Abstract
A tubular continuous-flow photoreactor consisting of a pyrex glass tube 8 mm in diameter packed with titanium dioxide photocatalyst immobilized on 2 mm diameter silica gel beads was constructed to efficiently decompose water contaminants at high-flow rate. To fix titanium dioxide using sol–gel without destroying silica gel beads, the beads were exposed to ethanol vapor and then wetted with ethanol before being dipped into the TiO 2 precursor sol. Photoreactor performance was evaluated for how it decomposed aqueous oxalic acid solution as a model contaminant.
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