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以碳纳米管为模板,采用溶胶-凝胶法合成了碳纳米管(CNT)/ZnO纳米复合材料,用XRD、TEM、IR和EDS对产物进行了表征,研究了用该材料制成的气敏元件在室温下对NH3的气敏性。结果表明,产物是由ZnO均匀包裹在碳纳米管上构成的一种纳米复合材料,管径约50~60nm。这种复合材料可大大降低元件的阻值,提高元件的灵敏度。当碳纳米管加入量为60%[与Zn(CH3COO)2.2H2O的摩尔比]时,元件灵敏度最大,且灵敏度随NH3浓度的增大而增大,NH2从100ppm(10-6)以后,灵敏度变化平缓。
Carbon nanotubes (CNTs) / ZnO nanocomposites were synthesized by sol-gel method using carbon nanotubes as templates. The products were characterized by XRD, TEM, IR and EDS. The effects of gas Gas sensing element sensitivity to NH3 at room temperature. The results show that the product is a nanocomposite composed of ZnO uniformly wrapped on carbon nanotubes with a diameter of about 50-60 nm. This composite material can greatly reduce the resistance of the components and improve the sensitivity of the components. When the amount of carbon nanotubes added is 60% [molar ratio with Zn (CH3COO) 2.2H2O], the sensitivity of the device is the highest and the sensitivity increases with increasing NH3 concentration. After the NH2 concentration reaches 100ppm (10-6), the sensitivity Change is gentle.