Synthesis and characterization of nanocrystalline Zn1−xMxO (M=Ni, Cr) thin films for efficient photoelectrochemical splitting of water under UV irradiation

Sharma, Vidhika; Kumar, Pushpendra; Shrivastava, J. P.; Solanki, Anjana; Satsangi, Vibha R.; Dass, Sahab; Shrivastav, Rohit

doi:10.1016/j.ijhydene.2011.01.004

Cited by 39 publications

(24 citation statements)

References 31 publications

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“…It has been established that some spinels have advanced gas sensing and catalytic properties [4], so ZnCr 2 O 4 could be a suitable sensors for aggressive environments because chromium improves the stability of ZnO films against diluted hydrochloric and nitric acid media [5]. Besides Cr 2 O 3 -ZnO materials, specially prepared in nanocrystalline state are interesting systems for H 2 production via photoelectrochemical splitting of water [6].…”

Section: Introductionmentioning

confidence: 99%

Solid State Reactions in Cr2O3-ZnO Nanoparticles Synthesized by Triethanolamine Chemical Precipitation

Esparza¹,

Paredes²,

Martı́nez³

et al. 2011

MSA

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Section: Introductionmentioning

confidence: 99%

Solid State Reactions in Cr2O3-ZnO Nanoparticles Synthesized by Triethanolamine Chemical Precipitation

Esparza¹,

Paredes²,

Martı́nez³

et al. 2011

MSA

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“…The method permits deposition of high-purity metal nanoparticles on substrates of varying sizes and shapes, with greater control over the density [22]. In continuation to our previous reports on PEC splitting of water, using nanostructured undoped/doped metal oxides, the present work is an endeavor to enhance the PEC performance of [23][24][25][26][27][28]. The study deals with the surface deposition of silver (Ag)/gold (Au) nano-isles, on ZnO thin films, which was carried out at fixed potentials, for time duration ranging 5-60 s. The sample films were characterized by X-ray diffractometry (XRD), UV-Visible spectrometry, scanning electron microscopy (SEM), and atomic force microscopy (AFM).…”

Section: Introductionmentioning

confidence: 79%

“…Ag-ZnO NaOH (pH 12) 500 1.52 [24] 120 MeV Ag 9? ZnO NaOH (pH 13) 500 0.22 [28] TiO 2 /Au NaOH (0.05 M) 500 0.55 [36] TiO 2 /Au NaOH (0.05 M) 750 0.42 [37] …”

Section: Discussionunclassified

Surface deposition of Ag and Au nano-isles on ZnO thin films yields enhanced photoelectrochemical splitting of water

et al. 2015

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Nanostructured zinc oxide thin films, prepared by sol-gel, were subjected to surface loading of silver/gold nano-isles by controlled electrodeposition, using aqueous solutions (10 -2 M) of silver nitrate and chloroauric acid as precursor. The deposition potentials were, respectively, -400 and -200 mV for silver and gold depositions, as the deposition time varied from 5 to 60 s. Pristine samples (i.e., samples with no deposition of metal nano-isles) were also obtained for comparison. X-ray diffractometry indicated dominant evolution of wurtzite zinc oxide phase, with a possible diffusion of silver/gold into zinc oxide lattice. However, changes in the band gap energy were insignificant. Atomic force microscopic and scanning electron microscopic analyses revealed the surface topography and morphology. Energy-dispersive X-ray analysis confirmed the elemental stoichiometry and existence of silver and gold nanoparticles in films. Samples exhibited significant gain in photoelectrochemical water splitting current, which is largely attributable to the facilitative role played by silver/gold nano-isles in the separation and transport of photogenerated charge-carriers.

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“…Pure semiconductors are generally highly resistive at room temperature, impurity doping is largely intended to improve electrical conduction either by raising the number of charge carriers and/ or by increasing the carrier mobility of the material. The incorporation of Ru, Cu, Ni, Cr decreased the band gap of ZnO effectively by introducing intra band gap states and increased the efficiency of PEC system remarkably 34,35 . Sometimes these particles also serve as traps for charge carriers thereby reduced the recombination of charge carriers and results in enhance photocurrent 12 .…”

Section: Heterostructuresmentioning

confidence: 99%

Photoelectrochemical splitting of water to produce a power appetizer Hydrogen: A green system for future –( A short review)

Kumar¹,

Sharma²,

Singh³

et al. 2016

Orient. J. Chem

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To meet the future energy demand, Hydrogen has been accepted as a fuel for future. Out of several renewable methods to produce hydrogen, solar assisted splitting of water (Photoelectrochemical splitting of water) is emerging as a most desired method to produce hydrogen which is a advancement of Photovoltaic process. However, the efficiency of PEC cell is a matter of concern. Various strategies have been adopted by different researchers to increase the efficiency of the system especially using nanotechnology as a tool. In this article, attempts have been made to summarise different approaches applied to obtain effective and viable photoelectrochemical system for splitting water to obtain hydrogen an energy carrier.

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Synthesis and characterization of nanocrystalline Zn1−xMxO (M=Ni, Cr) thin films for efficient photoelectrochemical splitting of water under UV irradiation

Cited by 39 publications

References 31 publications

Solid State Reactions in Cr<sub>2</sub>O<sub>3</sub>-ZnO Nanoparticles Synthesized by Triethanolamine Chemical Precipitation

Solid State Reactions in Cr<sub>2</sub>O<sub>3</sub>-ZnO Nanoparticles Synthesized by Triethanolamine Chemical Precipitation

Surface deposition of Ag and Au nano-isles on ZnO thin films yields enhanced photoelectrochemical splitting of water

Photoelectrochemical splitting of water to produce a power appetizer Hydrogen: A green system for future –( A short review)

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Synthesis and characterization of nanocrystalline Zn1−xMxO (M=Ni, Cr) thin films for efficient photoelectrochemical splitting of water under UV irradiation

Cited by 39 publications

References 31 publications

Solid State Reactions in Cr&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-ZnO Nanoparticles Synthesized by Triethanolamine Chemical Precipitation

Solid State Reactions in Cr&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-ZnO Nanoparticles Synthesized by Triethanolamine Chemical Precipitation

Surface deposition of Ag and Au nano-isles on ZnO thin films yields enhanced photoelectrochemical splitting of water

Photoelectrochemical splitting of water to produce a power appetizer Hydrogen: A green system for future –( A short review)

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Solid State Reactions in Cr<sub>2</sub>O<sub>3</sub>-ZnO Nanoparticles Synthesized by Triethanolamine Chemical Precipitation

Solid State Reactions in Cr<sub>2</sub>O<sub>3</sub>-ZnO Nanoparticles Synthesized by Triethanolamine Chemical Precipitation