Abstract.1 Mercury selenide (HgSe) films were obtained on glass substrates via the chemical deposition method. The aqueous solutions of mercurium(II) nitrate, potassium iodide and sodium selenosulfate were used. Film samples obtained at two temperatures of synthesis were analyzed by X-ray and structural analysis. The effect of the deposition duration on the optical and morphological properties of HgSe films was investigated. The deposition mechanism was discussed.

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The mercury selenide (HgSe) films were obtained on glass substrates via the chemical deposition method. The aqueous solutions of mercury(II) nitrate, sodium thiosulfate, sodium selenosulfate and tri-sodium citrate were used. X-ray and elemental analysis of the film sample were made. The effect of initial reagents concentration, synthesis duration and temperature on the mass of HgSe films was investigated and coatings thickness was calculated. The optical and morphological properties of HgSe films were examined. The deposition mechanism is discussed.

The phytoremediation of industrial crops is becoming popular for the revitalization of land contaminated by trace elements (TEs). This approach combines biomass production with the improvement of soil health. To implement phytoremediation and derive sufficient dry biomass, crop production must be adequately supported by agricultural practices, including the application of bioinoculants. The current study aims to test the influence of several plant growth-promoting bacteria (PGPB), isolated from TEs-contaminated soil—i.e., Stenotrophomonas maltophilia KP-13, Bacillus altitudinis KP-14, and Pseudomonas fluorescens KP-16 and their consortia on the phytoremediation of the industrial crop M. × giganteus cultivated in the same TEs-contaminated soil. Contrary to expectations, the effects of PGPB on the biomass harvest were low. The most significant increase was detected in leaf biomass treated with a consortium of tested PGPBs. More significant effects were detected in the uptake of individual TEs. The phytoparameters of translocation factor, comprehensive bioconcentration index and uptake index were used to characterize the behavior of the TEs; Cr; Mn; Ni; Cu; Zn; Sr; V; and Pb in the presence of isolates. Plants treated with PGPB strains accumulated minimal concentrations of Cu and Pb in their aboveground biomass, while a tendency for Zn accumulation in the leaves and stems, and Sr accumulation in the leaves was observed. The obtained results reveal the combinations of isolates that lead to the minimal uptake of TEs into the stems and the simultaneous increase in DW. This study provides more insight into the leading factors of phytoremediation supported by PGPB and can be helpful when M. × giganteus is grown on TEs-contaminated soils of different origins.

The impact of the plant growth regulators (PGRs) Stimpo, Regoplant, and Charkor on the production of the second-generation energy crop Miscanthus × giganteus on marginal post-military soil was investigated during two vegetation seasons. The land, previously a tank training polygon, has not been in use since 1990 and has become marginal. Biological parameters (stem, shoot, and root lengths) and dry biomass values were evaluated in relation to the applied treatments. The multivariate general linear model (M-GLM) results showed a positive influence of Charkor on M. × giganteus development; the effect was markedly higher in the second year of vegetation. The impact of Stimpo and Regoplant was less noticeable; nevertheless, certain combinations of treatments showed satisfactory results. The M-GLM approach detected the inter-influence of the main factors of the production process, i.e., PGRs, soil, and year of growing. The results showed the predominant influence of year, PGRs and combined factor PGRs × year on the biological parameters; the other studied factors and their combinations were not as effective. Further research should focus on verifying the field-scale results for the M. × giganteus plantation established in a post-military area and compare the lab and field studies.

