Topic
Titanium ethoxide
About: Titanium ethoxide is a research topic. Over the lifetime, 123 publications have been published within this topic receiving 2853 citations. The topic is also known as: titanium ethoxide.
Papers published on a yearly basis
Papers
TL;DR: In this paper, carbon nanotubes (CNTs) with TiO 2 at the nano-scale level can promote the separation of the electron-hole charges generated upon irradiation.
Abstract: Combining carbon nanotubes (CNTs) with TiO 2 at the nano-scale level can promote the separation of the electron–hole charges generated upon irradiation. However, charge separation capability depends on the quality of the interfacial contact between CNTs and TiO 2 , and on the morphological and surface properties of the nanocomposites. In this study, CNT/TiO 2 nanocomposites with tailored uniform core–shell coatings were fabricated from different titania precursors (titanium ethoxide (TEOTi), titanium isopropoxide (TTIP) and titanium butoxide (TBT)) by surfactant wrapping sol–gel method. This method produces a uniform and well-defined nanometer-scale anatase titania (TiO 2 ) layer on individual CNT (multi-walled), producing a mesoporous nanocomposite film. The composites were characterized by a range of analytical techniques including TEM, XRD, BET, TGA and UV–vis to reveal the textural, crystallographic and optical properties of the composites. The nanocomposites produced from the different Ti precursors exhibited significant differences in photocatalytic activity and photocurrent within the experimental range. A thinner TiO 2 layer provides shorter distance for electron transfer to the CNT core enhancing photocatalytic activity (degradation of methylene blue). However, higher CNT content in the composites correlates with higher photocurrents. It is shown that TiO 2 film thickness is the key factor controlling electron transfer and photocatalytic activity in CNT/TiO 2 nanocomposites with a core–shell structure, when the catalyst is applied in an irradiated slurry suspension. However, it is the electronic conductivity of the nanocomposite catalyst film, which increases with CNT content that controls the rate of electron removal from the photocatalyst when it is subject to an external positive bias in an appropriate photo-electrochemical cell. Overall, the CNT/TiO 2 composite prepared from TBT performed significantly better than those prepared from TEOTi and TTIP.
209 citations
TL;DR: Tungsten doped titanium dioxide films with both transparent conducting oxide (TCO) and photocatalytic properties were produced via aerosol-assisted chemical vapor deposition of titanium ethoxide and dopant concentrations of tungsten ethoxide at 500 °C from a toluene solution, with good n-type electrical conductivities as determined via Hall effect measurements.
Abstract: Tungsten doped titanium dioxide films with both transparent conducting oxide (TCO) and photocatalytic properties were produced via aerosol-assisted chemical vapor deposition of titanium ethoxide and dopant concentrations of tungsten ethoxide at 500 °C from a toluene solution. The films were anatase TiO2, with good n-type electrical conductivities as determined via Hall effect measurements. The film doped with 2.25 at.% W showed the lowest resistivity at 0.034 Ω.cm and respectable charge carrier mobility (14.9 cm3/V.s) and concentration (×1019 cm−3). XPS indicated the presence of both W6+ and W4+ in the TiO2 matrix, with the substitutional doping of W4+ inducing an expansion of the anatase unit cell as determined by XRD. The films also showed good photocatalytic activity under UV-light illumination, with degradation of resazurin redox dye at a higher rate than with undoped TiO2.
150 citations
TL;DR: The complex of titanium ethoxide and an acyclic dipeptide ester whose terminal amino group is modified to a salicylal-type Schiff base catalyzes the asymmetric addition of hydrogen cyanide to aldehydes with high enantioselectivity as discussed by the authors.
Abstract: The complex of titanium ethoxide and an acyclic dipeptide ester whose terminal amino group is modified to a salicylal-type Schiff base catalyzes the asymmetric addition of hydrogen cyanide to aldehydes with high enantioselectivity. In the reaction of benzaldehyde and hydrogen cyanide, (R)-mandelonitrile is obtained with an enantiomeric excess of 90% when N-((2-hydroxy-1-naphthyl)methylene)-(S)-valyl-(S)-tryptophan methyl esteris employed
139 citations
TL;DR: In this paper, hollow titania microspheres were synthesized using surfactant-stabilized non-aqueous emulsion droplets, ranging from 100 nm to a few micrometres in diameter.
Abstract: Hollow titania microspheres ranging from 100 nm to a few micrometres in diameter were synthesized by a novel method using surfactant-stabilized non-aqueous emulsion droplets. Well-defined micron-sized hollow spheres with amorphous titania walls typically 50 nm thick were prepared by addition of water to formamide dispersions of hexadecane droplets containing titanium ethoxide. In contrast, addition of titanium ethoxide to formamide–water droplets dispersed in hexadecane produced hollow spheres of amorphous titania only 100 nm in diameter. In both cases, hydrolysis/condensation reactions at the formamide/oil interface gave rise to intact shells that could have uses as low density pigments, dyes, self-repairing coatings, photoactive storage/release agents, as well as compartmentalized structures in nanotechnology.
130 citations
TL;DR: Accelerated photodegradation of methylene blue over three-dimensionally ordered macroporous (3DOM) titania (pore sizes) is demonstrated and deposition of gold on the 3DOM titania surfaces decreased the reaction rate by covering the surface active sites.
Abstract: Accelerated photodegradation of methylene blue (MB) over three-dimensionally ordered macroporous (3DOM) titania (pore sizes: 0.5 and 1 μm) is demonstrated. The catalysts were synthesized by colloidal crystal templating against polystyrene spheres using a metal alkoxide precursor. The 3DOM titania walls which are predominantly anatase (>98%) were decorated homogeneously with gold nanoparticles (5−7 nm) by pH-controlled precipitation of Au from HAuCl4 using sodium hydroxide. A combination of powder X-ray diffraction (XRD), analytical transmission electron microscopy (ATEM) and X-ray photoelectron spectroscopy (XPS) confirmed the deposition of Au(0) on the 3DOM titania macroporous walls. Photocatalytic activity was monitored by following the degradation of MB with activity benchmarked against commercial P25 (Degussa) and powder titania prepared by hydrolysis of titanium ethoxide. Macroporous 3DOM titania with pore diameter 0.5 μm had the highest first-order rate constant of 0.042 min-1 for decomposition of ...
129 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 2 |
| 2018 | 1 |
| 2017 | 4 |
| 2016 | 2 |
| 2015 | 8 |
| 2014 | 5 |