Study of Cu2O with Octahedral Structure and Metal Catalyst for Hydrogen Peroxide Sensor

• Main Authors: Wen-cherng Chern, 陳玟晟
• Other Authors: Feng-Renn Juang
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/3jb97j

碩士 === 國立中山大學 === 電機工程學系研究所 === 106 === In this study, we investigate different nanostructures of cuprous oxide (Cu2O) on ITO/glass substrate with silver catalyst for hydrogen peroxide (H2O2) sensors. We use sol-gel method to grow Cu2O nanoparticles. Different shapes of Cu2O morphology including cubic, truncated octahedron and octahedron are discussed for their effects to H2O2 sensing ability. The octahedral Cu2O nanoparticles are respectively combined with silver catalyst by photoelectrochemical, hydrothermal, settling, and ultrasonic assistance methods. Improvements of metal catalyst to H2O2 sensors are also analyzed. According to the results, the octahedral Cu2O nanoparticles have the best sensitivity of 28.0 μAmM-1cm-2. Octahedron has more reaction sites than other shapes. Besides, the higher chemical properties and conductivity of (111) plane make the sensor has higher sensitivity. However, although the truncated octahedron has a larger (111) plane than the cubic, the dense structure let it has the lowest sensitivity. Combination of silver catalyst by photoelectrochemical method has the highest sensitivity of 41.9 μAmM-1cm-2. Due to the octahedral nanostructure and metal catalyst, the sensitivity of the H2O2 sensor has improved 49%.