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Front Cover: Probing the Interfaces in Nanosilica‐Supported TiO 2 Photocatalysts by Solid‐State NMR and In Situ FTIR (ChemNanoMat 12/2018)
Author(s) -
Singh Rustam,
Bayal Nisha,
Maity Ayan,
Pradeep D. Jeiyendira,
Trébosc Julien,
Madhu P. K.,
Lafon Olivier,
Polshettiwar Vivek
Publication year - 2018
Publication title -
chemnanomat
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201800491
Subject(s) - silanol , titanium , deprotonation , hydroxide , photocatalysis , catalysis , ammonia , fourier transform infrared spectroscopy , chemical engineering , condensation , inorganic chemistry , chemistry , materials science , ion , organic chemistry , physics , engineering , thermodynamics
The ammonia‐assisted functionalization of DFNS by titanium butoxide involves several step‐wise surface reactions, including silanol deprotonation, and then its hetero‐condensation with titanium hydroxide generating Si‐O‐Ti oxobridges. Then the oxy‐anion of titanols condense with another molecule of ammonia‐activated titanium hydroxide to generate Ti‐O‐Ti oxobridges, and these steps repeat to produce amorphous Ti‐O‐Ti network, which on thermal heating yields DFNS/TiO 2 photocatalysts via the condensation of titanols. 1 H, 29 Si, 47,49 Ti NMR and in‐situ IR study confirmed the proposed mechanism of DFNS/TiO 2 catalysts and provided insights into the photocatalytic interfaces between nanosilica and TiO 2 surfaces. More information can be found in the Full Paper by Olivier Lafon, Vivek Polshettiwar et al. on page 1231 in Issue 12, 2018 (DOI: 10.1002/cnma.201800338).