Palygorskite/g-C3N4 conjunction for visible-light-driven degradation of tetracycline hydrochloride

  • Lina Wang
  • Changxin Yan
  • Qizhao WangEmail author


In this paper, a simple impregnation calcination method was employed to fabricate a productive photocatalyst by introducing g-C3N4 onto the palygorskite (pal). The structure and morphology of the as-prepared pal/g-C3N4 composites were analyzed by X-ray diffractometer, scanning electron microscopy, N2 absorption–desorption isotherm (BET) and Fourier transform infrared spectroscopy. Their optical properties were confirmed by using UV–Vis diffuse reflectance spectroscopy and photoluminescence (PL). The photocatalytic performances of pal/g-C3N4 samples were evaluated through degradation of tetracycline hydrochloride under visible light irradiation. Due to the improvement in the absorption of tetracycline hydrochloride provided by the incorporated pal, 8 wt% calcined pal/g-C3N4 showed superior photocatalytic efficiency, i.e., 85% removal of the contaminant within 100 min, which is higher than either pure g-C3N4 or pal. Still, the possible photocatalytic mechanism was also postulated.



This work was financially supported by the National Natural Science Foundation of China (21663027) and the Fundamental Research Funds for the Central Universities of Chang’an University (300102299304).


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Authors and Affiliations

  1. 1.School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of EducationChang’an UniversityXi’anChina
  2. 2.College of Geography and Environment ScienceNorthwest Normal UniversityLanzhouChina

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