共查询到20条相似文献,搜索用时 78 毫秒
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Ag/TiO2聚丙烯负载膜的制备及其光催化与抗菌特性研究 总被引:3,自引:0,他引:3
以聚丙烯负载二氧化钛膜为载体,在一定浓度的AgNO3水溶液中,利用光还原在氧化钛膜表面还原Ag,制备载银二氧化钛负载膜,在室光和太阳光下,分别选择Ag/]riO2聚丙烯膜、TiO2聚丙烯膜和活性炭聚丙烯膜,研究膜的抗菌特性和光催化特性.结果表明:Ag/TiO2负载膜由于同时具有Ag和TiOe的双重效用,显示了良好的杀菌特性,无论是在室内还是太阳光下,都没有检测到活的微生物;在水溶液中检测Ag/TiO2负载膜和TiO2负载膜的光催化特性,发现由于银离子的催化活性中心的作用,光催化降解甲基橙的能力与TiO2负载膜相比,能够提高10%左右,显示了良好的光化学特性。 相似文献
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《精细与专用化学品》2015,(9)
采用两步模板法,通过制备二氧化硅胶体晶体模板,以钛酸异丙酯为钛源和三嵌段共聚物P123为介孔导向合成介孔钛硅氧化物光子晶体微球光催化剂。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高分辨透射电子显微镜(HRTEM)对制得的薄膜材料的结构进行表征。结果表明,介孔复合薄膜中锐钛矿型TiO2纳米粒子均匀排列。以罗丹明B为模型物,考察其在紫外光区的光催化活性。结果表明,钛硅氧化物光催化剂降解效果比普通TiO2薄膜有所提高。 相似文献
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《Ceramics International》2020,46(9):13517-13526
In this study, a magnetically recyclable Ni1-xCdxCeyFe2-yO4-rGO (x, y = 0.05) (NCCF-rGO) nanocomposite photocatalyst has been prepared by following a facile in-situ co-precipitation method combined with ultra-sonication means. The as-synthesized magnetically separable NCCF-rGO nanocomposite photocatalyst efficiently degrades methylene blue (MB) dye in comparison to bare Ni1-xCdxCeyFe2-yO4 (x, y = 0.05) (NCCF) nanoparticles (NPs) under visible light irradiation. The photo-degradation rate of MB with NCCF-rGO was ~9 times higher than NCCF nanoparticles (NPs). This enhanced photocatalytic performance of NCCF-rGO photocatalyst was due to the presence of reduced graphene oxide, which greatly help in production of photoactive species by reducing the rate of electro-hole pair recombination. The role of photoactive species that were responsible for the photocatalytic degradation of methylene blue has also been investigated. The as-synthesized NCCF-rGO photocatalyst expressed superb chemical stability and photocatalytic activity even after seven cycle runs. Moreover, the NCCF-rGO nanocomposite worked at all pH values and showed good acid resistance. In particular, the as-synthesized NCCF-rGO photocatalyst could be collected for the next cycle run by simply applying an external magnetic field. Hence, the NCCF-rGO nanocomposite could have potential use in organic dyes contained wastewater treatment. 相似文献
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