Metal‐Cluster‐Decorated TiO<sub>2</sub> Nanotube Arrays: A Composite Heterostructure toward Versatile Photocatalytic and Photoelectrochemical Applications

Xiao, Fei; Hung, Sung‐Fu; Miao, Jianwei; Wang, Hsin‐Yi; Yang, Hongbin; Liu, Bin

doi:10.1002/smll.201401919

Cited by 252 publications

(212 citation statements)

References 75 publications

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“…In recent years, two-dimensional (2D) flakes decorated on one-dimensional (1D) semiconductor nanostructures to form three-dimensional (3D) heterostructures with 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 versatile properties have been effectively fabricated and highly regarded in various applications, including batteries, photodetectors and photocatalysis [1][2][3][4][5] . Among these 1D semiconductor nanostructures, TiO 2 has attracted great attention in the H 2 or O 2 production and the decomposition of pollutants [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

3D Bi₂MoO₆ Nanosheet/TiO₂ Nanobelt Heterostructure: Enhanced Photocatalytic Activities and Photoelectochemistry Performance

2015

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We employed TiO 2 nanobelts as the synthetic template and developed three-dimensional (3D) porous Bi 2 MoO 6 nanosheet/TiO 2 nanobelt heterostructures with a few-layer and uniform Bi 2 MoO 6 nanosheets by a simple hydrothermal method.The as-prepared Bi 2 MoO 6 nanosheet/TiO 2 nanobelt heterostructure shows an excellent photodegradation performance under UV and visible light irradiation.Importantly, such a heterostructure possesses high photocatalytic oxygen production with the rate of 0.668 mmol h −1 g −1 . Moreover, the Bi 2 MoO 6 nanosheet/TiO 2 nanobelt heterostructure shows an enhanced photoelectochemistry (PEC) performance under irradiation of solar illumination. The current research can offer an alternative route for designing 3D heterostructure system to effectively utilize the broad spectrum solar light.

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Section: Introductionmentioning

confidence: 99%

3D Bi₂MoO₆ Nanosheet/TiO₂ Nanobelt Heterostructure: Enhanced Photocatalytic Activities and Photoelectochemistry Performance

2015

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“…PL spectra are often utilized to study the surface processes involving the electron-hole fate of the semiconductor. 34 As can be seen, the PL emission intensity of Ag 3 PO 4 /TNR decreases rapidly compared to that of TNR, indicating that the deposition of Ag 3 PO 4 particles improve the charge separation effectively. It is therefore reasonable to conclude that the effective interfacial charge transfer between Ag 3 PO 4 and TNR plays a key role in enhancing the photocatalytic activity of the sample.…”

Section: Resultsmentioning

confidence: 87%

Ultrasound-Assisted Fabrication of AgBr/Ag₃PO₄/TiO₂Nanorod Heterostructure on Ti Mesh

Xi¹,

Li²,

Wu³

et al. 2015

ECS J. Solid State Sci. Technol.

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TiO 2 nanorod (TNR) deposited by AgBr/Ag 3 PO 4 nanoparticles was fabricated on Ti mesh substrate through ultrasound-assisted successive ionic layer adsorption and reaction technology. It was revealed that the ultrasound-assisted process is helpful in ensuring uniform deposition of Ag 3 PO 4 on the surface of TNR and in inhibiting the accumulation of Ag 3 PO 4 nanoparticles. The concentration of KBr and the adsorption duration strongly influence the deposition of AgBr. The enhanced photocatalytic activity of Ag 3 PO 4 /TNR toward methyl orange compared to that of pure TNR is attributed to the enhanced adsorption ability of visible light and to the efficient charge carrier separation owing to the surface plasmon resonance (SPR) effect of Ag 3 PO 4 /Ag/TNR system. The further enhanced photocatalytic activity of the heterostructured AgBr/Ag 3 PO 4 /TNR is attributed to the SPR effect resulting from the evolution of AgBr/Ag/Ag 3 PO 4 /TNR heterostructures and the synergistic energy band structure of Ag 3 PO 4 , AgBr, and TNR.Steadily worsening environmental pollution and energy shortages have raised human awareness of a potential global crisis. 1 Photocatalytic degradation is considered to be an attractive strategy for water decontamination due to its fast and complete mineralization of pollutants without leaving behind any harmful residues. TiO 2 is one of the most renowned photocatalysts due to its chemical stability, nontoxicity, low cost, and favorable optoelectronic properties. 2 However, the fast recombination of photogenerated electrons and holes, and the low efficiency for utilizing visible light are the two major drawbacks restricting its practical applications. Therefore, efforts have been paid to improve the photocatalytic performance of TiO 2 .A dimension-controlled TiO 2 -based nanostructure array is believed to increase the separation rate of photogenerated electrons and holes because of its unique reaction sites, increased optical path lengths, and low reflection, direct electronic carrier transport path ways. 3-5 Meanwhile, flexible substrates with large surface area are believed to increase the absorption of light. Guo 6 reported nanostructure TiO 2 nanorod (TNR) arrays grown on carbon fibers for dyesensitized solar cell (DSSC) use. Liao et al. have also indicated that TiO 2 nanotube arrays synthesized on Ti mesh have achieved enhanced efficiency of DSSC compared to that of TiO 2 nanotube arrays prepared on Ti foil. 7 On the other hand, varied strategies have been used to increase the utilization of the visible range of the solar spectrum, such as modification with dopant, 8,9 sensitization with CdS, CdSe, 10,11 hydrogenation, 12,13 etc. In recent years, photocatalysts of Ag-AgX (X = Cl, Br, I, S), 14-16 Ag 3 PO 4 , 17,18 Ag 3 CO 3 , 19,20 and Ag 3 VO 4 21 have attracted considerable attention as visible light photocatalysts for specific applications. However, a single Ag-based component may be not a good photocatalyst due to its easy decomposition into Ag under light irradiation 22 and the high elec...

