Study on the Photocatalytic Activity of p–n Junction Photocatalyst Cu2O/TiO2
Abstract:p–n junction photocatalyst Cu2O/TiO2 was prepared by ball milling through doping Cu2O into TiO2 and using H2O solution as disperser. The p–n junction photocatalyst Cu2O/TiO2 was characterized by UV-Vis diffuse reflection spectrum, Scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the photocatalyst was evaluated by photocatalytic reduction of Cr2O2−7 and photocatalytic oxidation of methyl orange (MO), respectively. The results showed that, for the photocatalytic reduction of Cr2O2−7, the optimum percentage of doped-Cu2O is 1.0% (weight percentage). The photoreduction activity of the p–n junction Cu2O/TiO2 is much higher than that of TiO2 on the photocatalytic reduction of Cr2O2−7. However, the photooxidation activity of the p–n junction photocatalyst Cu2O/TiO2 is much lower than that of TiO2 on the photocatalytic oxidation of methyl orange (MO). Namely, the p–n junction photocatalyst Cu2O/TiO2 has higher photocatalytic reduction activity, but lower photocatalytic oxidation activity. Cu2O and TiO2 were coupled highly, forming the p–n junction Cu2O/TiO2 photocatalyst. The photocatalytic activity of the p–n junction Cu2O/TiO2 was discussed by the p–n junction principle. Effect of ball milling time on the photocatalytic activity of p–n junction photocatalyst Cu2O/TiO2 was also investigated.
Document Type: Research Article
Publication date: July 1, 2009
More about this publication?
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Ingenta Connect is not responsible for the content or availability of external websites