包亚莉,王 红,梁浩东,王晓燕
AuthorsHTML:包亚莉，王 红，梁浩东，王晓燕
AuthorsListE:Bao Yali,Wang Hong,Liang Haodong,Wang Xiaoyan
AuthorsHTMLE:Bao Yali，Wang Hong，Liang Haodong，Wang Xiaoyan
Unit:内蒙古工业大学化工学院，呼和浩特 010050
Unit_EngLish:Chemical Engineering College，Inner Mongolia University of Technology，Hohhot 010050，China

Abstract_Chinese:近年来，应用于多种领域的地质聚合物等硅基多孔材料引起广泛关注，其主要功能成分水化硅酸钙(CSH) 的结构对这类材料的性能起决定性作用．然而此类材料的低衍射特性导致其纳米结构研究及可控制备难度较大，现 有研究多集中于晶态硅酸钙的制备及应用．采用低温水热法制备了半晶态多孔型水化硅酸钙(PCS)，利用 XRD、FT\u0002IR、SEM、TEM、N2 吸附-脱附实验及 1H 核磁水分冻融(1 H NMR-C)等方法对该材料的组成及孔隙结构进行研究， 提出了多种表征手段结合的低衍射特性多孔材料微观孔隙结构的研究方法．结果表明：实验合成的多孔材料 PCS 为 半晶态 CSH(Ⅰ)，比表面积(SBET)可达 340.9 m2 /g．材料在合成过程中自然形成了特殊的外大内小的锥形孔及多级孔 结构．PCS 为薄片单元堆叠形成的蜂巢状多孔结构，具有孔隙发达、孔径呈多峰分布(大、中、微孔均有分布)和比 表面积大等特点．该材料的特殊结构使其有望在气体吸附及富集、废水处理、环境湿度调节等领域成为十分具有竞 争力的新型材料．
Abstract_English:Research on the emerging application of silicon-based porous materials such as geopolymers has attracted widespread attention in recent years. The structure of the most critical component，calcium silicate hydrate(CSH)， plays a decisive role in the performance of such materials. However，the low diffraction characteristic brings problems in the determination of nanostructure which led to the difficulty in the controllable preparation of porous calcium silicate hydrate. In response，previous studies focused on the preparation and application of crystalline calcium silicate hydrate. In this study，a porous calcium silicate(PCS)，novel semi-crystalline material，with unique pore structure was prepared via low temperature hydrothermal synthesis method. The structure was investigated via X-ray dif\u0002fraction(XRD) ， Fourier transform infrared spectroscopy(FT-IR) ， scanning electron microscopy(SEM) ， transmission electron microscopy(TEM)，1 H nuclear magnetic resonance cryoporometry(1 H NMR-C) and Brunauer\u0002Emmett-Teller method(BET). Multi-characterization methods were proposed to determine the nanostructure of the semi-crystalline material with low diffraction characteristics in this work. The results showed that the prepared PCS was semi-crystalline CSH(Ⅰ)，the SBET of it reached 340.9 m2 /g. A special tapered pore and a multi-level pore structure(macro-，meso-，and micropores) were formed naturally during the synthesis process of PCS. The honeycomb\u0002like structure stacked by thin sheets，well-developed conical pores, interconnected micro-，meso-，and macroporesand large specific surface area are favorable to reduce the diffusion resistance of gas molecules. The special structure of the PCS makes it expected to be a novel competitive material in the fields of gas adsorption and enrichment，waste water treatment，and environmental humidity adjustment，etc.
Keyword_Chinese:硅基多孔材料；半晶材料；孔隙结构
Keywords_English:porous silicon-based material；semi-crystalline material；pore structure

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