1Nanomaterials Laboratory, Department of Chemical Engineering, College of Engineering Technology, Can Tho University, 3/2 Street, Ninh Kieu District, Can Tho City, Vietnam
2Department of Civil Engineering, College of Engineering Technology, Can Tho University, 3/2 Street, Ninh Kieu District, Can Tho City, Vietnam
3Department of Chemical Engineering, HCMC University of Food Industry, No. 140, Le Trong Tan Street, Tan Phu District, Ho Chi Minh City, Vietnam
*Corresponding author: Dr. Tran Thi Bich Quyen; Email: ttbquyen@ctu.edu.vn
Online published on 17 April, 2017.
In this work, SiO2/TiO2 nanocomposites have been successfully synthesized hydrothermal with rapid reaction time under supporting of microwave at power of 150 W, for 1 h using SiO2 from rice husk ash (RHA) as silica source in Vietnam. The SiO2/TiO2 nanocomposites were characterized by UV-vis spectroscopy, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), transmission electron microscopy (TEM), fourier transforminfrared spectroscopy (FTIR), and X-ray diffraction (XRD). It was also demonstrated that the SiO2/TiO2 nanocomposites were extremely good catalytic activity and high stability. Our results show that SiO2/TiO2 nanocomposites were obtained with particle sizes in range from 10–30 nm and highly pure formed in 1 h. Moreover, the SiO2/TiO2 nanocomposites' stability increased to more than 24 h for investigating their catalytic activity in the saltwater medium with highly treatment efficiency respective about 66.4% and 75.2% under the lighting conditions of the sunlight and the UVlight in 3 h for comparisons.
RHA, SiO2/TiO2 nanocomposites, catalytic activity, microwave, sunlight, UV-light
