无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2021, Vol. 53 ›› Issue (12): 95-99.doi: 10.19964/j.issn.1006-4990.2021-0076

• 研究与开发 • 上一篇    下一篇

熔盐辅助碳诱导Ti3AlC2分解制备碳化钛纳米片

张艳丽(),代振,牛东明,梁宝岩()   

  1. 中原工学院材料与化工学院,河南郑州 450007
  • 收稿日期:2021-04-26 出版日期:2021-12-10 发布日期:2021-12-16
  • 作者简介:张艳丽(1976— ),女,硕士研究生,高级实验师,研究方向为先进陶瓷的制备及表征;E-mail: zhangyanli2009@126.com
  • 基金资助:
    河南省高校省级大学生创新创业训练计划项目(S202010465023);国家自然科学基金项目(51864028);河南省高等学校重点科研项目(22B430035);河南省高校实验室工作研究会研究项目(ULAHN202115)

Preparation of TiC nanosheets by molten salt assisted carbon induced decomposition of Ti3AlC2

ZHANG Yanli(),DAI Zhen,NIU Dongming,LIANG Baoyan()   

  1. Materials and Chemical Engineering School,Zhongyuan University of Technology,Zhengzhou 450007,China
  • Received:2021-04-26 Published:2021-12-10 Online:2021-12-16

摘要:

二维过渡金属碳化物因其独特的性质而成为极具吸引力的纳米材料。以炭黑和Ti3AlC2粉体为原料,以期通过在熔盐环境下实现碳还原Ti3AlC2合成碳化钛(TiC)纳米片。研究结果表明,炭黑可以诱导Ti3AlC2分解,随着加热温度的升高,Ti3AlC2的分解程度逐渐加剧。Ti3AlC2在低温(1 000~1 100 ℃)下可以严重分解为Al、Ti、Ti2.9Al2.1和TiC,Al和Ti可与微量氧反应生成少量的TiO2和Al2O3,生成的TiC为纳米颗粒,而引入熔盐是确保TiC纳米片形成的必要条件。通过优化制备工艺得到合成高含量TiC纳米片的适宜条件:炭黑与Ti3AlC2物质的量比为1.05∶1,氯化钠与氯化钾的质量比为1∶1,盐的总质量与炭黑和Ti3AlC2混合物的质量比为2∶1;氩气保护,1 000 ℃保温2 h。通过熔盐热处理得到以TiC为主并含有少量Al2O3的试样。产物中TiC的形貌为细小的纳米片,厚度约为10 nm、长度约为170 nm。

关键词: 纳米片, 碳化钛, 炭黑, 熔盐合成

Abstract:

2D transition metal carbides are very attractive nanomaterials due to their unique properties.Using carbon black and Ti3AlC2 powder as raw materials,it was expected that Ti3AlC2 can be reduced by carbon in a molten salt environment to syn-thesize titanium carbide(TiC) nanosheets.The results showed that carbon black may induce the decomposition of Ti3AlC2 to syn-thesize TiC nanocrystals at low temperature.As the heating temperature increased,the degree of decomposition of Ti3AlC2 was gradually intensified.Ti3AlC2 could be seriously decomposed into Al,Ti,Ti2.9Al2.1 and TiC at low temperature(1 000~1 100 ℃).Al and Ti could react with trace oxygen to produce a small amount of TiO2 and Al2O3.The generated TiC was nano-particle.The introduction of molten salt was a necessary condition to ensure the formation of TiC nanosheets.By optimizing the preparation process,the most suitable conditions for the synthesis of high content TiC nanosheets were obtained.The molar ra-tio of carbon black to Ti3AlC2 was 1.05∶1,and the mass ratio of NaCl to KCl was 1∶1.The mass ratio of the total salt to the mix-ture of carbon black and Ti3AlC2 was 2∶1.The mixed powders were put into the tubular furnace under the protection of Ar.After holding at 1 000 ℃ for 2 h,the samples with TiC as the main component were obtained by molten salt heat treatment.The morphology of TiC was fine nanosheets with thickness of about 10 nm and length of about 170 nm.

Key words: nanosheets, TiC, carbon black, molten salt synthesis

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