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以Span-80为调控剂,钛酸四丁酯(TBOT)为钛源,采用低温水解-回流法制备了Fe-F共掺杂TiO_2介孔复合微球(Fe-F/TiO_2)。通过XRD、SEM、FTIR、TG-DTA、BJH和UV-vis DRS测试方法对样品进行了结构性能表征;以部分水解聚丙烯酰胺(HPAM)为目标降解物,研究了Fe-F/TiO_2复合催化剂的光催化性能。结果表明,制得的Fe-F/TiO_2是由直径为10~15nm的纳米粒子堆砌而成的锐钛矿型介孔微球,其中Fe3+可以有效促进锐钛矿而抑制金红石相的生成,使其具有较高的热稳定性;比表面积、孔容积及平均孔径分别是145.11 m2/g、0.26cm3/g和6.23nm。在光降解HPAM的过程中,Fe3+和F-的协同效应可以提升材料的光催化性能,使FeF/TiO_2具有最高的催化活性。在紫外光及可见光条件下,0.1g的Fe-F/TiO_2降解100mL浓度为500mg/L的HPAM溶液120min,其COD去除率分别为81%和74%。
Fe-F co-doped TiO 2 mesoporous composite microspheres (Fe-F / TiO 2) were prepared by low temperature hydrolysis-reflux method using Span-80 as a control agent and tetrabutyl titanate (TBOT) as a titanium source. The structure and properties of the samples were characterized by XRD, SEM, FTIR, TG-DTA, BJH and UV-vis DRS methods. Partially hydrolyzed polyacrylamide (HPAM) Photocatalytic performance. The results show that the prepared Fe-F / TiO 2 is an anatase mesoporous microsphere assembled by nano-particles with a diameter of 10-15 nm, in which Fe 3+ can effectively promote anatase and inhibit the formation of rutile phase. Its high thermal stability; specific surface area, pore volume and average pore size were 145.11 m2 / g, 0.26cm3 / g and 6.23nm. In the process of photodegradation of HPAM, the synergistic effect of Fe3 + and F- can improve the photocatalytic activity of the material and make the highest catalytic activity of FeF / TiO 2. Under UV and visible light conditions, 0.1g Fe-F / TiO 2 degraded 100mL HPAM solution with concentration of 500mg / L for 120min, the COD removal rates were 81% and 74% respectively.