Photocatalytic generation of multiple ROS types using low-temperature crystallized anodic TiO2 nanotube arrays

Liao, Yulong; Brame, Jonathon; Que, Wenxiu; Xiu, Zongming; Xie, Haixia; Li, Qilin; Fabián, Marián; Alvarez, Pedro J. J.

doi:10.1016/j.jhazmat.2013.05.047

Cited by 46 publications

(28 citation statements)

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“…And the photocatalytic activity in visible light range of our as-synthesized heterojunction was confirmed by the MO degradation results. Our previous study found that the Degussa P25 had similar ultraviolet photocatalytic activities with TiO 2 NTAs, when the power P25 was placed on a glass substrate [ 28 ]. It can be concluded that we have successfully prepared Cu 2 O-TiO 2 NTA heterojunction films with visible-light photocatalytic activities.…”

Section: Resultsmentioning

confidence: 99%

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A Facile Method for Preparation of Cu2O-TiO2 NTA Heterojunction with Visible-Photocatalytic Activity

et al. 2018

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Based on highly ordered TiO2 nanotube arrays (NTAs), we successfully fabricated the Cu2O-TiO2 NTA heterojunction by a simple thermal decomposition process for the first time. The anodic TiO2 NTAs were functioned as both “nano-container” and “nano-reactors” to load and synthesize the narrow band Cu2O nanoparticles. The loaded Cu2O expanded absorption spectrum of the TiO2 NTAs from ultraviolent range to visible light range. We found that the Cu2O-TiO2 NTA heterojunction films had visible activity towards photocatalytic degrading methyl orange (MO). The photocatalytic abilities of the Cu2O-TiO2 NTA heterojunction films were found increased with the Cu2O content from 0.05 to 0.3 mol/L. This could be explained by more electron-hole pairs generated and less recombination, when the Cu2O-TiO2 heterojunction got formed. Here, we put forward this promising method, hoping it can facilitate the mass production and applications of Cu2O-TiO2 NTA heterojunction.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2637-8) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

“…However, due to the relatively wide gaps (~ 3.2 eV). TiO 2 NT photocatalyst is only active under UV irradiation [ 25 – 28 ]. In fact, a photocatalyst that is able to respond with visible light will surely take obvious advantages.…”

Section: Introductionmentioning

confidence: 99%

A Facile Method for Preparation of Cu2O-TiO2 NTA Heterojunction with Visible-Photocatalytic Activity

et al. 2018

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“…The photogenerated electrons are so active that they react with O 2 dissolved in water to generate superoxide Á O À 2 , while holes can react with OHor water to generate Á OH. These energetic species known as reactive oxygen species (ROS) can further react to form singlet oxygen 1 O 2 [26,27]. Therefore, the TiO 2 surface does not need to be directly in contact with MB dye molecules to photodegrade them under visible light.…”

Section: Resultsmentioning

confidence: 99%

TiO2/polypyrrole nanocomposites photoactive under visible light synthesized by heterophase polymerization in the presence of different surfactants

et al. 2014

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TiO 2 /polypyrrole nanocomposites were synthesized by batch (B) and semi-batch (SB) heterophase polymerization of pyrrole onto TiO 2 nanoparticles. Sodium bis-2-ethylhexyl sulfosuccinate (AOT), hexadecyltrimethylammonium bromide (CTAB), and sodium dodecyl sulfate (SDS) were used as surfactants while ammonium persulfate served as oxidizing agent. The resulting nanocomposites were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy, UV/Vis diffuse reflectance spectroscopy, Raman spectroscopy, and cyclic voltammetry. TiO 2 /polypyrrole nanoparticles were tested as photocatalysts Electronic supplementary material The online version of this article (under visible light in the degradation of methylene blue. Nanocomposites with conductivities between 4.85 9 10 -7 and 1.88 9 10 -2 S/cm were obtained. It was concluded that the polymerization mode and the surfactant type, used as a stabilizing agent, have a strong effect on the photocatalytic activity of the materials. The best results were obtained when SDS was used and polymerization carried out in SB mode. Percentage of photodegradation under visible light after 15 min was as follows: TiO 2 1.7 %, CTAB-SB 25.5 %, SDS-B 39.6 %, CTAB-B 57.5 %, AOT-SB 69.4 %, AOT-B 80.1 %, and SDS-SB 94.1 %; while under UV light irradiation after 60 min the percentages were: SDS-B 64 %, CTAB-SB 67 %, CTAB-B 69 %, TiO 2 71 %, AOT-SB 88.2 %, AOT-B 95.0 %, and SDS-SB 96.5 %.

