Abstract In this paper, a new sol-gel assisted solid-phase method for the preparation of nano BaTiO3 ceramics is proposed to solve the shortcomings of too high temperature in solid-phase preparation and NO2 pollution produced by sol-gel method. The TiO2 precursor gel is used to encapsulate BaCO3, which can effectively reduce the temperature during calcination. In this study, XRD, FT-IR, XPS, TEM, SEM and TG-DSC were used to explore the structure and evolution of samples at different stages. In addition, the crystallization and growth process of BaTiO3 were further studied. Then the energy band structure and electron hole recombination of different samples were analyzed by UV–Vis and PL spectra. Finally, the photocatalytic activity of different samples was investigated by photolytic water experiment. The results showed that BaTiO3 was initially generated at 600 °C and pure phase BaTiO3 was generated at 800 °C. In the photolytic water experiment, the samples calcined at 700 °C showed the best photocatalytic performance, with a hydrogen production rate of 43.74 μmol/g/h.

中文翻译：

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溶胶-凝胶辅助固相法合成BaTiO3纳米颗粒及其形成机理和光催化活性

摘要 针对溶胶-凝胶法固相制备温度过高和NO2污染等缺点，提出了一种溶胶-凝胶辅助固相制备纳米BaTiO3陶瓷的新方法。TiO2前驱体凝胶用于包封BaCO3，可有效降低煅烧温度。本研究通过XRD、FT-IR、XPS、TEM、SEM和TG-DSC等手段对样品不同阶段的结构和演化进行了探索。此外，进一步研究了BaTiO3的结晶和生长过程。然后通过UV-Vis和PL光谱分析不同样品的能带结构和电子空穴复合。最后，通过光解水实验研究了不同样品的光催化活性。结果表明，BaTiO3 最初在 600 °C 下生成，而纯相 BaTiO3 在 800 °C 下生成。在光解水实验中，700 ℃煅烧的样品表现出最好的光催化性能，产氢率为43.74 μmol/g/h。