Zr_3Al_3C_5的酸碱刻蚀及其电极反应的研究

Study on Acid-base Etching and Electrode Reaction of Zr_3Al_3C_5

MAX是一种新型的三元结构陶瓷材料,但是,由于A与M之间键强比较弱,所以可以通过化学方法把A剥离出来,从而制备出一种类似于石墨烯的二维层状结构材料MXene。本实验以Zr H2、Al、C为原料,在高温真空管式炉中通入Ar并且在1500℃下烧结保温2 h,烧结制备出三元Zr_3Al_3C_5陶瓷。再通过HCl+KF与KOH+KF对Zr_3Al_3C_5的刻蚀制备出二维Zr3C2晶体,并且研究了温度、酸碱浓度对刻蚀结果的影响。弄清楚了碱对Zr_3Al_3C_5刻蚀的产物和其反应机制,还从电化学方面对其刻蚀产物和机制进行验证。研究表明,在刻蚀Zr_3Al_3C_5过程中,40%HF和刻蚀温度为60℃时,80℃和HCl 7.2 mol/L时,90℃和1 mol/L KOH时,刻蚀效果最好。

MAX is a new type of ternary structure ceramic material.However,due to the weak bonding strength between A and M,A can be chemically stripped out to prepare a two-dimensional layered structure similar to grapheme Material MXene.In this experiment,ZrH 2,Al and C were used as raw materials,and Ar was introduced into a high-temperature vacuum tube furnace and sintered at 1500℃for 2 h to prepare a ternary Zr 3 Al 3 C 5 ceramic.Two-dimensional Zr 3 C 2 crystals were prepared by etching HCl+KF and KOH+KF on Zr 3 Al 3 C 5,and the effects of temperature and acid-base concentration on the etching results were studied.The product of the etching of the base on Zr 3 Al 3 C 5 and its reaction mechanism was clarified,and the etching product and mechanism have also been verified electrochemically.The results show that the etching effect is best at 40℃and etching temperature of 60℃,80℃and HCl 7.2 mol/L,and 90℃and 1 mol/L KOH during the etching of Zr 3 Al 3 C 5.