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Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Languages: Russian
Types: Article
Subjects: TiO2-modified titanium-containing metal-organic framework, magnetron sputtering, vegetable oil, sorption, acid value, peroxide value, degree of extraction, TiO2-модифицированное титансодержащее каркасное соединение; магнетронное распыление; растительное масло; сорбция; кислотное число; перекисное число; степень извлечения
Reported here is the preparation of highly porous and stable new nanomaterial based on titanium-containing metal-organic framework compound - TiO2-modified titanium-containing metal-organic framework by magnetron sputtering strategy. The resulting nanomaterial was characterized using XRD, FT-IR, TGA, and AFM techniques. It is shown that TiO2-modified titanium-containing metal-organic framework has awell-ordered structure and consists of homogeneous nanoparticles 50 nm in size. It is established that as-prepared nanomaterial has high thermal stability. The sorption activity of TiO2-modified titanium-containing metal-organic framework for unrefined vegetable oils was studied. It is established that new sorbent improves the physicochemical properties of unrefined vegetable oils due to the binding of free fatty acids and peroxide compounds formed by oil oxidation. TiO2-modified titanium-containing metal-organic framework is more effective adsorbent as compared to non-modified titanium-containing metal-organic framework and traditional industrial and natural adsorbents. It is shown that the used sorbent can be easily recycled at least five times, via solvent washing. An adsorption mechanism of free fatty acids and peroxides is proposed.
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