| Title |
Effects of precursor composition used in solution precursor plasma spray on the properties of ZnO coatings for CO2 and UV light sensing |
|
Authors |
Rolando T. Candidato, Jr., Jose Presiphil Ontolan Jr, Pablo Carpio, Lech Pawlowski and Reynaldo M. Vequizo |
|
Publication date |
2018/10/06 |
|
Journal |
SURFACE AND COATINGS TECHNOLOGY |
| Volume |
371 |
| Pages |
6 |
| Publisher |
Elsevier |
| Abstract |
The potential of finely-structured zinc oxide (ZnO) coatings developed via solution precursor plasma spraying
(SPPS) as CO2 gas and UV light sensor was explored in this work. The coatings were deposited on stainless steel
substrates using aqueous solutions of zinc nitrate and zinc acetate as precursors. The coatings' microstructures
were studied in relation to the solution precursors used. Relatively porous coatings were obtained when using
acetate as starting precursor compared to the coatings from the nitrate precursor. This was attributed to the
different chemical routes of ZnO formation for each precursor droplet upon contact with plasma jet. Phase
analysis confirmed the formation of polycrystalline ZnO having wurtzite structure from both precursors. The
sprayed ZnO coatings showed good sensitivity and recovery towards UV light. Moreover, the coatings were
sensitive towards carbon dioxide (CO2) analyte gas but did not show any good recovery which was attributed to
the microstructure of the coatings. These results showed the feasibility of SPPS process for the fabrication of
finely-structured ZnO coatings as sensors of CO2 gas and UV light. |
| Index terms / Keywords |
CO2 gas sensor, UV sensor, Sensitivity, SPPS, ZnO coatings |
| DOI |
|
Mindanao State
University - Iligan Institute of Technology