Pham Hoai Linh, Nguyen Van Dang, Nguyen Van Khien, Le Thi Hong Phong, Ta Ngoc Bach, Pham Do Chung, Tran Quoc Toan, Dang Van Thanh
Institute of Materials Science, Vietnam Academy of Science and Technology Hanoi Vietnam.
Graduate University of Science and Technology, Vietnam Academy of Science and Technology Hanoi Vietnam.
RSC Adv. 2021 Jun 24;11(36):22317-22326. doi: 10.1039/d1ra03468e. eCollection 2021 Jun 21.
Magnetically separable core/shell FeO/ZnO heteronanostructures (MSCSFZ) were synthesized by a facile approach, and their application for enhanced solar photodegradation of RhB was studied. The formation mechanism of MSCSFZ was proposed, in which FeO nanoparticles served as a template for supporting and anchoring the ZnO crystal layer as the shells. The morphology of MSCSFZ can be varied from spherical to rice seed-like structures, and the bandgap was able to be narrowed down to 2.78 eV by controlling the core-shell ratios. As a result, the MSCSFZ exhibited excellent visible-light photocatalytic activity for degradation of rhodamine B (RhB) in aqueous solution as compared to the controlled ZnO nanoparticles. Moreover, MSCSFZ could be easily detached from RhB solution and maintained its performance after 4 cycles of usage. This work provides new insights for the design of high-efficient core/shell recyclable photocatalysts with visible light photocatalytic performance.
通过一种简便的方法合成了磁分离核壳结构的FeO/ZnO异质纳米结构（MSCSFZ），并研究了其在增强太阳光光催化降解罗丹明B（RhB）方面的应用。提出了MSCSFZ的形成机理，其中FeO纳米颗粒作为模板支撑并锚定ZnO晶体层作为壳层。MSCSFZ的形貌可以从球形变化为稻种状结构，并且通过控制核壳比，其带隙能够缩小至2.78 eV。结果表明，与对照的ZnO纳米颗粒相比，MSCSFZ在水溶液中对罗丹明B（RhB）的降解表现出优异的可见光光催化活性。此外，MSCSFZ可以很容易地从RhB溶液中分离出来，并且在4次循环使用后仍保持其性能。这项工作为设计具有可见光光催化性能的高效核壳可回收光催化剂提供了新的见解。
