Ampholyte polystyrene spheres self-regulated deposition of noble metal nanoparticles for catalyst applications

作者：Hsiao Szu Ching; Ou Jinn Luh^*; Huang Mao Suan; Chang Chang Pin; Sung Yuh; Ger Ming Der

来源：Colloid and Polymer Science, 2010, 288(16-17): 1611-1619.

DOI：10.1007/s00396-010-2303-x

• Polystyrene microspheres
• Composite
• Nanoparticles
• Catalytic activity

The polystyrene (PS) spheres having dual functional groups were synthesized using emulsifier-free emulsion polymerization based on St/potassium persulfate/water system in the presence of V-50 as co-initiator. Fourier transform infrared (FTIR) confirms the presence of the sulfate and the amino groups on the surfaces of PS spheres. Transmission electron microscopy and X-ray photoelectron spectra revealed that the PS spheres were successfully deposited with catalytic palladium (Pd) or gold (Au) nanoparticles (NPs). The reduction of 4-nitroaniline to 4-phenylenediamine used as a model reaction was performed for catalysis studies and examined by ultraviolet. It was found that both Au and Pd PS dispersions show high catalytic activity. The Pd PS dispersion of 200 mu l with only Pd content of 1.09 wt.% exhibits an excellent catalytic effect superior to the commercial Pd/C catalyst, i.e., less than 35 s taken for the completion of the reduction of 4-nitroaniline.

• 出版日期2010-11
• 单位中国人民解放军国防大学