Photooxidation of NADH in slurry of titanium dioxide particles with metal ion as an electron acceptor

摘要

In photooxidation tests of nicotinamide adenine dinucleotide (NADH) in titanium dioxide slurry containing Ag~+, Cu~(2+), Ni~(2+), Fe~(3+), [Fe(CN)_6]~(3-) or Fe(III)-EDTA as an electron acceptor, the oxidation rate of NADH was the highest when Fe(III)-EDTA was included in the slurry. In the range of initial concentrations of Fe(III)-EDTA of 0-100 X 10~(03) mol/m~3, it was found that the oxidation rate of NADH increased with an increase in Fe(III)-EDTA concentration during the early phase of photoreaction, and thereafter the reaction system reached a pseudo-steady state with elasped time, giving an approximately constant oxidation rate of NADH.