Fan Baomin, Zhao Xiaoqi, Zhang Peng, Wei Yi, Qiao Ning, Yang Biao, Soomro Razium A, Zhang Ran, Xu Bin
College of Chemical and Materials Engineering, Beijing Technology and Business University, Beijing, 100048, China.
State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, China.
Adv Sci (Weinh). 2023 Aug;10(24):e2300273. doi: 10.1002/advs.202300273. Epub 2023 Jun 22.
MXenes suffer from severe oxidation and progressive degradation in aqueous media due to its poor chemical stability. Herein, sodium dodecyl sulfate (SDS) is employed as an efficient protectant for long-term storage of Ti C T -MXene aqueous dispersion. Experimental data support SDS's capability to protect oxidation-prone sites on Ti C T nanosheets, providing extended colloidal stability of up to 213 days. Concentration-dependent anti-oxidation effect articulates that 1.5 mg mL is deemed as an ideal SDS dose for Ti C T to achieve optimal oxidation-resistance in aqueous solution. Additionally, a chroma strategy is developed to instantly and precisely measure the oxidation degree of Ti C T . Adsorption-driven anti-oxidation efficacy of SDS is further confirmed by optimized conformations with interaction energies of SDS on termination-free and surface-defective Ti C T through multiscale simulations. This proposed route is a step forward in broadening the horizons of experimental and theoretical investigations of MXenes with promising implications for long-term storage and reliable applications.
由于化学稳定性差，MXenes在水性介质中会发生严重氧化和逐步降解。在此，十二烷基硫酸钠（SDS）被用作一种有效的保护剂，用于Ti C T -MXene水性分散体的长期储存。实验数据支持SDS保护Ti C T纳米片上易氧化位点的能力，可提供长达213天的延长胶体稳定性。浓度依赖性抗氧化作用表明，1.5 mg/mL被认为是Ti C T在水溶液中实现最佳抗氧化性能的理想SDS剂量。此外，还开发了一种色度策略，用于即时和精确测量Ti C T的氧化程度。通过多尺度模拟，SDS在无终端和表面缺陷的Ti C T上的相互作用能优化构象进一步证实了SDS的吸附驱动抗氧化效果。这一提出的途径在拓宽MXenes的实验和理论研究视野方面向前迈进了一步，对长期储存和可靠应用具有重要意义。
