Sol-Gel-Derived Functional Coatings for Pre-Sowing Seed Treatment

被引:1
|
作者
Shilova, Olga A. [1 ,2 ]
Khamova, Tamara V. [1 ]
Panova, Gayane G. [3 ]
Udalova, Olga R. [3 ]
Artemyeva, Anna M. [4 ]
Kornyukhin, Dmitry L. [4 ]
Nikolaev, Anton M. [1 ]
Kovalenko, Anastasiya S. [1 ]
Sinel'nikov, Alexandr A. [5 ]
Kopitsa, Gennady P. [1 ,6 ]
机构
[1] Russian Acad Sci, Lab Inorgan Synth, Inst Silicate Chem, St Petersburg 199155, Russia
[2] St Petersburg Electrotech Univ LETI, Dept Nanotechnol & Nanomat Radioelect, St Petersburg 197376, Russia
[3] Agrophys Res Inst, St Petersburg 195220, Russia
[4] Vavilov Res Inst Plant Genet Resources, St Petersburg 190000, Russia
[5] Voronezh State Univ, Ctr Collect Use Sci Equipment, Voronezh 394018, Russia
[6] Petersburg Nucl Phys Inst, Konstantinov Natl Res Ctr, Kurchatov Inst, Gatchina 188300, Russia
关键词
silica sols; nanoparticles; iron oxides; supramolecular structure; seeds; agrotechnology; TITANIUM-DIOXIDE NANOPARTICLES; OXIDE NANOPARTICLES; GAMMA-FE2O3; SYSTEMS; GERMINATION; MAGHEMITE; QUALITY; BARLEY; IMPACT; GROWTH;
D O I
10.3390/coatings13121978
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The superatomic structure of film-forming sols obtained by the acid hydrolysis of tetraethoxysilane (TEOS) in an aqueous medium (free of organic solvents) was studied using the SAXS method. The formation of nanoparticles (NPs) was confirmed in alcohol-free silica sols with both a low (1 vol. %) content of TEOS and a high (10 vol. %) content of TEOS, hydrolyzed in an aqueous-alcoholic medium. A trimodal size distribution was revealed for the resulting NPs, with radii ranging from less than 1 nm to similar to 11 nm. The volume fraction of NPs tends to grow with increases in TEOS concentration, as well as with the introduction of magnetic NPs of iron oxides into silica sols. The synthesized silica sols and suspensions based on silica sols with FexOy NPs were used for the pre-sowing treatment of white and cauliflower cabbage seeds in order to provide a functional coating on their surfaces, thereby improving seed germination, stimulating their growth in the early stages of development, and suppressing the effect of phytopathogens. The effect of the pre-sowing seed treatment in sol-gel compositions on seed germination and the growth characteristics of plant seedlings is analyzed, including the influence of iron-oxide magnetic NPs' compositions and concentrations in silica sols.
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页数:17
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