采用两步法制备ZnO/聚噻吩(ZnO/PTh)复合材料,首先制备富含氧空位缺陷的ZnO,然后以此为载体,通过噻吩单体的原位聚合得到最终产物。通过X射线衍射、场发射扫描电镜、高分辨透射电镜、红外光谱、紫外-可见漫反射光谱和荧光光谱对合成材料进行表征,研究了其紫外激发室温气敏性能,分析了紫外激发气敏机理。结果表明:紫外光激发下复合材料室温下对乙醇有较高的灵敏度,对100×10-6乙醇的灵敏度达到12.6,响应和恢复时间均在40s以内。
ZnO/PTh composites were synthesized by two-step method including the synthesis of oxygen vacancy-controlled ZnO and the in-situ chemical oxidative polymerization of thiophene.The materials were studied by X-ray power diffraction,field emission scanning electron microscopy,high-resolution transmission electron microscopy,fourier transform Infrared spectrometer,UV-Vis diffuse reflectance and photoluminescence.The UV light enhanced gas-sensing properties of the as-prepared composites were investigated,and the gas sensing mechanism of composites was also proposed.The results shown that the gas sensor based on ZnO/PTh showed high sensitivity towards ethanol under the irradiation of UV light at room temperature.The sensitivity to 100×10-6 ethanol can reach 12.6 at the room temperature,the response and recovery time were both within 40 s.
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基金资助
国家自然科学基金(21606211);河南省研究生教育优质课程(YXW2018D23HFJ03013);河南省高等学校重点科研项目(18B430017);郑州轻工业大学2017年博士科研基金(2017BSJJ034)
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