کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1666892 1518076 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hierarchical ZnO nanorod-array films with enhanced photocatalytic performance
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Hierarchical ZnO nanorod-array films with enhanced photocatalytic performance
چکیده انگلیسی

Hierarchical thin-film photocatalysts exhibiting surface roughness at two length scales were prepared by the consecutive formation of ZnO microstripes and ZnO nanorod-array. ZnO stripes with microscale roughness were fabricated after removing the ink-jet printed ribs. Then, nanoscale roughness was achieved by the growth of ZnO nanorods on the surface. The surface morphology and structural and optical properties were characterized by FESEM, X-ray diffraction, XPS, photoluminescence and UV–vis spectroscopy. The photocurrents of selectively grown ZnO nanorods under UV or visible light irradiation were investigated by scanning electrochemical microscopy with a scanning optical fiber. The surface comprising hierarchical microstructures and nanostructures not only increases the surface area of the photocatalyst but also helps the diffusion of organic dye during the photodegradation test. The photodegradation efficiency of the hierarchical thin-film photocatalyst was improved compared with the ZnO nanorod photocatalyst. Photocatalytic performance was further enhanced when Ag nanoparticles were deposited on the hierarchical photocatalyst.


► Hierarchical photocatalyst made by ink-jet printing and hydrothermal process
► Immobilized hierarchical photocatalyst with microscale and nanoscale roughness
► Increased active surface area and improved diffusion of dye
► Improved photocatalysis by changing surface texture and depositing Ag nanoparticle

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 528, 15 January 2013, Pages 167–174
نویسندگان
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