Thermal stability of two-dimensional Ti2C nanosheets. Issue 2 (March 2015)

• Record Type: Journal Article
• Authors: Li, Jingxiao; Du, Yulei; Huo, Chengxue; Wang, Shun; Cui, Chong
• Is Part Of: Ceramics international. Volume 41:Issue 2(2015)Part A
• Page Start: 2631
• Page End: 2635
• Publication Date: 2015-03
• Subjects: Thermal stability -- Two-dimensional Ti2C -- Twinning transformation -- MXene -- MAX phases; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2014.10.070
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Two-dimensional Ti2 C nanosheets were prepared by exfoliation of Ti2 AlC powders in HF solution at room temperature. The thermal stability and structural changes during heating of the as-prepared Ti2 C nanosheets were studied. The graphene-like layered structure of the as-prepared Ti2 C nanosheets was confirmed by SEM, TEM and XRD. Crystal defects were discovered in the as-prepared Ti2 C nanosheets. TG–DSC analysis and EDX results suggest that the surface group OH and F could be eliminated by heat treatment. When heated to 500 K, anatase TiO2 forms in the Ti2 C nanosheets, which then transforms to rutile TiO2 at higher temperature. Twinning transformation induced by heat treatment is found in the as-prepared Ti2 C nanosheets, which can be attributed to the existence of stacking faults.