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Facile synthesis of TiO2/CNC nanocomposites for enhanced Cr(VI) photoreduction: Synergistic roles of cellulose nanocrystals
- Source :
- Carbohydrate Polymers. 233:115838
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- In this study, TiO2 nanocrystals were synthesized in the scaffold of cellulose nanocrystal (CNC) using in situ hydrolysis, where the morphology and size of TiO2 was controlled by CNC’s functional groups and surface charge. The resulting TiO2/CNC nanocomposites showed a superior photocatalytic activity for Cr(VI) reduction under visible light (λ > 420 nm) due to the combined effects of small TiO2 size and ligand-to-metal charge transfer (LMCT) complex between CNC and TiO2. It was found that the charge-enriched CNC not only acted as a template to direct the crystal growth of TiO2, but also played essential roles on light harvesting and charge transfer thereby promoting the photoreduction of Cr(VI). The demonstrated system represents a unique pathway to develop a lower cost and efficient purification material for remediation of Cr(VI).
- Subjects :
- Materials science
Nanocomposite
Polymers and Plastics
Organic Chemistry
Crystal growth
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
Hydrolysis
chemistry
Nanocrystal
Chemical engineering
Materials Chemistry
Photocatalysis
Surface charge
Cellulose
0210 nano-technology
Visible spectrum
Subjects
Details
- ISSN :
- 01448617
- Volume :
- 233
- Database :
- OpenAIRE
- Journal :
- Carbohydrate Polymers
- Accession number :
- edsair.doi...........4776bdf6a084b4585d692e2360a6df47