A decade of nanosize TiO₂ material design for a novel chemical sensor

6^th International Conference and Exhibition on Materials Science and Engineering

September 12-14, 2016 Atlanta, USA

Muhammad Nurdin and Maulidiyah

Universitas Halu Oleo, Indonesia

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Nanosize TiO2 material was succesfully designed and fabricated as a chemical oxygen demand (COD) sensor after more than a decade of intensive research. The material was extracted from iron sand (ilmenit natural minerals) and designed by M-N (metal-nitrogen) double doped TiO2 for degradation of organic pollutants under visible (Sun Harvesting) irradiation. TiO2 film was immobilized on an ITO (Indium Tin Oxide) glass for electrode preparation. The film was applied by a dip coating technique in a hydrothermal sol-gel system and subjected to a heat treatment. Characterization of the film electrode by XRD, AFM, BET, LSV and MPA methods revealed the occurence of anatase form and about 10 nm in crystallite size; having three dimensional profile and roughness with height of typically 10 nm; and surface area of 58 m2/g. The film was then employed as a working electrode in a photo electrochemical system (PES). This PES generated a photocurrent that was proportional to the organic chemical concentration in the water sample. Integration of the photocurrent versus time gives a charge (Q) that represents the event of complete mineralization of organic chemical in the TiO2 surface and can be correlated to the COD of measured water. This system has a potential to be develop as a novel COD sensor.

Biography :

Email: mnurdin06@yahoo.com