کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1552703 | 1513210 | 2016 | 13 صفحه PDF | دانلود رایگان |
• Ni-doped ZnO–SnO2 nanocomposites were prepared from hydrothermal method.
• Structural and optical properties of Ni-doped ZnO–SnO2 nanocomposites were investigated.
• The presence of nickel impacts more specifically the optical parameters of ZnO nanoparticles.
• High photocatalytic activity of ZnO–SnO2 nanoparticles is seen under UV or visible light irradiation.
The paper reports on the synthesis of nickel-doped ZnO–SnO2 nanocomposites with a molar ratio Zn:Sn of 2:1 using the hydrothermal method followed by calcination at 700 °C. The resulting nanocomposites were characterized using X-ray diffraction (XRD) patterns, transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and Energy-dispersive X-ray spectroscopy (EDX). The results revealed that the Ni/ZnO–SnO2 material consists of aggregated cassiterite SnO2 and wurtzite ZnO nanoparticles (NPs) with a size ranging from 14 to 40 nm. Furthermore, they show that Ni adding induces a dominant effect on the optical, structural and morphological properties of ZnO–SnO2 NPs. The photocatalytic behavior of the synthesized nanocomposites is investigated using rhodamine B (RhB) as model organic pollutant. A maximum degradation efficiency of 96% is achieved under visible light irradiation. While nickel doping did not enhance the photocatalytic activity of ZnO–SnO2 NPs, the photocatalytic performance of Ni/ZnO–SnO2 NPs is much higher than that of Ni-doped ZnO NPs. The photodegradation mechanism is believed to occur through photosensitization.
Journal: Superlattices and Microstructures - Volume 91, March 2016, Pages 225–237