The pure and Ce-doped (3 wt%, 5 wt%, 7 wt%) SnO₂ hollow spheres have been successfully prepared by a simple one-pot hydrothermal method. The microstructures and optical properties of as-prepared samples were characterized by different techniques, such as XRD, EDS, XPS, SEM, TEM, BET, FTIR and UV–vis DRS. The results showed that Ce ions were doped into the SnO₂ lattice, and the diameter of the Ce-doped SnO₂ hollow sphere was about 200–350 nm. The photocatalytic results showed that all Ce-doped SnO₂ hollow spheres samples exhibited higher photocatalytic performance than pure SnO₂ in the degradation of malachite green (MG) under UV light. The 3 wt% Ce-doped SnO₂ hollow spheres photocatalyst has the highest photocatalytic activity, and the degradation efficiency of MG reaches 92% after UV light irradiation 120 min. However, the degradation efficiency of pure SnO₂ is only 63%. The enhanced photocatalytic activity of Ce-doped SnO₂ can be attributed to the formed defects caused by Ce doped can further inhibit the electron–hole recombination. In addition, the hollow structure of Ce-doped SnO₂ also enable reactant molecules to reach the reactive site more efficiently. A plausible photocatalytic mechanism was proposed for the degradation of MG under UV light irradiation.

已经通过简单的一锅水热法成功地制备了纯的和Ce掺杂的（3wt%、5wt%、7wt%）SnO ₂空心球。通过XRD、EDS、XPS、SEM、TEM、BET、FTIR和UV-vis DRS等不同技术对制备的样品的微观结构和光学性质进行了表征。结果表明，Ce离子掺杂到SnO ₂晶格中，Ce掺杂的SnO ₂空心球的直径约为200-350 nm。光催化结果表明，所有Ce掺杂的SnO ₂空心球样品在紫外光下降解孔雀石绿（MG）时表现出比纯SnO ₂更高的光催化性能。3 wt% Ce 掺杂的 SnO ₂空心球光催化剂具有最高的光催化活性，紫外光照射120分钟后MG的降解效率达到92%。然而，纯SnO ₂的降解效率仅为63%。Ce掺杂的SnO ₂增强的光催化活性可归因于由Ce掺杂引起的形成的缺陷可以进一步抑制电子-空穴复合。此外，Ce掺杂的SnO ₂的中空结构也使反应物分子能够更有效地到达反应位点。提出了一种合理的光催化机制，用于在紫外光照射下降解 MG。