Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 5, Issue 5, Pages 3721-3725Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b00341
Keywords
TiO2; Cellulose nanocrystal; Carbon quantum clot; Photocatalytic activity
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Funding
- National Natural Science Foundation of China [51403136, 51421061, J1103315]
- Research Fund for the Doctoral Program of Ministry of Education of China [20130181120067]
- Program for Changjiang Scholars and Innovative Research Teams in University of China [IRT 1026]
- Fundamental Research Funds for the Central Universities of China [2015SCU04A22]
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The mesoporous structure and high exposure of the (001) facet are of great importance to the photocatalytic performance of TiO2. In this Letter, we report using cellulose nanocrystal (CNC) as a sacrificial template to develop mesoporous TiO2 with dominantly exposed (001) facets, for which CNC can provide confined space for the controlled crystal growth of TiO2 and create mesopores after being removed. Owing to the photoluminescence up-conversion, furthermore, carbon quantum dot (C-dot) is introduced to realize visible light catalytic property of TiO2. In particular, the TiO2/C-dot composite with an extremely low content of carbon dot exhibits high catalytic performance, for which the mechanism is discussed. These results indicate such biotemplating method offers the potential to develop more mesoporous nanomaterials with desirable structures.
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