Abstract Mesoporous carbon hollow sphere (MCHS) is one of the most significant functional materials in various fields. Unfortunately, systematically regulating microstructure of MHCS has been rarely investigated so far. In this work, using one unique simultaneous-hydrolyzation-polymerization process, we are able to precisely control the morphology configurations of MCHS, including its shell thickness and integrate size, hollow void and mesopore in the shell. The shell thickness and integrate size are associated with the synergistic effect of hydrolyzation and polymerization reactions. The hollow void and mesopore are determined by the SiO2 template morphology. Thus, a series of MCHSs with controlled microstructure were achieved through elaborately tuning the precursor. More importantly, different types of MCHSs demonstrate significantly different dielectric and microwave absorbing properties due to the discrepancy of volume ratio between pores and carbon compositions. The typical sample could achieve a broad effective absorption bandwidth of 5.9 GHz and 6.5 GHz with a thickness of 2.35 mm and 2.65 mm, respectively, at a filling ratio of only 20 wt%. These encouraging results significantly promote a deeper understanding of the fundamental chemistry mechanism for constructing MCHS as well as using the material as potential candidate for solving microwave interference issue.

中文翻译：

---

结构可切换的介孔碳空心球框架对敏感的微波响应

摘要 介孔碳空心球（MCHS）是各领域最重要的功能材料之一。不幸的是，到目前为止，很少研究系统地调节 MHCS 的微观结构。在这项工作中，我们使用一种独特的同步水解聚合工艺，能够精确控制 MCHS 的形态配置，包括其壳厚度和整体尺寸、壳中的空洞和中孔。壳厚度和整体尺寸与水解和聚合反应的协同效应有关。空洞和中孔由 SiO2 模板形态决定。因此，通过精心调整前驱体，获得了一系列具有可控微观结构的 MCHS。更重要的是，由于孔隙和碳成分之间的体积比差异，不同类型的 MCHS 表现出显着不同的介电和微波吸收性能。典型样品可以在厚度分别为 2.35 mm 和 2.65 mm 的情况下，在仅 20 wt% 的填充率下实现 5.9 GHz 和 6.5 GHz 的宽有效吸收带宽。这些令人鼓舞的结果极大地促进了对构建 MCHS 的基本化学机制以及将该材料用作解决微波干扰问题的潜在候选材料的更深入理解。分别以仅 20 wt% 的填充率。这些令人鼓舞的结果极大地促进了对构建 MCHS 的基本化学机制以及将该材料用作解决微波干扰问题的潜在候选材料的更深入理解。分别以仅 20 wt% 的填充率。这些令人鼓舞的结果极大地促进了对构建 MCHS 的基本化学机制以及将该材料用作解决微波干扰问题的潜在候选材料的更深入理解。