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Updated: May 3, 2026
Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
Synthesis of stable Au-SiO2 composite nanospheres with good catalytic activity and SERS effect
Weina Wang1, Zhen Meng2, Qiuhong Zhang1
1State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, PR China; Department of Polymer Science and Engineering, Nanjing University, Nanjing 210093, PR China; Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, PR China.
Abstract:
For improving stability and efficiency of noble metal nanomaterials, a straightforward one-step method was developed to synthesize Au-SiO2 composite nanospheres. Monodisperse hybrid silica nanospheres that had anilino-methyl on the surfaces were prepared first. The as-prepared hybrid silica nanospheres were then used to obtain Au nanocrystal through the redox reaction of HAuCl4 and anilino-methyl. This approach led to a better utilization of Au. By adjusting the surface morphologies and the particle sizes, the functional nanospheres displayed different surface-enhanced Raman scattering effects of Rhodamine 6G. The composite nanospheres showed high catalytic activity and good reusability in catalytic reduction of 4-nitrophenol because of their active gold surface.
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