Nano-ilmenite with Dual Functions of Photocatalysis and Adsorption
Water pollution, including the generation of wastewater, is becoming an increasingly serious global issue. In this study, ilmenite (FeTiO3) nano-photocatalysts were synthesized via a simple sol-gel method to determine their applicability to wastewater remediation. Methylene blue was photocatalytically decomposed by visible light in the presence of nano-ilmenite, and batch experiments were performed to study the adsorption characteristic. The results reveal that nano-ilmenite exhibits good photocatalytic activity under visible-light illumination (rate constant, 0.029 min−1) and possesses a high adsorption capacity (22.2 mg/g) for copper ions. These results indicate that nano-ilmenite is a good photocatalyst. The photocatalytic activity combined with its high copper ion adsorption activity renders it a suitable material for wastewater treatment.
We thank the National Science Council for financial support [Grant: NSC 99-2116-M-006-007]. Prof. W.T. Jiang of the Department of Earth Sciences, National Cheng Kung University, is thanked for helping with XRD and TEM measurements. We are grateful to W.T. Kuo in our laboratory for help with some calculations.
Conflict of interest
The authors declare that they have no conflict of interest.
- 12.C.C. Wu, Y.C. Wang, T.F. Lin, H.L. Tsao, P.C. Chen, and J. Chin, Inst. Environ. Eng. 15, 255 (2005).Google Scholar
- 13.C. Namasivayam and K. Prathap, J. Environ. Eng. Manng. 16, 267 (2006).Google Scholar
- 37.S. Lagergren and K. Sven, Vetenskapsakad. Handl. 24, 1 (1898).Google Scholar