CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai 201800, China; University of Chinese Academy of Sciences, Beijing 100049, China.
CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai 201800, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China.
Carbohydr Polym. 2019 Aug 1;217:15-25. doi: 10.1016/j.carbpol.2019.04.042. Epub 2019 Apr 11.
A bifunctional interfacial layer was introduced onto the surface of cotton fabric which not only enhanced the interfacial bonding between Ag@ZnO and organic substrates but also improved the photocatalytic performance simultaneously. In detail, a modified cotton fabric (denoted as Cot-g-Si/Ag@ZnO) was fabricated through radiation-induced graft polymerization of γ-methacryloxypropyl trimethoxysilane and followed the in-situ formation of ZnO and loading of Ag nanoparticles simultaneously. Owing to ZnOSi between the graft chains and Ag@ZnO photocatalyst, the charge carrier concentration increased and Ag was prevented from oxidizing through the partial separation from ZnO, leading to enhanced near-field amplitudes of the localized surface plasmon resonance. Cot-g-Si/Ag@ZnO also exhibited excellent photocorrosion resistance, photostability and laundering durability. Its photocatalytic activity was fully maintained after several photodegradation cycles; moreover, after laundering durability test, the photocatalytic activity was improved compared with the newly prepared one. Credible mechanism for the photocatalytic activity of Cot-g-Si/Ag@ZnO under sunlight irradiation is proposed.
引入了一种双功能界面层到棉织物表面，这不仅增强了 Ag@ZnO 与有机基底之间的界面结合，而且还同时提高了光催化性能。具体而言，通过γ-甲基丙烯酰氧基丙基三甲氧基硅烷的辐射诱导接枝聚合，并随后原位形成 ZnO 和负载 Ag 纳米粒子，制备了改性棉织物（表示为 Cot-g-Si/Ag@ZnO）。由于接枝链之间的 ZnOSi 和 Ag@ZnO 光催化剂，载流子浓度增加，并且 Ag 被防止通过与 ZnO 的部分分离而氧化，导致局域表面等离子体共振的近场幅度增强。Cot-g-Si/Ag@ZnO 还表现出优异的光腐蚀性、光稳定性和耐洗性。它的光催化活性在经过几次光降解循环后仍能完全保持；此外，经过耐洗性测试后，与新制备的相比，其光催化活性得到了提高。提出了 Cot-g-Si/Ag@ZnO 在阳光照射下光催化活性的可信机制。
