Visible Light Driven Heterojunction Photocatalyst of CuO-CuO Thin Films for Photocatalytic Degradation of Organic Pollutants.

A high recombination rate and low charge collection are the main limiting factors of copper oxides (cupric and cuprous oxide) for the photocatalytic degradation of organic pollutants. In this paper, a high performance copper oxide photocatalyst was developed by integrating cupric oxide (CuO) and cuprous oxide (CuO) thin films, which showed superior performance for the photocatalytic degradation of methylene blue (MB) compared to the control CuO and CuO photocatalyst. Our results show that a heterojunction photocatalyst of CuO-CuO thin films could significantly increase the charge collection, reduce the recombination rate, and improve the photocatalytic activity.

Evaluation of Solar-Driven Photocatalytic Activity of Thermal Treated TiO₂ under Various Atmospheres.

In this report, the photocatalytic activity of P25 has been explored and the influence of thermal treatment under various atmospheres (air, vacuum and hydrogen) were discussed. The samples' characteristics were disclosed by means of various instruments including X-ray diffraction (XRD), Electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS) and UV⁻vis. This study also accentuates various states of the oxygen vacancy density formed inside the samples as well as the colour turning observed in treated P25 under various atmospheres.

Flower-like 3-dimensional hierarchical CoO/NiO microspheres for 4-nitrophenol reduction reaction.

Aromatic nitro compounds are toxic and not biodegradable. Therefore, the elimination of nitro groups is very important. Metal catalysts play an important role in the catalytic transformation.