. Anpo, implantation ionique avec des métaux et des non-métaux, 2001.

. Dans-le-schéma-suivant-proposé-par-serponeackerman, les modifications induites par le dopage sont représentées La partie gauche représente une bande interdite non modifiée Sur la partie centrale, on peut voir que si le dopage est cationique, on a la formation de niveaux discrets proches de la bande de conduction, tandis que s'il est anionique, les niveaux sont proches de la bande de valence. Une vraie réduction du bandgap est obtenue lorsqu'il y a superposition des bandes idoines, La position et l'effet du dopage dépendent donc de la nature et de la quantité du dopant. References, 2001.

. Rolison, Synthesis of Ruthenium Dioxide-Titanium Dioxide Aerogels: Redistribution of Electrical Properties on the Nanoscale, Chem. Mater, vol.9, pp.1248-1255

. Rosseler, Solar light photocatalytic hydrogen production from water over Pt and Au/TiO2(anatase/rutile) photocatalysts: Influence of noble metal and porogen promotion, Journal of Catalysis, vol.269, issue.1, pp.179-190, 2010.
DOI : 10.1016/j.jcat.2009.11.006

. Rouquerol, Adsorption by powders and porous solids, 1999.

. Rouquerol, Texture des matériaux pulvrulents ou poreux, 2003.

. Sakthivel, Enhancement of photocatalytic activity by metal deposition: characterisation and photonic efficiency of Pt, Au and Pd deposited on TiO2 catalyst, Water Research, vol.38, issue.13, pp.3001-3008, 2004.
DOI : 10.1016/j.watres.2004.04.046

S. Sato, Photocatalytic activity of NOx-doped TiO2 in the visible light region, Chemical Physics Letters, vol.123, issue.1-2, pp.126-128, 1986.
DOI : 10.1016/0009-2614(86)87026-9

G. W. Scherer, Theory of Drying, Journal of the American Ceramic Society, vol.24, issue.9, pp.3-14, 1990.
DOI : 10.1063/1.338285

D. M. Schleicha and B. Walter, Formation of titania nanoparticles by vapor phase reactions of titanium tetraisopropoxide in oxygen/ozone containing atmospheres, Nanostructured Materials, vol.8, issue.5, pp.579-586, 1997.
DOI : 10.1016/S0965-9773(97)00191-8

. Sene, Thin-Film Electrode Materials, The Journal of Physical Chemistry B, vol.107, issue.7, pp.1597-1603, 2002.
DOI : 10.1021/jp026317y

N. Serpone-]-serpone, Narrowed by Anion- and Cation-Doping of Titanium Dioxide in Second-Generation Photocatalysts?, The Journal of Physical Chemistry B, vol.110, issue.48, pp.24287-24293, 2006.
DOI : 10.1021/jp065659r

. Shimoyama, Drying processes for preparation of titania aerogel using supercritical carbon dioxide. Chemical Engineering Research and Design, In press Structure of 255, 1997.

. Silipas, ??? based systems for photoelectrochemical generation of solar hydrogen, Processes in Isotopes and Molecules, Journal of Physics: Conference Series, pp.12055-154, 2009.
DOI : 10.1088/1742-6596/182/1/012055

. Silversmit, A fully oxidized V2O5/TiO2(001)-anatase system studied with in situ synchrotron photoelectron spectroscopy, anatase system studied with in situ synchrotron photoelectron spectroscopy, pp.179-186, 2005.
DOI : 10.1016/j.susc.2005.03.055

S. Simonsen, E. M. Simonsen, and E. G. Sogaard, Sol???gel reactions of titanium alkoxides and water: influence of pH and alkoxy group on cluster formation and properties of the resulting products, Journal of Sol-Gel Science and Technology, vol.32, issue.2, pp.485-497, 2010.
DOI : 10.1007/s10971-009-2121-0

K. S. Sing, Reporting physisorption data for gas/solid systems, with special reference to the determination of surface area and porosity Internationl union of pure and applied chemistry [So and ans SJ Moon Photo-production of hydrogen over the CdS-TiO 2 nano-composite particulate films treated with TiCl 4, International Journal of Hydrogen Energy, vol.29, pp.229-234, 1982.

Y. Sreethawong, T. Sreethawong, and S. Yoshikawa, Enhanced photocatalytic hydrogen evolution over Pt supported on mesoporous TiO2TiO2 prepared by single-step sol???gel process with surfactant template, International Journal of Hydrogen Energy, vol.31, issue.6, pp.786-796, 2006.
DOI : 10.1016/j.ijhydene.2005.06.015

. Sreethawong, Quantifying influence of operational parameters on photocatalytic H2 evolution over Pt-loaded nanocrystalline mesoporous TiO2 prepared by single-step sol???gel process with surfactant template, Journal of Power Sources, vol.165, issue.2, pp.861-869, 2007.
DOI : 10.1016/j.jpowsour.2006.12.050

. Suzuki, Non-equilibrium nitrogen dc-arc plasma treatment of TiO, 2008.
URL : https://hal.archives-ouvertes.fr/hal-00359177

. Takahashi, High resolution X-ray photoemission study of nitrogen doped TiO2 rutile single crystals, Chemical Physics Letters, vol.454, issue.4-6, pp.314-317, 2008.
DOI : 10.1016/j.cplett.2008.02.031

. Tewari, Ambient-temperature supercritical drying of transparent silica aerogels, Materials Letters, vol.3, issue.9-10, pp.363-367, 1985.
DOI : 10.1016/0167-577X(85)90077-1

T. Tsai, C. Tsai, and H. Teng, Regulation of the Physical Characteristics of Titania Nanotube Aggregates Synthesized from Hydrothermal Treatment, Chemistry of Materials, vol.16, issue.22, pp.4352-4358, 2004.
DOI : 10.1021/cm049643u

. Tokmakov, Urea and Urea Nitrate Decomposition Pathways: A Quantum Chemistry Study Thermal evolution of mesoporous titatania prepared by CO 2 supercritical extraction, Journal of Sol-Gel Science and Technology, vol.38, pp.5-12, 2006.

. Valentin, N-doped TiO2: Theory and experiment, Chemical Physics, vol.339, issue.1-3, pp.44-56, 2007.
DOI : 10.1016/j.chemphys.2007.07.020

. Valentin, Powders by EPR Spectroscopy and DFT Calculations, The Journal of Physical Chemistry B, vol.109, issue.23, pp.11414-11419, 2005.
DOI : 10.1021/jp051756t

. Vanveen, A method for the quantitative determination of the basic, acidic and total hydroxy content of TiO 2, Journal of the chemical society-chemical communications, vol.23, pp.1656-1658, 1985.

G. Varghese, O. K. Varghese, and C. A. Grimes, Appropriate strategies for determining the photoconversion efficiency of water photoelectrolysis cells: A review with examples using titania nanotube array photoanodes, Solar Energy Materials and Solar Cells, vol.92, issue.4, pp.374-384, 2008.
DOI : 10.1016/j.solmat.2007.11.006

. Varghese, and Water Vapor to Hydrocarbon Fuels, Nano Letters, vol.9, issue.2, pp.731-737, 2009.
DOI : 10.1021/nl803258p

. Vittadini, -B Surfaces: A Density Functional Study, The Journal of Physical Chemistry C, vol.113, issue.44, pp.18973-18977, 2009.
DOI : 10.1021/jp9073009

URL : https://hal.archives-ouvertes.fr/hal-00476026

. Wilke, . Breuer, K. Wilke, and H. Breuer, The influence of transition metal doping on the physical and photocatalytic properties of titania, Journal of Photochemistry and Photobiology A: Chemistry, vol.121, issue.1, pp.49-53, 1999.
DOI : 10.1016/S1010-6030(98)00452-3

