Collaborative Innovation Center of Suzhou Nano Science and Technology College of Chemistry Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Suzhou 215123, PR China.
Collaborative Innovation Center of Suzhou Nano Science and Technology College of Chemistry Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Suzhou 215123, PR China.
J Colloid Interface Sci. 2018 Dec 1;531:11-17. doi: 10.1016/j.jcis.2018.07.045. Epub 2018 Jul 14.
The application of visible light-induced photocatalysts for photocatalytic pollution mitigation has become a promising strategy due to the inexhaustible solar energy. And how to improve pollutants degradation rate is still a meaningful work. Many researchers dealt with this issue by enhancing visible light absorption of photocatalysts. However, few studies focus on this issue by improving semiconductor's absorption property of organic pollutants. Hence, in this work, we prepared the Ag/AgCl foam coated per-6-thio-β-cyclodextrin (SH-β-CD) to improve the photocatalytic activity of Ag/AgCl foam. Here, we chose SH-β-CD because it has a special cavity that can effectively absorb and capture proper organic pollutants via host-guest interaction, which makes it an ideal pollutants surface adsorber when coated on the surface of Ag/AgCl particles. Hence, those trapped pollutants in the cavities can be attacked directly by those reactive oxidation species (ROS) that produced by Ag/AgCl particles under visible light irradiation, resulting in the significant promotion of pollution mitigation rate. The experimental results demonstrated the photodegradation rate constant of methyl orange (MO) by Ag/AgCl@β-CD foam (k = 0.120 min) increased approximately 2.6 times compared with pure Ag/AgCl from (k = 0.048 min). We anticipate our SH-β-CD modified Ag/AgCl foam would be a promising candidate for photodegradation of organic pollutants in wastewater remediation.
由于太阳能取之不尽，可见光诱导光催化剂在光催化污染缓解方面的应用已经成为一种很有前途的策略。如何提高污染物的降解速率仍然是一项有意义的工作。许多研究人员通过增强光催化剂的可见光吸收来解决这个问题。然而，很少有研究通过提高半导体对有机污染物的吸收特性来解决这个问题。因此，在这项工作中，我们制备了 Ag/AgCl 泡沫负载的六硫-β-环糊精（SH-β-CD），以提高 Ag/AgCl 泡沫的光催化活性。在这里，我们选择 SH-β-CD 是因为它具有特殊的空腔，可以通过主客体相互作用有效地吸收和捕获适当的有机污染物，使其成为 Ag/AgCl 颗粒表面涂覆时理想的污染物表面吸附剂。因此，那些被困在空腔中的污染物可以直接被 Ag/AgCl 颗粒在可见光照射下产生的活性氧化物种（ROS）攻击，从而显著提高污染缓解速率。实验结果表明，Ag/AgCl@β-CD 泡沫（k=0.120 min）对甲基橙（MO）的光降解速率常数比纯 Ag/AgCl（k=0.048 min）提高了约 2.6 倍。我们预计，我们的 SH-β-CD 修饰的 Ag/AgCl 泡沫将成为废水修复中有机污染物光降解的有前途的候选材料。
