Synthesis of Ag-modified TiO2 nanotube and its application in photocatalytic degradation of dyes and elemental mercury
Journal
Journal of Chemical Technology and Biotechnology
Journal Volume
94
Journal Issue
10
Pages
3251
Date Issued
2019-10-01
Author(s)
Abstract
© 2019 Society of Chemical Industry BACKGROUND: The non-modified titanium dioxide (TiO2) nanotube (TNT) and silver (Ag)-modified TNT samples were fabricated via an alkaline hydrothermal process. The synthesized samples had a high Brunauer–Emmett–Teller surface area since the resulted TNT was free of calcination, which is different from the traditional synthesized method. The specific surface area of non-modified TNT and Ag-modified TNT samples were 392 and 330 m2 g−1, respectively. RESULTS: The results indicated that anatase phase, cubic silver chloride (AgCl) and Ag co-existed in the Ag-modified TNT sample. In contrast, non-modified TNT sample has only anatase phase. The OH groups, pre-adsorbed water, and oxygen vacancies can be found on the surface of all samples. The Ag-modified TNT sample showed to have higher removal efficiencies than that of non-modified TNT sample for gas-phase elemental mercury, carcinogenic malachite green, crystal violet and mixtures of dyes. CONCLUSION: Although specific surface area of non-modified TNT was larger than that of Ag-modified TNT, the Ag-modified TNT possessed a high-performance photocatalyst due to the electron-hole pairs separation efficiency increase. © 2019 Society of Chemical Industry.
Subjects
calcination-free | carcinogenic dye | electron-hole recombination | elemental mercury | hydrothermal method | photocatalysis
SDGs
Other Subjects
Alkalinity; Calcination; Chemical industry; Chlorine compounds; Dyes; Efficiency; Gases; Mercury (metal); Nanotubes; Photocatalysis; Specific surface area; Stripping (dyes); Titanium dioxide; Yarn; Electron-hole recombination; Elemental mercury; Hydrothermal methods; Hydrothermal process; Photo catalytic degradation; Removal efficiencies; Separation efficiency; Titanium dioxides (TiO2); Silver halides; crystal violet; dye; malachite green; mercury; nanotube; oxygen; silver chloride; silver nanoparticle; titanium dioxide; titanium dioxide nanoparticle; alkaline hydrothermal process; alkalinity; animal tissue; Article; atmospheric pressure; bladder cancer; carcinogenicity; chemical composition; comparative study; controlled study; crystal structure; DNA adduct; gas; health hazard; nanofabrication; nonhuman; photocatalysis; photodegradation; physical chemistry; pore volume; surface area; waste component removal
Publisher
WILEY
Type
journal article