期刊
CHEMOSPHERE
卷 286, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.131541
关键词
Heterogeneous photocatalysts; Photocatalytic degradation; Conductive polymer; Environmental remediation
资金
- Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University, China [2232021G-04]
- Department of Science and Technology of Shandong Province, China [ZR2020QE099, ZR2020QB198]
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, China [ZKT33]
- Opening Project of Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, China [QJRZ1908]
Hierarchical Bi2MoO6/PPy composite photocatalysts prepared through solvothermal method and in-situ chemical oxidation polymerization exhibit significantly improved photocatalytic activity for degrading methylene blue dye and tetracycline antibiotic under visible light irradiation, with the highest degradation rates achieved by Bi2MoO6/PPy-80 sample. The introduction of PPy nanoparticles on the surface of Bi2MoO6 nanosheets effectively accelerates the separation of photo-generated electron-hole pairs, indicating a promising synergetic photocatalytic mechanism for environmental remediation.
To effectively degrade organic pollutants in wastewater, visible-light-driven Bi2MoO6/PPy hierarchical heterogeneous photocatalysts were prepared through a solvothermal method and the following in-situ chemical oxidation polymerization. Compared with pristine Bi2MoO6 photocatalyst, the composite photocatalysts exhibited dramatically improved photocatalytic activity and photostability towards the degradation of methylene blue dye and tetracycline antibiotic. Bi2MoO6/PPy-80 sample achieved the highest photocatalytic degradation rates for methylene blue dye (93.6%) and tetracycline antibiotic (88.3%) under visible light irradiation. These two organic pollutants could be completely degraded into nontoxic small molecules according to in-depth HPLC-MS analysis of degradation products. The transient photocurrent responses, electrochemical impedance spectra, and photoluminescence spectra demonstrated that the introduction of PPy nanoparticles on the surface of Bi2MoO6 nanosheets could effectively accelerate the separation of photo-generated electron-hole pairs. Furthermore, a possible synergetic photocatalytic mechanism was put forward based on the electron spin resonance and XPS valence-band spectra. This work indicated that construction of hierarchical composite photocatalysts combining polypyrrole conductive polymer and Bi2MoO6 semiconductor in nanoscale is an efficient approach to improve photocatalytic activity for environmental remediation.
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