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Facile Synthesis of Hollow TiO 2 Single Nanocrystals with Improved Photocatalytic and Photoelectrochemical Activities
Author(s) -
Liu Min,
Zhong Miao,
Li Hongmei,
Piao Lingyu,
Wang Wenjing
Publication year - 2015
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402368
Subject(s) - photocatalysis , materials science , nanocrystal , anatase , hydrofluoric acid , crystallinity , nanotechnology , hydrothermal circulation , titanium dioxide , nanostructure , chemical engineering , nanoparticle , water splitting , titanium , rutile , catalysis , chemistry , organic chemistry , engineering , metallurgy , composite material
Diverse titanium dioxide (TiO 2 ) nanostructures have attracted considerable attention owing to their broad applications in photocatalytic and photoelectrochemical fields. Herein, TiO 2 hollow single nanocrystals are reported for the first time by using TiO 2 nanopowders as the raw material and hydrofluoric acid as a capping and etching agent through a simple hydrothermal treatment. The influence of experimental parameters such as the concentration of HF, the amount of TiO 2 nanoparticles, the reaction time, and temperature was investigated systematically. The obtained hollow single nanocrystals exhibited enhanced photoelectrochemical and photocatalytic performances attributed to their good crystallinity, suppressed charge recombination, and increased active sites. The current study will provide new insights into the nanostructured engineering of anatase TiO 2 as well as opportunities for the controllable synthesis of hollow single nanocrystals.