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首页> 外文期刊>Journal of materials science >Ternary Fe_3O_4/MoS_2/BiVO_4 nanocomposites: novel magnetically separable visible light-driven photocatalyst for efficiently degradation of antibiotic wastewater through p-n heterojunction
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Ternary Fe_3O_4/MoS_2/BiVO_4 nanocomposites: novel magnetically separable visible light-driven photocatalyst for efficiently degradation of antibiotic wastewater through p-n heterojunction

机译：Ternary Fe_3O_4 / MOS_2 / BIVO_4纳米复合材料：新型磁性可分离可见光光催化剂，通过P-N异质结抗生素废水有效降解

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摘要

The noble metal-free ternary Fe_3O_4/MoS_2/BiVO_4 p-n heterojunctions photocatalyst were prepared via a simply hydrothermal method, which possessed the unique nanospheres-on-microspheres heterostructure. The Fe_3O_4/MoSn/BiVO_4 composite photocatalyst exhibited higher photocatalytic degradation of tetracycline hydrochloride (TCH) than those of MoS_2, BiVO_4 under visible light irradiation (λ > 420 nm). Especially, when the Bi/Mo molar ratio reached 30:1 (FMB3), the FMB3 displayed the highest photocatalytic activity, which can degrade 83% TCH (20 mg/L) within 90 min. The enhanced photocatalytic activity of the ternary photocatalyst could be attributed to the energy band matching and reduction of the charge transfer resistance to promote the spatial separation and reduce the recombination of photogenerated charge carriers due to the formation of built-in electric field by p-n heterojunctions between MoS_2 and BiVO_4. Additionally, MoS_2 can be used as cocatalyst to enhance the separation efficiency of BiVO_4 catalyst carrier and thereby improving the photocatalytic activity. Furthermore, the photocatalyst displayed highly stable recycling performances, which can be separated rapidly with an external magnetic field and be reused for five cycles and remain 91.8% of the first time.
机译：通过简单的水热方法制备光催化剂，制备光催化剂的无贵金属三元Fe_3O_4 / MOS_2 / BIVO_4P-N杂催化剂，该方法具有独特的纳米球 - 微球异质结构。 Fe_3O_4 / MOSN / BIVO_4复合光催化剂表现出比可见光照射（λ> 420nm）下的MOS_2，BIVO_4的盐酸四环素（TCH）更高的光催化降解。特别是，当Bi / Mo摩尔比达到30：1（FMB3）时，FMB3显示出最高的光催化活性，这可以在90分钟内降解83％TCH（20mg / L）。三元光催化剂的增强的光催化活性可归因于能量带匹配和降低电荷传递阻力，以促进空间分离，并通过PN杂结构的形成，促进光生电载体的复合电荷载体的重组MOS_2和BIVO_4。另外，MOS_2可用作助催化剂以增强BIVO_4催化剂载体的分离效率，从而改善光催化活性。此外，光催化剂显示出高度稳定的再循环性能，其可以用外部磁场快速分离，并重复使用五个循环，并在第一次留下91.8％。

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  • 来源
    《Journal of materials science》 |2020年第19期|16746-16758|共13页
  • 作者

    Jifeng Guo; Chaosi Yang; Zexin Sun; Zhao Yang; Liping Wang; Changyu Lu; Zeyang Ma; Feng Guo;

  • 作者单位

    School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang'an University No. 126 Yanta Road Xi'an 710054 Shaanxi. People's Republic of China;

    School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang'an University No. 126 Yanta Road Xi'an 710054 Shaanxi. People's Republic of China;

    School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang'an University No. 126 Yanta Road Xi'an 710054 Shaanxi. People's Republic of China;

    School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang'an University No. 126 Yanta Road Xi'an 710054 Shaanxi. People's Republic of China;

    School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang'an University No. 126 Yanta Road Xi'an 710054 Shaanxi. People's Republic of China;

    School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang'an University No. 126 Yanta Road Xi'an 710054 Shaanxi. People's Republic of China Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure Department of Water Resource and Environment Hebei Geo University. No. 136 Huai'an Road. Shijiazhuang 050031 Hebei. People's Republic of China;

    School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas Ministry of Education Chang'an University No. 126 Yanta Road Xi'an 710054 Shaanxi. People's Republic of China;

    School of Energy and Power Engineering. Jiangsu University of Science and Technology Zhenjiang 212003 Jiangsu People's Republic of China;

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