S. Wright, J. Wright, and N. Sommerdijk, Sol-Gel Materials Chemistry and Applications, 2001.

C. Wu, J. C. Wu, and C. Chen, A visible-light response vanadium-doped titania nanocatalyst by sol???gel method, Journal of Photochemistry and Photobiology A: Chemistry, vol.163, issue.3, pp.509-515, 2004.
DOI : 10.1016/j.jphotochem.2004.02.007

L. Wu, N. Wu, and M. Lee, Enhanced TiO2 photocatalysis by Cu in hydrogen production from aqueous methanol solution, International Journal of Hydrogen Energy, vol.29, issue.15, pp.1601-1605, 2004.
DOI : 10.1016/j.ijhydene.2004.02.013

. Yamashita, thin film photocatalyst available under visible light irradiation: metal ion-implantation and ionized cluster beam method, Journal of Synchrotron Radiation, vol.8, issue.2, pp.569-571, 2001.
DOI : 10.1107/S090904950001712X

. Yamashita, Organic and carbon aerogels derived from poly(vinyl chloride), Carbon, vol.41, issue.2, pp.285-294, 2003.
DOI : 10.1016/S0008-6223(02)00289-0

X. Yeredla, R. R. Yeredla, and H. Xu, An investigation of nanostructured rutile and anatase plates for improving the photosplitting of water, Nanotechnology, vol.19, issue.5, 2008.
DOI : 10.1088/0957-4484/19/05/055706

. Yeung, Reactivity and antimicrobial properties of nanostructured titanium dioxide, Catalysis Today, vol.143, issue.3-4, pp.218-224, 2008.
DOI : 10.1016/j.cattod.2008.09.036

. Yoda, Adsorption and photocatalytic decomposition of benzene using silica-titania and titania aerogels : effect of supercritical drying, Journal of Sol-Gel Science and Technology, vol.22, issue.1/2, pp.75-81, 2001.
DOI : 10.1023/A:1011216404208

. Yoshida, Syntheses of TiO2(B) nanowires and TiO2 anatase nanowires by hydrothermal and post-heat treatments, Journal of Solid State Chemistry, vol.178, issue.7, pp.2179-2185, 2005.
DOI : 10.1016/j.jssc.2005.04.025

. Yuan, Preparations and photocatalytic hydrogen evolution of N-doped TiO2 from urea and titanium tetrachloride, International Journal of Hydrogen Energy, vol.31, issue.10, pp.1326-1331, 2006.
DOI : 10.1016/j.ijhydene.2005.11.016

. Zacharaki, The influence of calcination on the size of nanocrystals, porous structure and acid???base properties of mesoporous anatase used as catalytic support, Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol.324, issue.1-3, pp.208-216, 2008.
DOI : 10.1016/j.colsurfa.2008.04.019

. Zhang, Effects of calcination on the photocatalytic properties of nanosized TiO2 powders prepared by TiCl4 hydrolysis, Applied Catalysis B: Environmental, vol.26, issue.3, pp.207-215, 2000.
DOI : 10.1016/S0926-3373(00)00122-3

. Zhao, under Visible Irradiation, Journal of the American Chemical Society, vol.126, issue.15, pp.4782-4783, 2004.
DOI : 10.1021/ja0396753

. Zhao, Sol-gel preparation of Ti1???xVxO2 solid solution film electrodes with conspicuous photoresponse in the visible region, Thin Solid Films, vol.339, issue.1-2, pp.123-128, 1999.
DOI : 10.1016/S0040-6090(98)01227-9

. Zhou, Preparation and properties of vanadium-doped TiO 2 photocatalysts, J. Phys. D: Appl. Phys, vol.43, p.3, 2009.

. Znaidi, A semi-continuous process for the synthesis of nanosize TiO2 powders and their use as photocatalysts, Materials Research Bulletin, vol.36, issue.5-6, pp.811-825, 2001.
DOI : 10.1016/S0025-5408(00)00482-7