Synthesis, characterization and photocatalytic activity of nanoZnO and Ni-Co-ZnO nanocomposites

Journal of Nanoanalysis

مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 01 خرداد 1397

نوع مقاله: Original Research Paper

شناسه دیجیتال (DOI): 10.22034/jna.2018.563722.1080

نویسندگان

Sara Poorarjmand¹؛ Maryam Kargar Razi^{* 2}؛ Ali Reza Mahjoub³؛ Morteza Khosravi¹

¹Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran

²Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran

³Tarbieat Modares University, Tehran, Iran

چکیده

Photocatalysis has attracted significant attention as a potential issue for degradation of toxic organic pollutants such as Congo Red. In this research spherical Pure ZnO nano particles and Ni-Co-ZnO nano composites (Zn0.95Ni0.04Co0.01O, Zn0.95Ni0.025Co0.025O and Zn0.95Ni0.01Co0.04O) have been synthesized by precipitation method. X- ray diffraction, Fourier transform Infra Red ,field emission scanning electron microscopy, EDX and ICP analysis confirmed the structure and composition of samples. The x-ray diffraction analysis (XRD) showed that all samples prepared were of Wurtzite structure and average crystal size of 17nm. Field emission scanning electron microscopy (FESEM) analysis revealed the spherical shape of all samples. The Fourier transform infrared spectroscopy (FT-IR) revealed bands at 435 cm-1, 480 cm-1 and 525 cm-1 are related to Zn-O bonds , related to the stretching vibrating bonds of ZnO. The results illustrated the Ni and Co ions substituted the Zn ions in ZnO crystal lattice successfully. The results showed that some of doped Ni-Co ZnO exhibit enhanced photocatalytic activity , as compared to pure ZnO. Kinetic of de-colorization process for all photo-catalysts followed psedu first order. In degradation process The best photocatlyst was (Zn0.95Ni0.04Co0.01O).

کلیدواژه‌ها

Ni-Co-ZnO nano composite؛ Photocatalytic Activity؛ UV-C light؛ precipitation method