Controlled synthesis and facets-dependent photocatalysis of TiO2 nanocrystals

Title
Controlled synthesis and facets-dependent photocatalysis of TiO2 nanocrystals
Author(s)
손영구로이[로이]박요한프라드한[프라드한]
Keywords
DOMINANT 001 FACETS; ANATASE TIO2; ENHANCED PHOTOCATALYSIS; NANOPARTICLES; SURFACES; MECHANISMS; PERCENTAGE; REACTIVITY; CRYSTALS; SHAPE
Issue Date
201504
Publisher
IOP PUBLISHING LTD
Citation
SEMICONDUCTOR SCIENCE AND TECHNOLOGY, v.30, no.4
Abstract
Titanium dioxide (TiO2) is a wide band gap semiconductor that has been extensively used in several environmental applications including degradation of organic hazardous chemicals, water splitting to generate hydrogen, dye sensitized solar cells, self cleaning agents, and pigments. Herein we demonstrate the synthesis of TiO2 nanocrystals (NCs) with the shapes of ellipsoids, rods, cuboids, and sheets with different exposed facets using a noncorrosive and nontoxic chemical (i.e. diethanolamine) as the shape controlling agent, unlike hydrofluoric acid commonly used. The TiO2 NCs of diverse shapes with different exposed facets were tested for photocatalytic hydroxyl radical (OH center dot) formation, which determines their photocatalytic behavior and the results were compared with the standard P-25 Degussa. The formation rate of OH center dot per specific surface area was found to be >6 fold higher for rod-shaped TiO2 NCs than that of commercial Degussa P25 catalyst. The highest photocatalytic activity of rod-shaped TiO2 NCs is ascribed to the unique chemical environment of {010} exposed facets which facilitates the electron/hole separation in presence of {101} facets.
URI
http://hdl.handle.net/YU.REPOSITORY/32852http://dx.doi.org/10.1088/0268-1242/30/4/044005
ISSN
0268-1242
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE