Abstract The effects of the microwave (MWT), hydrothermal (HTT) and mechanochemical treatments (MChT) on the structure and physicochemical properties of TiO2 precipitated from titanium sulfate and chloride were investigated. The obtained materials were characterized using the N2 adsorption/desorption, XRD and XRF analysis, FTIR and UV-Vis spectroscopy. Photo- and mechanocatalytic properties of the samples were also studied as regards the rhodamine B (RhB) degradation in the aqueous solution. All types of treatment cause significant changes in the porous structure of the samples. The XRD results showed the improvement of crystalline structure during MWT and HTT. As follows from the investigations, each way of modification results in the shift of the absorption edge towards higher wavelength values and promotes an increase in the photocatalytic activity in the process of rhodamine B degradation under visible irradiation. For the mechanocatalytic degradation, the antibate dependence of the rate constant of RhB degradation on the specific surface area of catalysts was established.

中文翻译：

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沉淀二氧化钛的机械化学、微波和水热改性对其理化和光催化性能的影响

摘要 研究了微波 (MWT)、水热 (HTT) 和机械化学处理 (MChT) 对硫酸钛和氯化钛沉淀 TiO2 结构和理化性质的影响。使用 N2 吸附/解吸、XRD 和 XRF 分析、FTIR 和 UV-Vis 光谱对所得材料进行表征。还研究了样品的光催化和机械催化性能，涉及水溶液中的罗丹明 B (RhB) 降解。所有类型的处理都会导致样品的多孔结构发生显着变化。XRD 结果表明在 MWT 和 HTT 过程中晶体结构有所改善。根据调查，每种改性方式都会导致吸收边向更高的波长值移动，并促进在可见光照射下罗丹明 B 降解过程中光催化活性的增加。对于机械催化降解，建立了 RhB 降解速率常数对催化剂比表面积的反酸依赖性。