School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
Chemosphere. 2023 Mar;317:137827. doi: 10.1016/j.chemosphere.2023.137827. Epub 2023 Jan 13.
Considering that HS is a hazardous gas that poses a significant risk to people's lives, research into HS gas sensors has garnered a lot of interest. This work reports a CuO/ZnO multifaceted nanostructures(NS) created by heat treating Cu/ZIF-8 impregnation precursors, and their microstructure and gas sensing characteristics were examined using various characterization techniques (XRD, XPS, SEM, TEM, and BET). The as-prepared hollow CuO/ZnO multifunctional nanostructures had a high gas response value (425@50 ppm HS gas), quick response and recovery times (57/191s @20 ppm), a low limit of detection (1.6@500 ppb HS), good humidity resistance and highly selective towards HS gas. The hollow CuO/ZnO multifaceted nanostructures possessed enhanced gas sensing capabilities which may be related to their porous hollow nanostructures, the manufactured p-CuO/n-ZnO heterojunctions, and the spillover effect between CuO and HS.
考虑到 HS 是一种对人体生命健康有严重威胁的有害气体，因此对 HS 气体传感器的研究引起了广泛关注。本工作报道了一种通过热处理 Cu/ZIF-8 浸渍前体制备的 CuO/ZnO 多面纳米结构（NS），并采用多种表征技术（XRD、XPS、SEM、TEM 和 BET）对其微结构和气体传感特性进行了研究。所制备的中空 CuO/ZnO 多功能纳米结构具有较高的气体响应值（425@50 ppm HS 气体）、快速的响应和恢复时间（57/191s @20 ppm）、较低的检测限（1.6@500 ppb HS）、良好的抗湿度性和对 HS 气体的高选择性。中空 CuO/ZnO 多面纳米结构具有增强的气体传感性能，这可能与其多孔中空纳米结构、制造的 p-CuO/n-ZnO 异质结以及 CuO 和 HS 之间的溢出效应有关。
