tailieunhanh - Báo cáo hóa học: " Porous-ZnO-Nanobelt Film as Recyclable Photocatalysts with Enhanced Photocatalytic Activity"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Porous-ZnO-Nanobelt Film as Recyclable Photocatalysts with Enhanced Photocatalytic Activity | Nanoscale Res Lett 2010 5 1800-1803 DOI s11671-010-9715-x NANO EXPRESS Porous-ZnO-Nanobelt Film as Recyclable Photocatalysts with Enhanced Photocatalytic Activity Min Wang Guang Tao Fei Li De Zhang Received 30 April 2010 Accepted 20 July 2010 Published online 6 August 2010 The Author s 2010. This article is published with open access at Abstract In this article the porous-ZnO-nanobelt film was synthesized by oxidizing the ZnSe-nanobelt film in air. The experiment results show that the porous-ZnO-nanobelt film possesses enhanced photocatalytic activity compared with the ZnO-nanobelt film and can be used as recyclable photocatalysts. The enhanced photocatalytic activity of the porous-ZnO-nanobelt film is attributed to the increased surface area. Therefore turning the 1D-nanostructure film into porous one may be a feasible approach to meet the demand of photocatalyst application. Keywords Porous materials ZnO Nanobelt Photocatalyst Introduction In the past decade some oxide semiconductors have been widely used as photocatalysts for the degradation of organic pollutants in water 1 2 . Based on the viewpoint of application high photocatalytic activity and recyclability are two major factors which should be regarded. Considering that photocatalytic reaction occurs at the surface of catalysts great efforts have been focused on nanoparticles because high photocatalytic activity can be achieved owing to their large surface area in a relative small volume high surface-volume ratio 3-5 . Unfortunately however these M. Wang G. T. Fei L. De Zhang Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences . Box 1129 230031 Hefei People s Republic of China e-mail gtfei@ nanoparticle photocatalysts are generally suspended in solution which limits the practical application due to the difficulty in their recycle