中间相
介孔材料
材料科学
膜
化学工程
锐钛矿
结晶
胶束
纳米技术
化学
光电子学
工程类
水溶液
有机化学
生物化学
液晶
催化作用
光催化
作者
Kun Lan,Lu Liu,Jiayu Yu,Yuzhu Ma,Junye Zhang,Zirui Lv,Shu Yin,Qiulong Wei,Dongyuan Zhao
出处
期刊:JACS Au
[American Chemical Society]
日期:2023-03-13
卷期号:3 (4): 1141-1150
被引量:7
标识
DOI:10.1021/jacsau.3c00007
摘要
Mesoporous materials with crystalline frameworks have been acknowledged as very attractive materials in various applications. Nevertheless, due to the cracking issue during crystallization and incompatible hydrolysis and assembly, the precise control for crystalline mesoscale membranes is quite infertile. Herein, we presented an ingenious stepwise monomicelle assembly route for the syntheses of highly ordered mesoporous crystalline TiO2 membranes with delicately controlled mesophase, mesoporosity, and thickness. Such a process involves the preparation of monomicelle hydrogels and follows self-assembly by stepwise solvent evaporation, which enables the sensitive hydrolysis of TiO2 oligomers and dilatory micelle assembly to be united. In consequence, the fabricated mesoporous TiO2 membranes exhibit a broad flexibility, including tunable ordered mesophases (worm-like, hexagonal p6mm to body-centered cubic Im3̅m), controlled mesopore sizes (3.0–8.0 nm), and anatase grain sizes (2.3–8.4 nm). Besides, such mesostructured crystalline TiO2 membranes can be extended to diverse substrates (Ti, Ag, Si, FTO) with tailored thickness. The great mesoporosity of the in situ fabricated mesoscopic membranes also affords excellent pseudocapacitive behavior for sodium ion storage. This study underscores a novel pathway for balancing the interaction of precursors and micelles, which could have implications for synthesizing crystalline mesostructures in higher controllability.
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