柚子皮衍生类蜂窝状碳材料在同步检测重金属离子中的应用

不含金属的碳材料通过廉价且易获得的柚子皮经KOH活化和高温热解获得,该碳材料具有高比表面积(1 055 m~2·g~(-1))和高石墨化程度的类蜂窝状结构。将多孔碳(PAC)材料修饰后的电极作为工作电极,采用阳极溶出伏安法(SWASV)同步检测Cd~(2+)、Pb~(2+)和Cu~(2+)离子,表现出较高的灵敏度、可重复性、稳定性和较低的检测限。研究认为PAC的微孔和中孔可以充当有效的离子传递通道,从而加速离子的扩散并显著提高交换效率,而高的石墨化程度提高了材料的导电性,加速了电子传输。

Honeycomb-like Carbon Materials Derived from Pomelo Peels for the Simultaneous Detection of Heavy Metal Ions

The metal-free carbon materials were obtained by a facile KOH activation and pyrolysis process from inexpensive and readily available pomelo peels, and possessed honeycomb-like nanostructures with a high specific surface area of 1 055 m²·g^-1 and a high graphitization degree. A porous activated carbon (PAC) material modified electrode was utilized as the working electrode for the simultaneous detection of Cd²⁺, Pb²⁺, and Cu²⁺ using square-wave anodic stripping voltammetry (SWASV) and exhibited high sensitivity, repeatability, stability and a low detection limit. The interconnected micropores and mesopores act as efficient ion-transfer channels and provid active surface areas with high accessibility, which serve as transport highways to accelerate mass diffusion and significantly promote exchange efficiency. High graphitization degree increases the electrical conductivity of the material and accelerates electron transport.