Visible-light-sensitized production of hydrogen using perfluorosulfonate polymer-coated TiO2 nanoparticles: an alternative approach to sensitizer anchoring

Langmuir : the ACS Journal of Surfaces and Colloids
Hyunwoong Park, Wonyong Choi

Abstract

TiO(2) sensitized by derivatized ruthenium bipyridyl complexes has been intensively investigated as a tool to utilize visible light. This article describes an alternative approach to attaching ruthenium complex sensitizers at the TiO(2)/H(2)O interface, which is a much simpler and more efficient way to produce hydrogen. The surface of TiO(2) particles are simply coated with perfluorosulfonate polymer (cation-exchange resin: Nafion), and then Ru(bpy)(3)(2+) (as a cationic form), whose bipyridyl ligands are not functionalized with carboxylic acid groups, are bound within the Nafion layer through electrostatic attraction. The visible-light-induced production of H(2) on Nf/TiO(2) using simple Ru(bpy)(3)(2+) as a sensitizer is far more efficient than that on Ru(dcbpy)(3)-TiO(2), upon which many sensitized photoelectrochemical conversion systems are based. Effects of various experimental parameters such as pH, concentration of Ru(bpy)(3)(2+), Nafion loading, and the kind of TiO(2) were investigated. Under optimized conditions, the H(2) production rate was about 80 mumol/h, which corresponds to an apparent photonic efficiency of 2.6%. The roles of the Nafion layer on TiO(2) in the sensitized H(2) production are proposed to be twofold:...Continue Reading

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Citations

May 1, 2013·Chemical Reviews·Alexey V AkimovOleg V Prezhdo
May 9, 2009·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Tarek A KandielDetlef W Bahnemann
Jun 28, 2012·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Sung Kyu ChoiHyunwoong Park
Jan 18, 2014·Physical Chemistry Chemical Physics : PCCP·Mizuki MatsuokaMakoto Ogawa
Oct 28, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Robin BrimblecombeLeone Spiccia
May 31, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Gui-Ju ZhangChi-Ming Che
Sep 18, 2009·Chemistry : a European Journal·Yiseul ParkWonyong Choi
May 1, 2010·ChemSusChem·Dennis Y C LeungXianzhi Fu
Nov 17, 2009·Accounts of Chemical Research·G Charles DismukesGerhard F Swiegers

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