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A novel, photoinduced hydrogen evolution system involving a tin porphyrin ( SnTPP ) fixed membrane was studied with two different types of PVC membranes: homogeneous and porous. It was found that the porous PVC membrane system could efficiently reduce water to evolve hydrogen compared with the homogeneous type. The results confirmed that hydrogen evolution in the SnTPP / PVC membrane system depended strongly on the surface of the membrane and the degree of aggregation of SnTPP . SEM images of the two types of SnTPP / PVC membranes also show the differences in both morphologies.
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Wang et al. (2003) studied this question.
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