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“…This enhanced visible-infrared absorption might be attributed to the N doping and/or Vo and/or the nanoporous pine-cone structure. Nanoporous-layer-covered on the TiO2 nanotube arrays were reported as photonic crystals with a substantial optical absorption even in the infrared region [51][52][53]. Some oscillations in absorbance might also be due to optical interference.…”

Section: Lattice Defects and Optical Absorptionmentioning

confidence: 99%

Fast and Large-Scale Anodizing Synthesis of Pine-Cone TiO2 for Solar-Driven Photocatalysis

et al. 2017

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Anodization has been widely used to synthesize nanostructured TiO 2 films with promising photocatalytic performance for solar hydrogen production and pollution removal. However, it usually takes a few hours to obtain the right nanostructures even on a small scale (e.g., 10 mm × 20 mm). In order to attract interest for industrial applications, fast and large-scale fabrication is highly desirable. Herein, we demonstrate a fast and large-scale (e.g., 300 mm × 360 mm) synthesis of pine-cone TiO 2 nanostructures within two min. The formation mechanism of pine-cone TiO 2 is proposed. The pine-cone TiO 2 possesses a strong solar absorption, and exhibits high photocatalytic activities in photo-oxidizing organic pollutants in wastewater and producing hydrogen from water under natural sunlight. Thus, this study demonstrates a promising method for fabricating TiO 2 films towards practical photocatalytic applications.

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Metal‐Cluster‐Decorated TiO₂ Nanotube Arrays: A Composite Heterostructure toward Versatile Photocatalytic and Photoelectrochemical Applications

Cited by 252 publications

References 75 publications

3D Bi₂MoO₆ Nanosheet/TiO₂ Nanobelt Heterostructure: Enhanced Photocatalytic Activities and Photoelectochemistry Performance

3D Bi₂MoO₆ Nanosheet/TiO₂ Nanobelt Heterostructure: Enhanced Photocatalytic Activities and Photoelectochemistry Performance

Ultrasound-Assisted Fabrication of AgBr/Ag₃PO₄/TiO₂Nanorod Heterostructure on Ti Mesh

Fast and Large-Scale Anodizing Synthesis of Pine-Cone TiO2 for Solar-Driven Photocatalysis

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Metal‐Cluster‐Decorated TiO2 Nanotube Arrays: A Composite Heterostructure toward Versatile Photocatalytic and Photoelectrochemical Applications

Cited by 252 publications

References 75 publications

3D Bi2MoO6 Nanosheet/TiO2 Nanobelt Heterostructure: Enhanced Photocatalytic Activities and Photoelectochemistry Performance

3D Bi2MoO6 Nanosheet/TiO2 Nanobelt Heterostructure: Enhanced Photocatalytic Activities and Photoelectochemistry Performance

Ultrasound-Assisted Fabrication of AgBr/Ag3PO4/TiO2Nanorod Heterostructure on Ti Mesh

Fast and Large-Scale Anodizing Synthesis of Pine-Cone TiO2 for Solar-Driven Photocatalysis

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Metal‐Cluster‐Decorated TiO₂ Nanotube Arrays: A Composite Heterostructure toward Versatile Photocatalytic and Photoelectrochemical Applications

3D Bi₂MoO₆ Nanosheet/TiO₂ Nanobelt Heterostructure: Enhanced Photocatalytic Activities and Photoelectochemistry Performance

3D Bi₂MoO₆ Nanosheet/TiO₂ Nanobelt Heterostructure: Enhanced Photocatalytic Activities and Photoelectochemistry Performance

Ultrasound-Assisted Fabrication of AgBr/Ag₃PO₄/TiO₂Nanorod Heterostructure on Ti Mesh