The photocatalytic water splitting is a promising process for producing H(2) from two abundant renewable sources of water and solar light with the aid of a suitable photo catalyst In this work a combination of sensitizer addition and noble metal loading was employed to modify perovskite photocatalysts in order to achieve the enhancement of photocatalytic H(2) production under visible light irradiation The dependence of the H(2) production on type of mesoporous assembled perovskite titanate nanocrystal photo catalysts (MgTiO(3) CaTiO(3) and SrTiO(3)) calcination temperature of photocatalyst Pt loading type and concentration of electron donor (diethanolamine DEA and triethanolamine TEA) concentration of sensitizer (Eosin Y E Y) photocatalyst dosage and initial solution pH, was systematically studied The experimental results showed that the 0 5 wt % Pt loaded mesoporous assembled SrTiO(3) nanocrystal synthesized by a single step sol gel method and calcined at 650 degrees C exhibited the highest photocatalytic H(2) production activity from a 15 vol% DEA aqueous solution with dissolved 0 5 mM E Y Moreover the optimum photocatalyst dosage and initial solution pH for the maximum photocatalytic H(2) production activity were found to be 6 g/l and 11 6 respectively (C) 2010 Professor T Nejat Veziroglu Published by Elsevier Ltd All rights reserved