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Engineering the Band Gap States of the Rutile TiO 2 (110) Surface by Modulating the Active Heteroatom
Author(s) -
Yu Yaoguang,
Yang Xu,
Zhao Yanling,
Zhang Xiangbin,
An Liang,
Huang Miaoyan,
Chen Gang,
Zhang Ruiqin
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201803928
Subject(s) - heteroatom , band gap , rutile , photocatalysis , materials science , surface states , adsorption , nanotechnology , optoelectronics , surface (topology) , chemistry , catalysis , mathematics , organic chemistry , ring (chemistry) , geometry
Introducing band gap states to TiO 2 photocatalysts is an efficient strategy for expanding the range of accessible energy available in the solar spectrum. However, few approaches are able to introduce band gap states and improve photocatalytic performance simultaneously. Introducing band gap states by creating surface disorder can incapacitate reactivity where unambiguous adsorption sites are a prerequisite. An alternative method for introduction of band gap states is demonstrated in which selected heteroatoms are implanted at preferred surface sites. Theoretical prediction and experimental verification reveal that the implanted heteroatoms not only introduce band gap states without creating surface disorder, but also function as active sites for the Cr VI reduction reaction. This promising approach may be applicable to the surfaces of other solar harvesting materials where engineered band gap states could be used to tune photophysical and ‐catalytic properties.