Formation of hierarchical TiO2 nanoporous structure from free-standing TiO2 nanotubes layers

Ali, Ghafar; Yoo, Seung Hwa; Kum, Jong Min; Raza, Hamid Saeed; Chen, Deliang; Cho, Sung Oh

doi:10.1007/s11051-012-1047-6

Cited by 7 publications

(7 citation statements)

References 37 publications

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“…A complete change in the morphology from ZrO 2 nanotubes to nodular nanostructure was reported by Lee et al [ 29 ] after the elimination of the F species from anodic ZrO 2 nanotubes by heat treatment. Similarly, the removal of F species from anodic TiO 2 nanotubes leads to the formation of truncated [ 30 , 31 ] and concatenated TiO 2 nanoparticles after annealing process [ 32 , 33 ]. F species usually remained trapped in the anodic metal oxide nanotubes layer during anodization in F-containing electrolytes which can be easily removed by heat treatment [ 29 , 32 - 35 ].…”

Section: Resultsmentioning

confidence: 99%

Formation of self-organized Zircaloy-4 oxide nanotubes in organic viscous electrolyte via anodization

et al. 2014

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This work reports the formation of self-organized Zircaloy-4 (Zr-4) oxide nanotubes in viscous organic ethylene glycol (EG) electrolyte containing a small amount of fluoride salt and deionized (DI) water via an electrochemical anodization. The structure, morphology, and composition of the Zr-4 oxide nanotubes were studied using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), EDX, and XPS. SEM results showed that the length of the nanotubes is approximately 13 μm, and TEM results showed that the inner diameter of the Zr-4 oxide nanotubes is approximately 20 nm with average wall thickness of approximately 7 nm. XRD and selected area electron diffraction pattern (SAED) results confirmed that the as-anodized Zr-4 oxide nanotubes have cubic crystalline structure. Both cubic and monoclinic phases were found after annealing of Zr-4 oxide nanotubes. The tubular structure morphology of Zr-4 oxide nanotubes did not remain intact after annealing which is attributed to the elimination of F species from the annealed nanotubes.

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Section: Resultsmentioning

confidence: 99%

Formation of self-organized Zircaloy-4 oxide nanotubes in organic viscous electrolyte via anodization

et al. 2014

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“…These types of structures show utmost light harvesting due to maximum and efficient scattering (hence absorption) of incident light within [40]. Hierarchical TiO 2 nanostructures provide a significant improvement in properties due to enhanced porosity [54,55] and many devices can be optimized using HNSs [43]. Hierarchical morphology can enhance the photon absorption capability [8] as compared to spherical nanoparticle as there is increased absorption of light due to scattering.…”

Section: Hierarchical Nanostructuresmentioning

confidence: 99%

“…Titania nanostructures can be synthesized using various techniques. Some of them are hydrothermal [26,[29][30][31][32][33][34], solvothermal methods [10,11,35], sol-gel synthesis [1,15,36], microwave irradiation [8,24,37,38], physical and chemical vapor deposition [4,32,39], electrochemical methods [40,41] and anodization [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

“…Generally, anatase Titania shows superior properties to rutile Titania because of slow recombination of electron-hole pairs and higher potential energy of photogenerated electrons [45]. Nano-Titania exists in many forms like nanoparticles [15,[40][41][42], nanorods [10,24,46], nanowires [3,31,32,47], nanotubes [43,48], nanospheres [49], nanoflowers [8,32,46,50], nanoforests [44,50], etc. as shown in Figure 3.…”

Section: Introductionmentioning

confidence: 99%

“…(a) SEM images of hierarchical TiO 2 prepared via anodization of TNT in F-residue and (b) cross-sectional view[43].Hierarchical Nanostructures of Titanium Dioxide: Synthesis and Applications http://dx.doi.org/10.5772/intechopen.74525…”

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Hierarchical Nanostructures of Titanium Dioxide: Synthesis and Applications

Khan¹,

Javed²,

Islam³

2018

Titanium Dioxide - Material for a Sustainable Environment

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This chapter covers different routes of preparation of hierarchical nanostructures (HNS) of titanium dioxide. Keeping the interest in developing modern and sustainable methods of materials chemistry, this chapter focuses on synthesis routes for TiO 2 HNSs reported by researchers from all over the world. The chapter includes the details of chemical reactions taking place during the synthesis and the effects of various process parameters like: type of surfactants, organic/inorganic titanium salts, temperature and pressure on products. The obtained TiO 2 HNSs from different synthesis routes are subsequently compared in terms of their morphology, crystallite size, surface area, particle size and phase. The merits and demerits of all synthesis techniques are also added for comprehensive information. At the end, various applications of HNSs are discussed and their performance is analyzed with respect to the morphologies obtained from different synthesis techniques.

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Effect of electrochemical reduction on the structural and electrical properties of anodic TiO 2 nanotubes

Rasheed

Ahmad

Khaliq

et al. 2018

Current Applied Physics

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Formation of hierarchical TiO2 nanoporous structure from free-standing TiO2 nanotubes layers

Cited by 7 publications

References 37 publications

Formation of self-organized Zircaloy-4 oxide nanotubes in organic viscous electrolyte via anodization

Formation of self-organized Zircaloy-4 oxide nanotubes in organic viscous electrolyte via anodization

Hierarchical Nanostructures of Titanium Dioxide: Synthesis and Applications

Effect of electrochemical reduction on the structural and electrical properties of anodic TiO 2 nanotubes

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