物理化学学报Issue(4)：785-791,7.DOI:10.3866/PKU.WHXB201302042
负载纳米银复合微球制备及其催化性能
Synthesis and Catalytic Activity of Silver Nanoparticles Immobilized onto Composite Microspheres
摘要
Abstract
P(NIPAM-co-AA) copolymer microgels with temperature and pH sensitivities were synthesized by copolymerization of N-isopropylacrylamide (NIPAM) and acrylic acid (AA). Ag/P(NIPAM-co-AA) composite microspheres were prepared via in-situ reduction using ethanol as a reducing agent, based upon a polymer microgel template method. The morphology, composition, and catalytic properties of the prepared composite microspheres were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-visible (UV-Vis) spectrophotometry. It was demonstrated that the Ag/P(NIPAM-co-AA) composite microspheres had an uneven surface structure. The confinement effect of the template microgels significantly improved the dispersion and stability of the loaded silver particles. In addition, the obtained composite materials exhibited good catalytic activity for the reduction of 4-nitrophenol (4-NP). The observed catalytic activity was related to the swel ing and shrinking behavior of the microgel network structure. The catalysis of 4-nitrophenol reduction was control ed by adjusting the thermo-sensitivity of the polymer template.关键词
高分子微凝胶/纳米银颗粒/复合材料/催化/对硝基苯酚Key words
Polymer microgel/Nano-silver particle/Composite material/Catalysis/p-Nitrophenol分类
化学化工引用本文复制引用
郝敏敏,李晨,余敏,张颖..负载纳米银复合微球制备及其催化性能[J].物理化学学报,2013,(4):785-791,7.基金项目
The project was supported by the National Natural Science Foundation of China (21173141), Key Industry Project of Shaanxi Province, China (2011K08-14), Program for Changjiang Scholars and Innovative Research Team in University of China (IRT1070), and Undergraduate Innovative Program of Shaanxi Normal University, China (101071836).国家自然科学基金(21173141),陕西省工业攻关项目(2011K08-14),长江学者和创新团队发展计划(IRT1070)和陕西师范大学大学生创新研究项目(101071836)资助 （21173141）
