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Facile synthesis of the SiO2/Au hybrid microspheres for excellent catalytic performance

  • Xin-Hui Liu (a1), Bin-Bin Ding (a2), Yan Zhu (a3), Tai-Ya Wang (a3), Bi-Cui Chen (a3), Yong Shao (a3), Ming-Qi Chen (a4), Pan Zheng (a4), Yu-Ling Zhao (a5) and Hai-Sheng Qian (a6)...

Abstract

Au nanoparticles (Au NPs) have attracted much interest owing to their unique optical properties. In this paper, a facile process has been successfully developed to synthesize the SiO2/Au hybrid microspheres with a diameter of 200 nm via the galvanic replacement of SiO2/Ag hybrid microspheres and chlorauric acid (HAuCl4) solution. The as-prepared products were investigated by x-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM, JEOL-6700F), and transmission electron microscopy (TEM, JEOL 3010), respectively. As expected, the as-prepared SiO2/Au hybrid microspheres show strong chemical stability and superior catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The SiO2/Au hybrid microspheres would be found widely used in wastewater treatment, catalytic reaction, bacteriostatic and bactericidal applications.

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Corresponding author

a) Address all correspondence to these authors. e-mail: yshao@zjnu.cn
b) e-mail: shqian@hfut.edu.cn

References

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