介孔SiO2包覆Ag/ZIF-8核壳型催化材料的合成

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

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

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.

Titre traduit de la contributionSynthesis of a Core-shell Structured Ag/ZIF-8 Catalyst with Mesoporous Silica Shell
langue originaleChinois
Pages (de - à)1235-1241
Nombre de pages7
journalGaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities
Volume39
Numéro de publication6
Les DOIs
Etat de la publicationPublié - 10 juin 2018
Modification externeOui

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