通过水热法和化学选择性刻蚀法分别制备一维氧化锌(ZnO)纳米线和二维层状碳化钛(Ti₃C₂T_x),采用静电自组装和双向冷冻干燥技术得到超轻少层碳化钛/氧化锌(f-Ti₃C₂T_x/ZnO)复合材料,并利用XRD、SEM、TEM等对样品进行结构和形貌表征。将f-Ti₃C₂T_x/ZnO复合材料制成气敏元件,考察其气敏性能,并与纯Ti₃C₂T_x进行比较。结果表明,200℃下,Ti₃C₂T_x质量分数为14%的复合材料对100 μL/L二氧化氮(NO₂)的响应值(S=R_g/R_a)达到30.31,相比纯Ti₃C₂T_x提高7.27倍。f-Ti₃C₂T_x/ZnO复合材料可用作检测NO₂气体的新型传感材料。

One-dimensional zinc oxide nanowire (ZnO) and two-dimensional layered titanium carbide (Ti₃C₂T_x) are prepared by hydrothermal method and chemical etching method,respectively.Ultralight few-layer titanium carbide/zinc oxide composite (f-Ti₃C₂T_x/ZnO) is prepared via electrostatic self-assembly and bidirectional freeze-drying technologies.The structure and morphology of the samples are characterized by mean of XRD,SEM and TEM.The obtained f-Ti₃C₂T_x/ZnO composite is made into a gas sensor,and its gas-sensing properties are investigated and compared with pure Ti₃C₂T_x.It is shown that the response value (S=Rg/Ra) of the composite with a Ti₃C₂T_x mass fraction of 14% to a 100 ppm nitrogen dioxide reaches 30.31 at 200℃,which is 8.27 times that of pure Ti₃C₂T_x.f-Ti₃C₂T_x/ZnO composite material can be used as a new sensing material for detecting NO₂ gas.

尹优优(1997-),女,硕士研究生,研究方向为纳米氧化物及MXene复合材料,y2724235726@163.com。