用于增强乙醇气体传感的电纺ZnO-NiO纳米纤维的构建

Construction of Electrospun ZnO-NiO Nanofibers for Enhanced Ethanol Gas Sensing.

作者信息

Bonyani Maryam, Zebarjad Seyed Mojtaba, Kim Tae-Un, Kim Hyoun Woo, Kim Sang Sub

机构信息

Department of Materials Science and Engineering, Shiraz University, Shiraz 71454, Iran.

Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea.

出版信息

Sensors (Basel). 2024 Nov 22;24(23):7450. doi: 10.3390/s24237450.

DOI:10.3390/s24237450

PMID:39685987

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11644565/

Abstract

Semiconducting metal oxides with nanofiber (NF) morphologies are among the most promising materials for the realization of gas sensors. In this study, we have prepared electrospun ZnO-NiO composite NFs with different amounts of NiO (0, 20, 40, 60 and 80% wt%) for the systematic study of ethanol gas sensing. The fabricated composite NFs were annealed at 600 °C for crystallization. Based on characterization studies, NFs were produced with desired morphologies, phases, and chemical compositions. Ethanol gas sensing studies revealed that the sensor with 40 wt% NiO had the highest response (3.6 to 10 ppm ethanol) at 300 °C among all gas sensors. The enhanced gas response was ascribed to the formation of sufficient amounts of p-n NiO-ZnO heterojunctions, NFs' high surface areas due to their one-dimensional morphologies, and acid-base interactions between ZnO and ethanol. This research highlights the need for the optimization of ZnO-NiO composite NFs so that they achieve the highest sensing response, which can be extended to other similar metal oxides.

摘要

具有纳米纤维（NF）形态的半导体金属氧化物是实现气体传感器最有前景的材料之一。在本研究中，我们制备了具有不同NiO含量（0、20、40、60和80 wt%）的电纺ZnO-NiO复合纳米纤维，用于系统研究乙醇气体传感。制备的复合纳米纤维在600°C下退火以结晶。基于表征研究，制备出了具有所需形态、相和化学成分的纳米纤维。乙醇气体传感研究表明，在所有气体传感器中，含40 wt% NiO的传感器在300°C下对10 ppm乙醇的响应最高（为3.6）。气体响应增强归因于形成了足够数量的p-n NiO-ZnO异质结、纳米纤维由于其一维形态而具有的高表面积以及ZnO与乙醇之间的酸碱相互作用。本研究强调了优化ZnO-NiO复合纳米纤维的必要性，以便它们实现最高的传感响应，这一方法可扩展到其他类似的金属氧化物。