Mg/CuO纳米复合薄膜在甲醇蒸气中可控的气敏性
Controllable gas sensitivity of Mg/CuO nanocomposite films measured in methanol vapor
AI总结：
本研究通过调控Mg/CuO纳米复合薄膜中Mg含量，实现了对甲醇蒸气气敏性的可控调节，其中10%Mg样品响应最快，气敏性随Mg含量增加而降低。
摘要：
研究了以不同Mg:CuO质量比表征的Mg/CuO纳米复合薄膜在暴露于1000 ppm甲醇蒸气时的气敏性。采用刮刀法在导电和非导电玻璃基底上制备薄膜。通过XRD和UV-Visible光谱进行结构和光学分析。XRD图谱有助于估算晶粒尺寸、位错密度和应变。样品的光学带隙由UV-Visible光谱确定。尽管纳米复合物中Mg浓度的变化导致晶粒尺寸、位错密度和应变发生变化，但未观察到带隙的明显移动。纳米复合物中Mg的质量百分比从10%逐步增加到20%，步长为5%。由于甲醇蒸气的吸附，样品的电阻率显著降低。气敏性表现出从纯CuO的3.79到含20%Mg的纳米复合物的1.23的变化范围。与纯CuO和其他纳米复合物相比，含10%Mg的样品对甲醇蒸气响应迅速。关键词：CuO，纳米复合物，气体传感器，XRD，UV-Visible光谱
英文摘要：
The gas sensitivity of Mg/CuO nanocomposite films, characterized by varying mass ratios of Mg:CuO, was assessed under exposure to 1000 ppm of methanol vapor. Films were fabricated by the doctor blade method on conductive and nonconductive glass substrates. Structural and optical analyses were conducted using XRD and UV-Visible spectrums. The XRD patterns facilitated the estimation of crystallite size, dislocation density and strain. The optical band gap of the samples was determined from UV-Visible spectrums. Despite variations in crystallite size, dislocation density and strain in response to changing Mg concentrations in nanocomposites, no discernible shift in the band gap was observed. The mass percentage of Mg in nanocomposite was incrementally altered from 10% to 20% in steps of 5%. Due to the adsorption of methanol vapor, the resistivity of the sample decreased significantly. Gas sensitivity exhibited variance ranging from 3.79 for pure CuO to 1.23 for nanocomposite with 20%Mg. The sample with 10%Mg quickly responded to methanol vapor compared to pure CuO and other nanocomposites. Keywords: CuO, nanocomposites, gas sensors, XRD, UV-Visible spectrums
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
