多孔钙/油茶果壳碳复合材料的结构表征及吸附性能Structure charaterization of porous calcium Camellia oleifera shell carbon composites and its adsorption performance

Abstract

为促进油茶全产业链的发展，以粉碎的油茶果壳为原料，通过浸渍吸附钙离子及原位沉淀技术在油茶果壳生长片状的碳酸钙，然后在高温煅烧条件下得到碳负载的氧化钙复合材料，进一步利用硝酸部分刻蚀负载的氧化钙获得多孔钙/油茶果壳碳复合材料。使用扫描电子显微镜、X射线衍射仪、BET分析仪等对所合成的复合材料及制备过程中的样品进行表征分析，并研究其对亚甲基蓝染料的吸附性能。结果表明，所制备的多孔钙/油茶果壳碳复合材料表面具有疏松多孔结构，比表面积高达118 m2/g，对水体中亚甲基蓝具有优异的吸附性能，且在900 ℃煅烧处理条件下获得的复合材料吸附性能最好。综上，可为开发高性能的油茶果壳碳材料提供新颖的思路。 In order to promote the development of the entire Camellia oleifera industrial chain, pulverized Camellia oleifera shell was employed as templates, and flake calcium carbonate was grown on the debris of Camellia oleifera shell via impregnation/adsorption with Ca2+ and in situ precipitation technique. Then, Camellia oleifera shell carbon loaded calcium oxide was obtained under the condition of high temperature calcination. Next, it was etched partially by nitric acid, and porous calcium Camellia oleifera shell carbon composites were prepared. SEM, XRD and BET characterizations were employed to analyze the prepared materials and samples in process. Meanwhile, their adsorption abilities for methylene blue (MB) were also studied. The results showed that porous calcium Camellia oleifera shell carbon composites had a loosened and porous structure with a high BET surface area of 118 m2/g, and it exhibited decent adsorption ability for MB, and the adsorption ability of the sample calcined at 900 ℃ was the best. In summary, it can provide novel ideas for the development of high-performance Camellia oleifera shell carbon materials.

Keywords

• 油茶果壳；多孔钙；碳复合材料；吸附性能；亚甲基蓝
• camellia oleifera shell; porous calcium; carbon composites; adsorption ability; methylene blue