| 朱力校.一步法制备银-硫化银负载多孔TiO2及其光催化和抗菌性能[J].分子催化,2013,(5):467-473 |
| 一步法制备银-硫化银负载多孔TiO2及其光催化和抗菌性能 |
| One-pot hydrothermal synthesis of Ag@Ag2S modified porous TiO2 and its photocalytic and antimicrobial properties |
| 投稿时间：2013-09-28 修订日期：2013-10-17 |
| DOI： |
| 中文关键词: 一步法 银-硫化银 等离子共振效应 多孔TiO2 抑菌 |
| 英文关键词:one-pot hydrothermal synthesis Ag@Ag2S surface plasmon resonance porous TiO2 antibacterial performance. |
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| 中文摘要: |
| 以钛酸丁酯为前驱体，溴化十六烷基三甲胺为制孔剂,采用一步水热法并采用光还原处理制备出银等离子基元负载多孔TiO2光催化剂。结果表明，所制得的Ag@Ag2S/porous TiO2催化剂为锐钛矿相，并有部分板钛矿相，其BET比表面积达243.9m2/g，平均孔径为2.98nm。由于银基表面等离子效应，催化剂光吸收边际红移到475nm处，其在可见光范围的响应明显增强，光生电子-空穴对更容易分离，因而催化剂活性明显增强。在氙灯（加滤光片使波长大于400nm）照射下90min Ag@Ag2S/porous TiO2可以使甲基橙降脱色降解率达到98%。并且此催化剂在重复利用5次后，对甲基橙溶液的脱色降解率仍能保持在90%以上，具有稳定的光催化活性。采用抑菌环法，以大肠杆菌为实验菌种，对催化材料的抗菌性能进行了测试，结果表明，所制得的催化剂Ag@Ag2S/porous TiO2具有较好的抑菌效果，抑菌圈直径达到11mm。 |
| 英文摘要: |
| The photocatalyst of Ag@Ag2S/porous TiO2 was synthesized by one-pot hydrothermal synthesis method with Ti(OBu)4 as forerunner and cetyl trimethyl ammonium bromide（CTAB）as template.The results showed that the synthesized photocatalyst of Ag@Ag2S/porousTiO2 was mainly anatase with a small part of brookite phase.Its BET specific surface area was 243.9m2/g and the average pore diameter was 2.98nm.With surface plasmon resonance,the photo-absorption bound had a redshift about to 475nm,which significantly enhanced the response of the visible range and the photoinduced electron-hole pairs separated easily.The photocatalysis-reaction of methyl orange was used to vertify the reaction activity of as synthesized photocatalysts, with the xenon lamp (the wavelength beyond 400nm) continuous irradiating for 90min, the degradation rate of the methyl orange solution reached 98%. Moreover, the catalyst reused for five times, the degradation rate of methyl orange remained over 90%, which can explain the as synthesized photocatalysts had stable photocatalytic activity.The antibacterial performance test suggested that the photocatalyst also had good antibacterial function. |
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