am7b14025_si_liveslides.zip (9.81 MB)
Nitrogen and Fluorine Codoped, Colloidal TiO2 Nanoparticle: Tunable Doping, Large Red-Shifted Band Edge, Visible Light Induced Photocatalysis, and Cell Death
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posted on 2018-02-14, 17:53 authored by Aritra Biswas, Atanu Chakraborty, Nikhil R. JanaVisible
light photocatalysis by TiO2 requires efficient doping
of other elements with red-shifted band edge to the visible region.
However, preparation of such TiO2 with tunable doping is
challenging. Here we report a method of making nitrogen (N) and fluorine
(F) codoped TiO2 nanoparticle with tunable doping between
1 and 7 at. %. The preparation of N, F codoped TiO2 nanoparticle
involves reaction of colloidal TiO2 nanorods with an ammonium
fluoride–urea mixture at 300 °C, and the extent of N/F
doping is tuned by varying the amount of ammonium fluoride–urea
and the reaction time. Resultant colloidal N, F codoped TiO2 nanoparticles show doping dependent shifting of the band edge from
the UV to near-IR region, visible light induced generation of reactive
oxygen species (ROS), and visible light photodegradation of bisphenol
A. A colloidal form of doped TiO2 nanoparticle offers labeling
of cells, visible light induced ROS generation inside a cell, and
successive cell death. This work shows the potential advantage of
anisotropic nanoparticle precursor for tunable doping and colloidal
form of N, F codoped TiO2 nanoparticle as a visible light
photocatalyst.
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Keywords
Visible Light Induced PhotocatalysisLarge Red-Shifted Band EdgeROStunable dopingColloidal TiO 2 Nanoparticleanisotropic nanoparticle precursorred-shifted band edgeF codoped TiO 2 nanoparticles show dopingUVF codoped TiO 2 nanoparticlereactive oxygen speciesCell Death Visible light photocatalysisTiO 2 nanorodsTiO 2 nanoparticleTiO 2codoped TiO 2 nanoparticle
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