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Enhanced photocatalytic activity using GO/TiO2 catalyst for the removal of DCA solutions

Abstract: This work aimed to optimize high-performance photocatalysts based on graphene oxide/titanium dioxide (GO/TiO2) nanocomposites for the effective degradation of aqueous pollutants. The catalytic activity was tested against the degradation of dichloroacetic acid (DCA), a by-product of disinfection processes that is present in many industrial wastewaters and effluents. GO/TiO2 photocatalysts were prepared using three different methods, hydrothermal, solvothermal, and mechanical, and varying the GO/TiO2 ratio in the range of 1 to 10%. Several techniques were applied to characterize the catalysts, and better coupling of GO and TiO2 was observed in the thermally synthesized composites. Although the results obtained for DCA degradation showed a coupled influence of the composite preparation method and its composition, promising results were obtained with the photocatalysts compared to the limited activity of conventional TiO2. In the best case, corresponding to the composite synthesized via hydrothermal method with 5% of GO/TiO2 weight ratio, an enhancement of 2.5 times of the photocatalytic degradation yield of DCA was obtained compared to bare TiO2, thus opening more efficient ways to promote the application of photocatalytic remediation technologies.

Other publications of the same journal or congress with authors from the University of Cantabria

 Authorship: Ribao P., Rivero M., Ortiz I.,

 Fuente: Environmental Science and Pollution Research, 2018, 25(35), 34893-34902

Publisher: Springer Science + Business Media

 Publication date: 01/12/2018

No. of pages: 10

Publication type: Article

 DOI: 10.1007/s11356-017-0901-6

ISSN: 0944-1344,1614-7499

 Spanish project: CTM2015-69845-R ; CTQ2015-66078-R

Publication Url: https://doi.org/10.1007/s11356-017-0901-6

Authorship

PAULA RIBAO MARTINEZ