Philippine Engineering Journal, Vol 33, No 1 (2012)

Font Size:  Small  Medium  Large

PHOTOCATALYTIC HYDROGEN PRODUCTION USING CLINOPTILOLITE-SUPPORTED, EOSIN Y-SENSITIZED TIO2 FOR WATER SPLITTING

Jesus Marie Tumamao, Joseph Onyl Novilla, Erika Claire J. Azurin, Rizalinda L. de Leon

Abstract


This research aims to explore the possibility of producing hydrogen as an alternative fuel source through photocatalytic water splitting. It also seeks to synthesize a clinoptilolite-supported, Eosin Ysensitized photocatalyst and test its activity in producing hydrogen in the visible light region. The catalyst was prepared by hydrothermal method and was characterized using thermogravimetric analysis and x-ray diffraction. Characterization showed similarities of the catalyst with those presented in literature. The catalyst was sensitized by suspending it in a diethanolamine-water solution where the Eosin Y was dissolved. This suspension was analyzed using UV-vis spectroscopy and was found to exhibit absorbance in the visible light region.

The Kubelka-Munk equation was used to determine the average band gap with a value of 2.76 eV, implying that the water splitting reaction may be successfully carried out using the catalyst. However, the gas chromatograph did not detect hydrogen under irradiation using a halogen lamp, but a positive response was obtained from a sample exposed to sunlight. For future studies, the researchers recommended improving the photocatalytic reactor setup and hydrogen collection method to achieve minimal product loss and generate more accurate results.


Full Text: PDF