Jun Xiong,Lei Yang,Yanhong Chao,Jingyu Pang,Ming Zhang,Wenshuai Zhu,Huaming Li
Novel BN mesoporous nanowire materials with doped oxygen atoms have been controlled and prepared successfully. Multiple techniques have been employed to determine the structure, morphology, surface feature, defects, and electronic structure. It was the first time that a controlled preparation of this unique structure was applied to adsorptive desulfurization. The obtained BN mesoporous nanowires displayed outstanding adsorptive desulfurization activity for DBT (65.4 mg S g–1 adsorbent according to the Langmuir isotherm model), which was much higher than that of commercial BN and graphene-like BN. At the same time, the BN mesoporous nanowires displayed good stability and excellent adsorption performance for the 4,6-DMDBT (33.2 mg S g–1 adsorbent). The significant enhancement of adsorption desulfurization performance of BN mesoporous nanowires was ascribed to the large number of low coordinated atoms along the nanowire surface and mesopores, which could cause an interaction with DBT, and the doped oxygen atoms further strengthen the interaction.
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.
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