Nonaqueous Sol–Gel Synthesis of Anatase Nanoparticles and Their Electrophoretic Deposition in Porous Alumina

Abstract

Titanium dioxide (TiO) nanoparticles were synthesized by nonaqueous sol-gel route using titanium tetrachloride and benzyl alcohol as the solvent. The obtained 4 nm-sized anatase nanocrystals were readily dispersible in various polar solvents allowing for simple preparation of colloidal dispersions in water, isopropyl alcohol, dimethyl sulfoxide, and ethanol. Results showed that dispersed nanoparticles have acidic properties and exhibit positive zeta-potential which is suitable for their deposition by cathodic electrophoresis. Aluminum substrates were anodized in phosphoric acid in order to produce porous anodic oxide layers with pores ranging from 160 to 320 nm. The resulting nanopores were then filled with TiO nanoparticles by electrophoretic deposition. The influence of the solvent, the electric field, and the morphological characteristics of the alumina layer (i.e., barrier layer and porosity) were studied.

The Bright X‐Ray Stimulated Luminescence of HfO2 Nanocrystals Activated by Ti Ions

“…All spectra were corrected with reference to adventitious aliphatic carbon taken at 285.0 eV. Nanocrystalline anatase (TiO 2 obtained by solvothermal sol–gel) and ALD (amorphous) HfO 2 were used as references.…”

Revisiting anodic alumina templates: from fabrication to applications

“…These membranes can be further used as templates, for micro-and nano-structuration of different materials highly demanded in the nanotechnology field. Several distinct morphologies from solid nanowires [26][27][28][29][30][31][32][33][34][35] , segmented nanowires of varying composition [36][37][38] or diameter 37,39 , hollowed tubular wires also referred to as nanotubes [40][41][42][43][44][45][46][47][48] , nanocones 49 , Y-branched wires [50][51][52][53][54][55][56] , to 3D networks of interconnected nanowires 26, 57-62 can be obtained by filling the previously generated porous structure. This can be achieved through different growth techniques such as electrochemical deposition, CVD, ADL, sputtering, among others.…”

Titanium-Anthraquinone Material as a New Design Approach for Electrodes in Aqueous Rechargeable Batteries

“…Titanium has been used as an alkaline flow battery electrolyte when coordinated with catechol [57]; the stability of these compounds under electrochemical cycling indicated that a solid analogue might be used in a solid-electrode battery. Titanium isopropoxide has been used to synthesize TiO 2 nanoparticles by sol-gel synthesis [58], and was chosen as a titanium source due to the formation of isopropanol as a side product, which would boil in the high-temperature reaction mixture. These papers influenced the synthesis in this work by implying that multiple quinones may coordinate to metals either as bidentate or monodentate ligands, and by using titanium as a stable metal center for solid metal-organic materials.…”