4.8 Article

Algae Extraction Controllable Delamination of Vanadium Carbide Nanosheets with Enhanced Near-Infrared Photothermal Performance

Journal

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 16, Pages 6601-6606

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201916748

Keywords

algae extraction; cancer; exfoliation; MXene; photothermal therapy

Funding

  1. National Natural Science Foundation of China [21874008, 21727815, 91954001, 21890742, 20180740]
  2. Fundamental Research Funds for the Central Universities [FRF-TP-18-007B1]
  3. Beijing Municipal Science and Technology Commission [z131102002813058]

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The two-dimensional (2D) vanadium carbide (V2C) MXene has shown great potential as a photothermal agent (PTA) for photothermal therapy (PTT). However, the use of V2C in PTT is limited by the harsh synthesis condition and low photothermal conversion efficiency (PTCE). Herein, we report a completely different green delamination method using algae extraction to intercalate and delaminate V2AlC to produce mass V2C nanosheets (NSs) with a high yield (90 %). The resulting V2C NSs demonstrated good structural integrity and remarkably high absorption in near infrared (NIR) region with a PTCE as high as 48 %. Systemic in vitro and in vivo studies demonstrate that the V2C NSs can serve as efficient PTA for photoacoustic (PA) and magnetic resonance imaging (MRI)-guided PTT of cancer. This work provides a cost-effective, environment-friendly, and high-yielding disassembly approach of MAX, opening a new avenue to develop MXenes with desirable properties for a myriad of applications.

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