TAILIEUCHUNG - the fabrication of Ag nanoparticles loaded TiO2 nanotubes by photoreduction method and their photocatalytic activity

In this paper, we survey the effect of the photoreduction (illumination) time and the annealing temperature on the formation of Ag nanoparticles supported on TiO2 nanotubes (Ag/TNTs). | Journal of Science and Technology 54 (1A) (2016) 199-207 THE FABRICATION OF Ag NANOPARTICLES LOADED TiO2 NANOTUBES BY PHOTOREDUCTION METHOD AND THEIR PHOTOCATALYTIC ACTIVITY Pham Van Viet1, 2, Luu Kien Quoc1, Cao Minh Thi2, Le Van Hieu1 1 Faculty of Materials Science, University of Science, VNU-HCMC, 227 Nguyen Van Cu street, District 5, Ho Chi Minh City, Vietnam. 2 CM Thi Laboratory, Ho Chi Minh City University of Technology (HUTECH), 475A Dien Bien Phu street, Binh Thanh District, Ho Chi Minh City, Vietnam * Email: pvviet@ Received: 30 August 2015; Accepted for publication: 26 November 2015 ABSTRACT In this paper, we survey the effect of the photoreduction (illumination) time and the annealing temperature on the formation of Ag nanoparticles supported on TiO2 nanotubes (Ag/TNTs). The morphology, crystal structure and compositions were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS), respectively. The results showed that Ag nanoparticles are supported on TNTs and the amount of Ag nanoparticles could be controlled. The morphology of TNTs can be changed by the photoreduction time and the annealing temperature. Keywords: silver nanoparticles, TiO2 nanotubes, photoreduction, photocatalyst. 1. INTRODUCTION TiO2 is a common material applied in environmental treatment because of its high photocatalytic and chemical stability [1, 2]. Due to the fact that TiO2 has a relatively large band gap ( eV), the photocatalytic reactions of TiO2 are limited by low absorption capability in the visible light (UV) region and a high recombination rate of photogenerated electron–hole pairs formed in photocatalytic activity. Among TiO2 materials at nanoscale, TiO2 nanotubes (TNTs) have the advantages because the proportion reunion of electronic pair - hole is lower than TiO2 nanoparticles. However, TiO2 nanotubes (TNTs) are also a large bandgap material ( eV), so its photocatalytic .

• Hoá học
• Journal of Science and Technology
• Ag nanoparticles loaded TiO2 nanotubes by photoreduction method
• X ray diffraction
• Transmission electron microscopy
• Energy dispersive X ray spectroscopy
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