Biogenic TiO₂ diatoms can be prepared by metabolic incorporation of TiO₂ on the frustule surface of the diatoms. To utilize the photo-catalytic activity of biogenic TiO₂ for practical applications, high production of TiO₂-deposited diatoms is required. Here, we evaluated the growth rate and biogenic TiO₂ production of several domestic diatom species. Among the tested diatoms, Caloneis schroederi (CS) showed high biomass production (4.01 g/L) in a two-stage cultivation system and proper exoskeletal rigidity for efficient production of biogenic TiO₂. The dry weight of the TiO₂-deposited CS frustules (biogenic CS-TiO₂) was 4.52 g/L. Biogenic CS-TiO₂ showed significant photo-catalytic degradation of Congo Red in water with an efficiency of 27.8%, which is higher than that of standard TiO₂ (17.4%). In addition, chloroform could be removed from water through the photo-catalytic activity of biogenic CS-TiO₂ (91%). Therefore, the biogenic CS-TiO₂ developed in this study can be employed for the treatment of pollutant-contaminated wastewater.

可以通过将TiO ₂代谢掺入硅藻的壳表面来制备生物型TiO ₂硅藻。为了在实际应用中利用生物型TiO ₂的光催化活性，需要高产量的TiO ₂沉积硅藻。在这里，我们评估了几种国内硅藻物种的生长速率和生物型TiO _2的产生。在测试的硅藻中，Caloneis schroederi（CS）在两阶段培养系统中显示出高的生物量产量（4.01 g / L），并具有适当的骨骼外刚度以有效生产生物型TiO ₂。沉积TiO _2的CS壳（生物CS-TiO ₂的干重））为4.52 g / L。生物CS-TiO ₂对水中的刚果红具有显着的光催化降解作用，效率为27.8％，高于标准TiO ₂（17.4％）。此外，通过生物CS-TiO ₂（91％）的光催化活性可以从水中去除氯仿。因此，本研究开发的生物CS-TiO ₂可用于处理污染物污染的废水。