Materials synthesize and production
A. Ghaderi; S. Abbasi; F. Farahbod
Volume 12, Issue 3 , July 2015, , Pages 96-105
Abstract
The aim of the current research is concentrated on the synthesis of the different nanoparticles such as SnO2 and ZnO nanoparticles and SnO2-ZnO hybrid via sol gel method to investigate their photocatalytic applications for removal of methyl orange pollutant in water. Therefore, ZnCl2 and SnCl2.2H2O were ...
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The aim of the current research is concentrated on the synthesis of the different nanoparticles such as SnO2 and ZnO nanoparticles and SnO2-ZnO hybrid via sol gel method to investigate their photocatalytic applications for removal of methyl orange pollutant in water. Therefore, ZnCl2 and SnCl2.2H2O were used as ZnO and SnO2 source respectively. The samples were characterized by X-ray diffraction (XRD) spectroscopy, Fourier transform infrared spectroscopy (FTIR) and UV-Vis spectroscopy. XRD results revealed that the crystalline structure of SnO2 and ZnO nanoparticles were formed. FTIR analysis confirmed the presence of ZnO and SnO2 nanoparticles. Optical properties of samples measured using UV-Vis spectrophotometer and the achieved results demonstrated that the photocatalytic activity ofSnO2-ZnO hybrid for the degradation of methyl orange is higher than that of SnO2 nanoparticles and lower than that of ZnO nanoparticles. Weight fraction dependence study also showed that the degradation of methyl orange dye increases with weight fraction. The experimental results revealed that after 35 min UV light irradiation, the photocatalytic degradation of MO using 0.5 g ZnO, hybrid of ZnOSnO2 and SnO2 nanoparticles reached to 99.35%, 92.14% and 87.91%, respectively. In addition, maximum removal efficiency of MO was related to the suspension containing of 0.5 g of ZnO hybrid equal to 99.35%.
Transport Phenomena,
S. Abbasi; S. M. Zebarjad; S. H. NoieBaghban; A. Youssef; M. S. Ekrami-Kakhki
Volume 12, Issue 1 , January 2015, , Pages 30-40
Abstract
In this paper, we report for the first time, thermal conductivity behavior of nanofluids containing decorated MWCNTs with different amount of TiO2 nanoparticles. TEM image confirmed that the outer surface of MWCNTs successfully decorated with TiO2 nanoparticles. The results of thermal conductivity behavior ...
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In this paper, we report for the first time, thermal conductivity behavior of nanofluids containing decorated MWCNTs with different amount of TiO2 nanoparticles. TEM image confirmed that the outer surface of MWCNTs successfully decorated with TiO2 nanoparticles. The results of thermal conductivity behavior of nanofluids revealed that the thermal conductivity and enhancement ratio of thermal conductivity of MWCNTsTiO2 at different amount of TiO2 nanoparticles are higher than those of TiO2 and MWCNTs nanofluids. Temperature and weight fraction dependence study also shows that the thermal conductivity of all nanofluids increases with temperature and weight fraction. However, the influence of temperature is more significant than that of weight fraction. We also found that decreasing amount ofTiO2 nanoparticles which introduce the outer surface of MWCNTs leads to the augmentation of thermal conductivity of nanofluids containing MWCNTs-TiO2.