Article, 2024

Zeolite Imidazolate Frameworks-8@SiO2–ZrO2 Crystal–Amorphous Hybrid Core–Shell Structure as a Building Block for Water Purification Membranes

ACS Applied Materials & Interfaces, ISSN 1944-8252, 1944-8244, Volume 16, 9, Pages 11835-11848, 10.1021/acsami.3c19559

Contributors

Chen, Xinxin [1] Boffa, Vittorio 0000-0001-9594-284X (Corresponding author) [1] Ma, Xianzheng [1] Magnacca, Giuliana 0000-0002-3798-5232 [2] Calza, Paola 0000-0002-5165-929X [2] Wang, Deyong [1] Meng, Fanpeng [3] Nielsen, Asbjørn Haaning 0000-0003-4464-8549 [4] Deganello, Francesca S 0000-0002-9194-9742 [5] Li, Kang [6] Yue, Yuan-Zheng 0000-0002-6048-5236 [1]

Affiliations

  1. [1] Aalborg University
    2. [NORA names: AAU Aalborg University; University; Denmark; Europe, EU; Nordic; OECD];
  2. [2] University of Turin
    3. [NORA names: Italy; Europe, EU; OECD];
  3. [3] Shandong Guiyuan Advanced Ceramic Co., Ltd (Sicer), Zibo, 255086, China
    4. [NORA names: China; Asia, East];
  4. [4] Department of the Built Environment, Aalborg, 9220, Denmark
    5. [NORA names: Denmark; Europe, EU; Nordic; OECD];
  5. [5] Institute of Nanostructured Materials
    6. [NORA names: Italy; Europe, EU; OECD];

Abstract

Metal-organic frameworks (MOFs) are emerging as promising materials for water purification membranes, owing to their uniform microporous structures and chemical functionalities. Here, we report a simple procedure for depositing MOF-based nanofiltration membranes on commercial TiO2 ceramic tubular supports, completely avoiding the use of dispersants or binders. Zeolite imidazolate frameworks-8 (ZIF-8) nanocrystals were synthesized in methanol at room temperature and subsequently coated with an amorphous SiO2-ZrO2 gel to generate a dispersion of ZIF-8@SiO2-ZrO2 core-shell nanoparticles. The amorphous SiO2-ZrO2 gel served as a binding agent for the ZIF-8 nanocrystals, thus forming a defect-free continuous membrane layer. After repeating the coating twice, the active layer had a thickness of 0.96 μm, presenting a rejection rate >90% for the total organic carbon in an aquaculture effluent and in a wastewater treatment plant, while reducing the concentration of trimethoprim, here used as a target pollutant. Moreover, the oxide gel provided the MOF-based active layer with good adhesion to the support and enhanced its hydrophilicity, resulting in a membrane with excellent mechanical stability and resistance to fouling during the crossflow filtration of the real wastewater samples. These results implied the high potential of the MOF-based nanocomposite membrane for effective treatment of actual wastewater streams.

Keywords

active layer, adhesion, agents, aquaculture, aquaculture effluent, binder, binding, binding agent, carbon, ceramic tubular support, chemical, chemical functionalization, coating, concentration, concentrations of trimethoprim, core-shell nanoparticles, core-shell structure, crossflow, crossflow filtration, dispersion, effective treatment, effluent, excellent mechanical stability, filtration, framework, function, gel, hybrid core-shell structure, hydrophilicity, layer, materials, mechanical stability, membrane, membrane layer, metal-organic frameworks, methanol, microporous structure, nanocomposite membranes, nanocrystals, nanofiltration membranes, nanoparticles, organic carbon, oxidation, oxide gel, plants, pollution, potential, procedure, purification membranes, rate, rejection, rejection rate, resistance, results, room, room temperature, samples, stability, stream, structure, support, target, target pollutants, temperature, thickness, treatment plants, trimethoprim, tubular supports, wastewater, wastewater samples, wastewater streams, wastewater treatment plants, water, water purification membranes, zeolite, zeolitic imidazolate frameworks-8

Funders

  • China Scholarship Council
  • European Commission

Data Provider: Digital Science

LINKS
-

Matching Records in NORA

SUBJECTS
+

METRICS
+