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Abstract: Silver-doped LaFeO3 molecularly imprinted polymers (SLMIPs) were synthesized by a sol gel method combined with molecularly imprinted technology (MIT) as precursors. The precursors were then used to prepare SLMIPs cage (SLM-cage) and SLMIPs core-shell (SLM-core-shell) structures by using a carbon sphere as template and hydrothermal synthesis, respectively. The structures, morphologies, and surface areas of these materials were determined, as well as their gas-sensing properties and related mechanisms. The SLM-cage and SLM-core-shell samples exhibited good responses to methanol gas, with excellent selectivity. The response and optimum working temperature respectively are 16.98 and 215 °C, 33.7 and 195 °C, respectively, with corresponding response and recovery times of 45 s and 50 s (SLM-cage) and 42 s and 57 s (SLM-core-shell) for 5 ppm methanol gas. Notably, the SLM-cage and SLM-core-shell samples exhibited lower responses (£ 5 and £ 7, respectively) to other gases, including ethanol, ammonia, benzene, acetone, and toluene. Thus, these materials show potential as practical methanol detectors
Template and target information: methanol