Key Laboratory of Educational Ministry for High Efficient Mining and Safety in Metal Mine, University of Science and Technology Beijing, Beijing 100083, China; Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
J Hazard Mater. 2013 Nov 15;262:527-38. doi: 10.1016/j.jhazmat.2013.09.012. Epub 2013 Sep 16.
O3/UV/TiO2 was used to effectively decompose humic acids (HAs) in drinking water. To obtain a large specific surface area and low band gap energy, Al and Fe co-doped TiO2 nanotubes were successfully synthesized using the hydrothermal method. The effect of the optimal co-doped TiO2 nanotubes catalyst on the HAs removal efficiency through O3/UV/co-doped TiO2 process was investigated. The highest HAs removal efficiency (79.4%) that exhibited a pseudo-first-order rate constant of 0.172 min(-1) was achieved, in the presence of 550 °C calcined 1.0% co-doped TiO2 nanotubes with an Al:Fe ratio of 0.25:0.75. The effects of calcination temperature and doping concentration on anatase phase weight fractions, average crystallite sizes, Brunauer-Emmett-Teller surface area, catalyst band gap energy, and catalyst photocatalytic activity were also discussed. The inorganic anions also affected the catalyst photocatalytic ability. In a neutral solution, SO4(2-) slightly promoted HAs removal. However, HCO3(-) was found to significantly inhibit the catalyst activity, whereas Cl(-) had negligible effect on photocatalytic ability.
O3/UV/TiO2 被用于有效分解饮用水中的腐殖酸（HA）。为了获得大的比表面积和低的带隙能，采用水热法成功合成了 Al 和 Fe 共掺杂 TiO2 纳米管。研究了最佳共掺杂 TiO2 纳米管催化剂对 O3/UV/共掺杂 TiO2 工艺中 HA 去除效率的影响。在 550°C 煅烧、Al:Fe 比为 0.25:0.75 的 1.0%共掺杂 TiO2 纳米管存在下，HA 的去除效率最高（79.4%），表现出的伪一级速率常数为 0.172 min(-1)。还讨论了煅烧温度和掺杂浓度对锐钛矿相重量分数、平均晶粒尺寸、Brunauer-Emmett-Teller 表面积、催化剂带隙能和催化剂光催化活性的影响。无机阴离子也会影响催化剂的光催化能力。在中性溶液中，SO4(2-) 轻微促进了 HA 的去除。然而，HCO3(-) 被发现会显著抑制催化剂活性，而 Cl(-) 对光催化能力几乎没有影响。
