材料科学
介孔材料
碳纤维
氧化物
碳化物衍生碳
化学工程
纳米技术
纳米复合材料
复合材料
催化作用
有机化学
复合数
碳纳米管
化学
工程类
碳纳米纤维
冶金
作者
Leyan Wang,Geok Leng Seah,Yun Li,Wei Han Tu,William Manalastas,Matthew Jun-Hui Reavley,Edward W. Corcoran,Adam K. Usadi,Zehui Du,Madhavi Srinivasan,Jonathan M. McConnachie,Hock Guan Ong,Kwan Wee Tan
标识
DOI:10.1002/admi.202200151
摘要
Abstract Conventional heat treatments to generate well‐ordered and crystalline mesoporous oxide and carbon structures are limited by long durations and annealing temperatures that can cause mesostructural collapse. This paper describes a facile strategy coupling block copolymer‐directed self‐assembly with high‐power Joule heating to form highly crystalline and well‐ordered mesoporous oxide and carbon nanostructures within second timeframes. The combined approach is compatible with various functional self‐assembled hybrid systems with a range of crystallization temperatures, generating mesoporous composites of γ‐Al 2 O 3 ‐carbon, γ‐Al 2 O 3 /MgO‐carbon, and anatase‐TiO 2 ‐carbon with p 6 mm symmetry, non‐close‐packed mesoporous carbon, as well as hierarchical mesoporous α‐Fe 2 O 3 ‐carbon structures. Removing the polymer/carbon gives well‐defined, highly crystalline mesoporous all‐γ‐Al 2 O 3 and all‐anatase‐TiO 2 structures. Impregnation of chloroplatinic acid followed by Joule heating yields platinum nanoparticles decorated on the channel walls of mesoporous γ‐Al 2 O 3 ‐carbon structures. The resultant Joule‐heating‐induced well‐ordered crystalline mesoporous oxide and oxide‐carbon structures have high thermal and structural stabilities and exhibit better performances in CO 2 adsorption capacity and lithium‐ion batteries than conventional heat‐treated counterparts. This approach represents an energy‐efficient and time‐saving route toward ordered porous materials with high surface area and pore accessibility for a wide range of environmental applications such as carbon sequestration, renewable energy storage, and environmental filtration.
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