Effect of calcination temperature on morphology and photoelectrochemical properties of anodized titanium dioxide nanotube arrays

Wang, Yuanyuan; Wang, Bo

doi:10.1016/j.apcatb.2009.12.003

Cited by 401 publications

(238 citation statements)

References 54 publications

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“…All the three samples are annealed in air ambient at 450°C, before XRD measurement to form polycrystalline structures. Different phase crystallites like anatase, rutile and brokite are reported for TiO 2 films by previous groups [39,40]. As it can be seen XRD pattern of the samples grown at 35 and 45 V show mixed crystalline crystal phases of anatase and rutile with (210) and (212) planes.…”

Section: Resultsmentioning

confidence: 69%

“…Furthermore, increasing the anodizing voltage is caused to reduce roughness factor of sample. TiO 2 optical properties such as photoelectron chemical and photo catalysis are known to depend on their phase crystallites and moreover these are so important for their application [39,40]. XRD pattern of the TiO 2 nanotubes synthesized at various anodizing voltage are 35, 45 and 55 V are given in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Effects of various applied voltages on physical properties of TiO2 nanotubes by anodization method

et al. 2017

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Three steps anodization process is used to synthesize highly ordered and uniform multilayered titanium oxide (TiO 2 ) nanotubes and effect of different anodization voltages are studied on their physical properties such as structural, morphological and optical. The crystalized structure of the synthesized tubes is investigated by X-ray diffractometer analysis. To study the morphology of the tubes, field emission scanning electron microscopy is used, which showed that the wall thicknesses and the diameters of the tubes are affected by the different anodization voltages. Moreover, optical studies performed by diffuse reflection spectra suggested that band gap of the TiO 2 nanotubes are also changed by applying different anodization voltages. In this study using physical investigations, an optimum anodization voltage is obtained to synthesize the uniform crystalized TiO 2 nanotubes with suitable diameter, wall thickness and optical properties.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Effects of various applied voltages on physical properties of TiO2 nanotubes by anodization method

et al. 2017

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“…In this context, a dramatic change in the behavior in the range of temperatures 200 to 300 ∘ C is appreciated; around these temperatures, collapsing of the nanotube structure happens [16]. In addition, from a temperature of 25 ∘ C, a surface resonance plasmon at 450 nm corresponding to silver nanoparticles is observed; as the temperature increases, this band increases its intensity and moves to higher wavelengths.…”

Section: Uv-vis Spectroscopymentioning

confidence: 96%

H₂Ti₃O₇ Nanotubes Decorated with Silver Nanoparticles for Photocatalytic Degradation of Atenolol

Hinojosa-Reyes

Camposeco-Solís

Ruíz

et al. 2017

Journal of Nanomaterials

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The photocatalytic degradation/adsorption process of the -blocker atenolol (ATL) under UV irradiation is described using two types of silver decorated catalysts: silver/titania and silver/titanates. The silver ions were reduced on the surface of TiO 2 -P25-Degussa using gallic acid. Silver/titanates were prepared by a microwave-assisted hydrothermal method using the silver/titania as the starting material to obtain the hydrogen titanate (H 2 Ti 3 O 7 ) structure with tubular morphology. These materials were characterized by X-ray diffraction, UV-Vis spectroscopy, N 2 physisorption, temperature programmed reduction, TEM, and FTIR spectroscopy. During the photocatalytic process, the ATL molecules were completely converted to amino-diol byproducts. It is the first time that these materials have been applied during the photocatalytic process in the degradation of pharmaceuticals products. The success of the silver nanoparticles (2 nm) consists of the homogeneous distribution over the surface of titanate nanotubes inhibiting the hole/electron recombination promoting the oxidation process. The Ag@H 2 Ti 3 O 7 with a concentration of silver as 1.0% shows the highest adsorption/degradation of ATL than the Ag@TiO 2 and the P25-Degussa. The great performance in the reuse test consists in the strong attachment of the silver nanoparticles on the titanium surface that inhibits the silver lixiviation during the photocatalytic tests.

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“…Figure 1a). Figure 1b shows that the diffraction peak intensity strengthens and sharpens with increased temperature, indicating the crystallinity increases with increased temperature and time 24,25 . Moreover, the diffraction peak intensity ratios (I 004 /I 200 ) of the (004) and (200) crystal planes are calculated to be 0.7, 1.9, and 3.6 for the sample prepared at 70, 140, and 180 °C, respectively.…”

Section: Photocatalytic Experimentsmentioning

confidence: 99%

“…Subsequently, the mixed solution was adjusted to various pH value (1.73, 3.00, 5.00, 7.00, 9.00, and 11.00) with an ammonia solution or nitric acid solution. Then, the mixture was transferred into a Teflon-lined stainless steel autoclave and heated in the oven according to the setting time (1,4,8,12,16,20,24,36, and 48 h) and temperature (25, 50, 70, 80, 100, 140, and 180 o C). Unless otherwise stated, the reaction conditions of pH, temperature, and time are set at pH=5.00, 180 o C for 24 h. Finally, the resultant solid was separated by centrifugation and washed with deionized water and ethanol three times and then dried at 80 °C for 8 h in the air.…”

Section: Preparation Of Cdmoomentioning

confidence: 99%

CdMoO4 Micro-ellipsoids: Controllable Synthesis, Growth Mechanism, and Photocatalytic Activity

Liu

Gao

et al. 2016

Mat. Res.

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CdMoO 4 micro-ellipsoids were synthesized by a simple hydrothermal route with the assistance of nonionic surfactant Triton X-100 and characterized by X-ray diffraction, scanning electron microscopy and UV-Vis diffuse reflectance spectroscopy. The effects of hydrothermal pH, temperature, and time on the morphology and photocatalytic activity of CdMoO 4 were investigated. With an initial hydrothermal pH of 5.00, CdMoO 4 micro-ellipsoids were obtained at 180 °C for 24 h and found to possess the highest photocatalytic activity-89% Rhodamine B can be degraded for 30 minutes presented in the 0.4 g/L CdMoO 4 suspension. The formation mechanism of the CdMoO 4 micro-ellipsoids was initiated by the formation of small nanoparticles and bulk structures afterwards, which was followed by the growth of micro-ellipsoids. Experiment results showed that the evolution of the micro-ellipsoids was an Ostwald ripening process.

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Effect of calcination temperature on morphology and photoelectrochemical properties of anodized titanium dioxide nanotube arrays

Cited by 401 publications

References 54 publications

Effects of various applied voltages on physical properties of TiO2 nanotubes by anodization method

Effects of various applied voltages on physical properties of TiO2 nanotubes by anodization method

H₂Ti₃O₇ Nanotubes Decorated with Silver Nanoparticles for Photocatalytic Degradation of Atenolol

CdMoO4 Micro-ellipsoids: Controllable Synthesis, Growth Mechanism, and Photocatalytic Activity

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Effect of calcination temperature on morphology and photoelectrochemical properties of anodized titanium dioxide nanotube arrays

Cited by 401 publications

References 54 publications

Effects of various applied voltages on physical properties of TiO2 nanotubes by anodization method

Effects of various applied voltages on physical properties of TiO2 nanotubes by anodization method

H2Ti3O7 Nanotubes Decorated with Silver Nanoparticles for Photocatalytic Degradation of Atenolol

CdMoO4 Micro-ellipsoids: Controllable Synthesis, Growth Mechanism, and Photocatalytic Activity

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H₂Ti₃O₇ Nanotubes Decorated with Silver Nanoparticles for Photocatalytic Degradation of Atenolol