Understanding the effect of morphology on the photocatalytic activity of TiO2 nanotube array electrodes

Adán, Cristina; Marugán, Javier; Sánchez, E.; Pablos, Cristina; Grieken, Rafael van

doi:10.1016/j.electacta.2016.01.088

Cited by 115 publications

(48 citation statements)

References 45 publications

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“…We considered only (0, m ) because it is reported to realize less strain compared to ( n , 0) under the same radius 15,24 . To make sure whether our nanotube structure could describe realistic samples to some extent, we examined the dependence of the calculated properties on m 29 , as tabulated in Table 2. All the computational details are given in Sec.…”

Section: Resultsmentioning

confidence: 99%

Bandgap reduction of photocatalytic TiO2 nanotube by Cu doping

Gharaei

Abbasnejad

Maezono

2018

Sci Rep

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We performed the electronic structure calculations of Cu-doped TiO2 nanotubes by using density functional theory aided by the Hubbard correction (DFT + U). Relative positions of the sub-bands due to the dopants in the band diagram are examined to see if they are properly located within the redox interval. The doping is found to tune the material to be a possible candidate for the photocatalyst by making the bandgap accommodated within the visible and infrared range of the solar spectrum. Among several possibilities of the dopant positions, we found that only the case with the dopant located at the center of nanotube seems preventing from electron-hole recombinations to achieve desired photocatalytic activity with n-type behavior.

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Section: Resultsmentioning

confidence: 99%

Bandgap reduction of photocatalytic TiO2 nanotube by Cu doping

Gharaei

Abbasnejad

Maezono

2018

Sci Rep

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“…The efficiency of TiO 2 and its surface reactions are limited by several factors such as its surface morphology, crystalline structure and surface area to size ratio . Scientists have focused on the synthesis of TiO 2 with new features and functionalities that make it suitable for green environmental applications such as the effective control of plant diseases.…”

Section: Introductionmentioning

confidence: 99%

Antiviral activity of titanium dioxide nanostructures as a control strategy for broad bean strain virus in faba bean

Elsharkawy

Derbalah

2018

Pest Management Science

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“…Although this technique has various advantages, some issues could occur in terms of the reproducibility of the prepared samples. It has been reported that the photocatalytic performance of TiO 2 NTs strongly depends on its surface morphology [22]. The surface morphology of TiO 2 NTs are controlled by various experimental parameters such as anodization duration, anodization potential, and electrolyte composition [13].…”

Section: Introductionmentioning

confidence: 99%

Visible Light Photodegradation of Formaldehyde over TiO2 Nanotubes Synthesized via Electrochemical Anodization of Titanium Foil

et al. 2020

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In this study, a series of TiO2 nanotubes (NTs) were synthesized employing electrochemical anodization of titanium foil in an ionic liquid solution containing a mixture of glycerol and choline chloride, acting as electrolyte. The as-synthesized TiO2 NTs were calcined at 350, 450, or 550 °C for a 2 h duration to investigate the influence of calcination temperature on NTs formation, morphology, surface properties, crystallinity, and subsequent photocatalytic activity for visible light photodegradation of gaseous formaldehyde (HCHO). Results showed that the calcination temperature has a significant effect on the structure and coverage of TiO2 NTs on the surface. Freshly synthesized TiO2 NTs showed better-ordered structure compared to calcined samples. There was significant pore rupture with increasing calcination temperature. The transformation from anatase to rutile phase appeared after calcination at 450 °C and the weight fraction of the rutile phase increased from 19% to 36% upon increasing the calcination temperature to 550 °C. The band gaps of the TiO2 NTs were in the range from 2.80 to 2.74 eV, shifting the active region of the materials to visible light. The presence of mixed anatase–rutile TiO2 phases in the sample calcined at 450 °C showed enhanced photoactivity, which was confirmed by the 21.56 mg∙L−1∙g−1 removal of gaseous formaldehyde under 120 min of visible light irradiation and displayed enhanced quantum yield, ∅HCHO of 17%.

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Understanding the effect of morphology on the photocatalytic activity of TiO2 nanotube array electrodes

Cited by 115 publications

References 45 publications

Bandgap reduction of photocatalytic TiO2 nanotube by Cu doping

Bandgap reduction of photocatalytic TiO2 nanotube by Cu doping

Antiviral activity of titanium dioxide nanostructures as a control strategy for broad bean strain virus in faba bean

Visible Light Photodegradation of Formaldehyde over TiO2 Nanotubes Synthesized via Electrochemical Anodization of Titanium Foil

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