| Summary: | 碩士 === 靜宜大學 === 應用化學系 === 99 === This study will select the appropriate proportion of silver and tin oxide precursor to change its pH, and then to the relevant chemical reducing agents to restore, after the last treatment at high temperature to get a different set of nanocore-shell material (Ag@SnO2). In TPR, UV, TEM, FT-IR and EDX characterization, we learned of the nanocore-shell particles are coated with a successful formation and also know the relevant structural relations and reduction process, and in theoretical calculations also success calculate the gas adsorption are van der waals force, and the ethanol gas sensing signal is 5.29 and desorption time t90:90 (s) and tR90: 44 (s), although the formaldehyde sensitivity of the sensor is not the best, but the desorption time shortened, and the current literature in order to be in the high-temperature sensing element contrast, our sensor material is carried out at room temperature in various concentrations and have different sensing signal performance.
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