Vertically aligned ZnO@CdS nanorod heterostructures for visible light photoinactivation of bacteria

Zirak, Mohammad; Akhavan, Omid; Moradlou, Omran; Nien, Yung-Tang; Moshfegh, A.Z.

doi:10.1016/j.jallcom.2013.12.158

Cited by 80 publications

(25 citation statements)

References 48 publications

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“…Based on our previous works [31,32], the successive ion layer adsorption and reaction (SILAR) method was employed for CdS nanoparticles loading. The ITO or WS 2 /ITO electrodes were separately immersed into 50 mM Cd(NO 3 ) 2 , and then 50 mM Na 2 S aqueous solutions for 20 s. The layers were rinsed with deionized (DI) water after each immersion step.…”

Section: Cds Nanoparticles Depositionmentioning

confidence: 99%

Controlled engineering of WS2 nanosheets–CdS nanoparticle heterojunction with enhanced photoelectrochemical activity

Zirak

Zhao

Moradlou

et al. 2015

Solar Energy Materials and Solar Cells

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a b s t r a c tWe report the well-controlled preparation of WS 2 nanosheets-CdS nanoparticle heterojunction for photoelectrochemical (PEC) water splitting application. The WS 2 nanosheets with an average thickness of $ 5 nm and lateral dimensions of $200 nm were synthesized via liquid phase exfoliation of bulk WS 2 in water/ethanol solution, followed by deposition onto ITO substrate via electrophoretic method. CdS nanoparticles were grown via facile successive ion layer absorption and reaction (SILAR) method. Using these two well-controlled methods, CdS/WS 2 /ITO and WS 2 /CdS/ITO systems were fabricated. The loading of WS 2 nanosheets was controlled by the deposition condition and the heterojunction was optimized for enhanced photoelectrochemical response under simulated sunlight irradiation. The fabricated electrodes were characterized by various analytical techniques as well as PEC response and electrochemical impedance spectroscopy (EIS). Our results showed that the CdS/WS 2 /ITO heterojunction exhibits a stable photo-current density which is 3 times higher than the CdS/ITO electrode. In contrast, photo-current density of the WS 2 /CdS/ITO electrode was lower than that of the bare CdS/ITO, indicating that an appropriate energy level cascade is essential for achieving enhanced PEC response. A charge transfer mechanism was proposed to explain the observed PEC enhancement. This work indicates that the exfoliated WS 2 nanosheet is a promising material for stable photoelectrochemical applications.

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Section: Cds Nanoparticles Depositionmentioning

confidence: 99%

Controlled engineering of WS2 nanosheets–CdS nanoparticle heterojunction with enhanced photoelectrochemical activity

Zirak

Zhao

Moradlou

et al. 2015

Solar Energy Materials and Solar Cells

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“…Unfortunately, the absorption of ZnO in the visible-light region is very low due to its wide bandgap [19,20]. To extend the absorption of ZnO into the visible region, narrow bandgap semiconductors, such as CdS, CdSe, and Cu 2 O, have been used to construct heterostructures with 1D ZnO [21][22][23][24]. Cuprous oxide (Cu 2 O), with a direct bandgap of 2.17 eV, is a natural p-type semiconductor owning good mobility and high minority carrier diffusion length [25,26].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, optical properties, and catalytic performance of Cu2O-modified ZnO nanorods prepared by electrodeposition

Jiang¹,

Lin²,

Zhang³

et al. 2016

Nano Online

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Cu 2 O-modified ZnO nanorods are prepared by a two-step electrodeposition method on ITO substrates, and the deposition time of Cu 2 O is 0, 1, 5, and 10 min, respectively. Cu 2 O particles are embedded in the interspaces of the ZnO nanorods, and the amounts of the Cu 2 O particles increase obviously when the deposition time lasts longer. The peaks corresponding to ZnO nanorods and Cu 2 O particles are detected from scanning electron microscope (SEM) and X-ray diffraction (XRD) results. UV-vis absorption spectra measurements have shown the bandgaps of ZnO nanorods shift from 3.22 to 2.75 eV. The methyl orange (MO) concentration can be reduced to around 15% in 100 min with Cu 2 O electrodeposition time for 10 min.

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“…Low dimensional nanoscale semiconducting metal oxide materials have attracted much attention because they have new functional properties with numerous applications [1][2][3]. Nanocrystalline CdO is an important n-type semiconductor metal oxide with rock-salt structure (FCC).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, FTIR, UV–Vis and Photoluminescence characterizations of triethanolamine passivated CdO nanostructures

Anandhan

Kumar²

2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Vertically aligned ZnO@CdS nanorod heterostructures for visible light photoinactivation of bacteria

Cited by 80 publications

References 48 publications

Controlled engineering of WS2 nanosheets–CdS nanoparticle heterojunction with enhanced photoelectrochemical activity

Controlled engineering of WS2 nanosheets–CdS nanoparticle heterojunction with enhanced photoelectrochemical activity

Microstructure, optical properties, and catalytic performance of Cu2O-modified ZnO nanorods prepared by electrodeposition

Synthesis, FTIR, UV–Vis and Photoluminescence characterizations of triethanolamine passivated CdO nanostructures

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