Understanding TiO<sub>2</sub>Photocatalysis: Mechanisms and Materials

Schneider, Jenny; Matsuoka, Makoto; Takeuchi, Masato; Zhang, Jinlong; Horiuchi, Yu; Anpo, Masakazu; Bahnemann, Detlef W.

doi:10.1021/cr5001892

Cited by 5,006 publications

(3,277 citation statements)

References 556 publications

(872 reference statements)

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“…Such a sandwich-structured PC design has much-increased light trapping effect, which can give rise to the extraordinary light absorbance of the TiO 2 without adding metallic materials such as gold, silver, aluminium and graphene or CdS Inverse Opals. [28][29][30][31][32] Moreover, we also observed an extended electron-hole lifetime in TiO 2 entirely owing to the light manipulation in S-IO-TiO 2 .…”

Section: Introductionsupporting

confidence: 53%

Sandwich-structured TiO₂ inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

et al. 2017

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To cite this version:Photon management has enabled a true revolution in the development of high-performance semiconductor materials and devices. Harnessing the highest amount of energy from photon relies on an ability to design and fashion structures to trap the light for the longer time inside the device for more electron excitation. The light harvesting efficiency in many thin-film optoelectronic devices is limited due to low photon absorbance. Here we demonstrate for the first time that slow photon circulation in sandwich-structured photonic crystals with two stopbands fine tuned are ideally suited to enhance and spectrally engineer light absorption. The sandwich-structured TiO 2 inverse opal possesses two stopbands, whose blue or red edge is respectively tuned to overlap with TiO 2 electronic excitation energy, thereby circulating the slow photons in the middle layer and enhancing light scattering at layer interfaces. This concept, together with the significantly increased control over photon management opens up tremendous opportunities for the realization of a wide range of highperformance, optoelectronic devices, and photochemical reactions.

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Section: Introductionsupporting

confidence: 53%

Sandwich-structured TiO₂ inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

et al. 2017

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“…The h + VB can also react with water to produce hydroxyl radicals ( • OH), hydrogen peroxide (H 2 O 2 ), or protonated superoxide radical ( • HO 2 ). Hydrogen peroxide can further react with • OH radicals to form • HO 2 [14,15]. The reactive oxygen species (ROS) such as…”

Section: Introductionmentioning

confidence: 99%

Antibacterial properties of F-doped ZnO visible light photocatalyst

Podporska-Carroll

Myles

Quilty

et al. 2017

Journal of Hazardous Materials

202

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“…Photocatalysis as a useful tool for the self-cleaning of glass, polymer thin films and textile fabric surfaces has recently been reported by Daoud [1][2][3][4], Kiwi [5][6][7][8], Hashimoto/Fujishima et al [9,10], Bahnemann [11][12][13], Radetic [14] and Pakkanen [15]. TiO 2 has been chosen as the standard photocatalyst used in the field of environmental photochemistry due to its stability, effective separation of charges under band-gap irradiation and availability of fairly pure samples.…”

Section: Introductionmentioning

confidence: 99%

“…There is nowadays a need to develop resistant photocatalysts presenting faster self-cleaning kinetics compared to TiO 2 and composite-TiO 2 surfaces which are too slow for many industrial applications [5][6][7][8][11][12][13]. The second area that needs improvement lies in the fact that most of the self-cleaning films are deposited from colloids on surfaces that are subsequently heated to diffuse and anneal the colloid into the surface at temperatures that fabrics and polymer films do not resist [5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Accelerated self-cleaning by Cu promoted semiconductor binary-oxides under low intensity sunlight irradiation

Rtimi

Pulgarín

Sanjinés

2016

Applied Catalysis B: Environmental

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a b s t r a c tUniform adhesive TiO 2 -ZrO 2 films co-sputtered on polyester (PES) under low intensity sunlight irradiation discolored methylene blue (MB) within 120 min. The discoloration kinetics was seen to be accelerated by a factor four by TiO 2 -ZrO 2 -Cu containing ∼0.01% Cu, as determined by X-ray fluorescence (XRF). TiO 2 -ZrO 2 -Cu also increased also accelerated by a factor the discoloration of MB compared to TiO 2 /Cu(PES). MB discoloration was also monitored under visible light in the solar cavity by using a 400 nm cutoff filter. Photocatalyst surfaces were characterized by spectroscopic methods showing the film optical absorption and by X-ray photoelectron spectroscopy (XPS), the surface atomic percentage concentration up to 120 nm (∼600 layers). The band-gaps of TiO 2 -ZrO 2 and TiO 2 -ZrO 2 -Cu were estimated for films co-sputtered for different times. By Fourier transform attenuated infrared spectroscopy (ATR-FTIR), the systematic shift of the predominating s (CH 2 ) vibration-rotational MB bands was monitored up to complete MB discoloration under low intensity solar simulated light. Evidence is presented for the OH • generation by TiO 2 -ZrO 2 -Cu participating in the self-cleaning mechanism. The photo-induced interfacial charge transfer (IFCT) on the TiO 2 -ZrO 2 -Cu is discussed in terms of the electronic band positions of the binary oxides and Cu intra-gap states. This study presents the first evidence for a Cu-promoted composed of two binary oxide semiconductors accelerating the self-cleaning performance.

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Understanding TiO₂Photocatalysis: Mechanisms and Materials

Cited by 5,006 publications

References 556 publications

Sandwich-structured TiO₂ inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

Sandwich-structured TiO₂ inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

Antibacterial properties of F-doped ZnO visible light photocatalyst

Accelerated self-cleaning by Cu promoted semiconductor binary-oxides under low intensity sunlight irradiation

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Understanding TiO2Photocatalysis: Mechanisms and Materials

Cited by 5,006 publications

References 556 publications

Sandwich-structured TiO2 inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

Sandwich-structured TiO2 inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

Antibacterial properties of F-doped ZnO visible light photocatalyst

Accelerated self-cleaning by Cu promoted semiconductor binary-oxides under low intensity sunlight irradiation

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Product

Resources

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Understanding TiO₂Photocatalysis: Mechanisms and Materials

Sandwich-structured TiO₂ inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

Sandwich-structured TiO₂ inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency