Abstract Carbonaceous materials with unique microstructure obtained by pyrolyzing renewable and environment-friendly nature plants have promising applications in areas such as battery and catalyst support. However, unexpected cracks accompanied by low oxidation resistance retard further development. In this study, a thin SiC coating for strengthening purpose was in-situ deposited on biomorphic porous carbon materials fabricated by pyrolyzing wood while maintaining low density. Continuously ordered microchannel structures from carbonized nature wood with a diameter of ca. 20 μm was completely replicated after depositing SiC coating, resulting in the good anisotropy in mechanical and thermal properties. The thin SiC coating was found to greatly increase compressive strength from 26.4 to 47.4 MPa and thermal conductivity from 0.49 to 14.94 W/m K in the axial direction with improved oxidation resistance of weight loss from 78.5% to 1.51%. In the radial direction, however, the increase of the two properties was lower due to the longitudinal microchannel structure. Feasibility of the biomorphic carbon serving as catalyst support with highly developed continuous channels was evaluated by loading typical molybdenum disulfide (MoS2). Result shows a significant improvement in both adsorption and photodegradation efficiency against the pure MoS2, which is because of the enlarged specific surface area of the catalyst.

中文翻译：

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一种增强天然多孔木材以实现高效光降解的新方法

摘要 通过热解可再生和环境友好的天然植物获得的具有独特微观结构的碳质材料在电池和催化剂载体等领域具有广阔的应用前景。然而，伴随着低抗氧化性的意外裂纹阻碍了进一步的发展。在这项研究中，用于强化目的的薄 SiC 涂层原位沉积在通过热解木材制成的生物形态多孔碳材料上，同时保持低密度。来自碳化天然木材的连续有序微通道结构，直径约 沉积SiC涂层后完全复制了20μm，从而产生了良好的机械和热性能各向异性。发现薄 SiC 涂层可将抗压强度从 26.4 MPa 大幅提高至 47.4 MPa，并将热导率从 0.49 提高至 14。轴向为 94 W/m K，重量损失的抗氧化性从 78.5% 提高到 1.51%。然而，在径向上，由于纵向微通道结构，这两种性能的增加较低。通过加载典型的二硫化钼 (MoS2) 来评估生物形态碳作为具有高度发达的连续通道的催化剂载体的可行性。结果表明，由于催化剂的比表面积增大，对纯二硫化钼的吸附和光降解效率都有显着提高。通过加载典型的二硫化钼 (MoS2) 来评估生物形态碳作为具有高度发达的连续通道的催化剂载体的可行性。结果表明，由于催化剂的比表面积增大，对纯二硫化钼的吸附和光降解效率都有显着提高。通过加载典型的二硫化钼 (MoS2) 来评估生物形态碳作为具有高度发达的连续通道的催化剂载体的可行性。结果表明，由于催化剂的比表面积增大，对纯二硫化钼的吸附和光降解效率都有显着提高。