碳点的绿色合成以及对染料的吸附研究

Green Synthesis of Carbon Dots with Excellent Dye Adsorption Property from Biomass Wastes

从环境保护的观点出发,以农林废弃物波斯菊为原料,通过简化的一步法水热法合成了具有优异性能的碳点(CDs)。通过大量的表征分析实验证明,制备的碳点粒径为1~3 nm,表面具有羟基,氨基和其他活性基团,在紫外光下发出绿色荧光,具有良好的光致发光性能。此外,本实验中将碳点应用于染料吸附,实验表明该材料对三种不同的染料具有一定的吸附效果,分别是亚甲基蓝(MB),品红色和结晶紫(CV)。实验结果表明,碳点在5 min内对三种染料的吸附量可达到40%以上。该合成方法在一定程度上解决了农林废弃物和染料废水处理困难的问题,为环境保护提供了新思路。

Herein,from the point of view of environmental protection,carbon dots(CDs)with excellent properties were synthesized via a simplified one-step hydrothermal method from agricultural and forestry wastes cosmos.Through numbers of characterization analysis experiments,it was proved that the prepared CDs with the size of 1~3 nm contained hydroxyl groups,amino groups and other active groups on the surface,which emitted green fluorescence under ultraviolet light and had good photoluminescence properties.Moreover,applying CDs to dye adsorption,experiments have shown that the material has a certain adsorption effect on three different dyes namely Methylene Blue(MB),Magenta and Crystal Violet(CV).The experimental results showed that the adsorption capacity of the obtained CDs within five minutes to the three dyes can reach more than 40%.To a certain extent,the synthesis method in the research solves the problem of difficult treatment of biomass wastes and dye wastewater,which provides a new idea for environmental protection.