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Construction of Au@Pt core-satellite nanoparticles based on in-situ reduction of polymeric ionic liquid protected gold nanoparticles

Construction of Au@Pt core-satellite nanoparticles based on in-situ reduction of polymeric ionic liquid protected gold nanoparticles
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摘要 A method of in-situ reduction to prepare Au@Pt core-satellite nanopar- ticles （NPs） is described by using Au NPs coating poly[1-methyl 3-（2-methacryloyloxy propylimidazolium bromine）] （PMMPImB-@-Au NPs） as the template. After electrostatic complex chloroplatinic acid with PMMPImB shell, the composite NP was directly reduced with N2H4 to produce Au@Pt core-satellite NPs. The characterization of composite and core-satellite NPs under different amounts of chloroplatinic acid were studied by DLS, UV-vis absorption spectrum and TEM. The satellite Pt NPs with a small size （-2 nm） dotted around Au core, and the resulting Au@Pt core-satellite NPs showed a red-shift surface plasmon resonance （SPR） and a good dispersion due to effectively electrostatic repulsion providing by the polymeric ionic liquid （PIL） shell. Finally, Au@Pt core-satellite NPs exhibit an enhanced catalytic activity and cycled catalytic capability for the reduction ofp- nitrophenol with NaBH4. A method of in-situ reduction to prepare Au@Pt core-satellite nanopar- ticles （NPs） is described by using Au NPs coating poly[1-methyl 3-（2-methacryloyloxy propylimidazolium bromine）] （PMMPImB-@-Au NPs） as the template. After electrostatic complex chloroplatinic acid with PMMPImB shell, the composite NP was directly reduced with N2H4 to produce Au@Pt core-satellite NPs. The characterization of composite and core-satellite NPs under different amounts of chloroplatinic acid were studied by DLS, UV-vis absorption spectrum and TEM. The satellite Pt NPs with a small size （-2 nm） dotted around Au core, and the resulting Au@Pt core-satellite NPs showed a red-shift surface plasmon resonance （SPR） and a good dispersion due to effectively electrostatic repulsion providing by the polymeric ionic liquid （PIL） shell. Finally, Au@Pt core-satellite NPs exhibit an enhanced catalytic activity and cycled catalytic capability for the reduction ofp- nitrophenol with NaBH4.
作者 Wenlan WU Junbo LI Sheng ZOU Jinwu GUO Huiyun ZHOU
机构地区 College of Chemical Engineering & Pharmaceutics Medical School
出处 《Frontiers of Materials Science》 SCIE CSCD 2017年第1期42-50,共9页 材料学前沿（英文版）
基金 We acknowledge the financial support from the National Natural Science Foundation of China （Grant Nos. 51103035 and 51403055）.
关键词 polymeric ionic liquid gold nanoparticles platinum nanoparticles core-satellite polymeric ionic liquid gold nanoparticles platinum nanoparticles core-satellite
分类号 TB43 [一般工业技术] TB383 [一般工业技术—材料科学与工程]
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Frontiers of Materials Science
2017年 第1期

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