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Synthesis of Biochar-Supported K-doped g-C 3 N 4 Photocatalyst for Enhancing the Polycyclic Aromatic Hydrocarbon Degradation Activity

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  • Fayun Li

    (School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 210418, China
    National & Local United Engineering Laboratory of Petroleum Chemical Process Operation, Optimization and Energy Conservation Technology, Liaoning Shihua University, Fushun 113001, China)

  • Meixia Lin

    (College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China)

Abstract

The development of novel and green photocatalysts have attracted considerable attentions due to their excellent performance for environmental remediation, especially for the degradation of persistent pollutants. In this work, the biochar-supported K-doped g-C 3 N 4 composites with the high photocatalytic activity under visible light irradiation was prepared by the calcination-impregnation method. The crystal structure, apparent morphology and functional group composition of the as-prepared photocatalytic materials were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscope (FTIR). Moreover, the characterization of UV-Vis diffuse reflectance spectra (UV-Vis DRS) and photoluminescence technique (PL) verified the good optical properties of resultant samples. Naphthalene was selected as the representative compound to evaluate the photocatalytic performance of the prepared photocatalysts under visible light irradiation. The evaluation results showed that the biochar-supported K-doped g-C 3 N 4 composites exhibited excellent photocatalytic activity (82.19%). Moreover, the photocatalytic degradation rate basically remained unchanged after five cycles, indicating the good stability of the prepared photocatalysts. In addition, a possible mechanism for the photodegradation process was proposed on the basis of the main intermediates detected by gas chromatography-mass spectrometer (GC-MS). This study may provide a promising approach for the polycyclic aromatic hydrocarbon degradation by waste utilization of agricultural biomass and increasing the photocatalytic performance of pure g-C 3 N 4 .

Suggested Citation

  • Fayun Li & Meixia Lin, 2020. "Synthesis of Biochar-Supported K-doped g-C 3 N 4 Photocatalyst for Enhancing the Polycyclic Aromatic Hydrocarbon Degradation Activity," IJERPH, MDPI, vol. 17(6), pages 1-15, March.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:6:p:2065-:d:334843
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    References listed on IDEAS

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    1. Zhigang Zou & Jinhua Ye & Kazuhiro Sayama & Hironori Arakawa, 2001. "Direct splitting of water under visible light irradiation with an oxide semiconductor photocatalyst," Nature, Nature, vol. 414(6864), pages 625-627, December.
    2. Jong-Su Seo & Young-Soo Keum & Qing X. Li, 2009. "Bacterial Degradation of Aromatic Compounds," IJERPH, MDPI, vol. 6(1), pages 1-32, January.
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    Cited by:

    1. Hongyang Lin & Yang Yang & Zhenxiao Shang & Qiuhong Li & Xiaoyin Niu & Yanfei Ma & Aiju Liu, 2022. "Study on the Enhanced Remediation of Petroleum-Contaminated Soil by Biochar/g-C 3 N 4 Composites," IJERPH, MDPI, vol. 19(14), pages 1-14, July.

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