P1NM.8 - Ultrasensitive RGO/Cu2O film synthetized by hydrothermal method to detect NO2 gas at room temperature
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- P-1 - Nanomaterials
- Author(s)
- X. Zhu, Y. Guo, Y. Zhou - Key Laboratory of Optoelectronic Technology and Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing (China)
- Pages
- 594 - 594
- DOI
- 10.5162/IMCS2018/P1NM.8
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
Advancing researches had been focused on incorporating RGO with metal oxidize to improve the gassensing sensitivity. In this paper, a neural-like RGO/Cu2O composites was synthetized with a facile hydrothermal method. two crystalline morphology nanoparticles and nanowires existed as one integral morphology. The materialsʼ ultrasensitive property could achieve nearly 35 % at 50 ppb NO2 level at room temperature. Chemical reaction factors such as temperature, PH, ions concentration (reactant and reductant included) had been considered to influence morphologies and conductivities of products. Different characterization techniques, including TEM, FESEM, XRD, XPS, BET, Raman Spectrum, were employed to explore the sensing mechanism. In addition, gas sensing measurements of sensitivity, stability, repeatability and selectivity also be tested, which indicated the RGO/Cu2O composites an excellent candidate for trace NO2 detection with promising prospect.