T. Sato et al., PHOTOCHEMICAL REDUCTION OF NITRATE TO AMMONIA USING LAYERED HYDROUS TITANATE CADMIUM SULFIDE NANOCOMPOSITES/, Journal of chemical technology and biotechnology, 67(4), 1996, pp. 345-349
The photocatalytic activity of H2Ti4O9/CdS nanocomposites incorporatin
g CdS particles, less than 0.8 nm thick, in the interlayer of H2Ti4O9
was evaluated for the reduction of NO3- with and without methanol. NO3
- was photochemically reduced by bandgap illumination in the presence
of H2Ti4O9/CdS nanocomposites with and without methanol although unsup
ported CdS showed no noticeable photocatalytic activity for NO3- reduc
tion. The oxidation of CdS in H2Ti4O9/CdS to SO42- was accompanied by
NO3- reduction without methanol, whereas addition of methanol was usef
ul to promote the NO3- reduction and depress the oxidation of CdS. The
catalytic activity of H2Ti4O9/CdS greatly increased with doping Pt pa
rticles in the interlayer.