Novel Applications for Oxalate-Phosphate-Amine Metal-Organic-Frameworks (OPA-MOFs): Can an Iron-Based OPA-MOF Be Used as Slow-Release Fertilizer?

Metal-organic frameworks (MOFs) were usually synthesized in hydrothermal conditions; in this study, a more energy-saving, easier to control, and solvent-free mechanochemical method was firstly applied to synthesize MOFs with varied reactants as slow release fertilizer, and the components and structures were characterized by X-ray diffraction (XRD), Fourier transform infrared total attenuated reflectance (FTIR-ATR), and laser-induced breakdown spectroscopy (LIBS). Results showed that three MOFs (compounds I, II, and III) were obtained, the MOFs were confirmed as oxalate phosphate oxalate frameworks (OPA-MOF), and ions were adsorbed between layers that contributed to the contents, while urea molecules mainly impacted the structure. The elemental compositions significantly varied among the three compounds; compound I showed the highest content of N (4.91%), P (15.71%), and Fe (18.60%), compound III indicated the highest content of C (6.52%) and K (12.59%), while the contents of C, K, P, and Fe in compound II were in the medium range. Similar release profiles of Fe and P were found among the three MOFs, and the release rates of nutrients were demonstrated as the order of N > K > P > Fe. The compositions and release profiles demonstrated potential application of MOFs as a novel slow-release fertilizer.

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Facile Fabrication of a Potential Slow-Release Fertilizer Based on Oxalate-Phosphate-Amine Metal-Organic Frameworks (OPA-MOFs)

Materials Science Forum ◽

10.4028/www.scientific.net/msf.936.14 ◽

2018 ◽

Vol 936 ◽

pp. 14-19 ◽

Cited By ~ 3

Author(s):

Ken Aldren S. Usman ◽

Salvador C. Jr. Buenviaje ◽

Yasmin de Guzman Edañol ◽

Marlon T. Conato ◽

Leon M. Payawan Jr.

Keyword(s):

Slow Release ◽

Metal Organic Frameworks ◽

Nitrogen And Phosphorus ◽

Structure Directing Agent ◽

Slow Release Fertilizer ◽

N Release ◽

Fertilizer Release ◽

Metal Organic ◽

Facile Fabrication ◽

Fertilizer Material

This work demonstrates a simple, reproducible and scalable method of producing a potential slow-release fertilizer material. In this study, oxalate-phosphate-amine metal organic frameworks (OPA-MOFs) powder was synthesized from the hydrothermal treatment of ferric chloride (FeCl3•6H2O), orthophosphoric acid (H3PO4), oxalic acid dihydrate (H2C2O4•2H2O), and a common fertilizer, urea (CO(NH2)2). Being a structure directing agent (SDA)-type of MOF, the material is expected to slowly release urea via cation exchange, and eventually trigger the collapse of the framework, thus resulting to the subsequent release of the phosphates and iron-oxalate complexes. Elemental analysis revealed that the synthesized samples contains a promising amount of incorporated nitrogen and phosphorus. In this particular study, increasing in the amount of urea during the synthesis however revealed minimal change in the %N in the final product which tells us that maximum loading has already been achieved. P and N release experiments shall still be done bothinvitroand in actual soil samples to monitor the release delivery kinetics and efficiency of the OPA-MOFs for fertilizer release applications.

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Water-stable zirconium and iron-based metal-organic frameworks (MOFs) as fluoride scavengers in aqueous medium

Separation and Purification Technology ◽

10.1016/j.seppur.2021.118645 ◽

2021 ◽

Vol 270 ◽

pp. 118645

Author(s):

Mohammad Hossien Saghi ◽

Bruno Chabot ◽

Shahabaldin Rezania ◽

Mika Sillanpää ◽

Ali Akbar Mohammadi ◽

...

Keyword(s):

Aqueous Medium ◽

Metal Organic Frameworks ◽

Metal Organic ◽

Iron Based

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Biomimetic Catalysts of Iron–based Metal-Organic Frameworks with High Peroxidase-Mimicking Activity for Colorimetric Biosensing

Dalton Transactions ◽

10.1039/d0dt02504f ◽

2021 ◽

Author(s):

Xiao-Ning Wang ◽

Yu-Meng Zhao ◽

Jialuo Li ◽

Jiandong Pang ◽

Qiang Wang ◽

...

Keyword(s):

Metal Organic Frameworks ◽

Systematic Investigation ◽

Biomimetic Catalysts ◽

Biomimetic Catalyst ◽

Metal Organic ◽

Iron Based ◽

Colorimetric Biosensing

The field of Metal-Organic Frameworks (MOFs)-based biomimetic catalyst has achieved great progresses, but is still in its infancy stage. The systematic investigation on the tailored construction of MOF-based biomimetic catalysts...

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