Size Effect of Hydroxide Nanobuilding Blocks and Nonionic Block Copolymer Templates on the Formation of Ordered Mesoporous Structures
Size Effect of Hydroxide Nanobuilding Blocks and Nonionic Block Copolymer Templates on the Formation of Ordered Mesoporous Structures
复制标题
氢氧化物纳米砌块和非离子嵌段共聚物模板对有序介孔结构形成的尺寸效应
DOI：
10.1021/acs.jpcb.1c00713
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Ishigaki Takamasa
中科院分区：
文献类型：
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作者：
Tarutani Naoki;Katagiri Kiyofumi;Inumaru Kei;Ishigaki Takamasa
使用预结晶纳米粒子作为纳米砌块（NBB）是获得具有结晶壁的介孔材料的一种有前途的方法。在本研究中，研究了氢氧化物 NBB 和非离子嵌段共聚物 (BCP) 模板对有序介观结构形成的尺寸效应。通过环氧化物介导的碱化过程，层状氢氧化镍 NBB 的直径控制在 2 nm 以下。使用市售非离子 BCP（回转半径在 11.9–43.9 Å 范围内）。介周期结构是通过蒸发诱导的自组装过程形成的。氢氧化物 NBB（小于 12.5 Å）和 BCP（大于 19.9 Å）的适当尺寸组合对于形成有序介观结构是必要的。
The use of precrystallized nanoparticles as nanobuilding blocks (NBBs) is a promising way to obtain mesoporous materials with crystalline walls. In this study, the size effects of both hydroxide NBBs and nonionic block copolymer (BCP) templates on the formation of ordered mesostructures are investigated. The diameter of layered nickel hydroxide NBBs was controlled at the sub-2 nm scale by an epoxide-mediated alkalinization process. Commercially available nonionic BCPs (gyration radii in the range of 11.9–43.9 Å) were used. Mesoperiodic structures were formed by the evaporation-induced self-assembly process. A proper size combination of hydroxide NBBs, smaller than 12.5 Å, and BCPs, larger than 19.9 Å, is shown to be necessary to form ordered mesostructures.