Microstructure and formation mechanism of titanium dioxide nanotubes

Wang, Y.Q.; Hu, Guiqing; Duan, XF; Sun, Hai-Lun; Xue, Qi‐Kun

doi:10.1016/s0009-2614(02)01502-6

Cited by 280 publications

(94 citation statements)

References 16 publications

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“…Lin [12] reported that TiO 2 powders used as the provider of raw material were corroded by strong acid, and the formation mechanism of nanotubes were in a dissolutionprecipitation-growing procedure. However, Wang et al [13] and T. Kasuga et al [14] discussed that during treatment with NaOH solution, some Ti-O bonds of the TiO 2 precursor were broken, leading to the formation of lamellar fragments that were the intermediate phase in the formation process of the nanotubes material. The tubular structure was achieved by rolling slowly after the acidic post-treatment process, and therefore the acid rinsing step had become very important during the TiO 2 nanotubes formation process.…”

Section: B Characterization Of Titanium Dioxide Nanotubementioning

confidence: 99%

Study on the Preparation of Nanosized Titanium Dioxide with Tubular Structure by Hydrothermal Method and Their Photocatalytic Activity

Zeng¹,

Liu²,

Lu³

et al. 2014

IJCEA

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Abstract-In this study, we attempt to synthesize nanosized titanium dioxide with tubular structure for the photocatalytic applications, and self-prepared anatase TiO 2 powder is the precursor. We demonstrated that nanosized TiO 2 with tubular structure could be synthesized with a NaOH hydrothermal treatment on TiO 2 powder and then with a subsequent acid washing. Furthermore different formation mechanism of nanotubes could be got by controlling the pH value of acid washing step. In this research, we investigate the influence of different pH values of acid washing on the crystalline-structure, optical absorption range, porosity, specific surface area, and photo-catalytic activity of nanotubes. The influence of the preparation methods on crystalline-structure of photocatalysts and activities of photocatalytic reaction are obvious. The experimental results show that anatase TiO 2 nanotubes are produced as the pH value of acid washing is decreased to 1.3. Under this condition, the outer diameter and length of the nanotube is about 10 nm and 1μm respectively, its group is like petals. And it possesses the largest surface area of 381.2 m 2 /g, band gap of 3.12eV and the best photocatalytic activity.Index Terms-Anatase, hydrothermal method, photocatalytic activity, titanium dioxide nanotube.

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Section: B Characterization Of Titanium Dioxide Nanotubementioning

confidence: 99%

Study on the Preparation of Nanosized Titanium Dioxide with Tubular Structure by Hydrothermal Method and Their Photocatalytic Activity

Zeng¹,

Liu²,

Lu³

et al. 2014

IJCEA

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“…One of the most important and unique properties of TiO2 1-D is that the transfer of electron and holes in semiconducting materials is mainly governed by the quantum confinement phenomenon and transport characteristics related to photons and photons are largely affected by the size and geometrical building of the materials [2,5]. Besides that, modification of nanostructure TiO2 into 1-D is able to provide increase surface area of TiO2 [1].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photovoltaic Performance by Surface Modification of TiO₂ Nanorods with Aminopropyltrimethoxysilane (APTMS)

Fadillah

Wahyuningsih

Ramelan

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Modification of TiO2 nanorods through the addition of aminopropyltrimethoxysilane (APTMS) for enhancement of efficiency of solar cells has been studied. Synthesis of TiO2 nanorods was conducted through two major stages of mechanochemical and hydrothermal refluxing at a temperature of 120 o C for 24 hours on various concentration of NaOH. Material characterizations were performed by X-Ray Diffraction (XRD), Fourrier Transform Infrared (FTIR) and Transmission Electron Microscope (TEM). Mechanochemical treatment by ball milling showed that the TiO2 phase changed from anatase into brookite and it decreased of TiO2 crystals size. Morphology transformation of TiO2 to form TiO2 nanorods was showed by rod-shaped from TEM micrographs which are characteristic of the nanorods. FTIR spectra confirmed that amine group of aminopropyltrimethoxysilane (APTMS) were successfully grafted onto the TiO2 nanorods surface. Sensitization of TiO2 used Ruthenium complexes N3 (N3=cis-bis(isothiocyanato) bis(2,2'-bipyridyl-4,4'-dicarboxylato ruthenium (II)) were able to increase the uptake of TiO2 material to the visible region due to the absorption of visible light by N3 complex -APTMS. Sensitized TiO2 nanorods were prepared for Dye Sensitized Solar Cell (DSSCs) photoanode.The maximum results of the DSSCs (Dye Sensitized Solar Cell) performance was showed that TiO2 material modified by 10 % (v/v) APTMS capable increase efficiency of DSSCs.

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“…In order to improve various functions of TiO 2 powder viz phase, size and morphology, the various factors have been extensively studied. Since the innovative work by Kasuga et al in 1998-99 [1,2], TiO 2 -derived one-dimensional (1-D) nanomaterials synthesized by the hydrothermal alkali treatment method, such as nanotubes [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], nanowires [21][22][23][24][25], and nanofibers [26][27][28], have attracted much attention because of their unique microstructure and promising energy-related applications.e.g., lithium ion batteries [23,24,29], hydrogen storage [30,31], and dye-sensitized solar cells (DSCs) [32].…”

Section: Introductionmentioning

confidence: 99%

Partially nanowire-structured TiO2 electrode for dye-sensitized solar cells

2006

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Partially nanowire-structured TiO 2 was prepared by a hydrothermal processing followed by calcination in air. The hydrogen titanate powder as-synthesized was calcined at 300• C for 4 h to obtain the partially nanowire-structured TiO 2 . A dye-sensitized solar cell (DSC) with a film thickness of 5.6 μm, fabricated using the partially nanowire-structured TiO 2 showed better performance than using a fully nanowire-structured TiO 2 or a conventional equi-axed TiO 2 nanopowder. The short-circuit current density (J SC ), the open-circuit voltage (V OC ), the fill factor (FF) and the overall efficiency (η) are 11.9 mA/cm 2 , 0.754 V, 0.673 and 6.01 %, respectively. The effects of one-dimensional nanostructure and electron expressway concept are discussed.

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Microstructure and formation mechanism of titanium dioxide nanotubes

Cited by 280 publications

References 16 publications

Study on the Preparation of Nanosized Titanium Dioxide with Tubular Structure by Hydrothermal Method and Their Photocatalytic Activity

Study on the Preparation of Nanosized Titanium Dioxide with Tubular Structure by Hydrothermal Method and Their Photocatalytic Activity

Enhanced Photovoltaic Performance by Surface Modification of TiO₂ Nanorods with Aminopropyltrimethoxysilane (APTMS)

Partially nanowire-structured TiO2 electrode for dye-sensitized solar cells

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Microstructure and formation mechanism of titanium dioxide nanotubes

Cited by 280 publications

References 16 publications

Study on the Preparation of Nanosized Titanium Dioxide with Tubular Structure by Hydrothermal Method and Their Photocatalytic Activity

Study on the Preparation of Nanosized Titanium Dioxide with Tubular Structure by Hydrothermal Method and Their Photocatalytic Activity

Enhanced Photovoltaic Performance by Surface Modification of TiO2 Nanorods with Aminopropyltrimethoxysilane (APTMS)

Partially nanowire-structured TiO2 electrode for dye-sensitized solar cells

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Enhanced Photovoltaic Performance by Surface Modification of TiO₂ Nanorods with Aminopropyltrimethoxysilane (APTMS)