TEMPO氧化细菌纤维素基纳米复合凝胶的结构及光催化性能研究

Study on Structure and Photocatalytic Performance of TEMPO-oxidized Bacterial Cellulose-based Nanocomposite Gel

关键词:  TEMPO氧化  细菌纤维素  CdS纳米团簇  纳米复合凝胶  光催化

Key Words:TEMPO oxidization  bacterial cellulose  CdS nanoclusters  nanocomposite gel  photocatalysis

摘要:通过微波辅助溶剂热原位合成反应，制备了纳米硫化镉（CdS）颗粒负载量更高且光催化吸附降解性能更优的氧化细菌纤维素@纳米硫化镉（TOBC@CdS）复合凝胶材料。结果表明，在羧基的络合作用下，立方晶型纳米CdS团簇以类细胞感受器的形貌吸附在TOBC纤维非结晶区域，形成了较为稳定的有机无机杂化结构。可见光照射180 min后，TOBC@CdS纳米复合凝胶可有效光催化降解87.27%的亚甲基蓝（MB）；实验重复5次后，其光催化降解性能没有明显衰减。

Abstract:The oxidized bacterial cellulose@cadmium sulfide （TOBC@CdS） nanocomposite gel with high CdS loading percentage and better photocatalytic degradation performance were obtained through the microwave assisted solvo-thermal in-situ synthesis reaction. The results showed that cell receptor-like cubic CdS nanoclusters were mainly attached to amorphous region of TOBC fiber via complexation of carboxyl group， forming stable organic-inorganic hybrid structure. TOBC@CdS nanocomposite gel possessed efficient photocatalytic degradation activity with 87.27% removal of MB under 180 min visible light irradiation， and exhibited satisfactory cyclic utilization with slight attenuation after 5 cycles.