Abstract

The paper describes the results of a physicochemical study of materials obtained in the K₂O–MO(M₂O₃)–TiO₂ systems (M = Ni, Mg, Al, Fe, Cr) by pyrolysis of citrate–nitrate compositions and by co-precipitation followed by hydrothermal treatment. It was shown that the nanoparticles formed in the hydrothermal process have a high sorption capacity towards the model dye (methylene blue), but do not show a noticeable photocatalytic activity. The use of the citrate–nitrate method for the synthesis of nanopowders provides materials with a markedly lower sorption capacity, but with a higher photocatalytic activity. Spectral studies were performed to estimate the band gap width of the synthesized samples. As a result, the optimal compositions for obtaining sorbents and photocatalysts in these systems were identified.

中文翻译：

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合成方法对掺杂二价和三价金属离子的钛酸钾的光催化和吸附性能的影响

摘要

本文介绍了在K ₂ O–MO（M ₂ O ₃）–TiO _2中获得的材料的物理化学研究结果。柠檬酸盐-硝酸盐成分的热解，并通过共沉淀然后进行水热处理，从而制得系统（M = Ni，Mg，Al，Fe，Cr）。结果表明，在水热过程中形成的纳米颗粒对模型染料（亚甲基蓝）具有较高的吸附能力，但未显示出明显的光催化活性。柠檬酸盐-硝酸盐方法用于合成纳米粉剂的材料吸附能力明显降低，但光催化活性更高。进行光谱研究以估计合成样品的带隙宽度。结果，确定了在这些系统中获得吸附剂和光催化剂的最佳组合物。