Chen Qiang, Chen Yihong, Wang Zhe, Zhou Yao, Li Changjiu
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China.
College of Materials Science and Engineering, Hainan University, Haikou 570228, China.
Materials (Basel). 2025 Mar 3;18(5):1133. doi: 10.3390/ma18051133.
In this study, porous glass with controllable layered structure was successfully prepared by the phase-separation method, with the aim to develop a high-performance high-temperature catalytic (denitrification) material. Glass compositions with different R values (n (NaO)/n (BO)) were designed based on the phase diagram of sodium borosilicate glass. The layered porous structure was obtained by heat treatment in the phase-separation temperature range and acid-leaching treatment to remove the boron-rich phase. For the adsorption and separation process, the layered pore is very ideal, due to its high contact area, high storage capacity and easy mass transfer characteristics, which means it has high adsorption capacity and separation efficiency. The experimental results show that the thickness of the silicon layer can be precisely controlled in the range of 2-23 μm by adjusting the heat treatment time (1.25-10 h), and the material has excellent high-temperature stability (the pore structure parameters do not change significantly after calcination at 600 °C for 10 h). VO (multiphase redox catalyst) can be uniformly loaded by the impregnation method, and the layered structure can be completely retained. The formation process of the layered structure was studied by infrared, Raman spectroscopy and SEM analysis. This study provides a new strategy for the development of customizable porous materials.
在本研究中，通过相分离法成功制备了具有可控层状结构的多孔玻璃，旨在开发一种高性能的高温催化（脱硝）材料。基于硼硅酸钠玻璃的相图设计了具有不同R值（n(NaO)/n(BO)）的玻璃成分。通过在相分离温度范围内进行热处理和酸浸处理以去除富硼相，从而获得层状多孔结构。对于吸附和分离过程，层状孔隙非常理想，因为它具有高接触面积、高存储容量和易于传质的特性，这意味着它具有高吸附容量和分离效率。实验结果表明，通过调整热处理时间（1.25 - 10小时），硅层的厚度可以精确控制在2 - 23μm范围内，并且该材料具有优异的高温稳定性（在600℃下煅烧10小时后，孔隙结构参数没有明显变化）。可以通过浸渍法均匀负载VO（多相氧化还原催化剂），并且可以完全保留层状结构。通过红外、拉曼光谱和扫描电子显微镜分析研究了层状结构的形成过程。本研究为可定制多孔材料的开发提供了一种新策略。
