Urea-functionalized amorphous calcium phosphate nanofertilizers: optimizing the synthetic strategy towards environmental sustainability and manufacturing costs

Nanosized fertilizers are the new frontier of nanotechnology towards a sustainable agriculture. Here, an efficient N-nanofertilizer is obtained by post-synthetic modification (PSM) of nitrate-doped amorphous calcium phosphate (ACP) nanoparticles (NPs) with urea. The unwasteful PSM protocol leads to N-payloads as large as 8.1 w/w%, is well replicated by using inexpensive technical-grade reagents for cost-effective up-scaling and moderately favours urea release slowdown. Using the PSM approach, the N amount is ca. 3 times larger than that obtained in an equivalent one-pot synthesis where urea and nitrate are jointly added during the NPs preparation. In vivo tests on cucumber plants in hydroponic conditions show that N-doped ACP NPs, with half absolute N-content than in conventional urea treatment, promote the formation of an equivalent amount of root and shoot biomass, without nitrogen depletion. The high nitrogen use efficiency (up to 69%) and a cost-effective preparation method support the sustainable real usage of N-doped ACP as a nanofertilizer.

Researcher Details

Research Paper

Urea-functionalized amorphous calcium phosphate nanofertilizers: optimizing the synthetic strategy towards environmental sustainability and manufacturing costs

Category

Organic fertilisers

Researcher Name

Francisco J. Carmona, Norberto Masciocchi ; Gregorio Dal Sasso, Antonietta Guagliardi ; Gloria B. Ramírez-Rodríguez, José Manuel Delgado-López ; Youry Pii

Organisation/ University

Department of Science and High Technology and To.Sca.Lab, University of Insubria, Italy ; Institute of Crystallography and To.Sca.Lab, Consiglio Nazionale Delle Ricerche, Italy ; Department of Inorganic Chemistry, University of Granada, Granada, Spain ; Faculty of Science and Technologies, Free University of Bolzano, Bolzano, Italy

Designation

Researcher

Phone Number

00000

Patent Applied?

No

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