Highly Efficiently Delaminated Single-Layered MXene Nanosheets with Large Lateral Size

作者：Gengnan Li, Li Tan, Yumeng Zhang, Binghan Wu, Liang Li · 发表于：Langmuir · 年份：2017 · DOI：10.1021/acs.langmuir.7b01339 · 被引用次数：331 · 研究领域：MXene and MAX Phase Materials、2D Materials and Applications、Advanced Photocatalysis Techniques

Single layered Ti 3 C 2 (OH) 2 nanosheets have been successfully fabricated by etching its Ti 3 AlC 2 precursor with KOH in the presence of a small amount of water. The OH group replaced the Al layer within the Ti 3 AlC 2 structure during etching, and Ti 3 C 2 (OH) 2 nanosheets could be easily and efficiently achieved through a simple washing process. The delaminated single-layered nanosheets are clearly revealed by atomic force microscopy to be several micrometers in lateral size. Interestingly, the exfoliated Ti 3 C 2 (OH) 2 nanosheets could be restacked to form a new layer-structured material after drying. When redispersing this restacked Ti 3 C 2 (OH) 2 materials in water again, it could be re-delaminated easily only after shaking for several hours. The easy delamination and restacking properties, coupled with intrinsic metallic conductivity and hydrophilicity, make it an ideal two-dimensional building block for fabricating a wide variety of functional materials.