Study on photocatalysis of TiO 2 nanotubes prepared by methanol-thermal synthesis at low temperature

Nam, Chau Thanh; Yang, Wein-Duo; Đức, Lê Minh

doi:10.1007/s12034-013-0546-0

Cited by 27 publications

(17 citation statements)

References 30 publications

(34 reference statements)

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“…However, it can be observed that calcination slightly increased the photocatalytic activity of titanate nanotubes. Nam et al (2013) also reported slightly faster degradation of methylene blue in the presence of calcined titania nanotubes and attribute this increase of degradation rate to the appearance of low amount of anatase phase. We believe that increased photocatalytic activity of calcined nanotubes is a consequence of both, the presence of anatase, i.e.…”

Section: Resultsmentioning

confidence: 86%

Adsorption and Degradation Kinetics of Methylene Blue on As-prepared and Calcined Titanate Nanotubes

Kurajica¹,

Minga²,

Blažic³

et al. 2018

AJS

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Titanate nanotubes were prepared by hydrothermal synthesis, followed by Titanate nanotubes were prepared by hydrothermal synthesis, followed by proton exchange, and calcined at 250°C for 2h. The properties of prepared nanotubes were investigated with field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), adsorption-desorption N 2 isotherms and UV-Vis diffuse reflectance spectroscopy (DRS). As-prepared sample displayed strongly aggregated nanotubes with crystal structure of H 2 Ti 2 O 5 ×H 2 O. Calcination yielded with loss of interlayer water and partial transformation of nanotubes to anatase phase. Adsorption and photocatalytic decomposition of methylene blue, used as a model pollutant, on as-prepared and calcined titanate nanotubes have been studied. It was established that calcination at 250°C for 2h improves the adsorption and photocatalytic properties of titanate nanotubes. It was shown that pseudo-second-order model was the most appropriate to describe adsorption of methylene blue on titanate nanotubes. Affinity toward methylene blue of 48.45mg g-1 and 95.24mg g-1 has been established for as-prepared and calcined titanate nanotubes, while equilibrium adsorption was attained in 120min. Adsorption process is controlled by intraparticle diffusion and surface sorption in both samples, but the contribution of surface sorption is greater for the calcined sample. The pseudo-first-order kinetic is an acceptable model for photocatalytic dye degradation process on titanate nanotubes. It was shown that the calcination slightly increased the photocatalytic activity of titanate nanotubes.

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Section: Resultsmentioning

confidence: 86%

Adsorption and Degradation Kinetics of Methylene Blue on As-prepared and Calcined Titanate Nanotubes

Kurajica¹,

Minga²,

Blažic³

et al. 2018

AJS

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“…Figure shows X‐ray diffraction patterns of the precursor (a) and the photocatalyst synthesized at 155°C before calcination (b) and after calcination at 700°C (c). In the diffraction pattern of the precursor (a), peaks at 2θ° of 25.42, 37.87, 48.12, and 75.12 are allocated to anatase …”

Section: Resultsmentioning

confidence: 99%

Investigating photocatalytic property of TiO₂ nanorods fabricated hydrothermally at equal molar ratio of KOH and NaOH

Naseri

Allahverdi

2018

Int J Applied Ceramic Tech

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TiO 2 photocatalysts were prepared by hydrothermal method at temperatures of 110, 155, and 200°C for 24 hours, using KOH (5 mol/L):NaOH (5 mol/L) solution and anatase TiO 2 powder with an average particle size of 0.13 μm as precursor and by calcining at two different temperatures of 450 and 700°C. An overall photocatalytic removal efficiency of 93% was achieved for Rhodamine B dye under UV light irradiation by the photocatalyst obtained at synthesis and calcination temperatures of 155 and 700°C, respectively, which indicated a nanorod morphology with a mean diameter of about 34 nm.

