Ultra-sensitive agricultural gas sensor was successfully developed

The porous indium oxide micron-flower-like composite structure enables ultra-sensitive and ultra-stable detection of room temperature for agricultural gases. Courtesy of the Chinese Academy of Agricultural Sciences

A large amount of nitrogen-containing and carbon pollution gases released in the process of agricultural production affect the sustainable development of agriculture and threaten the ecological environment and human health. The complex environment of high humidity and changeability in agriculture puts forward higher requirements for the sensitivity, response speed and stability of chemical sensors.

Recently, the innovation team of agricultural and rural resource digital management of the Institute of Agricultural Information of the Chinese Academy of Agricultural Sciences found that the sensitivity, selectivity and stability of sensitive materials in the complex environment of agriculture can be improved through structural regulation and orderly recombination of nanomaterials. The results were published in the Journal of Hazardous Materials.

The researchers synthesized the three-dimensional micron flower-like hierarchical structure of indium oxide and molybdenum disulfide by hydrothermal method, and obtained the porous indium oxide micron-flower-like composite structure modified by electrostatic action of indium oxide nanosheets, and deposited it on the fork finger electrode structure.

The sensitive film of this composite structure exhibits ultrasensitivity, super stability and rapid response to nitrogen dioxide gas at room temperature. The microstructural characteristics, heterojunctive effects and synergistic effects of this composite structure together contribute to excellent sensitivity to gases.

This achievement provides a theoretical basis and a way to achieve the ultra-sensitivity and super stability of agricultural gas sensors in complex environments. The research has been funded by projects such as the National Natural Science Foundation of China. (Source: China Science Daily, Li Chen, Lei Jie)

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