ZnS з водного розчину тринатрій цитрату та їх властивості. Тонкі плівки цинк сульфіду (ZnS) завдяки своїм властивостям широко застосову-ються в різних оптичних електронних пристроях. Їх отримують різними методами, серед яких -вакуумна сублімація, високочасто-тне розпилення, метод квазізамкнутого об'єму, золь-гелевий метод, електроосадження. Перелічені методи мають високу енергоза-тратність, що збільшує ціну тонких плівок ZnS. Мета: Метою роботи є встановлення оптимальних умов синтезу тонких плівок ZnS з водного розчину та взаємозв'язку між вмістом цинку в синтезованих плівках, визначеного за допомогою методу інверсійної вольтамперометрії, з їхньою товщиною, структурними, оптичними та морфологічними параметрами. Матеріали і методи: Тонкі плівки ZnS отримано із водних розчинів цинк-вмісної солі методом хімічного осадження. Для синтезу плівок цинк сульфіду вико-ристовували свіжоприготовані розчини цинк-вмісної солі, тринатрійцитрату (Na 3 C 6 H 5 O 7 ) як комплексоутворювача, тіосечовини ((NH 2 ) 2 CS) і амоній гідроксиду (NH 4 OH). Осадження проводили на попередньо підготовані скляні підкладки площею 5,76 см 2 . Ре-зультати: Встановлений фазовий склад плівок, який показав наявність сполуки ZnS в кубічній модифікації (сфалерит). Методом інверсійної вольтамперометрії визначено масу цинку в плівках ZnS від різних умов синтезу, а саме від концентрації вихідної цинк-вмісної солі, тринатрій цитрату, тіосечовини, часу осадження і температури. Досліджено морфологію поверхні, оптичні властивос-ті, товщину отриманих плівок цинк сульфіду. Висновки: На основі отриманих даних встановлені оптимальні умови синтезу плівок ZnS. Тривимірні дослідження морфології поверхні плівки ZnS показало її гладкість, однорідність, суцільність і підтвердило прави-льність визначення оптимальних параметрів синтезу.Ключові слова: тонкі плівки ZnS, інверсійна вольтамперометрія, хімічне осадження. M.A. Sozanskyi, P.I. Shapoval, I.I. Yatchyshyn, V.E. Stadnik, R.E. Gladyshevskii. Synthesis of ZnS thin films from aqueous caustic of trisodium citrate and their properties.Zinc sulfide (ZnS) thin films due to their properties are widely used in various electronic optical devices. They are produced by several methods, among which -vacuum sublimation, high frequency sputtering method, quasiclosed volume method, sol-gel method, electrodeposition. These methods have high energy consumption which increases the price of ZnS thin films. Aim: The aim of this work is to establish the optimal parameters of the synthesis of ZnS thin films of the aqueous caustic and the correlation between content of zinc in the synthesized films determined by the method of stripping voltammetry and thickness, structural, morphological and optical parameters. Materials and Methods: The ZnS thin films were obtained from aqueous caustics of zinc-containing salt using chemical deposition. Fresh solution of zinc-containing salt, trisodium citrate (Na 3 C 6 H 5 O 7 ) as a complexing agent, thiourea ((NH 2 ) 2 CS) and ammonium hydroxide (NH 4 OH) was used for the synthesis of ZnS films by c...

Calcium dialuminate, CaAl4O7, nanopowders with a grossite-type structure, doped with chromium ions, were synthesized via the combined sol–gel solution combustion method. The evolution of phase composition, crystal structure, and microstructural parameters of the nanocrystalline materials depending on the temperature of the thermal treatment was investigated via X-ray powder diffraction and applying the Rietveld refinement technique. The photoluminescent properties of CaAl4O7 nanophosphors activated with Cr3+ ions were studied over the temperature range of 4.5–325 K. The samples show deep red and near-infrared luminescence due to the 2E → 4A2 and 4T2 → 4A2 energy level transitions of Cr3+ ions under excitation in the two broad emission bands in the visible spectral region. The R lines emission reveals a strong temperature dependence. The feasibility of the material for non-contact luminescence sensing is investigated, and good sensitivity is obtained based on the (R2/R1) luminescence intensity ratio and the lifetime of the emission.

The process of HgSe films synthesis by a chemical deposition method, has been investigated. The optimized synthesis parameters were determined by gravimetric measurements. The phase composition, optical properties and surface morphology of HgSe films were studied.