Optimization of metal–organic (citric acid) frameworks for controlled release of nutrients

Wu, Ke; Du, Changwen; Ma, Fang; Shen, Yue; Zhang, Jianmin

doi:10.1039/c9ra06939a

Cited by 18 publications

(10 citation statements)

References 41 publications

(46 reference statements)

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“…The direct yields of the three MOF products were similar, which ranged from 33% to 34%, which was high enough for practical production. The N content in compound I was the highest as 4.91%, which existed in the form of NH 4 + , which was not from the hydrolysis of urea, since there was no urea input in the substrates [ 7 , 21 , 22 ]. Although some amount of urea was involved in the reaction III, the N content was only 0.11%, which meant that urea was difficult to load into the MOF, and most of the urea was lost.…”

Section: Resultsmentioning

confidence: 99%

Solvent-Free Synthesis of Iron-Based Metal-Organic Frameworks (MOFs) as Slow-Release Fertilizers

et al. 2021

Polymers

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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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Section: Resultsmentioning

confidence: 99%

Solvent-Free Synthesis of Iron-Based Metal-Organic Frameworks (MOFs) as Slow-Release Fertilizers

et al. 2021

Polymers

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“…Because of the use of phosphoric acid in hydrothermal preparation, the stretching vibration of P–O was responsible for the peak at 915 cm −1 . 45 Four W 3 O 9 groups formed by edge-sharing octahedra surround a PO 4 tetrahedron in the PW 12 O 40 3− Keggin anion configuration. Various bands attributable to different kinds of oxygen atoms may be seen in the fingerprint area between 1100 and 500 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…Different weight percentages of PWA (5,10,15,25,35,45,55, and 65 wt%) were loaded on Sr-MOF by the impregnation method. Typically, 1.0 g of Sr-MOF was dispersed well with the calculated masses of PWA in 20 mL DI water.…”

Section: Synthesis Of Pwa/sr-mofmentioning

confidence: 99%

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Green construction of eco-friendly phosphotungstic acid Sr-MOF catalysts for crystal violet removal and synthesis of coumarin and xanthene compounds

et al. 2021

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“…When applied for growth of squash (Cucurbita pepo L), and the highest yield of squash plant increased by 52.9% in comparison to untreated squash. Recently, several hybrid MOFs, including iron-based MOF, oxalate-phosphate-amine MOF, and urea/iron MOF, have been synthesized as nanosized fertilizers [95][96][97][98][99].…”

Section: Nanosized Fertilizersmentioning

confidence: 99%

Recent development in functional nanomaterials for sustainable and smart agricultural chemical technologies

2022

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New advances in nanotechnology are driving a wave of technology revolution impacting a broad range of areas in agricultural production. The current work reviews nanopesticides, nano-fabricated fertilizers, and nano activity-based growth promoters reported in the last several years, focusing on mechanisms revealed for preparation and functioning. It appears to us that with many fundamental concepts have been demonstrated over last two decades, new advances in this area continue to expand mainly in three directions, i.e., efficiency improvement, material sustainability and environment-specific stimulation functionalities. It is also evident that environmental and health concerns associated with nano agrochemicals are the primary motivation and focus for most recent work. Challenges and perspectives for future development of nano agrochemicals are also discussed.

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Optimization of metal–organic (citric acid) frameworks for controlled release of nutrients

Abstract: Novel MOFs were fabricated to control nutrient release under hydrothermal conditions, providing new strategies for the development of controlled-release fertilizers with relative low cost, simple production processes and little environmental impact.

Cited by 18 publications

References 41 publications

Solvent-Free Synthesis of Iron-Based Metal-Organic Frameworks (MOFs) as Slow-Release Fertilizers

Solvent-Free Synthesis of Iron-Based Metal-Organic Frameworks (MOFs) as Slow-Release Fertilizers

Green construction of eco-friendly phosphotungstic acid Sr-MOF catalysts for crystal violet removal and synthesis of coumarin and xanthene compounds

Recent development in functional nanomaterials for sustainable and smart agricultural chemical technologies

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