Improving the efficiency of photocatalytic water splitting to produce hydrogen is currently a hot topic in research. TiO2 nanosheets are a good carrier of photocatalytic materials and have become attractive materials in the new century because of their high active surface exposure characteristics and special morphology. Considering the advantages and disadvantages of conventional chemical and physical methods that are used for preparing TiO2 nanosheets, an optimized scheme for the preparation of TiO2 nanosheets via hydrothermal calcination was proposed. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and UV-visible diffuse reflection absorption spectra (DRS) were used to characterize the structure and morphology of the TiO2 nanosheets, and differences in the photocatalytic water splitting hydrogen production activity of the different calcination temperatures were compared. The suitable calcination temperature of the TiO2 nanosheets was 400°C, and the hydrogen production rate was 270 μmol/h, which indicated that the sheet structure was beneficial for improving the photocatalytic water splitting hydrogen production performance of the material. It is hoped that this work will support the regulation of the surface morphology and surface modification of nanomaterials.

中文翻译：

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二氧化钛纳米片的制备及光催化分解水制氢

提高光催化分解水制氢的效率是目前研究的热点。TiO2纳米片是光催化材料的良好载体，因其高活性的表面暴露特性和特殊的形貌而成为新世纪极具吸引力的材料。综合考虑传统化学和物理方法制备TiO2纳米片的优缺点，提出了水热煅烧制备TiO2纳米片的优化方案。X射线粉末衍射（XRD）、扫描电子显微镜（SEM）和紫外可见漫反射吸收光谱（DRS）用于表征TiO2纳米片的结构和形貌，并比较了不同煅烧温度下光催化水分解产氢活性的差异。TiO2纳米片的适宜煅烧温度为400℃，产氢速率为270 μmol/h，表明该片状结构有利于提高材料的光催化水分解产氢性能。希望这项工作能够支持纳米材料的表面形貌调控和表面改性。