کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1523840 995331 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Partial conversion reaction of ZnO nanowires to ZnSe by a simple selenization method and their photocatalytic activities
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Partial conversion reaction of ZnO nanowires to ZnSe by a simple selenization method and their photocatalytic activities
چکیده انگلیسی

A simple novel synthetic method for preparing ZnSe/ZnO heterostructured nanowire (NW) arrays via the selenization of ZnO NWs is reported. A hydrothermally grown ZnO NWs array on a glass substrate was reacted with selenium vapor to generate a 20–30 nm of zincblend ZnSe nanoparticles (NPs) on wurtzite ZnO NWs. A growth mechanism was proposed based on SEM, XRD, and TEM analysis to explain the partial chemical conversion of ZnO NW surfaces into ZnSe NPs. This mechanism is applicable to the synthesis of other chalcogenide compounds. The as-synthesized ZnSe/ZnO heterojunctions showed enhanced UV–visible light absorption properties. The materials exhibited excellent photocatalytic activity toward the decomposition of an organic dye compared to the bare ZnO due to enhanced light absorption and the type-II cascade band structure.


► A novel synthesis method was developed for type-II ZnSe/ZnO heterostructure nanowires.
► This facile synthetic method is applicable to the growth of other chalcogenide nanomaterials.
► Our ZnSe/ZnO heterostructure nanowires exhibited highly enhanced photocatalytic activity.
► Improved light absorption and efficient charge transfer/separation was observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 137, Issue 1, 15 November 2012, Pages 194–199
نویسندگان
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