Boosting Ethylene Glycol Sensing Performance with Dendritic Hierarchical CuO/Co3O4 Heterojunction Nanowire

作者：Su, Chen; Li, Mingyu; Zhang, Yongfeng; Liu, Tianqing; Ren, Cong; Li, Peipei; Yin, Xiaoqiang; Zhang, Lu^*; Zhang, Min^*; Wu, Weiwei^*

来源：ACS Applied Nano Materials, 2023, 6(20): 19249-19256.

DOI：10.1021/acsanm.3c03690

• hierarchical nanostructure
• CuO/Co3O4 nanomaterial
• heterojunction
• ethyleneglycol
• gas sensor

Heterostructures comprising metal oxide semiconductors (MOSs) have proven to be effective techniques in the development of high-performance gas sensors. In this study, we developed a feasible hydrothermal technique for the synthesis of a hierarchical dendritic CuO/Co(3)O(4 )nanowire heterostructure, which exhibits a strong affinity for ethylene glycol (EG) adsorption. The resulting gas sensor, based on a hierarchical CuO/Co3O4 heterostructure, has an exceptionally high response (6.3) to 100 ppm EG at 130 C-degrees. The enhanced sensing performance toward EG can be attributed to the formation of a unique CuO/Co3O4 core-shell heterojunction structure. The mechanism behind this enhanced performance is explained by the heterojunction-depletion model, which takes into account precise band alignments. This study serves as inspiration for the design of various p-p heterojunctions in the development of high-performance gas sensors. A feasible hydrothermal technique was developed for obtaining a hierarchical dendritic CuO/Co3O4 nanowire heterostructure with high EG gas sensing performance.

• 单位
  西安电子科技大学