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“…[1][2][3] As a semiconductor material, TiO 2 is a widely studied nano-material for many photoactive applications, like the effective photocatalysts. 4,5 It exhibits a good photocatalytic activity under ultraviolet irradiation, due to the band gap of ~ 3.2 eV (anatase) which ensures the absorption of UV illumination, [6][7][8][9] however, it shows no visible-light photocatalytic activity. To overcome this flaw and enhance its photoactivity, various materials are proposed to modify pure TiO 2 , includes nonmetal elements doping (N, C, S, etc), [10][11][12] metal particles decoration(Cu, Au, Ag, etc), [13][14][15][16] semiconductors coupling(NiO, Cu 2 O, Bi 2 O 3 , etc).…”

Section: Introductionmentioning

confidence: 99%

Hydrogen evolution promotion of Au‐nanoparticles‐decorated TiO₂ nanotube arrays prepared by dip‐loading approach

et al. 2019

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Au nanoparticle (NPs)@TiO2 nanotube arrays (NTAs) heterostructured films with enhanced H2 generation rate under full spectrum were synthesized, by using a controllable and facile dip‐loading approach. Size of the Au NPs was well‐distributed around 7 nm, and the TiO2 NTAs were found vertically aligned. Due to LSPR effect and Schottky contact, the as‐prepared Au NPs@TiO2 NTAs heterostructured films exhibited improved H2 generation abilities as well as photocatalytic degradation abilities. H2 evolution rate of the obtained samples (effective area: 5.25 cm2) reached 74.56 μmol/h, which was 38 times higher than that of the raw TiO2 NTAs. And the Au NPs@TiO2 NTAs samples also showed an obvious advantage over the raw TiO2 NTAs, in methyl orange degradation under UV illumination. Repetition experiments were further carried out to ensure the dip‐loading method was a reliable fabrication process, and the amount of Au particles attached on TiO2 tube walls could be manipulated by changing the dip‐loading cycle times.

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Photocatalytic generation of multiple ROS types using low-temperature crystallized anodic TiO2 nanotube arrays

Cited by 46 publications

References 73 publications

A Facile Method for Preparation of Cu2O-TiO2 NTA Heterojunction with Visible-Photocatalytic Activity

A Facile Method for Preparation of Cu2O-TiO2 NTA Heterojunction with Visible-Photocatalytic Activity

TiO2/polypyrrole nanocomposites photoactive under visible light synthesized by heterophase polymerization in the presence of different surfactants

Hydrogen evolution promotion of Au‐nanoparticles‐decorated TiO₂ nanotube arrays prepared by dip‐loading approach

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Photocatalytic generation of multiple ROS types using low-temperature crystallized anodic TiO2 nanotube arrays

Cited by 46 publications

References 73 publications

A Facile Method for Preparation of Cu2O-TiO2 NTA Heterojunction with Visible-Photocatalytic Activity

A Facile Method for Preparation of Cu2O-TiO2 NTA Heterojunction with Visible-Photocatalytic Activity

TiO2/polypyrrole nanocomposites photoactive under visible light synthesized by heterophase polymerization in the presence of different surfactants

Hydrogen evolution promotion of Au‐nanoparticles‐decorated TiO2 nanotube arrays prepared by dip‐loading approach

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Hydrogen evolution promotion of Au‐nanoparticles‐decorated TiO₂ nanotube arrays prepared by dip‐loading approach