekharam³

et al. 2014

IOSRJAP

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Effect of the size-induced structural transformation on the band gap in CdS nanoparticles

Cited by 311 publications

References 20 publications

One-pot sonochemical synthesis of CdS nanoparticles: photocatalytic and electrical properties

One-pot sonochemical synthesis of CdS nanoparticles: photocatalytic and electrical properties

Effects of the preparation method of the ternary CdS/TiO2/Pt hybrid photocatalysts on visible light-induced hydrogen production

Electrical and Thermoelectric properties of Cu doped Cd0.8Zn0.2S Compound prepared by modified Co-precipitation method

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