Sonocrystallization of ZIF-8 on Electrostatic Spinning TiO2 Nanofibers Surface with Enhanced Photocatalysis Property through Synergistic Effect.
Sonocrystallization of ZIF-8 on Electrostatic Spinning TiO2 Nanofibers Surface with Enhanced Photocatalysis Property through Synergistic Effect.
复制标题
DOI：
10.1021/acsami.6b05746
复制
发表时间：
2016-08
影响因子：
9.5
通讯作者：
X. Zeng;Liuqing Huang;Chaonan Wang;Jianshu Wang;Jintang Li;Xuetao Luo
中科院分区：
文献类型：
--
作者：
X. Zeng;Liuqing Huang;Chaonan Wang;Jianshu Wang;Jintang Li;Xuetao Luo
半导体-金属-有机骨架（MOF）复合光催化剂因其光催化活性的提高而受到人们的广泛关注。然而，半导体和MOFs之间的界面反应的影响很少被研究。本文研究了咪唑骨架8分子筛（ZIF-8）修饰静电纺丝TiO 2纳米纤维（TiO 2 ESNFs）的制备及其光催化活性。采用声化学法制备了TiO 2/ZIF-8复合光催化剂。关键是ZIF-8在超声化学处理下均匀地组装在TiO 2 ESNFs表面并形成N-Ti-O键，这可能导致减少电子-空穴对的复合。化学键合的TiO 2/ZIF-8纳米复合材料具有良好的热稳定性和可控的结晶度，在光催化降解罗丹明B（Rh B）的过程中，其光催化活性显著提高。此外，TiO 2/ZIF-8纳米复合材料的紫外-可见光吸收光谱表明，ZIF-8光敏剂将TiO 2的光谱响应扩展到可见光区。该方法为设计新型的光催化剂提供了新的思路。
Semiconductor-metal-organic framework (MOF) hybrid photocatalysts have attracted increasing attention because of their enhanced photocatalytic activity. However, the effect of the interface reaction between semiconductor and MOFs is rarely studied. In this work, we studied the synthesis and photocatalytic activity of zeolitic imidazolate framework-8 (ZIF-8) decorated electrostatic spinning TiO2 nanofibers (TiO2 ESNFs). TiO2/ZIF-8 hybrid photocatalysts were prepared via a facile sonochemical route. It was crucial that the ZIF-8 was assembled homogeneously on the surface of TiO2 ESNFs and formed a N-Ti-O bond under sonochemical treatment, which may result in reducing recombination of the electron-hole pairs. The chemically bonded TiO2/ZIF-8 nanocomposites displayed excellent performance of thermal stability, controllable crystallinity, and great enhancement of photocatalytic activity in Rhodamine B (Rh B) photodegradation. Furthermore, the UV-vis light adsorption spectra of TiO2/ZIF-8 nanocomposites showed that the ZIF-8 photosensitizer extended the spectral response of TiO2 to the visible region. The new strategy reported here can enrich the method for designing new semiconductor-MOF hybrid photocatalysts.