研究目的
Investigating the growth of polycrystalline, self-supporting ZnO nanofibres for ultra-sensitive NO2 gas sensing applications.
研究成果
Polycrystalline self-supporting ZnO nanofibres with nanograins of average diameter 8(±2) nm were successfully created using core-shell electrospinning. These nanofibres demonstrated high sensitivity to NO2 gas, with a detection limit of about 1 ppb. The method is scalable and can be applied to other metal precursor solutions, opening up new applications in sensing, energy storage, and wearable technologies.
研究不足
The study focuses on NO2 gas sensing and does not explore the sensitivity of the ZnO nanofibres to other gases. The fabrication process requires precise control of electrospinning parameters and calcination conditions.
1：Experimental Design and Method Selection:
Core-shell electrospinning was used to grow polycrystalline ZnO nanofibres. The method involves encapsulating a non-polymeric metal precursor solution into a polymer shell to suppress axisymmetric instabilities during electrospinning.
2：Sample Selection and Data Sources:
Zinc neodecanoate was used as the Zn precursor solution, and PVA was used as the shell polymer.
3：List of Experimental Equipment and Materials:
Custom made coaxial needles, mechanical dispensers, high-voltage low-current DC power supply, tube furnace, SEM, TEM, Raman spectrometer, Gas Sensor Testing System.
4：Experimental Procedures and Operational Workflow:
The Zn precursor and PVA solutions were co-electrospun, calcined at 500°C, and then characterized. Gas sensing experiments were performed using a Gas Sensor Testing System.
5：Data Analysis Methods:
The change in resistance of the ZnO nanofibre device was measured in the presence of NO2 gas to determine sensitivity and detection limits.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