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“…The as-spun multi-component 6 nanostructure was stabilized and then carbonized to obtain a well-designed TiO 2 @ZnO carbon non-woven hollow nanofiber by burning PVP and transforming TBOT, ZnCl 2 and PAN to TiO 2 , ZnO and the graphite carbon, respectively. Subsequently, high porous TiO 2 brush-like nanotube arrays attached onto 3D graphite carbon hollow nanofibers obtained by employing the alkaline (10.0 M NaOH) hydrothermal process in a Teflon-lined stainless steel autoclave at 130 °C for 24 h with subsequent acid-washing and annealing treatment at 420 °C ( Figure S1) 31,[44][45] .…”

Section: Resultsmentioning

confidence: 99%

Triple Axial Coelectrospun Multifunctional Double-Shell TiO₂@ZnO Carbon Hollow Nanofibrous Mat Transformed to C-Attached TiO₂ Brush-Like Nanotube Arrays: An Mo⁶⁺ Adsorbent Nonwoven Mat

Shami

Sharifi-Sanjani

Khoee

et al. 2014

Ind. Eng. Chem. Res.

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A triple axial co-electrospinning procedure followed with a two-step heat treatment was successfully employed to fabricate continuous heterostructured multifunctional double-shell TiO 2 @ZnO graphite carbon non-woven hollow nanofibrous mats. The as-synthesized TiO 2 @ZnO/C hollow heterojunctions were transformed to 3D high surface area rutile TiO 2 brush-like nanotube arrays attached onto carbon tubular mats under the alkaline hydrothermal and ion exchange processes combined with the annealing. The obtained TiO 2 nanotubes have a typical inner diameter of about 3.5 nm, wall thickness of about 4.0 nm, and length up to several hundred nanometers. Mathematical models, as well as the experimental results exhibited a higher self-adsorption capacity of Mo 6+ pollutant over C-attached TiO 2 nanotubes can be attributed to the larger surface area, providing more active sites for a contact with the reactants and pollutants.Furthermore, the kinetic studies suggested that the pseudo-second-order model is suitable to describe the adsorption mechanism of Mo 6+ over the as-synthesized hollow nanostructures.

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Study on photocatalysis of TiO 2 nanotubes prepared by methanol-thermal synthesis at low temperature

Cited by 27 publications

References 30 publications

Adsorption and Degradation Kinetics of Methylene Blue on As-prepared and Calcined Titanate Nanotubes

Adsorption and Degradation Kinetics of Methylene Blue on As-prepared and Calcined Titanate Nanotubes

Investigating photocatalytic property of TiO₂ nanorods fabricated hydrothermally at equal molar ratio of KOH and NaOH

Triple Axial Coelectrospun Multifunctional Double-Shell TiO₂@ZnO Carbon Hollow Nanofibrous Mat Transformed to C-Attached TiO₂ Brush-Like Nanotube Arrays: An Mo⁶⁺ Adsorbent Nonwoven Mat

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Study on photocatalysis of TiO 2 nanotubes prepared by methanol-thermal synthesis at low temperature

Cited by 27 publications

References 30 publications

Adsorption and Degradation Kinetics of Methylene Blue on As-prepared and Calcined Titanate Nanotubes

Adsorption and Degradation Kinetics of Methylene Blue on As-prepared and Calcined Titanate Nanotubes

Investigating photocatalytic property of TiO2 nanorods fabricated hydrothermally at equal molar ratio of KOH and NaOH

Triple Axial Coelectrospun Multifunctional Double-Shell TiO2@ZnO Carbon Hollow Nanofibrous Mat Transformed to C-Attached TiO2 Brush-Like Nanotube Arrays: An Mo6+ Adsorbent Nonwoven Mat

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Product

Resources

About

Investigating photocatalytic property of TiO₂ nanorods fabricated hydrothermally at equal molar ratio of KOH and NaOH

Triple Axial Coelectrospun Multifunctional Double-Shell TiO₂@ZnO Carbon Hollow Nanofibrous Mat Transformed to C-Attached TiO₂ Brush-Like Nanotube Arrays: An Mo⁶⁺ Adsorbent Nonwoven Mat