Aligned Fe2TiO5-containing nanotube arrays with low onset potential for visible-light water oxidation

Liu, Qinghua; He, Jingfu; Yao, Takeshi; Sun, Zhihu; Cheng, Weiren; He, Shi; Xie, Yi; Peng, Yanhua; Cheng, Hao; Sun, Yongfu; Jiang, Yong; Hu, Fengchun; Xie, Zhi; Yan, Wensheng; Pan, Zhiyun; Wu, Ziyu; Wei, Shiqiang

doi:10.1038/ncomms6122

Cited by 174 publications

(114 citation statements)

References 47 publications

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“…In contrast, blank TiO 2 nanotube layers show IPCE only about 60% in the UV region (350 nm). As shown in Figure b, in the case of thicker nanotube layers, Ti/TiO 2 (6 μm), the blank TiO 2 nanotube layers show a IPCE of ≈30% in the UV region (350 nm) which is consistent with previous reports . After coupling with CIS nanocrystals, a stronger sensitizing effect is observed for Ti/TiO 2 (6 μm)/CIS nanotube layers in the UV as well as in the VIS light range.…”

Section: Figuresupporting

confidence: 90%

Electrochemical Infilling of CuInSe₂ within TiO₂ Nanotube Layers and Subsequent Photoelectrochemical Studies

et al. 2017

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Anodic self‐organized TiO2 nanotube layers (with different aspect ratios) were electrochemically infilled with CuInSe2 nanocrystals with the aim to prepare heterostructures with a photoelectrochemical response in the visible light. The resulting heterostructure assembly was confirmed by field‐emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and X‐ray diffraction (XRD). High incident photon‐to‐electron conversion efficiency values exceeding 55% were obtained in the visible‐light region. The resulting heterostructures show promise as a candidate for solid‐state solar cells.

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Section: Figuresupporting

confidence: 90%

Electrochemical Infilling of CuInSe₂ within TiO₂ Nanotube Layers and Subsequent Photoelectrochemical Studies

et al. 2017

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“…Similar results were also obtained by TiO 2 nanotube arrays sensitized with CdS nanoparticles deposited through sequential chemical bath reactions . As reported by Liu et al, an ultrathin Fe 2 TiO 5 layer was incorporated onto the surface of TiO 2 nanotube arrays . After the decoration of Co‐based cocatalysts, the obtained heterostructured photoelectrode manifests a low onset potential of about 0.2 V versus RHE and a high energy conversion efficiency of about 2.7% for PEC water oxidation.…”

Section: Heterostructured Photocatalysts With Open Hollow Structuressupporting

confidence: 83%

Design of Heterostructured Hollow Photocatalysts for Solar‐to‐Chemical Energy Conversion

2019

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Direct conversion of solar energy into chemical energy in a sustainable manner is one of the most promising solutions to the energy crisis and environmental issues. Fabrication of highly active photocatalysts is of great significance for the practical applications of efficient solar‐to‐chemical energy conversion systems. Among various photocatalytic materials, semiconductor‐based heterostructured photocatalysts with hollow features show distinct advantages. Recent research efforts on rational design of heterostructured hollow photocatalysts toward photocatalytic water splitting and CO2 reduction are presented. First, both single‐shelled and multishelled heterostructured photocatalysts are surveyed. Then, heterostructured hollow photocatalysts with tube‐like and frame‐like morphologies are discussed. It is intended that further innovative works on the material design of high‐performance photocatalysts for solar energy utilization can be inspired.

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“…Semiconductor-based photocatalysis has attracted much attention as a potential solution for dealing with the global energy crisis and environmental pollution [1][2][3][4]. Among various types of semiconductors, TiO 2 has been the most suitable for widespread environmental applications due to its strong oxidizing ability.…”

Section: Introductionmentioning

confidence: 99%

BiVO4/3DOM TiO2 nanocomposites: Effect of BiVO4 as highly efficient visible light sensitizer for highly improved visible light photocatalytic activity in the degradation of dye pollutants

