Preparation of Hierarchical Porous Silicalite-1 Encapsulated Ag NPs and Its Catalytic Performance for 4-Nitrophenol Reduction

• Main Authors: Bin Wang, Haojiang Wang, Fengwei Zhang, Tijian Sun
• Format: Article
• Language: English
• Published: SpringerOpen 2018-06-01
• Series: Nanoscale Research Letters
• Subjects: Hierarchical porous silicalite-1; In situ encapsulation; Silver nanoparticles; 4-nitrophenol; Hydrogenation
• Online Access: http://link.springer.com/article/10.1186/s11671-018-2579-1

Abstract A facile and efficient strategy is presented for the encapsulation of Ag NPs within hierarchical porous silicalite-1. The physicochemical properties of the resultant catalyst are characterized by TEM, XRD, FTIR, and N2 adsorption-desorption analytical techniques. It turns out that the Ag NPs are well distributed in MFI zeolite framework, which possesses hierarchical porous characteristics (1.75, 3.96 nm), and the specific surface area is as high as 243 m2 · g−1. More importantly, such catalyst can rapidly transform the 4-nitrophenol to 4-aminophenol in aqueous solution at room temperature, and a quantitative conversion is also obtained after being reused 10 times. The reasons can be attributed to the fast mass transfer, large surface area, and spatial confinement effect of the advanced support.