研究目的
Investigating the gas-sensing properties of a novel organic-inorganic layered perovskite (C4H9NH3)2PbI4 towards p-xylene at low temperature.
研究成果
The (C4H9NH3)2PbI4 sensor exhibits excellent gas-sensing properties towards p-xylene at a low operating temperature of 140 °C, with high response, fast response-recovery, and good selectivity. The sensing mechanism is attributed to physical adsorption, distinguishing it from metal oxide-based sensors.
研究不足
The specific surface area of (C4H9NH3)2PbI4 is below 1 m2/g, which may limit its gas-sensing performance. The study focuses on p-xylene, and the sensor's performance towards other gases is not extensively explored.
1：Experimental Design and Method Selection:
The study involved the synthesis of (C4H9NH3)2PbI4 through a simple and high-yield solution method and its application as a gas sensor material for the first time.
2：Sample Selection and Data Sources:
The material was characterized using XRD, FTIR, SEM, UV-Vis, and PL to confirm its synthesis and properties.
3：List of Experimental Equipment and Materials:
Equipment included a Rigaku D/Max-2500 diffractometer, JEOL JSM-6700F FE-SEM, Shimadzu UV-3600 UV-vis-NIR spectrophotometer, Hitachi F-7000 FL spectrophotometer, and Nicolet 380 FTIR Spectrometer.
4：Experimental Procedures and Operational Workflow:
The sensor was fabricated by coating the perovskite onto an alumina tube with Au electrodes and Pt wires, aged, and tested for gas-sensing properties.
5：Data Analysis Methods:
The response of the sensor to various gases was measured, and in situ DRFTIR was used to study the gas-sensing mechanism.
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