کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1553360 1513227 2014 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure, morphologies and dye removal efficiency of ZnO nanorods grown on polycrystalline Zn substrate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Structure, morphologies and dye removal efficiency of ZnO nanorods grown on polycrystalline Zn substrate
چکیده انگلیسی


• Rod-like ZnO with the different morphologies were grown on polycrystalline Zn substrate.
• Nanostructured ZnO on substrate was used directly to remove azo dye Congo red from wastewater.
• Remove Congo red from wastewater requiring no external energy or reagents input.
• Remove Congo red from wastewater can be carried out under various ambient conditions.

Rod-like ZnO with the different morphologies were grown on polycrystalline Zn substrate by a simple hydrothermal process in a NaOH or NH4OH solution at the hydrothermal temperature range from 80 to 150 °C for different reaction time. Variations preparation in the different alkali solution concentration, hydrothermal temperature, and reaction times were explored to shed light on the morphology of the rod-like nanostructures. The thorough structural characterization including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron diffraction, and X-ray photoelectron spectrum (XPS) were employed to examine the morphology and the microstructure of the final products. It was found that alkali solution concentration, hydrothermal temperature and time have important influence on the morphology of the rod-like nanostructures. The dye removal efficiency of ZnO nanorods was explored by the decoloration of azo dye Congo red (CR). In order to obtain the optimum removal conditions of Congo red, the performance of removing CR with various initial concentrations by ZnO nanorods on Zn substrates with different morphologies was tested under various ambient conditions (visible light illumination and darkness). All prepared samples showed an excellent dye removal efficiency for organic pollutants CR from wastewater, making them promising candidates for the wastewater treatment.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Superlattices and Microstructures - Volume 74, October 2014, Pages 279–293
نویسندگان
, , , , ,