Sequential Superassembly of Nanofiber Arrays to Carbonaceous Ordered Mesoporous Nanowires and Their Heterostructure Membranes for Osmotic Energy Conversion
Sequential Superassembly of Nanofiber Arrays to Carbonaceous Ordered Mesoporous Nanowires and Their Heterostructure Membranes for Osmotic Energy Conversion
复制标题
纳米纤维阵列顺序超组装碳质有序介孔纳米线及其异质结构膜用于渗透能转换
DOI：
10.1021/jacs.1c00547
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发表时间：
2021-04-30
影响因子：
15
通讯作者：
Kong, Biao
中科院分区：
文献类型：
--
作者：
Xie, Lei;Zhou, Shan;Kong, Biao
从盐度梯度中捕获可持续能源，特别是使用可再生生物质衍生的功能材料，引起了人们的广泛关注。为了将渗透能转化为电能，人们开发了许多具有纳米流体通道的膜材料。然而，传统膜的成本高、制备工艺复杂、输出功率密度低仍然限制着其实际应用。在此，我们报告了通过简单直接的软模板水热碳化方法合成了高度灵活且机械坚固的基于纳米纤维阵列的碳质有序介孔纳米线（CMW）。这种顺序超组装策略在控制长宽比从约3到39的CMW尺寸方面表现出高产率和多功能性。此外，这些CMW可以用作在大孔氧化铝上构建功能杂化膜的新型结构单元。这种具有不对称几何形状和电荷极性的纳米流体膜表现出低电阻和高性能能量转换。这项工作为各种应用的 CMW 和功能异质结构膜的一锅制备开辟了一条基于溶液的途径。
The capture of sustainable energy from a salinity gradient, in particular, using renewable biomass-derived functional materials, has attracted significant attention. In order to convert osmotic energy to electricity, many membrane materials with nanofluidic channels have been developed. However, the high cost, complex preparation process, and low output power density still restrict the practical application of traditional membranes. Herein, we report the synthesis of highly flexible and mechanically robust nanofiber-arrays-based carbonaceous ordered mesoporous nanowires (CMWs) through a simple and straightforward soft-templating hydrothermal carbonization approach. This sequential superassembly strategy shows a high yield and great versatility in controlling the dimensions of CMWs with the aspect ratio changes from about 3 to 39. Furthermore, these CMWs can be used as novel building blocks to construct functional hybrid membranes on macroporous alumina. This nanofluidic membrane with asymmetric geometry and charge polarity exhibits low resistance and high-performance energy conversion. This work opens a solution-based route for the one-pot preparation of CMWs and functional heterostructure membranes for various applications.