Toxic Organophosphate Hydrolysis Using Nanofiber-Templated UiO-66-NH₂ Metal–Organic Framework Polycrystalline Cylinders

Abstract

Metal organic frameworks (MOFs), the UiO series in particular, have attracted much attention because of the high surface area and ability to capture and decontaminate chemical warfare agents. Much work has been done on incorporating these MOFs into or onto textile materials while retaining the desirable properties of the MOF. Many different techniques have been explored to achieve this. Atomic layer deposition (ALD) of TiO followed by solvothermal synthesis of MOF has become one of the most adaptable techniques for growing MOFs on the surface of many different polymer fabric materials. However, little work has been done with using this technique on polymer composite materials. In this work, UiO-66-NH was grown onto the surface of poly(methyl methacrylate) (PMMA)/Ti(OH) and poly(vinylidene fluoride) (PVDF)/Ti(OH) composite fibers by first modifying the surface with ALD of TiO (@TiO) followed by solvothermal synthesis of MOF (@MOF). The catalytic activity of these materials was then evaluated using the simulant paraoxon-methyl (DMNP). These new MOF-functionalized composite fabrics were compared to polyamide-6 (PA-6)@TiO@MOF- and polypropylene (PP)@TiO@MOF-functionalized fabrics. PMMA/Ti(OH)@TiO@MOF fibers resulted in unique hollowed fibers with high surface area of 264 m/g and fast catalytic activity. The catalytic activity of these samples was found to be related to the active MOF mass fraction on the MOF-functionalized composite fabric, with the hollowed PMMA/Ti(OH)@TiO@MOF having the highest weight percent of active MOF and a DMNP t of 26 min followed by PA-6@TiO@MOF with 45 min, PVDF/Ti(OH)@TiO@MOF with 61 min, and PP@TiO@MOF with 83 min.

Electrospinning Combined with Atomic Layer Deposition to Generate Applied Nanomaterials: A Review

“…The resultant fibers were tested for the hydrolysis of methyl paraoxon where the formation of 4-nitrophoxide was observed by monitoring the UV−vis absorption band at 407 nm. 126 PVDF/Ti(OH) 4 and PMMA/Ti(OH) 4 nanofibers were subjected to 200 ALD cycles to form TiO 2 . Then solvothermal synthesis was employed for the synthesis of UiO-66-NH 2 crystals.…”

Swell and Destroy: A Metal–Organic Framework-Containing Polymer Sponge That Immobilizes and Catalytically Degrades Nerve Agents

“…MOFs are modular, hybrid structures 9-16 that exhibit ultrahigh porosity. [17][18][19][20] Zirconium MOFs have shown much promise as heterogeneous catalysts [21][22][23][24] for the hydrolysis of OP contaminants such as dimethyl p-nitrophenylphosphate (DMNP; a known pesticide and NA analogue) [25][26][27][28][29][30][31] and V-series NAs. [32][33][34][35] Zirconium MOFs such as Nu-1000 36 and MOF-808, 37 which possess a lower linker connectivity than the maximum of 12, have been shown to be the most hydrolytically active.…”

Research Progress in Polymer-based Metal-organic Framework Nanofibrous Membranes Based on Electrospinning

“…3 (a) Preparation method and formation mechanism of the in situ ZIF-8/PAN fibers [22] ; (b) Scheme of in situ growth of UiO-66-NH 2 on PAN NFM [23] ; (c) Fabrication process of ZIF-8, MIL-88B(Fe), HKUST-1 and MIL-53(Al) NFMs [25] Ma 等 [26] [6] Fig. 4 Preparation process of self-supported and flexible HKUST-1 NFM [6] 使用性。Li 等 [27] [28] ; (b)ALD 法制备 UiO-66-NH 2 NFM 的示意图 [29] Fig. 5 (a) SEM images of PAN/ZnO/ZIF-8 and PAN/Al 2 O 3 /MIL-53-NH 2 NFMs [28] , and (b) schematic illustration of UiO-66-NH 2 NFMs prepared through ALD [29] 形貌和取向。Parsons 等 [3] [29] [30] Fig.…”

“…4 Preparation process of self-supported and flexible HKUST-1 NFM [6] 使用性。Li 等 [27] [28] ; (b)ALD 法制备 UiO-66-NH 2 NFM 的示意图 [29] Fig. 5 (a) SEM images of PAN/ZnO/ZIF-8 and PAN/Al 2 O 3 /MIL-53-NH 2 NFMs [28] , and (b) schematic illustration of UiO-66-NH 2 NFMs prepared through ALD [29] 形貌和取向。Parsons 等 [3] [29] [30] Fig. 6 Effective deposition MOF on the ''inert'' polymer fibrous membranes by using polydopamine layer as nucleation center [30] 上述制备 [33] ; (b)Bio-MOF/PAN 过滤器对阳离子染料的 选择性吸附 [37] ; (c)ZIF-67/CA NFM 对 Cu(II)和 Cr(VI)的吸附机理示意图 [39] Fig.…”