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3D assembly of Ti3C2-MXene directed by water/oil interfaces†
Nanoscale ( IF 5.8 ) Pub Date : 2018-01-02 00:00:00 , DOI: 10.1039/c7nr07346a Renji Bian 1, 2, 3, 4, 5 , Ruizhi Lin 1, 2, 3, 4, 5 , Guilin Wang 1, 2, 3, 4, 5 , Gang Lu 1, 2, 3, 4, 5 , Weiqiang Zhi 3, 5, 6, 7 , Shanglin Xiang 3, 5, 6, 7 , Tingwei Wang 3, 5, 6, 7 , Paul S. Clegg 8, 9, 10, 11 , Dongyu Cai 1, 2, 3, 4, 5 , Wei Huang 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2018-01-02 00:00:00 , DOI: 10.1039/c7nr07346a Renji Bian 1, 2, 3, 4, 5 , Ruizhi Lin 1, 2, 3, 4, 5 , Guilin Wang 1, 2, 3, 4, 5 , Gang Lu 1, 2, 3, 4, 5 , Weiqiang Zhi 3, 5, 6, 7 , Shanglin Xiang 3, 5, 6, 7 , Tingwei Wang 3, 5, 6, 7 , Paul S. Clegg 8, 9, 10, 11 , Dongyu Cai 1, 2, 3, 4, 5 , Wei Huang 1, 2, 3, 4, 5
Affiliation
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MXene is an emerging class of 2D materials exfoliated from ternary carbide and nitride ceramics. The exfoliation process, which is an acid etching approach, functionalizes the MXene surface with –OH, –O and –F groups. These functional groups offer significant opportunities for tuning the colloidal properties of the MXene nanoblocks; importantly, this tunability points the way towards a facile route for assembling these nanoblocks into 3D architectures that are in demand for many applications. This route, presented for the first time here, uses water/oil interfaces for assembling Ti3C2-MXene in 3D architectures. It shows that cetyl trimethylammonium bromide (CTAB) can be used to tune the hydrophilic–hydrophobic balance of Ti3C2-MXene via the interaction of positively charged –N(CH3)3 and –O groups on the MXene surface. Crucially, it is found that this interaction can be controlled via the hydrogen ion concentration in the aqueous phase. Stable oil-in-water emulsions are the only product when the aqueous phase is neutral or basic. This understanding led us to fabricate a high internal phase Pickering emulsion with more than 70 vol% oil droplets and also a solid porous monolith based on this emulsion template.
中文翻译：
由水/油界面引导 的Ti 3 C 2 -MXene的3D组装†
MXene是一类新兴的2D材料，由三元碳化物和氮化物陶瓷剥离而成。剥落过程是一种酸蚀方法，可通过-OH，-O和-F基团功能化MXene表面。这些官能团为调节MXene纳米嵌段的胶体性质提供了重要的机会。重要的是，这种可调性为通往将这些纳米模块组装成3D架构的便捷途径指明了方向，而这些3D架构是许多应用程序所需要的。在此首次提出的此路线使用水/油界面在3D体系结构中组装Ti 3 C 2 -MXene。它表明，十六烷基三甲基溴化铵（CTAB）可用于调节Ti 3 C 2 -MXene的亲水-疏水平衡通过MXene表面上带正电的–N（CH 3）3和–O基团的相互作用。至关重要的是，发现这种相互作用可以通过水相中的氢离子浓度来控制。当水相为中性或碱性时，稳定的水包油乳液是唯一的产品。这种理解使我们能够制造出具有超过70％（体积）油滴的高内相Pickering乳液，以及基于该乳液模板的固体多孔整料。
更新日期：2018-01-02
中文翻译：
由水/油界面引导 的Ti 3 C 2 -MXene的3D组装†
MXene是一类新兴的2D材料，由三元碳化物和氮化物陶瓷剥离而成。剥落过程是一种酸蚀方法，可通过-OH，-O和-F基团功能化MXene表面。这些官能团为调节MXene纳米嵌段的胶体性质提供了重要的机会。重要的是，这种可调性为通往将这些纳米模块组装成3D架构的便捷途径指明了方向，而这些3D架构是许多应用程序所需要的。在此首次提出的此路线使用水/油界面在3D体系结构中组装Ti 3 C 2 -MXene。它表明，十六烷基三甲基溴化铵（CTAB）可用于调节Ti 3 C 2 -MXene的亲水-疏水平衡通过MXene表面上带正电的–N（CH 3）3和–O基团的相互作用。至关重要的是，发现这种相互作用可以通过水相中的氢离子浓度来控制。当水相为中性或碱性时，稳定的水包油乳液是唯一的产品。这种理解使我们能够制造出具有超过70％（体积）油滴的高内相Pickering乳液，以及基于该乳液模板的固体多孔整料。
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