Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications

http://publicationslist.org/data/meng.chong/ref-18/sdarticle.pdf

Recent Developments in Photocatalytic Water Treatment Technology: A Review

A surface science perspective on TiO2 photocatalysis

Titania is one of the most widely used benchmark standard photocatalysts in the field of environmental applications. However, the large band gap of titania and massive recombination of photogenerated charge carriers limit its overall photocatalytic efficiency. The former can be overcome by modifying the electronic band structure of titania including various strategies like coupling with a narrow band gap semiconductor, metal ion/nonmetal ion doping, codoping with two or more foreign ions, surface sensitization by organic dyes or metal complexes, and noble metal deposition. The latter can be corrected by changing the surface properties of titania by fluorination or sulfation or by the addition of suitable electron acceptors besides molecular oxygen in the reaction medium. This review encompasses several advancements made in these aspects, and also some of the new physical insights related to the charge transfer events like charge carrier generation, trapping, detrapping, and their transfer to surface are d...

Review on Modified TiO2 Photocatalysis under UV/Visible Light: Selected Results and Related Mechanisms on Interfacial Charge Carrier Transfer Dynamics

Transparent conductors as solar energy materials: A panoramic review

A simple sol−gel route has been developed for the preparation of mesoporous and nanocrystalline anatase thin layers. An anatase hydrosol was first synthesized at room temperature from acidic hydrolysis of titanium isopropoxide. The optimization of the synthesis parameters, including titanium concentration, HCl/Ti and H2O/Ti ratios, temperature, and aging time, enabled us to produce a clear sol with a very low HCl/Ti ratio (equal to 1). As a function of the further thermal treatment conditions, it was then possible to control the size of the anatase crystallites (from 5 to >10 nm) and the O/Ti stoichiometry (from 1.9 to 2.0). Ordered mesoporosity was obtained by using a triblock copolymer as the templating agent. Preliminary experiments evidenced the photocatalytic activity of the prepared layers.

A Simple Route for Low-Temperature Synthesis of Mesoporous and Nanocrystalline Anatase Thin Films

Mesoporous anatase coatings for coupling membrane separation and photocatalyzed reactions

A previous paper described the low-temperature synthesis of mesoporous nanocrystalline anatase thin layers obtained by mesophase templating (Chem. Mater. 2003, 15, 2463). This work deals with the structural characterization of these anatase thin layers and with the extension of the synthesis method to films with a different mesostructure. Thus, two triblock copolymers are used as structuring agents and the effect of the volume fraction of surfactant in the dried layers is also considered. The determination of the mesostructures is mainly based on 2D X-ray diffraction experiments, completed with observations by transmission electron microscopy and atomic force microscopy. Nitrogen adsorption−desorption measurements are performed to investigate the porous texture of the thin layers.

Florence Bosc

Papers

A Simple Route for Low-Temperature Synthesis of Mesoporous and Nanocrystalline Anatase Thin Films

Mesoporous anatase coatings for coupling membrane separation and photocatalyzed reactions

Mesostructure of Anatase Thin Films Prepared by Mesophase Templating

Mesoporous TiO2-based photocatalysts for UV and visible light gas-phase toluene degradation

TiO2 anatase-based membranes with hierarchical porosity and photocatalytic properties