Low-temperature crystallization of TiO2 nanotube arrays via hot water treatment and their photocatalytic properties under visible-light irradiation

Krengvirat, Warapong; Sreekantan, Srimala; Noor, Ahmad-Fauzi Mohd; Negishi, Nobuaki; Kawamura, Go; Muto, Hiroyuki; Matsuda, Atsunori

doi:10.1016/j.matchemphys.2012.11.013

Cited by 37 publications

(21 citation statements)

References 62 publications

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“…Crystallization is often performed by calcination at temperatures above 400 • C [12,18,19,38], but would degrade the supporting membrane material. Low-temperature crystallization with water [18,[39][40][41] is a low-cost alternative compared to calcination. Water acts as a catalyst linking TiO 6 2− octahedra together to share edges leading to anatase [18,[39][40][41].…”

Section: Of 14mentioning

confidence: 99%

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

et al. 2017

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Removing pollutants from water by using the photocatalyst TiO 2 is a highly-promising method. A large amount of work has been done to increase the activity of TiO 2 , whereas the main two findings are increasing the surface area and applying mixed phase modifications (anatase, brookite, and rutile). Here, we present a method to directly synthesize non-agglomerated TiO 2 nanoparticles with different crystal phase ratios via low temperature dissolution-precipitation (LTDRP) on a porous microfiltration membrane (polyethersulfone). The amount of hydrochloric acid and the temperature was varied between 0.1-1 M and 25-130 • C, respectively, while the concentration of titanium precursor (titanium(IV) isopropoxide) was kept unchanged. The TiO 2 nanoparticles and the membrane were thoroughly characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), measuring the water contact angle and permeation flux, and examining the degradation of methylene blue. The mixed phase anatase/brookite with a main component being anatase exhibited the highest photocatalytic activity in removing methylene blue. Higher synthesis temperature induces enhanced crystallinity and, subsequently, the degradation rate of methylene blue was improved. Additionally, the photocatalytic activity remains high and unchanged for up to nine repeated cycles, i.e., full recovery of the photocatalytic properties is sustained.

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Section: Of 14mentioning

confidence: 99%

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

et al. 2017

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“…Up to today, many posttreatment methods for the construction of high efficient TNAs photocatalyst, such as annealing in specific gas atmosphere [100,101], hydrothermal treatment [102,103], and vapor-thermal treatment [104], have been generally used to synthesize special crystallized TNAs with high devices performance. Annealing the anodic TNAs through a derivative annealing method in a sealed container with specific environments, such as oxygen-rich (O 2 ), oxygen-deficient (Ar, N), and other reducing (H 2 ) gas, can modify the TNAs crystal structure, morphology, and electronic properties and influence the photocatalytic performance [105][106][107].…”

Section: Photocatalystmentioning

confidence: 99%

“…Recently, considerable efforts have been shifted to the construction of hierarchical architectures based on the 1D TNA nanostructure templates. For example, a simple hydrothermal treatment was adopted to reduce the heat treatment temperature for the construction of anatase TiO 2 nanostructure due to a dissolutionrecrystallization transformation of amorphous anodic TNAs, and the resultant hierarchical TiO 2 structures decorated with TiO 2 nanoparticles possess a higher surface area than that of smooth TNAs, which showed enhanced photocatalytic performance [103]. Compared to the heteroelement doping (e.g., N, F, and C) of TNAs, very recently, in situ self-doping with homospecies (e.g., Ti 3+ , and H + ) by an electrochemical reduction treatment has been emerging as a rational solution to enhance TiO 2 photoactivity within both UV and visible light regions [105].…”

Section: Photocatalystmentioning

confidence: 99%

Fabrication, Modification, and Emerging Applications of TiO₂Nanotube Arrays by Electrochemical Synthesis: A Review

Huang

Zhang

Lai

2013

International Journal of Photoenergy

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Titania nanotube arrays (TNAs) as a hot nanomaterial have a unique highly ordered array structure and good mechanical and chemical stability, as well as excellent anticorrosion, biocompatible, and photocatalytic performance. It has been fabricated by a facile electrochemical anodization in electrolytes containing small amounts of fluoric ions. In combination with our research work, we review the recent progress of the new research achievements of TNAs on the preparation processes, forming mechanism, and modification. In addition, we will review the potential and significant applications in the photocatalytic degradation of pollutants, solar cells, water splitting, and other aspects. Finally, the existing problems and further prospects of this renascent and rapidly developing field are also briefly addressed and discussed.

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“…HWT does not need pre-treatments such as acid etching or oxidation agents, and it's use of aqueous solutions minimizes any potential hazardous effects of the process [24,34,38,[41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Special wettable nanostructured copper mesh achieved by a facile hot water treatment process

Saadi

Hassan

Brozak

et al. 2017

Mater. Res. Express

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ABSTRACT:In this research, special wettable copper mesh owing superhydrophobicity and superoleophilicity property is reported using a low-cost, eco-friendly, rapid, and scalable synthesis methods. Hot water treatment (HWT) method is used to integrate the micro-textured copper mesh surface with a nanoscale roughness to achieve hierarchical micro-nano structured surface. The surface energy of the nanoscale In addition, the effect of the mesh's geometry on the wetting property was examined through correlations between wire diameter, pore size, and optimal values for the highest water CA.

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Low-temperature crystallization of TiO2 nanotube arrays via hot water treatment and their photocatalytic properties under visible-light irradiation

Cited by 37 publications

References 62 publications

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Fabrication, Modification, and Emerging Applications of TiO₂Nanotube Arrays by Electrochemical Synthesis: A Review

Special wettable nanostructured copper mesh achieved by a facile hot water treatment process

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Low-temperature crystallization of TiO2 nanotube arrays via hot water treatment and their photocatalytic properties under visible-light irradiation

Cited by 37 publications

References 62 publications

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Fabrication, Modification, and Emerging Applications of TiO2Nanotube Arrays by Electrochemical Synthesis: A Review

Special wettable nanostructured copper mesh achieved by a facile hot water treatment process

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Fabrication, Modification, and Emerging Applications of TiO₂Nanotube Arrays by Electrochemical Synthesis: A Review