Details
| Original language | English |
|---|---|
| Article number | 125909 |
| Journal | Chemical engineering journal |
| Volume | 400 |
| Early online date | 17 Jun 2020 |
| Publication status | Published - 15 Nov 2020 |
Abstract
The surface hydroxyl groups in TiO 2 are crucial to many of its practical applications, but their controlled synthesis represents still a challenge. Herein, nanostructured TiO 2 with rich surface hydroxyl species groups and high crystallinity (TiO 2-OH) by high-temperature calcination have been developed by using the ionic liquid. Experimental measurements and theoretical calculations show a strong surface hydroxyl signal of two-dimensional 1H TQ-SQ MAS NMR, as well as clear changes of the charge density of TiO 2 with the rich surface hydroxyl species. Moreover, the rich surface hydroxyl species groups in TiO 2 not only significantly enhance its performances involving photogenerated current, photocatalysis and energy strorage but also show a bright future on marine applications because of its high activity and stability in simulation seawater. The characteristics and mechanism have been proposed to clarify the generation of surface hydroxyl species of TiO 2 and the correponding directed hole-trapping at an atomic-/nanoscale.
Keywords
- Directed catalysis, Hierarchical structure, Hydrogen production from seawater, Surface hydroxyl, Titanium oxide
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Environmental Science(all)
- Environmental Chemistry
- Chemical Engineering(all)
- General Chemical Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
Sustainable Development Goals
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In: Chemical engineering journal, Vol. 400, 125909, 15.11.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Rich surface hydroxyl design for nanostructured TiO2 and its hole-trapping effect
AU - Xiao, S.-T.
AU - Wu, S.-M.
AU - Dong, Y.
AU - Liu, J.-W.
AU - Wang, L.-Y.
AU - Wu, L.
AU - Zhang, Y.-X.
AU - Tian, G.
AU - Janiak, C.
AU - Shalom, M.
AU - Wang, Y.-T.
AU - Li, Y.-Z.
AU - Jia, R.-K.
AU - Bahnemann, D.W.
AU - Yang, X.-Y.
N1 - Funding information: This work was supported by a joint DFG-NSFC project (DFG JA466/39-1, NSFC grant 51861135313), National Key R&D Program of China ( 2017YFC1103800 ), Jilin Province Science and Technology Development Plan ( 20180101208JC ), NSFC ( U1662134 , 21711530705 ), HPNSF ( 2016CFA033 ) FRFCU ( 19lgzd16 ) and ISTCP ( 2015DFE52870 ).
PY - 2020/11/15
Y1 - 2020/11/15
N2 - The surface hydroxyl groups in TiO 2 are crucial to many of its practical applications, but their controlled synthesis represents still a challenge. Herein, nanostructured TiO 2 with rich surface hydroxyl species groups and high crystallinity (TiO 2-OH) by high-temperature calcination have been developed by using the ionic liquid. Experimental measurements and theoretical calculations show a strong surface hydroxyl signal of two-dimensional 1H TQ-SQ MAS NMR, as well as clear changes of the charge density of TiO 2 with the rich surface hydroxyl species. Moreover, the rich surface hydroxyl species groups in TiO 2 not only significantly enhance its performances involving photogenerated current, photocatalysis and energy strorage but also show a bright future on marine applications because of its high activity and stability in simulation seawater. The characteristics and mechanism have been proposed to clarify the generation of surface hydroxyl species of TiO 2 and the correponding directed hole-trapping at an atomic-/nanoscale.
AB - The surface hydroxyl groups in TiO 2 are crucial to many of its practical applications, but their controlled synthesis represents still a challenge. Herein, nanostructured TiO 2 with rich surface hydroxyl species groups and high crystallinity (TiO 2-OH) by high-temperature calcination have been developed by using the ionic liquid. Experimental measurements and theoretical calculations show a strong surface hydroxyl signal of two-dimensional 1H TQ-SQ MAS NMR, as well as clear changes of the charge density of TiO 2 with the rich surface hydroxyl species. Moreover, the rich surface hydroxyl species groups in TiO 2 not only significantly enhance its performances involving photogenerated current, photocatalysis and energy strorage but also show a bright future on marine applications because of its high activity and stability in simulation seawater. The characteristics and mechanism have been proposed to clarify the generation of surface hydroxyl species of TiO 2 and the correponding directed hole-trapping at an atomic-/nanoscale.
KW - Directed catalysis
KW - Hierarchical structure
KW - Hydrogen production from seawater
KW - Surface hydroxyl
KW - Titanium oxide
UR - http://www.scopus.com/inward/record.url?scp=85087012509&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2020.125909
DO - 10.1016/j.cej.2020.125909
M3 - Article
VL - 400
JO - Chemical engineering journal
JF - Chemical engineering journal
SN - 1385-8947
M1 - 125909
ER -