4.6 Article

Design of p-n heterojunction on mesoporous ZnO/Co3O4 nanosheets for triethylamine sensor

期刊

CHEMICAL PHYSICS LETTERS
卷 779, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.cplett.2021.138891

关键词

ZnO; Co2O4 heterojunction; Mesoporous nanosheets; Gas sensor

资金

  1. National Natural Science Foundation of China [21771166, U1704256]
  2. Center Plain Science and Technology Innovation Talents [194200510013]

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ZnO/Co3O4 porous nanosheets were successfully developed via adjusting proportions in p-n heterojunction composites and applied in sensors to detect triethylamine. The sensors exhibited high response values to triethylamine, even in high humidity conditions. This work offers a strategy for quick detection of triethylamine using p-n heterojunction ZnO/Co3O4 sensors.
ZnO/Co3O4 porous nanosheets were successfully developed via modulating the proportions in p-n heterojunction composites by a hydrothermal method. The as-synthesized materials were applied to fabricate sensors to study their gas sensing performance. The response value (S = Ra/Rg) of the ZnO/Co3O4 sensor is calculated to be 67.8 for 50 ppm triethylamine, which is much better than that of as-prepared pristine ZnO. Interestingly, the ZnO/ Co3O4 sensor also exhibits a high response to triethylamine even in high humidity (77%). Our work provides a strategy to fast probe triethylamine via design of p-n heterojunction ZnO/Co3O4 sensors.

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