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生物质衍生石墨烯材料结构和吸附性能的比较研究

Makpal Seitzhanova¹, Zhanar Kudyarova^1,2, Yerlan Doszhanov³

¹Department of Chemical Physics and Materials Science, Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Al-Farabi Ave. 71, Almaty 050040, Kazakhstan.

Molecules (Basel, Switzerland)

|February 27, 2026

概括

研究人员开发了一种可持续的方法,从诸如核桃等农业废物中制造石墨烯. 这一过程产生了高表面积的石墨烯材料,适用于储能和净水应用.

科学领域:

材料科学材料科学材料科学
绿色化学绿色化学
纳米技术纳米技术

背景情况:

石墨烯合成通常依赖于不可再生资源.
开发可持续和具有成本效益的石墨烯生产方法至关重要.
农业残留物是碳材料的丰富而未充分利用的来源.

研究的目的:

从可再生农业残留物中合成含石墨烯的碳材料,开发一种对环境无害且经济可行的方法.
描述合成的石墨烯材料的物理化学特性.
为了评估功能化石墨烯在潜在的净水应用中的吸附性能.

主要方法:

序列式预碳化 (523-573 K),脱化,在1123 K时用氧化物 (KOH) 进行化学激活,并对农业残留物 (核桃,米,杏仁石) 进行轻度脱皮.
使用BET,拉曼光谱法,FTIR光谱法,SEM,TEM和原子吸收火焰发射光谱法进行物理化学表征.
与硫酸功能化以增强吸附性质.

主要成果:

生产了具有1300-1800m2/g的特定表面积,60-90%的碳含量和孔径<100nm的石墨烯板.
拉曼光谱显示了几层石墨烯 (约. 4-5层) 具有高度的结构排序 (I_G/I_2D比例为1.5-2.0).
功能化材料在水溶液中的普通金属盐的吸附效率高达80%.

结论:

开发的方法提供了一条可持续的途径,从农业废物中获得高质量的石墨烯.
与传统方法相比,合成的石墨烯材料表现出增强的孔隙性,石墨的排序和纯度.
这些材料显示出储能,净水和可持续纳米技术应用的巨大潜力.

关键词:

在BET分析中,分析了BET.活性炭活性炭的使用方法吸附吸附是一种吸附.百合石的石头百合石的石头生物质衍生碳来自生物质的碳.含有石墨烯的碳材料.有孔的材料是多孔的材料.大米皮皮皮核桃贝核桃贝核桃贝

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