We prepared TiO 2(anatase) and Sn doped TiO 2 nanoparticlate film by Plasma enhanced Chemical Vapor Deposition(PECVD) method. XRD and XPS experiments showed that Sn was doped into the lattice of TiO 2 with a ratio of ...We prepared TiO 2(anatase) and Sn doped TiO 2 nanoparticlate film by Plasma enhanced Chemical Vapor Deposition(PECVD) method. XRD and XPS experiments showed that Sn was doped into the lattice of TiO 2 with a ratio of n (Sn)∶ n (Ti)=1∶10 . Sn doping largely enhanced the photocatalytic activity of TiO 2 film for phenol degradation. The enhancement in photoactivity by doping was discussed, based on the characterization with AFM, FTIR and EFISPS. Sn doping produced localized level of Sn 4+ in the band gap of TiO 2, about 0.4 eV below the conduction band, which could capture photogenerated electrons and reduce O 2 adsorbed on the surface of TiO 2 film, thus accelerated the photocatalytic reaction.展开更多
本文利用纳米TiO2粉体,以聚乙烯吡咯烷（PVP）为分散剂和结构引导剂,以正硅酸乙酯（TEOS）为纳米SiO2前驱体,在纳米TiO2粉体表面包覆纳米SiO2,制备纳米TiO2-SiO2复合粒子。将纳米TiO2-SiO2复合粒子整理到棉织物上,并通过十六烷基三甲氧...本文利用纳米TiO2粉体,以聚乙烯吡咯烷（PVP）为分散剂和结构引导剂,以正硅酸乙酯（TEOS）为纳米SiO2前驱体,在纳米TiO2粉体表面包覆纳米SiO2,制备纳米TiO2-SiO2复合粒子。将纳米TiO2-SiO2复合粒子整理到棉织物上,并通过十六烷基三甲氧基硅烷（HDTMS）低表面能修饰后,得到抗紫外和超疏水复合功能棉织物。探究制备纳米TiO2-SiO2复合粒子的最佳工艺,并对复合粒子和处理后棉织物进行表征。结果表明,当PVP用量为0.025%,硅钛比例为2∶1,氨水用量为5 m L时,纳米SiO2包覆TiO2效果较好。处理棉织物的抗紫外指数（UPF）达115.42,紫外线UVA（320420 nm）透过率为3.35%,接触角为156.54°,滚动角为8°,具有优异的抗紫外、超疏水性能。此外,处理棉织物经过24 h紫外线照射后,接触角仍为152.73°,滚动角仍可达到9°,实现了耐紫外线稳定性。展开更多
文摘We prepared TiO 2(anatase) and Sn doped TiO 2 nanoparticlate film by Plasma enhanced Chemical Vapor Deposition(PECVD) method. XRD and XPS experiments showed that Sn was doped into the lattice of TiO 2 with a ratio of n (Sn)∶ n (Ti)=1∶10 . Sn doping largely enhanced the photocatalytic activity of TiO 2 film for phenol degradation. The enhancement in photoactivity by doping was discussed, based on the characterization with AFM, FTIR and EFISPS. Sn doping produced localized level of Sn 4+ in the band gap of TiO 2, about 0.4 eV below the conduction band, which could capture photogenerated electrons and reduce O 2 adsorbed on the surface of TiO 2 film, thus accelerated the photocatalytic reaction.
文摘本文利用纳米TiO2粉体,以聚乙烯吡咯烷（PVP）为分散剂和结构引导剂,以正硅酸乙酯（TEOS）为纳米SiO2前驱体,在纳米TiO2粉体表面包覆纳米SiO2,制备纳米TiO2-SiO2复合粒子。将纳米TiO2-SiO2复合粒子整理到棉织物上,并通过十六烷基三甲氧基硅烷（HDTMS）低表面能修饰后,得到抗紫外和超疏水复合功能棉织物。探究制备纳米TiO2-SiO2复合粒子的最佳工艺,并对复合粒子和处理后棉织物进行表征。结果表明,当PVP用量为0.025%,硅钛比例为2∶1,氨水用量为5 m L时,纳米SiO2包覆TiO2效果较好。处理棉织物的抗紫外指数（UPF）达115.42,紫外线UVA（320420 nm）透过率为3.35%,接触角为156.54°,滚动角为8°,具有优异的抗紫外、超疏水性能。此外,处理棉织物经过24 h紫外线照射后,接触角仍为152.73°,滚动角仍可达到9°,实现了耐紫外线稳定性。
