文献类型：期刊文献

英文题名：Synergy of Ti-O-based heterojunction and hierarchical 1D nanobelt/3D microflower heteroarchitectures for enhanced photocatalytic tetracycline degradation and photoelectrochemical water splitting

作者：Wang, Qiang[1,2];Zhu, Hongmin[2];Li, Bing[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Tohoku Univ, Grad Sch Engn, Aoba Ku, 6-6-02 Aramaki Aza Aoba, Sendai, Miyagi 9808579, Japan

年份：2019

卷号：378

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20192707143474);WOS:【SCI-EXPANDED(收录号:WOS:000487764800022)】；

基金：The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (No. 51774145). The first author also thanks the China Scholarship Council (CSC) for financial support.

语种：英文

外文关键词：K2Ti6O13/TiO2 heterojunction; Hierarchical micro-nano heteroarchitectures; Photocatalytic degradation; Photoelectrochemical water splitting

摘要：Solar-driven photocatalytic pollutant degradation and photoelectrochemical (PEC) water splitting are promising approaches for green environmental remediation and solar energy conversion. In this work, novel hierarchical 1D K2Ti6O13 nanobelt/3D TiO2 microflower heteroarchitectures were controllably synthesized via a facile hydrothermal route. The optimal K2Ti6O13/TiO2 hybrids exhibited much higher photocatalytic activity than single catalysts and good stability for tetracycline (TC) degradation. The removal of TC was also evaluated at different catalyst dosage, temperature, pH and concentration of TC solutions. The contributions of radical species for TC degradation followed a sequence of center dot OH > h(+) > center dot O2-. The intermediates and degradation pathway of TC were determined by LC-MS analysis. Furthermore, significantly enhanced PEC responses of K2Ti6O13/TiO2 composites were also observed compared with the single components, fully proved by open-circuit potential, LSV, transient photocurrent and EIS analysis. Such superior photoactivities were mainly attributed to the synergistic effects between the strongly coupled K2Ti6O13/TiO2 heterojunctions and hierarchical 1D/3D micro-nano architectures, including larger surface area, increased light adsorption and charge separation efficiency. Overall, this work offers a controllable strategy to design novel Ti-O-based heterostructures with hierarchical micro-nano architectures and outstanding performance for photocatalytic and PEC applications.