Versatile MXene Gels Assisted by Brief and Low‑Strength CentrifugationOACSTPCDEI
Due to the mutual repulsion between their hydrophilic surface terminations and the high surface energy facilitating their ran-dom restacking,2D MXene nanosheets usually cannot self-assemble into 3D macroscopic gels with various applications in the absence of proper linking agents.In this work,a rapid spontaneous gelation of Ti3C2Tx MXene with a very low dispersion concentration of 0.5 mg mL^(-1) into multifunctional architectures under moderate centrifugation is illustrated.The as-prepared MXene gels exhibit reconfigurable internal structures and tunable rheological,tribological,electrochemical,infrared-emissive and photothermal-conversion properties based on the pH-induced changes in the surface chemistry of Ti_(3)C_(2)T_(x) nanosheets.By adopting a gel with optimized pH value,high lubrication,exceptional specific capacitances(~635 and~408 F g^(-1) at 5 and 100 mV s^(-1),respectively),long-term capacitance retention(~96.7%after 10,000 cycles)and high-precision screen-or extrusion-printing into different high-resolution anticounterfeiting patterns can be achieved,thus displaying extensive potential applications in the fields of semi-solid lubrication,control-lable devices,supercapacitors,information encryption and infrared camouflaging.
Weiyan Yu;Yi Yang;Yunjing Wang;Lulin Hu;Jingcheng Hao;Lu Xu;Weimin Liu;
State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,People’s Republic of China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai,Yantai 264006,People’s Republic of ChinaShandong Laboratory of Advanced Materials and Green Manufacturing at Yantai,Yantai 264006,People’s Republic of ChinaShandong Laboratory of Advanced Materials and Green Manufacturing at Yantai,Yantai 264006,People’s Republic of China Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials,Shandong University,Jinan 250100,People’s Republic of China
化学工程
MXeneCentrifugation-assisted rapid gelationLubricationSupercapacitorAnti-counterfeiting applications
《Nano-Micro Letters》 2024 (005)
P.231-247 / 17
This work is financially supported by the Hundred Talents Program of Chinese Academy of Sciences(E30247YB);the Special Talents Program of Lanzhou Institute of Chemical Physics(E0SX0282);the National Natural Science Foundation of Shandong Province(ZR2022QB190);the Innovative Research Funds of Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai(E1R06SXM07,E1R06SXM09 and E2R06SXM14).
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