Effective parameter of nano-CuO coating on CO gas-sensing performance and heat transfer efficiency

• Main Authors: Mahmood, Mahmood Hameed, Maleque, Md. Abdul
• Format: Article
• Language: English; English
• Published: Springer 2020
• Subjects: T11.95 Industrial directories; T173.2 Technological change; TN600 Metallurgy; TP200 Manufacture and use of chemicals; TS200 Metal manufactures. Metalworking
• Online Access: http://irep.iium.edu.my/85943/1/Paper%203%20Dr%20Mahmood%20Final.pdf; http://irep.iium.edu.my/85943/2/Acceptance%20Letter%20Paper%203.pdf; http://irep.iium.edu.my/85943/; https://www.springer.com/journal/13369/aims-and-scope
• Institution: Universiti Islam Antarabangsa Malaysia

The high gas-sensing performance of semiconductors is mainly due to its high surface-to-volume ratio as it permits a large exposed surface area for gas detection. This paper presents an evaluation study for the effects of Nano CuO coating parameters on the CO gas-sensing performance. The effects on gas sensing performance and heat trans-fer efficiency of CuO coating were evaluated by investigating the effects of coating parameters (concentration, temperature, and linear speed) on thickness, grain size, and porosity. CuO nano-particle coatings were synthesized using the oxidation method at various operating conditions. Coating characteristics were investigated using X-ray diffraction and Field Emission Scanning Electron Microscopy. Average coating thickness, grain size, and porosity were around 13 μm, 48 nm and 30% respectively. Thermal transfer and gas sensing properties of CuO coating were evaluated according to the total surface area of the coating formed at various operating conditions. The gas sensing and the thermal transfer performance were obtained from the optimization of coating parameters based on the coating morphology in order to achieve the highest contact surface area. The surface area of the coating was increased by around 350 times, which led to improve the heat transfer efficiency of 96.5 %. The result showed that the coating thickness increased with the increasing of solution concentration and decreasing of temperature. The results also showed that the sensitivity of the coating for CO gas was increased by 50 % due to the reduction of coatings grain size.