Citation: HAO Min-Min, LI Chen, YU Min, ZHANG Ying. Synthesis and Catalytic Activity of Silver Nanoparticles Immobilized onto Composite Microspheres[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB201302042 shu

Synthesis and Catalytic Activity of Silver Nanoparticles Immobilized onto Composite Microspheres

1.
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, P. R. China

Received Date: 22 October 2012
Available Online: 4 February 2013
Fund Project: 国家自然科学基金(21173141) (21173141) 陕西省工业攻关项目(2011K08-14) (2011K08-14) 长江学者和创新团队发展计划(IRT1070) (IRT1070)陕西师范大学大学生创新研究项目(101071836)资助 (101071836)

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 od catalytic activity for the reduction of 4-nitrophenol (4-NP). The observed catalytic activity was related to the swelling and shrinking behavior of the microgel network structure. The catalysis of 4-nitrophenol reduction was controlled by adjusting the thermo-sensitivity of the polymer template.
- Polymer microgel,
- Nano-silver particle,
- Composite material,
- Catalysis,
- p-Nitrophenol
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沈阳化工大学材料科学与工程学院沈阳 110142