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具有优异结构和织构性质以及极高稳定性的有序介孔Zr-Al复合氧化物的合成

Synthesis of Ordered Mesoporous Zr-Al Composite Oxides with Excellent Structural and Textural Properties and Extremely High Stability.

作者信息

Yu Feng, Bi Shinan, Liu Tonghui, Pan Dahai, Chen Shuwei, Yan Xiaoliang, Fan Binbin, Li Ruifeng

机构信息

Research Centre of Energy Chemical & Catalytic Technology, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.

出版信息

Materials (Basel). 2020 Jul 7;13(13):3036. doi: 10.3390/ma13133036.

DOI:10.3390/ma13133036
PMID:32645947
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7372406/
Abstract

Ordered mesoporous Zr-Al composite oxide materials (denoted as OMZA-x) with different Zr contents have been synthesized by a solvent evaporation-inducing self-assembly procedure associated with a thermal treatment at 100 °C. A cooperative co-assembly process of amphiphilic triblock copolymer F127 molecules and inorganic hydroxyl species originated from the hydrolysis of Zr and Al precursors was proposed to explain the synthesis of OMZA-x. Compared to ordered mesoporous alumina prepared without introducing Zr species, the resultant OMZA-x exhibited a much more ordered mesostructure combined with a distinct increase in the pore volume and specific surface area. The highly homogenous doping of Zr into the mesopore walls together with the formation of Zr-O-Al bonds can effectively enhance the thermal and hydrothermal stability of OMZA-x. For instance, the ordered mesostructure and excellent textural properties of OMZA-6 prepared with the optimum atomic ratio of Al to Zr of 6 could be well maintained even after a high-temperature treatment at 1000 °C for 1 h or a hydrothermal treatment at 100 °C for 6 h.

摘要

通过在100℃下进行热处理的溶剂蒸发诱导自组装程序，合成了具有不同Zr含量的有序介孔Zr-Al复合氧化物材料（记为OMZA-x）。提出了两亲性三嵌段共聚物F127分子与源自Zr和Al前驱体水解的无机羟基物种的协同共组装过程，以解释OMZA-x的合成。与未引入Zr物种制备的有序介孔氧化铝相比，所得的OMZA-x表现出更有序的介观结构，同时孔体积和比表面积明显增加。Zr高度均匀地掺杂到介孔壁中以及Zr-O-Al键的形成可以有效地提高OMZA-x的热稳定性和水热稳定性。例如，以Al与Zr的最佳原子比6制备的OMZA-6，即使在1000℃下高温处理1小时或在100℃下水热处理6小时后，其有序介观结构和优异的织构性质仍能得到很好的保持。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a94c/7372406/e7f0567eac01/materials-13-03036-g011.jpg
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