Le Quoc-Chon, Nguyen Chinh Chien, Le Thi Thanh Nhi, Lefèvre Thierry, Dinh Minh Tuan Nguyen, Hong Sung Hyun, Kim Soo Young, Le Quyet Van
Natural Sciences Department, Duy Tan University, Danang 550000, Vietnam.
Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam.
Nanomaterials (Basel). 2020 Feb 17;10(2):339. doi: 10.3390/nano10020339.
Diatomite (DE) has attracted considerable attention owing to its abundance, low cost, and potential for a wide variety of applications. This work reports the development of mesoporous wool-ball-like (WBL) microspheres from natural DE through a simple hydrothermal treatment. We discovered that the presence of cetyltrimethylammonium bromide is a prerequisite for generating monodispersed WBL microspheres. The mechanism for the transformation of pristine DE into mesoporous microspheres through dissolution-recrystallization was clearly investigated. Interestingly, the microspheres exhibited a specific surface area 25-60 times larger than that of the pristine DE. The application of WBL microsphere DE as an effective support for metallic catalysts in the toluene total oxidation reaction was demonstrated.
硅藻土（DE）因其储量丰富、成本低廉且具有广泛的应用潜力而备受关注。这项工作报道了通过简单的水热法从天然硅藻土制备介孔羊毛球状（WBL）微球的过程。我们发现十六烷基三甲基溴化铵的存在是生成单分散WBL微球的前提条件。通过溶解-重结晶将原始硅藻土转变为介孔微球的机制得到了清晰的研究。有趣的是，这些微球的比表面积比原始硅藻土大25至60倍。证明了WBL微球硅藻土作为金属催化剂在甲苯完全氧化反应中的有效载体的应用。
