期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 2, 页码 1976-1986出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b14025
关键词
nanoparticle; doping; band edge shifting; visible light photocatalysis; reactive oxygen species; bisphenol A; cytotoxicity
资金
- DST
- CSIR, Government of India [DST/TM/WTI/2K16/02(G), SR/NM/NS-1143/2016, 02(0249)/15/EMR-II]
- CSIR, India
Visible 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 fluorideurea mixture at 300 degrees C, and the extent of N/F doping is tuned by varying the amount of ammonium fluorideurea 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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