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Probe‐Molecule‐Assisted NMR Spectroscopy: A Comparison with Photoluminescence and Electron Paramagnetic Resonance Spectroscopy as a Characterization Tool in Facet‐Specific Photocatalysis
Author(s) -
Peng YungKang,
Fu Yingyi,
Zhang Li,
Teixeira Ivo F.,
Ye Lin,
He Heyong,
Tsang Shik Chi Edman
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201601341
Subject(s) - electron paramagnetic resonance , photoluminescence , spectroscopy , magic angle spinning , photocatalysis , molecule , materials science , nuclear magnetic resonance spectroscopy , characterization (materials science) , photochemistry , adsorption , facet (psychology) , chemistry , catalysis , nuclear magnetic resonance , nanotechnology , organic chemistry , optoelectronics , psychology , social psychology , physics , quantum mechanics , personality , big five personality traits
Photoluminescence (PL) and EPR spectroscopy are the two most commonly used techniques to evaluate surface oxygen vacancies (V O surface ) on photoactive transition metal oxides. However, these techniques have shortcomings in the characterization of facet‐dependent catalysis. Here, we used the chemical adsorption of a 31 P‐containing probe molecule to obtain the distribution/concentration of V O surface as well as other surface features (hydroxyl groups) of ZnO by using 31 P magic‐angle spinning NMR spectroscopy. This facet‐specific technique not only makes cross‐literature comparison feasible but also provides more comprehensive information to lead to a further understanding of the photocatalytic mechanism.
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