介孔SiO2包覆Ag/ZIF-8核壳型催化材料的合成

Translated title of the contribution: Synthesis of a Core-shell Structured Ag/ZIF-8 Catalyst with Mesoporous Silica Shell

Shanshan Xiao, Yiting Ouyang, Xiaoyun Li, Zhao Wang, Pan Wu, Zhao Deng, Lihua Chen, Baolian Su

Research output: Contribution to journalArticlepeer-review

Abstract

The self-assembly technique was employed to sythesize the Ag nanoparticles on ZIF-8(Ag/ZIF-8). Cetyltrimethyl ammonium bromide(CTAB) was used as the structure-directing agent to facilitate mesoporous silica to coat on the surface of hydrophobic Ag/ZIF-8(Ag/ZIF-8@MS). The prepared Ag/ZIF-8@MS with a core-shell structure was characterized by a series of measurements. The results show that Ag/ZIF-8@MS has a uniform particle size(Ag/ZIF-8@MS: ca. 100 nm, Ag: ca. 15 nm), high specific surface area(539 m2/g) and large pore volume(0.64 m3/g). The TEM images indicate that the thickness of mesoporous silica shell is ca. 20 nm. The structure of catalyst is transformed into Ag/ZnO@MS core-shell structure after calcination at 550℃. Meanwhile, both of the Ag-baesd catalysts were tested for the reaction of 4-nitrophenol to prepare 4-aminophenol. The catalytic results showed that the conversion of 4-nitrophenol catalyzed by Ag/ZIF-8@MS was more than 95%, which proves the advantage of the core-shell structure with ZIF-8 as a carrier.

Translated title of the contributionSynthesis of a Core-shell Structured Ag/ZIF-8 Catalyst with Mesoporous Silica Shell
Original languageChinese
Pages (from-to)1235-1241
Number of pages7
JournalGaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities
Volume39
Issue number6
DOIs
Publication statusPublished - 10 Jun 2018
Externally publishedYes

Keywords

  • Catalytic performance
  • Core-shell
  • Mesoporous silica
  • Silver nanoparticles
  • ZIF-8

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