Back to Search
Start Over
Water Disinfection Using Chitosan Microbeads With N-, C-, C-N/TiO2 By Photocatalysis Under Visible Light.
- Source :
- Topics in Catalysis; Jan2021, Vol. 64 Issue 1/2, p142-154, 13p
- Publication Year :
- 2021
-
Abstract
- Chitosan microbeads with C-doped TiO<subscript>2</subscript>, N-doped TiO<subscript>2</subscript> and C,N-codoped TiO<subscript>2</subscript> were prepared to obtain photocatalysts with higher photocatalytic efficiency, active under visible light and easy to removed from aqueous medium. TiO<subscript>2</subscript> powders were synthesized by the sol–gel method and modified using glucose and ammonium nitrate as source of C and N, respectively. Scanning electron microscope (SEM), X-ray diffraction (XRD), DRUV–Vis spectra and Raman techniques, were used to characterize the modified TiO<subscript>2</subscript> powders. The structural and physicochemical properties of the microbeads were analyzed by nitrogen physisorption, functional groups were identified by Fourier transform Infrared (FT-IR) spectroscopy and microbeads were observed by optical microscopy. The microbeads photocatalytic efficiency under visible light was evaluated monitoring the E. coli growth-inhibition, determined by colony count analysis (CFU—colony forming units). Results showed effectiveness in all tested composites to inhibit E. coli growth in 24 h under visible light. Furthermore chitosan microbeads with C,N-codoped TiO<subscript>2</subscript> showed the best performance in the degradation test being the most effective composite to achieving 99.99% of E. coli growth inhibition in less than 4 h. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10225528
- Volume :
- 64
- Issue :
- 1/2
- Database :
- Complementary Index
- Journal :
- Topics in Catalysis
- Publication Type :
- Academic Journal
- Accession number :
- 151916550
- Full Text :
- https://doi.org/10.1007/s11244-020-01356-2