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多孔材料在生物工程、催化、环境工程以及传感系统等方面有着广泛的应用前景。硅化物多孔材料，例如氮化硅(Si3N4)、碳化硅(SiC)，具有优良的机械强度、化学稳定性和热稳定性，在过滤、分离和催化载体等方面有着潜在的应用。另外，多孔硅酸锌(Zn2SiO4)材料在气敏传感器和纳米光电器件等方面有着潜在的应用。然而合成高比表面、孔径可调的硅化物多孔自支撑薄膜在技术上有一定困难，这方面的研究鲜有报道。
孟国文小组的博士生杨亚军，发明了一种合成硅化物多孔膜的新方法——多孔硅膜的原位直接转化法。他们利用这种原位直接转化技术，将自制的多孔硅自支撑薄膜分别转化为氮化硅、碳化硅以及硅酸锌等硅化物多孔薄膜。研究表明，这些硅化物多孔自支撑薄膜，继承了其母相固体(多孔硅薄膜)的形貌和微结构特征。因此，可通过控制多孔硅膜制备过程中的腐蚀参数，获得具有所需形貌和结构的多孔硅薄膜；进而采用这种直接转化方法，就可获得比表面积和孔径可调的硅化物多孔薄膜。该项研究成果在过滤、分离、催化、传感器等方面有潜在的应用前景。该项成果已申请我国发明专利。
撰写的论文“Converting Free-standing Porous Silicon into Related Porous Membranes”投稿到Angew. Chem. Int. Ed.后，审稿人A认为:“Nasnoscale membrane structures are attracting a lot of interest due to their use in filters, catlytic materials, and sensing applications. However the fabrication of nanoscale membrane structures with diverse materials resulting in various functionlity is not simple. Authors in this manuscript suggest a very simple and efficient method to create a variety of Si-based membrane structures by simply converting Si membrane film. All the experimental analysis are proper and their discussion is supporting the result well. I do suggest this manuscript be published in Angewandte Chemie.”。审稿人B认为: “This is a nice report on high-temperature conversions of mesoporous silicon into other functional materials such as silicon nitride. It is to be expected that the Si3N4 membranes produced by the authors will be useful for several applications, ……”。
文章接受发表后，主编来信说“Your Communication "Converting Free-standing Porous Silicon into Related Porous Membranes" has been chosen as a "Hot Paper" by the Editors for its importance in a rapidly evolving field of high current interest. We would therefore like to publish the table of contents entry on Angewandte's homepage prior to publication of the full paper as soon as possible. Please let us know at your earliest convenience if we can proceed with the announcement or if there is any reason not to do so, such as a patent application.”。该论文于2007年11月9日以“Hot Paper”形式发表在该杂志的主页上(http://dx.doi.org/10.1002/anie.200703698)。现已正式发表在Angew. Chem. Int. Ed. 47, 365-367 (2008). | 
