De Novo synthesis of platinum-nanoparticle-encapsulated UiO-66-NH2 for photocatalytic thin film fabrication with enhanced performance of phenol degradation

Season S Chen; Chechia Hu; Chia-Hung Liu; Ying-Hui Chen; Tansir Ahamad; Saad M Alshehri; Pin-Hsuan Huang; Kevin C-W Wu

doi:10.1016/j.jhazmat.2020.122431

De Novo synthesis of platinum-nanoparticle-encapsulated UiO-66-NH₂ for photocatalytic thin film fabrication with enhanced performance of phenol degradation

J Hazard Mater. 2020 Oct 5:397:122431. doi: 10.1016/j.jhazmat.2020.122431. Epub 2020 Apr 24.

Authors

Season S Chen¹, Chechia Hu², Chia-Hung Liu³, Ying-Hui Chen¹, Tansir Ahamad⁴, Saad M Alshehri⁴, Pin-Hsuan Huang², Kevin C-W Wu⁵

Affiliations

¹ Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
² Department of Chemical Engineering, R&D Center for Membrane Technology and Luh Hwa Research Center for Circular Economy, Chung Yuan Christian University, Chungli District, Taoyuan City 32023, Taiwan.
³ Department of Urology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Urology, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan.
⁴ Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
⁵ Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan. Electronic address: kevinwu@ntu.edu.tw.

PMID: 32438244
DOI: 10.1016/j.jhazmat.2020.122431

Abstract

The structural and chemical stability of UiO-66-NH₂ and its simulated solar irradiation responsive characteristic make it a suitable metal-organic framework (MOF) candidate as photocatalytic material. Platinum nanoparticles (Pt NPs) are typically immobilized in MOF to enhance the photocatalytic efficiency. However, introducing high metal content in MOF with high dispersion is still challenging using conventional methods. In this paper, we present de novo synthesis of Pt@UiO-66-NH₂, which can reach a highest metal content of 16 wt% with an average nanoparticle size of around 2 nm as confirmed by ICP-MS analysis and TEM images. The presence of benzoic acid plays multiple important roles in Pt@UiO-66-NH₂ formation, including binding formation with Zr clusters, facilitating Pt dispersion, and being a modulator in MOF construction. In addition, the Pt@UiO-66-NH₂ is fabricated on the α-Al₂O₃ substrate as a photocatalytic membrane reactor (PMR) for phenol degradation, which shows over 70 % removal efficiency under light irradiation and H₂O₂ addition. The recycle test shows that the PMR can maintain high catalytic efficiency. The facile de novo synthesis method proposed in this study enables effective immobilization of high metal content in MOF, and construction of membrane-based photocatalyst for scale-up application.

Keywords: Membranes; Metal–organic frameworks (MOFs); Phenolic compounds; Photocatalyst; Pt nanoparticles.

Publication types

Research Support, Non-U.S. Gov't