Surface photovoltage spectra and photoelectrochemical properties of semiconductor-sensitized nanostructured TiO2 electrodes

Qian, Xinming; Qin, Dongqi; Song, Qi; Bai, Yubai; Li, Tiejin; Tang, Xinyi; Wang, Erkang; Dong, Shaojun

doi:10.1016/s0040-6090(01)00771-4

Cited by 70 publications

(44 citation statements)

References 47 publications

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“…Electrons trapped in the surface states appear to be responsible for the slow photocurrent response. 24,25 Figure 6 thus suggests that SWCN/TiO 2 facilitates a decrease of trapping surface states due to their blocking by SWCN, which is consistent with the photocurrent enhancement in this case.…”

Section: Resultssupporting

confidence: 80%

Photocurrent Improvement by Incorporation of Single-Wall Carbon Nanotubes in TiO₂Film of Dye-Sensitized Solar Cells

Jung¹,

Jang²,

Vittal

et al. 2003

Bulletin of the Korean Chemical Society

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Single-wall carbon nanotubes (SWCN) were integrated in TiO 2 film and the beneficial influence on the dyesensitized solar cells in terms of improved photocurrent was studied in the light of static J-V characteristics obtained both under illumination and in the dark, photocurrent transients, IPCE spectra and impedance spectra. Compared with a solar cell without SWCN, it is established that the photocurrent density of the modified cell increases at all applied potentials. The enhanced photocurrent density is correlated with the augmented concentration of electrons in the conduction band of TiO 2 and with increased electrical conductivity. Explanations are additionally corroborated with the help of SEM, Raman spectra and dye-desorption measurements.

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Section: Resultssupporting

confidence: 80%

Photocurrent Improvement by Incorporation of Single-Wall Carbon Nanotubes in TiO₂Film of Dye-Sensitized Solar Cells

Jung¹,

Jang²,

Vittal

et al. 2003

Bulletin of the Korean Chemical Society

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“…[18][19][20][21][22][23] This is due to the fact that the photogenerated electrons from CdS could be injected into the conduction band of TiO 2 , resulting in the PEC reaction. [24,25] Various structures of TiO 2 /CdS coupling systems have been reported in the literature, such as TiO 2 /CdS composite nanofilms, [26][27][28][29] NPs, [30] NRs, [31][32][33][34][35][36] and other TiO 2 /CdS hybrids.…”

Section: Introductionmentioning

confidence: 99%

CdS‐Encapsulated TiO₂ Nanotube Arrays Lidded with ZnO Nanorod Layers and Their Photoelectrocatalytic Applications

et al. 2010

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A novel TiO(2) nanotube array/CdS nanoparticle/ZnO nanorod (TiO(2) NT/CdS/ZnO NR) photocatalyst was constructed which exhibited a wide-absorption (200-535 nm) response in the UV/Vis region and was applied for the photoelectrocatalytic (PEC) degradation of dye wastewater. This was achieved by chemically assembling CdS into the TiO(2) NTs and then constructing a ZnO NR layer on the TiO(2) NT/CdS surface. Scanning electron microscopy (SEM) results showed that a new structure had been obtained. The TiO(2) NTs looked like many "empty bottles" and the ZnO NR layer served as a big lid. Meanwhile the CdS NPs were encapsulated between them with good protection. After being sensitized by the CdS NPs, the absorption-band edge of the obtained photocatalyst was obviously red-shifted to the visible region, and the band gap was reduced from its original 3.20 eV to 2.32 eV. Photoelectric-property tests indicated that the TiO(2) NT/CdS/ZnO NR material maintained a very high PEC activity in both the ultraviolet (UV) and the visible region. The maximum photoelectric conversion efficiencies of TiO(2) NT/CdS/ZnO NR were 31.8 and 5.98% under UV light (365 nm) and visible light (420-800 nm), respectively. In the PEC oxidation, TiO(2) NT/CdS/ZnO NR exhibited a higher removal ability for methyl orange (MO) and a high stability. The kinetic constants were 1.77×10(-4) s(-1) under UV light, which was almost 5.9 and 2.6 times of those on pure TiO(2) NTs and TiO(2) NT/ZnO NR, and 2.5×10(-4) s(-1) under visible light, 2.4 times those on TiO(2) NT/CdS.

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“…Qian et al [17] synthesized three kinds of TiO 2 nanostructured thin films consisting of different sized nanoparticles, 4.5, 5, and 15 nm. The films were prepared by applying a colloidal suspension of nanoparticles onto a piece of indium tin oxide (ITO) coated glass.…”

Section: Tio 2 and Its Nanostructures For Photoelectrochemical Applicmentioning

confidence: 99%

Advances in the application of nanotechnology in enabling a ‘hydrogen economy’

2008

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Hydrogen is gaining a great deal of attention as an energy carrier as well as an alternative fuel. However, in order to fully implement the so called 'hydrogen economy' significant technical challenges need to be overcome in the fields of production and storage of hydrogen and its point of use especially in fuel cells for the automotive industry. The purpose of this review is to present and discuss recent advances in the use of nanomaterials for solar hydrogen production and on-board solid state storage of hydrogen. The role of nanotechnology in enhancing the efficiency of fuel cells and reducing their cost is also discussed.

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Surface photovoltage spectra and photoelectrochemical properties of semiconductor-sensitized nanostructured TiO2 electrodes

Cited by 70 publications

References 47 publications

Photocurrent Improvement by Incorporation of Single-Wall Carbon Nanotubes in TiO₂Film of Dye-Sensitized Solar Cells

Photocurrent Improvement by Incorporation of Single-Wall Carbon Nanotubes in TiO₂Film of Dye-Sensitized Solar Cells

CdS‐Encapsulated TiO₂ Nanotube Arrays Lidded with ZnO Nanorod Layers and Their Photoelectrocatalytic Applications

Advances in the application of nanotechnology in enabling a ‘hydrogen economy’

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Surface photovoltage spectra and photoelectrochemical properties of semiconductor-sensitized nanostructured TiO2 electrodes

Cited by 70 publications

References 47 publications

Photocurrent Improvement by Incorporation of Single-Wall Carbon Nanotubes in TiO2Film of Dye-Sensitized Solar Cells

Photocurrent Improvement by Incorporation of Single-Wall Carbon Nanotubes in TiO2Film of Dye-Sensitized Solar Cells

CdS‐Encapsulated TiO2 Nanotube Arrays Lidded with ZnO Nanorod Layers and Their Photoelectrocatalytic Applications

Advances in the application of nanotechnology in enabling a ‘hydrogen economy’

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Photocurrent Improvement by Incorporation of Single-Wall Carbon Nanotubes in TiO₂Film of Dye-Sensitized Solar Cells

Photocurrent Improvement by Incorporation of Single-Wall Carbon Nanotubes in TiO₂Film of Dye-Sensitized Solar Cells

CdS‐Encapsulated TiO₂ Nanotube Arrays Lidded with ZnO Nanorod Layers and Their Photoelectrocatalytic Applications