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Four different porphyrin compounds as stabilizers prepared a series of Pt sol nanoparticle catalysts were characterized by UV-vis, XRD, TEM, FT-IR and other methods , and for the photocatalytic decomposition of water into hydrogen reaction. Peripheral groups of the porphyrin molecules and the porphyrin ring with triphenylamine molecules link photocatalytic performance . (1) 5, 10, 15, 20 - 4 - (4 - benzene hydroxy ) - porphyrin ( THBP ) stabilizer , prepared by ethylene glycol reduction method stable Pt sol (denoted as Pt @ THBP), particle size distribution between 1 ~ 3 nm , the particle size and the proportion of Pt / stabilizer . UV - visible light irradiation , Pt @ THBP light to produce hydrogen reaction catalysis , hydrogen generation speed can reach 2.23 × 10-4 mmol / min . ( 2) Preparation of a series of 5,10,15,20 - 4 - (4 - phenylmethyl ) - porphyrin (THMP) as a stabilizer metal Pt sol (denoted as the Pt @ THMP ) , prepared as a sol exhibit good stability . The Pt @ THMP has high photocatalytic activity, which generates hydrogen gas rate was 3.35 × 10-4 mmol / min . This shows that the porphyrin ring peripheral groups photocatalytic performance , the porphyrin ring outside the introduction of higher photocatalytic hydrogen production efficiency than hydroxy - methyl . (3 ) 5,10,15,20 - 4 - (4 - the dianilinoterephthalic -1 - benzoyloxy) - porphyrin ( TDABP ) - stabilizers, to prepare a series of stable sol ( Vocabulary for Pt @ TDABP). Sol photocatalytic hydrogen production reaction rate up to 2.77 × 10-4 mmol / min . The experimental results show that : the triphenylamine molecule is introduced on the porphyrin ring , and its stabilizing effect on the metal is enhanced, but the photocatalytic action weaker than that of the Pt @ TMBP . (4) 5,10,15,20 - 4 - (4 - dianilinoterephthalic -1 - styryl ) - the porphyrin ( TDASP ) as a stabilizing agent , prepared a series of glycol reduction method the stable sol ( recorded as Pt @ TDASP ) . The Pt @ TDASP sol photocatalytic hydrogen production speed and Pt @ TDABP quite porphyrin ring by a double bond the triphenylamine connection with the ester group and triphenylamine connection photocatalytic activity , 2.95 × 10-4 mmol / min, impact.
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