聚多巴胺功能化的纤维素材料用于造纸废水中有机染料的催化

Poly(dopamine) Functionalization of Cellulose Materials for Catalytic Degradation of Organic Dyes

关键词:  纤维素  多巴胺  银  催化

Key Words:cellulose  dopamine  silver  catalysis

摘要:实验主要采用棉浆纤维素和多巴胺两种生物质材料，先用棉浆纤维素制备纤维素膜（CF），然后利用多巴胺的黏附性和自聚合性，在纤维素膜表面均匀地包覆上一层聚多巴胺，并利用聚多巴胺的还原性在其表面负载上单质银，用于废水中有机染料的催化降解。利用紫外可见光谱（Uv-vis）、红外光谱（FT-IR）、X射线衍射（XRD）、扫描电镜（SEM）等手段对复合膜进行了分析表征。结果显示，聚多巴胺在纤维素膜表面包覆量越大，对银离子的还原作用越强，对有机染料中间体4-硝基苯酚的催化效率越高。

Abstract:In this study, taking advantages of the properties of adhesion and self-polymerization of dopamine, a layer of poly(dopamine)(PDA) was evenly covered on the cellulose film（CF）, on which elementary silver particles were further loaded by using the reducing ability of PDA, finally the CF loaded with elementary silver particles was used for catalytic degradation of organic dyes in wastewater. The composite film was characterized by Uv-vis, FT-IR, SEM and XRD. The results showed that with the amount of the PDA increased on the surface of CF, the ability for reducing silver ions became much stronger, and had higher catalytic efficiency for the 4- nitro phenol which is organic dye intermediate.