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TiO2/carbonaceous nanocomposite from titanium-alginate coordination compound
De-Qiang Li1, Yu-Jie Meng2, Jun Li2
1College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumchi 830052, Xinjiang, People's Republic of China; Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, People's Republic of China.
We developed efficient titanium dioxide/carbonaceous (TiO2/C) photocatalysts from a titanium-alginate compound. These eco-friendly materials show high performance in degrading methylene blue under simulated sunlight.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Titanium dioxide (TiO2)-based materials are promising eco-friendly photocatalysts.
- Inherent defects like rapid electron recombination and wide bandgap limit TiO2 photocatalyst efficiency.
- Developing novel TiO2/carbonaceous (TiO2/C) composites is crucial for enhanced photocatalysis.
Purpose of the Study:
- To prepare high-efficiency TiO2/C photocatalysts via carbonization of a titanium alginate coordination compound.
- To investigate the photocatalytic performance of the synthesized TiO2/C nanocomposites against methylene blue (MB) under simulated sunlight.
- To explore an extensible approach for creating advanced photocatalysts from polysaccharide-based coordination compounds.
Main Methods:
- Synthesis of TiO2/C nanocomposites by carbonizing a titanium alginate coordination compound.
- Characterization using FT-IR, XPS, XRD, SEM-EDS, TG-DTG, UV-DRS, and N2 adsorption-desorption.
- Photocatalytic degradation of methylene blue (MB) under simulated sunlight irradiation.
Main Results:
- The carbon component was primarily located on the outer layer of TiO2/C composites, enhancing optical sensitization.
- The TiO2/C-20 sample achieved a 97.47% degradation efficiency for MB within 15 minutes under simulated sunlight.
- The photocatalysts exhibited high stability, with only a 0.72% reduction in photodegradation ratio after five cycles.
Conclusions:
- The feasibility of preparing effective photocatalysts from titanium-alginate coordination compounds is demonstrated.
- The study provides a scalable method for producing high-performance photocatalysts using polysaccharide-based coordination compounds.
- The developed TiO2/C nanocomposites offer a promising solution for environmental remediation applications.
