skip to main content
Ngôn ngữ:
Giới hạn tìm kiếm: Giới hạn tìm kiếm: Dạng tài nguyên Hiển thị kết quả với: Hiển thị kết quả với: Chỉ mục

In situ assembly of dispersed Ag nanoparticles on hierarchically porous organosilica microspheres for controllable reduction of 4-nitrophenol.(Original Paper)

Gao, Yongju ; Zhao, Songfang ; Zhang, Guoping ; Deng, Libo ; Li, Jinhui ; Sun, Rong ; Li, Liyi ; Wong, Ching-Ping

Journal of Materials Science, 2015, Vol.50(9), p.3399(10) [Tạp chí có phản biện]

ISSN: 0022-2461 ; DOI: 10.1007/s10853-015-8898-z

Truy cập trực tuyến

Trích dẫn Trích dẫn bởi
  • Nhan đề:
    In situ assembly of dispersed Ag nanoparticles on hierarchically porous organosilica microspheres for controllable reduction of 4-nitrophenol.(Original Paper)
  • Tác giả: Gao, Yongju ; Zhao, Songfang ; Zhang, Guoping ; Deng, Libo ; Li, Jinhui ; Sun, Rong ; Li, Liyi ; Wong, Ching-Ping
  • Chủ đề: X-Ray Diffraction – Analysis ; Nanoparticles – Analysis ; Electron Microscopy – Analysis ; Adsorption – Analysis ; Aromatic Compounds – Analysis
  • Là 1 phần của: Journal of Materials Science, 2015, Vol.50(9), p.3399(10)
  • Mô tả: Hierarchically porous organosilica microspheres have been facilely synthesized by improved self-assembly of flexible-bridged organosilica precursor without templates and harsh conditions. Subsequently, monodispersed silver nanoparticles (Ag NPs) are in situ grown on the porous microspheres via silver mirror reaction. The as-prepared hybrid composites of Ag supported on porous microspheres are characterized by scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy, X-ray diffraction, thermal gravimetric analysis and nitrogen adsorption and desorption, respectively. These results indicate that not only Ag NPs (20-40 nm) are grown on the organosilica uniformly but also the content of Ag NPs immobilized in the hybrid materials can be well controlled by simply tuning the amount of the Ag(NH.sub.3).sub.2OH. The resultant hybrid microspheres exhibit remarkable and durable performances for the reduction of 4-nitrophenol to 4-aminophenol by NaBH.sub.4 in aqueous solution. Moreover, the catalytic kinetic mode can be tuned by adjusting the parameter in catalytic reaction, and it can be recycled for seven successive cycles with excellent conversion of 100 % within 8 min. Therefore, the present structure design and scalable route for the synthesis of hierarchical catalyst can provide a highly efficient solution for the reduction of nitro-aromatic compounds in the view of environmentally friendly strategy. Electronic supplementary material The online version of this article (doi:10.1007/s10853-015-8898-z) contains supplementary material, which is available to authorized users.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461 ; DOI: 10.1007/s10853-015-8898-z

Đang tìm Cơ sở dữ liệu bên ngoài...