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Bachvarova-Nedelcheva A, Iordanova R, Stoyanova A, Georgieva N, Nemska V, Foteva T. Effect of B 2O 3 on the Structure, Properties and Antibacterial Abilities of Sol-Gel-Derived TiO 2/TeO 2/B 2O 3 Powders. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6400. [PMID: 37834537 PMCID: PMC10573519 DOI: 10.3390/ma16196400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 09/18/2023] [Accepted: 09/23/2023] [Indexed: 10/15/2023]
Abstract
This paper studies the influence of B2O3 on the structure, properties and antibacterial abilities of sol-gel-derived TiO2/TeO2/B2O3 powders. Titanium(IV) butoxide, telluric(VI) acid and boric acid were used as precursors. Differences were observed in the degree of decomposition of Ti butoxide in the presence of H3BO3 and H6TeO6 acids. The phase transformations of the obtained gels in the temperature range of 200-700 °C were investigated by XRD. Composite materials containing an amorphous phase and different crystalline phases (metallic Te, α-TeO2, anatase, rutile and TiTe3O8) were prepared. Heating at 400 °C indicated a crystalline-to-amorphous-phase ratio of approximately 3:1. The scanning electron microscopy (SEM) analysis showed the preparation of plate-like TiO2 nanoparticles. The IR results showed that the short-range order of the amorphous phases that are part of the composite materials consists of TiO6, BO3, BO4 and TeO4 structural units. Free B2O3 was not detected in the investigated compositions which could be related to the better connectivity between the building units as compared to binary TiO2/B2O3 compositions. The UV-Vis spectra of the investigated gels exhibited a red shift of the cut-off due to the presence of boron and tellurium units. The binary sample achieved the maximum photodegradation efficiency (94%) toward Malachite green dye under UV irradiation, whereas the ternary sample photoactivity was very low. The compositions exhibited promising antibacterial activity against E. coli NBIMCC K12 407.
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Affiliation(s)
- Albena Bachvarova-Nedelcheva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bld. 11, 1113 Sofia, Bulgaria;
| | - Reni Iordanova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bld. 11, 1113 Sofia, Bulgaria;
| | - Angelina Stoyanova
- Department Chemistry and Biochemistry, Faculty of Pharmacy, Medical University—Pleven, Kl. Ohridski Str., 1, 5800 Pleven, Bulgaria;
| | - Nelly Georgieva
- Department Biotechnology, Faculty of Chemical and Systems Engineering, University of Chemical Technology and Metallurgy, Kl. Ohridski Blvd, 8, 1756 Sofia, Bulgaria; (N.G.); (V.N.); (T.F.)
| | - Veronica Nemska
- Department Biotechnology, Faculty of Chemical and Systems Engineering, University of Chemical Technology and Metallurgy, Kl. Ohridski Blvd, 8, 1756 Sofia, Bulgaria; (N.G.); (V.N.); (T.F.)
| | - Tsvetelina Foteva
- Department Biotechnology, Faculty of Chemical and Systems Engineering, University of Chemical Technology and Metallurgy, Kl. Ohridski Blvd, 8, 1756 Sofia, Bulgaria; (N.G.); (V.N.); (T.F.)
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Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2–B2O3 Glasses. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02244-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Algradee MA, Saleh EE, Samir O, Alwany A, EL Sherbini TM. Evaluation of structural, elastic properties and nuclear radiation shielding competence of Nd3+ doped lithium-zinc-phosphate glasses. JOURNAL OF NON-CRYSTALLINE SOLIDS 2022; 576:121304. [DOI: 10.1016/j.jnoncrysol.2021.121304] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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