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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: Sol–Gel and Thermally Evaporated Nanostructured Thin ZnO Films for Photocatalytic Degradation of | Nanoscale Res Lett 2009 4 627-634 DOI 10.1007 S11671-009-9290-1 NANO EXPRESS Sol-Gel and Thermally Evaporated Nanostructured Thin ZnO Films for Photocatalytic Degradation of Trichlorophenol A. Abdel Aal Sawsan A. Mahmoud Ahmed K. Aboul-Gheit Received 31 January 2009 Accepted 5 March 2009 Published online 19 March 2009 to the authors 2009 Abstract In the present work thermal evaporation and sol-gel coating techniques were applied to fabricate nanostructured thin ZnO films. The phase structure and surface morphology of the obtained films were investigated by X-ray diffractometer XRD and scanning electron microscope SEM respectively. The topography and 2D profile of the thin ZnO films prepared by both techniques were studied by optical profiler. The results revealed that the thermally evaporated thin film has a comparatively smoother surface of hexagonal wurtzite structure with grain size 12 nm and 51 m2 g. On the other hand sol-gel films exhibited rough surface with a strong preferred orientation of 25 nm grain size and 27 m2 g surface area. Following deposition process the obtained films were applied for the photodegradation of 2 4 6-trichlorophenol TCP in water in presence of UV irradiation. The concentrations of TCP and its intermediates produced in the solution during the photodegradation were determined by high performance liquid chromatography HPLC at defined irradiation times. Complete decay of TCP and its intermediates was observed after 60 min when the thermal evaporated photocatalyst was applied. However by S. A. Abdel Aal H Ecole Nationale Superieure de Chimie de Paris Lab de Physico-Chimie de Surfaces UMR-CNRS 7045 11 rue Pierre et Marie Curie 75005 Paris France e-mail alsayed-ibrahim@enscp.fr foralsayed@gmail.com A. Abdel Aal Surface Protection Corrosion Control Lab Central Metallurgical Research Development Institute CMRDI P.O. Box 87 Hellwan Cairo Egypt S. A. Mahmoud A. K. Aboul-Gheit Process Development Division Egyptian Research Institute Nasr City .
