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<p>In this study, a reusable BiVO₄ photocatalytic hydrogel was developed for the efficient removal of tetracycline (TC) using peroxymonosulfate (PMS) activation. The BiVO₄ hydrogel was synthesized via hydrothermal synthesis and embedded into a sodium alginate-based hydrogel matrix. Comprehensive XRD, FTIR, FESEM, EDX, PL AND UV-DRS confirmed the successful formation of the BiVO₄ hydrogel, exhibiting excellent photocatalytic properties. The BiVO₄ hydrogel achieved 85% degradation of TC (10&#xa0;mg/L) within 60&#xa0;min under visible light irradiation, with PMS (400&#xa0;mg/L) as the activator whereas, it showed just 19% degradation under dark(adsorption). Notably, the hydrogel demonstrated exceptional reusability, maintaining its high degradation efficiency over 6 cycles. The enhanced photocatalytic performance of the BiVO₄ hydrogel is attributed to its ability to generate stable electron–hole pairs, which facilitate stronger interactions with PMS, accelerating the degradation process. Moreover, the hydrogel’s effective utilization of visible light (2.22&#xa0;eV) contributes to its high catalytic activity. The synergy between the BiVO₄ photocatalyst and PMS activation significantly increased the generation of reactive oxygen species (ROS) such as O₂*<sup>–</sup>, and OH*<sup>–</sup>, which played a crucial role in the degradation of TC. It highlights the potential of BiVO₄ hydrogel as a sustainable, highly efficient, and reusable photocatalyst for wastewater treatment.</p>

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Visible-Light-Driven BiVO₄-Alginate Hydrogel: An Ecofriendly High-Performance Photocatalyst for Tetracycline Hydrochloride Removal via Peroxymonosulphate Activation

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Hritankhi Tripathy,
  • Tvisha Rachel Binoy,
  • Shiv Charan Prajapati,
  • Arvind Kumar

摘要

In this study, a reusable BiVO₄ photocatalytic hydrogel was developed for the efficient removal of tetracycline (TC) using peroxymonosulfate (PMS) activation. The BiVO₄ hydrogel was synthesized via hydrothermal synthesis and embedded into a sodium alginate-based hydrogel matrix. Comprehensive XRD, FTIR, FESEM, EDX, PL AND UV-DRS confirmed the successful formation of the BiVO₄ hydrogel, exhibiting excellent photocatalytic properties. The BiVO₄ hydrogel achieved 85% degradation of TC (10 mg/L) within 60 min under visible light irradiation, with PMS (400 mg/L) as the activator whereas, it showed just 19% degradation under dark(adsorption). Notably, the hydrogel demonstrated exceptional reusability, maintaining its high degradation efficiency over 6 cycles. The enhanced photocatalytic performance of the BiVO₄ hydrogel is attributed to its ability to generate stable electron–hole pairs, which facilitate stronger interactions with PMS, accelerating the degradation process. Moreover, the hydrogel’s effective utilization of visible light (2.22 eV) contributes to its high catalytic activity. The synergy between the BiVO₄ photocatalyst and PMS activation significantly increased the generation of reactive oxygen species (ROS) such as O₂*–, and OH*–, which played a crucial role in the degradation of TC. It highlights the potential of BiVO₄ hydrogel as a sustainable, highly efficient, and reusable photocatalyst for wastewater treatment.