Nanotitania-Activated Carbon with Enhanced Photocatalytic Activity: A Comparison Between Suspended and Immobilized Catalyst for Turquoise Blue Removal

https://doi.org/10.22146/ajche.50064

Jurex Gallo(1*), Josephine Borja(2), Susan Gallardo(3), Pailin Ngaotrakanwiwat(4), Cris Salim(5), Hirofumi Hinode(6)

(1) Department of Chemical Engineering, College of Engineering De La Salle University, Manila, 2401, Philipines
(2) Department of Chemical Engineering, College of Engineering De La Salle University, Manila, 2401, Philipines
(3) Department of Chemical Engineering, College of Engineering De La Salle University, Manila, 2401, Philipines
(4) Department of Chemical Engineering, Burapha University, Chonburi, Thailand
(5) Tokyo Institute Technology, Tokyo, Japan
(6) Tokyo Institute Technology, Tokyo, Japan
(*) Corresponding Author

Abstract


The present study aims to synthesize nanoTiO2-AC and evaluate its property and photocatalytic activity using 254nm UV lamp in suspended system and as immobilized catalyst for the color removal of Turquoise blue dye solution. NanoTiO2-AC is synthesized via the sol-gel method and calcined at 400°C. Various ratio (1:10, 2:10 and 3:10) of weight AC / volume of TiO2 sol were investigated. NanoTiO2-AC is immobilized in glass plates using Polyethylene glycol (PEG) as binder. Powder and immobilized catalysts were characterized using BET, SEM-EDX, TGA, FTIR and XRD techniques. The effect of initial dye concentration, initial solution pH, catalyst loading and AC loading were investigated. SEM images confirmed the uniform distribution of nanoTiO2 attached on the surface of AC. Immobilized 1:10 AC/nanoTiO2 has lower surface area compared to powder 1:10 AC/nanoTiO2. Increasing the AC loading in AC/nanoTiO2 increases the dye adsorption in the composite catalyst to as much as 9%. The initial rate of color removal is faster in suspended catalyst compared to immobilized catalyst. In general, suspended catalyst is more efficient than immobilized catalyst. Further, PEG as a binder can be used to immobilize AC/TiO2 in glass with considerable stability.

Keywords


Photocatalysis, Nanotitania-Activated Carbon, Suspended and Immobilized Catalyst

Full Text:

PDF


References

  1. Andronic, L. and Duta, A. (2008). “The Influence of TiO2 Powder and Film on the Photodegradation of Methyl Orange. Materials Chemistry and Physics 112, 1078-1082.
  2. Ao, Y, Xu, J., Fu, D., Shen, X. and Yuan, C. (2008), “Low Temperature Preparation of Anatase TiO2 -Activated Carbon Composite Film”, Applied Surface Science 254, 4001–4006.
  3. Baran, W., Makowski, A., and Wardas, W. (2008). The Effect of UV Radiation Absorption of Cationic and Anionic Dye Solutions on their Photocatalytic Degradation in the Presence of TiO2. Dyes and Pigments 76, 226 -230.
  4. Bandoz, T. (2006). Interface Science and Technology 7, Activated Carbon Surfaces in Environmental Remediation, Academic Press, 7-8.
  5. Behnajady, M., Modirshahla, N., Daneshvar, N. and Rabbani, M. (2007). Photocatalytic Degradation of C.I. Red by Immobilized ZnO on Glass Plates. Journal of Hazardous Materials 140, 257–263.
  6. Bu, S., Jin, Z., Liu, X., Yang, L. and Cheng, Z. (2005), “Synthesis of TiO2 Porous Thin Films by Polyethylene Glycol Templating and Chemistry of the Process”, Journal of the European Ceramic Society 25, 673–679.
  7. Carpio, E., Zuniga, P., Ponce, S., Solis, J., Rodriguez, J., and Estrada, W. (2005), “Photocatalytic Degradation of Phenol using TiO2 Nanocrystals Supported on Activated Carbon”, Journal of Molecular Catalysis A 228, 293–298.
  8. Chen, Y. and Dionysiou, D. (2006), “TiO2 Photocatalytic Films on Stainless Steel: The Role of Degussa P-25 in Modified Sol–Gel Methods”, Applied Catalysis B: Environmental 62, 255–264.
  9. Gallo, J., Mactal, M., Borja, J. and Gallardo, S. (2009). Photocatalytic Color Removal of Dyes using NanoTiO2. 3rd ERDT Conference, Manila, Philippines.
  10. Han, F., Kambala, V., Srinivasan, M., Rajarathnam, D. and Naidu, R. (2009). Tailored TiO2 Photocatalyst for the Degradation of Organic Dyes in Wastewater Treatment: A Review. Applied Catalysis A: General, 1-62.
  11. Liu, R., Chiu, H., Shiau, C., Yeh, R. and Hung, Y. (2007). Degradation and Sludge Production of Textile Dyes by Fenton and Photo-Fenton Processes. Dye and Pigments 73, 1-6
  12. Rauf, M. and Ashraf, S. (2009). Fundamental Principles and Application of Heterogeneous Photocatalytic Degradation of Dyes in Solutions. Chemical Engineering Journal 151, 10-18.
  13. Sonawane, R., Kale, B. and Dongare, M. (2004). Preparation and Photocatalytic Activity of Fe-TiO2 Thin Films Prepared by Sol-gel Dip Coating. Material Chemistry and Physics 85, 52-57.
  14. Venkatachalam, N., Palanichamy, M. and Muregesan, V. (2007). Sol-gel Preparation and Characterization of Nanosize TiO2: Its Photocatalytic Performance. Materials Chemistry and Physics 104, 454-459.
  15. Wang, W., Silva, C. and Faria, J. (2007), “Photocatalytic Degradation of Chromotrope 2R using Nanocrystalline TiO2/Activated- Carbon Composite Catalyst”, Applied Catalysis B: Environmental 70, 470-478.



DOI: https://doi.org/10.22146/ajche.50064

Article Metrics

Abstract views : 42 | views : 1

Refbacks

  • There are currently no refbacks.