Electrodeposition of Zinc Oxide (ZnO) for Carbon Monoxide (CO) sensing

Authors

Jeriel Lloyd Dayrit ⋅ PH Institute of Mathematical Sciences and Physics, University of the Philippines Los Baños
Emmanuel Florido ⋅ PH Institute of Mathematical Sciences and Physics, University of the Philippines Los Baños

Abstract

ZnO films were successfully fabricated through electrophoretic deposition. Six (6) samples were prepared with different applied voltages. Higher applied voltages resulted to higher mass of ZnO deposits and higher sensitivities at 26.5 ^oC. The fabricated samples were reversible and more sensitive at greater CO concentrations. Obtaining more mass of deposits and the exposure to higher CO concentration can lead to a better sensitivity because more ZnO particles and CO molecules can perform and contribute to gas sensing. SEM revealed that the most and least sensitive samples’ (6 and 1 respectively) deposits were porous. Sample 6 had higher gas response than sample 1 due to its smaller particle size and thicker layer of deposits. Porosity and the size reduction of ZnO particles can enhance its sensing properties due to an increase of surface to volume ratio which allows more particles to perform in bulk gas interaction.

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Issue

2012: Proceedings of the 30th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP2012-1B-4

Section

Condensed Matter Physics

Published

2012-10-22

How to Cite

[1]

JL Dayrit and E Florido, Electrodeposition of Zinc Oxide (ZnO) for Carbon Monoxide (CO) sensing, Proceedings of the Samahang Pisika ng Pilipinas 30, SPP2012-1B-4 (2012). URL: https://proceedings.spp-online.org/article/view/SPP2012-1B-4.