微型多孔材料
沸石
材料科学
乙炔
吸附
碳纤维
钴
化学工程
化学气相沉积
热解
催化作用
无机化学
纳米技术
有机化学
化学
冶金
复合材料
工程类
复合数
作者
Hongying Zhao,Lixiang Li,Huai-yang ZUO,Di Qu,Han Zhang,Lin Tao,Chengguo Sun,Dongying Ju,Baigang An
标识
DOI:10.1016/s1872-5805(23)60776-0
摘要
Zeolite-templated carbons (ZTCs) have a unique three-dimensional (3D) ordered microporous structure and an extra-large surface area, and have excellent properties in adsorption and energy storage. Unfortunately, the lack of efficient synthesis strategies and the difficulty of doing this on a large-scale have seriously limited their development. We have developed a large-scale simple production route using a relatively low synthesis temperature and direct acetylene chemical vapor deposition (CVD) using Co ion-exchanged zeolite Y (CoY) as the template. The Co2+ confined in the zeolite acts as Lewis acid sites to catalyze the pyrolysis of acetylene through the d-π coordination effect, making carbon deposition occur selectively inside the zeolite at 400 °C rather than on the external surface. By systematically investigating the CVD temperature and time, the optimum conditions of 8 h deposition at 400 °C produces an excellent 3D ordered-microporous structure and outstanding structure parameters (3 000 m2 g−1, 1.33 cm3 g−1). Its CO2 adsorption capacity and selectivity are 2.78 mmol g−1 (25 °C, 100 kPa) and 98, respectively. This simple CVD process allows the synthesis of high-quality ZTCs on a large scale at a low cost.
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