Carbon Dioxide Gas Sensor Based on the LaCoO3/MXene Heterojunction
Source abstract
Abstract
Carbon dioxide is one of the typical gases of a lithium battery thermal runaway. In this paper, lanthanum cobaltate (LaCoO 3 ) nanospheres were successfully synthesized by hydrothermal synthesis route, sheet structure MXene nanomaterials were prepared by lithium fluoride (LiF) and hydrochloric acid (HCl) etching aluminum titanium-carbide (Ti 3 AlC 2 ), and a CO 2 sensor assembled by a LaCoO 3 /MXene nanocomposite was successfully constructed. The nanocomposite was observed and characterized by SEM, TEM, XRD, and XPS, and the gas sensitivity of the composite sensitive material and the single sensitive material to CO 2 was systematically compared. The results show that the response of a LaCoO 3 /MXene nanocomposite sensor to 800 ppm of CO 2 reaches 50.47% at the optimum operating temperature of 60 °C, which is 2.94 times higher than that of a pristine LaCoO 3 sensor (17.16%). In addition, the LaCoO 3 /MXene sensors demonstrate low detection limits (50 ppm), short response/recovery times (14/32 s@ 800 ppm), and good long-term stability. The gas sensing properties of the composite may be due to the Schottky heterojunction formed between the LaCoO 3 nanospheres and MXene. The results indicate that LaCoO 3 /MXene nanocomposites are potential CO 2 sensing materials at low operating temperatures.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: MXene and MAX Phase Materials · Gas Sensing Nanomaterials and Sensors · 2D Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Chemical Safety, College of Control Science and Engineering
China University of Petroleum (East China)
Funding
Natural Science Foundation of Qingdao Municipality · Taishan Scholar Project of Shandong Province · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Natural Science Foundation of Shandong Province · State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China) · State Key Laboratory of Chemical Safety, College of Control Science and Engineering, China University of Petroleum (East China)
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