将金纳米粒子(AuNPs)均匀分散到纳米材料中是提高复合材料催化活性的主要策略之一。本研究原位制备出负载AuNPs的壳聚糖水凝胶。其中,丙烯酸(AA)作为功能单体,N,N-亚甲基双丙烯酰胺(MBA)作为交联剂,过硫酸铵(APS)作为引发剂。使用扫描电子显微镜(SEM)、红外光谱(FTIR)、热重分析(TG),固体紫外对壳聚糖水凝胶的结构和形貌进行了表征。然后通过催化对硝基苯酚(4-NP)和罗丹明B(RhB)的模型实验来验证负载AuNPs水凝胶对水中染料污染物的催化降解能力。结果表明,AuNPs可以有效负载到壳聚糖水凝胶中,对4-NP和RhB具有较高的催化效率。

The fabrication of AuNPs into the nanomaterials with uniform dispersion is one of the main strategies to improve the catalytic activity of nanocomposite.This study prepared in situ AuNPs loaded chitosan hydrogel, with acrylic acid (AA) as functional monomer, N,N-methylenebisacrylamide (MBA) as crosslink ing agent, and ammonium persulfate (APS) as initiator.The structure and morphology of the hydrogel are characterized by Scanning electron microscopy ( SEM), Fourier transform infrared spectroscopy ( FTIR), Thermogravimetry ( TG) and solid ultraviolet.Subsequently, 4 - nitrophenol ( 4 - NP ) and rhodamine B (RhB) catalytic reaction is used as a typical model to evaluate catalytic performances of chitosan (CS)-based composite hydrogel catalysts.It is found that AuNPs could be effectively loaded into chitosan hydrogels and had high catalytic efficiency for 4-NP and RhB.