Zalfani

et al. 2017

Applied Catalysis B: Environmental

105

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The effect of the amount of BiVO 4 as visible light sensitizer on the photocatalytic activity of BiVO 4 /3DOM TiO 2 nanocomposites was highlighted. The low amount of BiVO 4 nanoparticles favors the transfer of photogenerated electrons to 3DOM TiO 2 while photogenerated electrons will remain at the surface of BiVO 4 at high amount of BiVO 4 , leading to the recombination of electrons-holes and reduced photocatalytic activity. 1 0 0.6 0.4 0.2 0.08 0.04 0.0209 0.0381 0.0256 0.0152 0.110 0.0078 0.0062 100 75 50 25 10 5 0 0.040 0.035 0.030 0.025 0.020 0.015 0.010 0.005 0.000 Rate Constant (min -1 ) mol % BiVO 4 -1 0 1 2 3 E (NHE) CB VB O 2 /O 2 .-OH . /H 2 O Oxidation Highlights -BiVO 4 @3DOM TiO 2 exhibit highly enhanced visible light photocatalytic activity -The effect of the amount of BiVO 4 as visible light sensitizer is highlighted -The electronic interactions BiVO 4 /TiO 2 lead to an improved charge separation -High BiVO 4 content leads to the accumulation of the electron/hole pairs at the surface of the BiVO 4 4 Abstract A series of BiVO 4 /3DOM TiO 2 nanocomposites have been synthesized and their photocatalytic activity was investigated under visible light irradiation using the RhB dye as model pollutant molecule in an aqueous solution. The effect of the amount of BiVO 4 as visible light sensitizer on the photocatalytic activity of BiVO 4 /3DOM TiO 2 nanocomposites was highlighted. The heterostructured composite system leads to much higher photocatalytic efficiencies than bare 3DOM TiO 2 and BiVO 4 nanoparticles. As the proportion of BiVO 4 in BiVO 4 /3DOM TiO 2 nanocomposites increases from 0.04 to 0.6, the photocatalytic performance of the BiVO 4 /3DOM TiO 2 nanocomposites increases and then decreases after reaching a maximum at 0.2. This improvement in photocatalytic perfomance is related to 1) the interfacial electron transfer efficiency between the coupled materials, 2) the 3DOM TiO 2 inverse opal structure with interconnected pores providing an easy mass transfer of the reactant molecules and high accessibility to the active sites and large surface area and 3) the effect of light sensitizer of BiVO 4 . Intensive studies on structural, textural, optical and surface properties reveal that the electronic interactions between BiVO 4 and TiO 2 lead to an improved charge separation of the coupled BiVO 4 /TiO 2 system. The photogenerated charge carrier densities increase with increasing the BiVO 4 content, which acts as visible light sensitizer to the TiO 2 and is responsible for the enhancement in the rate of photocatalytic degradation. However, the photocatalytic activity is reduced when the BiVO 4 amount is much higher than that of 3DOM TiO 2 . Two reasons could account for this behavior. First, with increasing BiVO 4 content, the photogenerated electron/hole pairs are accumulated at the surface of the BiVO 4 nanoparticles and the recombination rate increases as shown by the PL results. Second, decreasing the amount of 3DOM TiO 2 in the nanocomposite decreases the surface area as shown by the BET results. Mo...

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Aligned Fe2TiO5-containing nanotube arrays with low onset potential for visible-light water oxidation

Cited by 174 publications

References 47 publications

Electrochemical Infilling of CuInSe₂ within TiO₂ Nanotube Layers and Subsequent Photoelectrochemical Studies

Electrochemical Infilling of CuInSe₂ within TiO₂ Nanotube Layers and Subsequent Photoelectrochemical Studies

Design of Heterostructured Hollow Photocatalysts for Solar‐to‐Chemical Energy Conversion

BiVO4/3DOM TiO2 nanocomposites: Effect of BiVO4 as highly efficient visible light sensitizer for highly improved visible light photocatalytic activity in the degradation of dye pollutants

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Aligned Fe2TiO5-containing nanotube arrays with low onset potential for visible-light water oxidation

Cited by 174 publications

References 47 publications

Electrochemical Infilling of CuInSe2 within TiO2 Nanotube Layers and Subsequent Photoelectrochemical Studies

Electrochemical Infilling of CuInSe2 within TiO2 Nanotube Layers and Subsequent Photoelectrochemical Studies

Design of Heterostructured Hollow Photocatalysts for Solar‐to‐Chemical Energy Conversion

BiVO4/3DOM TiO2 nanocomposites: Effect of BiVO4 as highly efficient visible light sensitizer for highly improved visible light photocatalytic activity in the degradation of dye pollutants

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Electrochemical Infilling of CuInSe₂ within TiO₂ Nanotube Layers and Subsequent Photoelectrochemical Studies

Electrochemical Infilling of CuInSe₂ within TiO₂ Nanotube Layers and Subsequent Photoelectrochemical Studies