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New Journal of Chemistry
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ARTICLE
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experiments, that a band alignment of ∼ 0.4 eV exists between
anatase and rutile with anatase possessing the higher electron
affinity, or work function. These results help us to explain the
robust separation of photoexcited charge carriers between the
two phases and highlight a route to improved photocatalysts.
This alignment is the likely driving force for the increased
photoactivity of mixed-phase composite materials over their
individual counterparts. Nonetheless, this study also shows
that the electron-hole pair recombination can readily be
controlled by creating intrinsic defects, and thus it can
efficiently oxidize the organics, which are important steps in
developing photocatalysis as a sustainable technology.
DOI: 10.1039/D0NJ02457K
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Conflicts of interest
“There are no conflicts to declare”.
Acknowledgement
The authors thank Department of Science and Technology
(DST), New Delhi, for funding NCCR, IIT-Madras; Professor B.
Viswanathan for fruitful discussion. This work is supported by
the grant-in-aid for scientific research on priority areas under
technology systems development programme - solar hydrogen
(DST/TSG/SH/2011/106-G), and industrial research and
development projects in the framework of Indian-Hungarian
Science and Technology Cooperation Programme under grant
No. DST/INT/HUN/P-13/2017.
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8 | J. Name., 2012, 00, 1-3
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