碳复合氮化碳的制备及其对重金属铜离子的检测

Preparation of Carbon Composite Carbon Nitride and its Detection Ability of Heavy Metal Copper Ions

目前,碳复合氮化碳用于对重金属铜离子的检测已经成为一个重要的研究领域。本文以壳聚糖、双氰胺为原料,通过煅烧制备了碳复合氮化碳,并使用XRD和FTIR等分析方法,对制得的复合材料进行表征。结果表明,550℃下,壳聚糖没有完全碳化,它本身的羟基、氨基等基团连接到了氮化碳上,从而提高了氮化碳的导电、吸附性能。对由不同比例的原料制得的复合材料进行电性能研究后发现,复合改性的氮化碳对铜离子具有更好的吸附能力,当壳聚糖与双氰胺的比例为1∶40时,材料对铜离子具有最好的吸附效果,检出限为1×10^(-6)mol·L^(-1)。

Now, the effect study of carbon composite carbon nitride on the detection of heavy metal copper ions was become an important research field. In this paper, applied chitosan and dicyandiamide as raw materials, carbon composite carbon nitride was prepared, and then, XRD and FTIR analysis methods were used to characterize the prepared composite materials. The results showed that chitosan was not completely carbonized under 550℃. Its own hydroxyl, amino and other groups were connected to carbon nitride,thereby improved the conductivity and adsorption properties of carbon nitride. Afterwards, the electrical properties of the composite materials prepared by different ratios were studied, and it was finally found that the composite modified carbon nitride had better adsorption capacity for copper ions, and when the ratio of chitosan to dicyandiamide was 1:40, the material had the best adsorption effect on copper ions, and its detection limit was 1×10^(-6)mol·L^(-1).