Microstructure and optical absorption properties of Au-dispersed CoO thin films

Wang, Shi-Jing; Zhang, Bo‐Ping; Yan, Liping; Deng, Wei

doi:10.1016/j.jallcom.2011.02.154

Cited by 17 publications

(14 citation statements)

References 34 publications

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“…The absorption peaks manifest a red shift with increasing Ag content from 6 to 15 at.% and a blue-shift by further increasing Ag content to 20 at.%. It is well known that the position of SPR peak is affected by the metal nanoparticles size [39], whose decreasing contributes to the blue shift due to the quantum size effect [27,40], and the position is also related to the effect of charge transfer between metal and oxide [27]. Along with the similar behavior from Au/CoO films [27], it is suggested that in addition of the quantum size effect, the charge transfer between Ag and SiO 2 makes an important contribution to the observed red/blue shift of the absorption peaks.…”

Section: Resultsmentioning

confidence: 99%

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Optical and photocatalytic properties of TiO2/Ag–SiO2 nanocomposite thin films

Zhao

Zhang

et al. 2012

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 99%

“…Moreover, the noble metals deposited SiO 2 thin films [23,24] and TiO 2 thin films [25][26][27][28] were prepared to improve the recycle property of the photocatalyst. To the best of our knowledge, metal deposited bis-oxide thin film as photocatalyst has hardly been reported so far.…”

Section: Introductionmentioning

confidence: 99%

Optical and photocatalytic properties of TiO2/Ag–SiO2 nanocomposite thin films

Zhao

Zhang

et al. 2012

Journal of Alloys and Compounds

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“…Accompanying SPR shift is the sharpening of the peak with annealing temperature increasing, which is attributed to the enhanced intrinsic free electron oscillation inside metal particles. The broadening of the related SPR band may be due to the mean free path effect as well as the influence of conduction electron collisions with particle surfaces [15]. The blueshift accompanying a narrowing of the peak in the films annealed from 500 to 800°C is related to the decrease in Ni content and Ni particle size.…”

Section: Resultsmentioning

confidence: 96%

“…All films exhibit an absorption peak in the wavelength region of 300-330 nm due to the SPR of Ni particles [14]. With annealing temperature increasing from 300 to 500°C, the Ni content of films decreases; however, because of Ni particle size and the increase of its uniformity, the intensity of the absorption peaks increases and the bandwidth of the absorption peaks also broadens [15]. The SPR peaks exhibit a redshift from 330.44 to 341.81 nm.…”

Section: Resultsmentioning

confidence: 99%

Surface plasmon resonance and electrical properties of RF: magnetron sputtered carbon–nickel composite films at different annealing temperatures

2015

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In this work, the optical absorption spectra of carbon-nickel films annealed at different temperatures (300-1000°C) with a special emphasis on the surface plasmon resonance (SPR) were investigated. The films were grown on quartz substrates by radio-frequency (RF) magnetron co-sputtering at room temperature with a deposition time of 600 s. The optical absorption peaks due to the SPR of Ni particle are observed in the wavelength range of 300-330 nm. With annealing temperature increasing up to 500°C due to the increase in Ni particle size, the intensity of the SPR peaks increases, but weakens with annealing temperature increasing over 500°C. The Ni nanoparticle size, the dielectric function of carbon matrix (e m ) and the plasma frequency of the free electrons (x p ) at 500°C have the maximum values of 21.63 nm, 0.471 and 5.26 9 10 15 s -1 , respectively. The absorption peak shows a redshift trend up to 500°C and then turn to blueshift with annealing temperature increasing over 500°C. These observations are in a good agreement with the electrical measurements in temperature range of 15-520 K and the Maxwell-Garnett (M-G) effective medium theory (EMT).

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“…However, pure TiO 2 , because of its wide band gap (anatase 3.2 eV), can only be excited by UV light, which accounts for only a small part of the solar spectrum [19][20][21][22]. Thus, making full use of solar energy has become an important current research topic.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of bipolar membranes modified by cystine-modified TiO2 visible-light photocatalyst

Liu

Chen

et al. 2013

Res Chem Intermed

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A cystine-modified TiO 2 visible-light photocatalyst was prepared by the sol-gel method and characterized by X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), and X-ray photoelectron spectroscopy (XPS). The XRD results showed the cystine-modified TiO 2 was in the anatase phase, but with reduced size. UV-Vis DRS indicated that cystine-modification could reduce the band gap of TiO 2 and enhance the absorption of visible light. The XPS spectra showed that the cystine-modified TiO 2 sample contained C, N, and S, and that some of the C, N, and S entered the TiO 2 lattice. The cystinemodified TiO 2 visible-light photocatalyst was added to a chitosan (CS) anionexchange layer to prepare PVA-CMC/modified TiO 2 -PVA-CS bipolar membrane (BPM; here, PVA denotes poly(vinyl alcohol), CMC denotes carboxymethylcellulose, and the solidus ''/'' denotes the interlayer) by a paste method. The membrane was characterized by determination of contact angle, J-V characteristics, and AC impedance spectroscopy, among other techniques. Experimental results showed that the cystine-modified TiO 2 visible-light photocatalyst was a better photocatalyst than TiO 2 for splitting of water at the interlayer of the BPM. The membrane impedance and trans-membrane voltage drop (IR drop) of the modified BPM clearly decreased under sunlight irradiation. At a current density of 60 mA/cm 2 , the cell voltage of the PVA-CMC/modified TiO 2 -PVA-CS BPM decreased by 0.9 V. Moreover, the hydrophilicity of the modified BPM was increased and its mechanical properties were improved.

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Microstructure and optical absorption properties of Au-dispersed CoO thin films

Cited by 17 publications

References 34 publications

Optical and photocatalytic properties of TiO2/Ag–SiO2 nanocomposite thin films

Optical and photocatalytic properties of TiO2/Ag–SiO2 nanocomposite thin films

Surface plasmon resonance and electrical properties of RF: magnetron sputtered carbon–nickel composite films at different annealing temperatures

Preparation and characterization of bipolar membranes modified by cystine-modified TiO2 visible-light photocatalyst

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