Home
Resources
Publications
Gold/Periodic Mesoporous Organosilicas with Controllable Mesostructure by Using Compressed CO 2

Gold/Periodic Mesoporous Organosilicas with Controllable Mesostructure by Using Compressed CO 2

Xin Huang, Mengnan Zhang, Meijin Wang, Wei Li, Cheng Wang, Xiaojian Hou, Sen Luan, Qian Wang

Langmuir. 2018 Mar 27;34(12):3642-3653.

PMID: 29478318

Abstract:

Gold nanoparticles confined into the walls of periodic mesoporous organosilicas (PMOs) with controllable morphology have been successfully fabricated through a one-pot method by using different CO2 pressures. The synthesis can be easily conducted in a mixed aqueous solution by using HAuCl4 as gold source and bis[3-(triethoxysilyl)propyl] tetrasulfide and tetramethoxysilane as the organosilica precursor. P123 and compressed CO2 served as the template and catalytic/regulative agent, respectively. Transmission electron microscopy, N2 adsorption, and X-ray diffraction were employed to characterize the structure of the obtained composite materials. To further investigate the formation mechanism, a series of ordered PMOs with one-dimensional nanotube, two-dimensional hexagonal, vesicle-like, and cellular foam structures were obtained by using different CO2 pressures without the gold source. The mechanism for mesostructure evolution of PMOs with different CO2 pressures was proposed and discussed in detail. The catalytic performance of Au-based PMOs was evaluated for the reduction of 4-nitrophenol (4-NP). These obtained composites with different mesostructures not only exhibit excellent catalytic activity, high conversion rate, and remarkable thermal stability, but they also exhibit morphology-dependent reaction properties in the reduction of 4-NP. The possible reaction pathway of the reactants to embedded Au active sites was proposed and schemed.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP40372723	Bis[3-(triethoxysilyl)propyl] tetrasulfide		40372-72-3	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: