Organic-Base-Driven Intercalation and Delamination for the Production of Functionalized Titanium Carbide Nanosheets with Superior Photothermal Therapeutic Performance

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• 作者：Jinnan Xuan ; Zhiqiang Wang ; Yuyan Chen ; Dujuan Liang ; Liang Cheng ; Xiaojing Yang ; Zhuang Liu ; Renzhi Ma ; Takayoshi Sasaki and Fengxia Geng
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：November 14, 2016
• 年：2016
• 卷：55
• 期：47
• 页码：14569-14574
• 全文大小：2616K
• ISSN：1521-3773

文摘

The delamination of titanium carbide sheets, an intriguing class of two-dimensional materials, has been critically dependent on the extraction of interlayer Al in acidic media, such as concentrated hydrofluoric acid (HF) or a mixture of hydrochloric acid (HCl) and a fluoride salt. Herein, we report an organic-base-driven intercalation and delamination of titanium carbide that takes advantage of the amphoteric nature of interlayer Al. The resulting aluminum-oxoanion-functionalized titanium carbide sheets manifested unusually strong optical absorption in the near-infrared (NIR) region with a mass extinction coefficient as high as 29.1 L g⁻¹ cm⁻¹ at 808 nm. Thus, the performance of this material is comparable or even superior to that of state-of-the-art photoabsorption materials, including gold-based nanostructures, carbon-based materials, and transition-metal dichalcogenides. Preliminary studies show that the titanium carbide sheets serve as efficient photothermal agents against tumor cells.