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Title: Enhanced visible-light absorption and dopant distribution of iodine-TiO{sub 2} nanoparticles synthesized by a new facile two-step hydrothermal method

Abstract

In order to prepare visible-light responsive iodine-doped TiO{sub 2}, a new facile synthetic approach was proposed, which started with the cost-efficient and environmentally friendly precursor of undoped anatase TiO{sub 2} to form nanotube structures as templates that collapsed and recrystallized into I-TiO{sub 2} nanopowders in HIO{sub 3} solution, followed by annealing at different temperatures. The modification of TiO{sub 2} to incorporate iodine and form titanium dioxide with significantly enhanced absorption in the visible range of the spectrum was investigated. The extent of iodine dopant incorporation was determined by X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray analysis (EDX) and was found to be homogenously distributed on each nanostructure as determined by electron energy-loss spectroscopy (EELS) elemental mapping and EDX spectroscopy. The modified TiO{sub 2} exhibits a dramatically extended absorption edge beyond 800 nm as compared to the original and unmodified TiO{sub 2}. - Graphical abstract: As-synthesized I-TiO{sub 2} nanoparticles show significantly enhanced visible-light absorption, with the dopant iodine homogenously dispersed on each I-TiO{sub 2} nanostructure based on EELS elemental mapping. Highlights: > Iodine-TiO{sub 2} nanoparticles by a new facile two-step hydrothermal method. > Significantly enhanced light absorption in the visible range of the spectrum. > Homogenous dopant distribution within eachmore » nanostructure.« less

Authors:
 [1];  [2];  [3]
  1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006 (China)
  2. Microscopy and Imaging Center, Texas A and M University, College Station, TX 77843 (United States)
  3. Department of Chemistry, Texas A and M University, College Station, TX 77842 (United States)
Publication Date:
OSTI Identifier:
21580201
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 184; Journal Issue: 8; Other Information: DOI: 10.1016/j.jssc.2011.06.012; PII: S0022-4596(11)00323-9; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; DISTRIBUTION; DOPED MATERIALS; ENERGY-LOSS SPECTROSCOPY; HYDROTHERMAL SYNTHESIS; IODINE; NANOTUBES; PARTICLES; TITANIUM OXIDES; VISIBLE RADIATION; X RADIATION; X-RAY PHOTOELECTRON SPECTROSCOPY; CHALCOGENIDES; ELECTROMAGNETIC RADIATION; ELECTRON SPECTROSCOPY; ELEMENTS; HALOGENS; IONIZING RADIATIONS; MATERIALS; NANOSTRUCTURES; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHOTOELECTRON SPECTROSCOPY; RADIATIONS; SORPTION; SPECTROSCOPY; SYNTHESIS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Citation Formats

Hong Xiaoting, E-mail: hanren.xiaoting@gmail.com, Luo Zhiping, E-mail: luo@mic.tamu.edu, and Batteas, James D., E-mail: batteas@chem.tamu.edu. Enhanced visible-light absorption and dopant distribution of iodine-TiO{sub 2} nanoparticles synthesized by a new facile two-step hydrothermal method. United States: N. p., 2011. Web. doi:10.1016/j.jssc.2011.06.012.
Hong Xiaoting, E-mail: hanren.xiaoting@gmail.com, Luo Zhiping, E-mail: luo@mic.tamu.edu, & Batteas, James D., E-mail: batteas@chem.tamu.edu. Enhanced visible-light absorption and dopant distribution of iodine-TiO{sub 2} nanoparticles synthesized by a new facile two-step hydrothermal method. United States. https://doi.org/10.1016/j.jssc.2011.06.012
Hong Xiaoting, E-mail: hanren.xiaoting@gmail.com, Luo Zhiping, E-mail: luo@mic.tamu.edu, and Batteas, James D., E-mail: batteas@chem.tamu.edu. 2011. "Enhanced visible-light absorption and dopant distribution of iodine-TiO{sub 2} nanoparticles synthesized by a new facile two-step hydrothermal method". United States. https://doi.org/10.1016/j.jssc.2011.06.012.
@article{osti_21580201,
title = {Enhanced visible-light absorption and dopant distribution of iodine-TiO{sub 2} nanoparticles synthesized by a new facile two-step hydrothermal method},
author = {Hong Xiaoting, E-mail: hanren.xiaoting@gmail.com and Luo Zhiping, E-mail: luo@mic.tamu.edu and Batteas, James D., E-mail: batteas@chem.tamu.edu},
abstractNote = {In order to prepare visible-light responsive iodine-doped TiO{sub 2}, a new facile synthetic approach was proposed, which started with the cost-efficient and environmentally friendly precursor of undoped anatase TiO{sub 2} to form nanotube structures as templates that collapsed and recrystallized into I-TiO{sub 2} nanopowders in HIO{sub 3} solution, followed by annealing at different temperatures. The modification of TiO{sub 2} to incorporate iodine and form titanium dioxide with significantly enhanced absorption in the visible range of the spectrum was investigated. The extent of iodine dopant incorporation was determined by X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray analysis (EDX) and was found to be homogenously distributed on each nanostructure as determined by electron energy-loss spectroscopy (EELS) elemental mapping and EDX spectroscopy. The modified TiO{sub 2} exhibits a dramatically extended absorption edge beyond 800 nm as compared to the original and unmodified TiO{sub 2}. - Graphical abstract: As-synthesized I-TiO{sub 2} nanoparticles show significantly enhanced visible-light absorption, with the dopant iodine homogenously dispersed on each I-TiO{sub 2} nanostructure based on EELS elemental mapping. Highlights: > Iodine-TiO{sub 2} nanoparticles by a new facile two-step hydrothermal method. > Significantly enhanced light absorption in the visible range of the spectrum. > Homogenous dopant distribution within each nanostructure.},
doi = {10.1016/j.jssc.2011.06.012},
url = {https://www.osti.gov/biblio/21580201}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 8,
volume = 184,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2011},
month = {Mon Aug 15 00:00:00 EDT 2011}
}