Solid-state, planar photoelectrocatalytic devices using a nanosized TiO2 layer.

  title={Solid-state, planar photoelectrocatalytic devices using a nanosized TiO2 layer.},
  author={Jing Shang and Shaodong Xie and Tong Zhu and Jia Li},
  journal={Environmental science \& technology},
  volume={41 22},
Solid-state planar photoelectrocatalytic devices using a nanosized Ti02 layer have been fabricated and used in the photodegradation of gaseous formaldehyde (HCHO). It is discovered for the first time that in the photocatalytic degradation of HCHO over TiO2 film, besides a well-known process of exciton dissociation expressed as TiO2* --> e(-) + h+ (process A), there exists an HCHO-involved process of exciton dissociation expressed as TiO2 + HCHO* --> TiO2(-) + HCHO+ (process B); these two… 
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