期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 370, 期 -, 页码 108-116出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2017.07.048
关键词
Magnetic photocatalyst; Nitrogen doped titanium dioxide; Pharmaceuticals and personal care products; Photocatalytic degradation; Sol-gel method
资金
- Research Grants Council of Hong Kong [16206214]
- Innovation and Technology Commission under the Innovation and Technology Fund [ITS/024/16]
TiO2-based photocatalysis offers certain advantages like rapid degradation and mineralization of organic compounds. However, the practical applicability of photocatalysts in degradation of pharmaceuticals and personal care products (PPCPs) is still restricted by challenges including their limited photocatalytic activity under visible light and difficulty in their separation from suspension. To overcome these challenges, a visible-light-driven magnetic N-TiO2@SiO2@Fe3O4 nanophotocatalyst was developed through fine-tuning the pertinent factors (calcination temperature, Fe3O4 loading, and nitrogen doping) involved during synthesis process, on the basis of degradation of ibuprofen (a typical PPCP). The TEM-EDX, XRD and XPS analyses confirmed the successful synthesis of nanophotocatalyst. By comparing nanophotocatalyst's performance on ibuprofen under two visible light sources, i.e., compact fluorescent lamps (CFLs) and light emitting diodes (LEDs) of similar irradiance, CFLs of irradiance 320 mu W cm(-2) and peak emissive wavelength 543 nm served as a better source, resulting in 94% degradation. Furthermore, 93% of benzophenone-3 within 5 h and 71% of carbamazepine within 9 h was degraded under visible light emitted by CFLs. The superparamagnetic behavior of the nanophotocatalyst enabled its successful magnetic separation (95% efficiency) from the suspension within 20-25 min under an electromagnetic field of similar to 200 mT. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据