Zr_3Al_3C_5的酸碱刻蚀及其电极反应的研究
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摘要
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,Zr H2,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_3Al_3C_5 ceramic. Two-dimensional Zr3 C2 crystals were prepared by etching HCl + KF and KOH + KF on Zr_3Al_3C_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_3Al_3C_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_3Al_3C_5.
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,Zr H2,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_3Al_3C_5 ceramic. Two-dimensional Zr3 C2 crystals were prepared by etching HCl + KF and KOH + KF on Zr_3Al_3C_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_3Al_3C_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_3Al_3C_5.
引文
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[4]Varoon K,Zhang X,Elyassi B,et al.Dispersible exfoliated zeolite nanosheets and their application as a selective membrane[J].Science,2011,334(6052):72-75.
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[6]Naguib M,Kurtoglu M,Presser V,et al.Two-dimensional nanocrystals produced by exfoliation of Ti3Al C2[J].Advanced Materials,2011,23(37):4248-4253.
[7]Naguib M,Halim J,Lu J,et al.New Two-Dimensional Niobium and Vanadium Carbides as Promising Materials for Li-ion Batteries[J].J.Am.Chem.Soc.,2013,135(43):15966-15969.
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[9]Gao Y,Wang L,Zhou A,et al.Hydrothermal synthesis of Ti O2/Ti3C2nanocomposites with enhanced photocatalytic activity[J].Materials Letters,2015,150:62-64.
[10]Naguib M,Mochalin V N,Barsoum M W,et al.25th Anniversary Article:MXenes:A New Family of Two Dimensional Materials[J].Advanced Materials,2014,26(7):992-1005.
[11]Xie J,Wang X,Li A,et al.Corrosion behavior of selected Mn+1AXnphases in hot concentrated HCl solution:effect of A element and MX layer[J].Corrosion Science,2012,60:129-135.
[12]Murat Naguib M,Mochalin V N,Barsoum M W,et al.Structural,Electronic Properties and Stability of MXenes Ti2C and Ti3C2Functionalized by Methoxy Groups[J].J.Phys.Chem.C,2013,117(26):13637-13643.
[13]Srivastava P,Mishra A,Mizuseki H,et al.Mechanistic Insight into the Chemical Exfoliation and Functionalization of Ti3C2MXene[J].ACS Appl.Mater.Interfaces,2016,(8):24256-24264.
[14]Chen Yang,Songzhe Jin,Baoyan Liang,et al.Synthesis of Ti3Al C2by spark plasma sintering of mechanically milled 3Ti/x Al/2C powder mixtures[J].Journal of Alloys and Compounds,472,(2009):79-83.
[15]Ling Z,Ren C E,Zhao M Q,et al.Flexible and conductive MXene films and nanocomposites with high capacitance[J].Proc Natl Acad Sci U S A,2014,111(47):16676-16681.
[16]Ghidiu M,Lukatskaya M R,Zha O M Q,et al.Conductive two dimensional titanium carbide'clay'with high volumetric capacitance[J].Nature,2014,516(7529):78-81.
[17]Zhou J,Zha X H,Fan Y,et al.A Two-Dimensional Zirconium Carbide by Selective Etching of Al3C3from Nanolaminated Zr3Al3C5[J].Angewandte Chemie,