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<p>A layered bismuth oxide-based ferroelectric ceramic powder, SrBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> (SBN), was synthesized using a conventional solid-state reaction process, and after synthesis, a complete phase characterization (through X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and Ultraviolet-Visible Diffused Reflectance Spectroscopy (UV-Vis DRS)) of the material was conducted in order to verify the phase purity, morphology, bonding states, and surface composition as well as the optical band gap of the material. Addressing dye pollution from the textile industry, this study presents the first experimental evidence of strontium bismuth niobate (SBN) as an effective tribocatalyst for organic dye degradation via mechanical friction. The tribocatalytic mechanism results from a combination of electron transfer and electron transition that generates reactive oxygen species (ROS) through a frictional interaction between SBN and the polytetrafluoroethylene (PTFE) surfaces of the beaker and PTFE disk with magnetic bead. The effect of varying the different experimental parameters (frictional speed, catalyst dosage, dye type, and pH of the dye solution) was systematically investigated for its effect on the tribocatalytic degradation activity of SBN. The tribocatalytic activity of SBN was found to be pH-independent, achieving nearly 90% Rhodamine B (RhB) degradation across all tested pH conditions. Under optimum experimental conditions (30 mL, 10&#xa0;mg/L, 0.1&#xa0;g, and 900&#xa0;rpm), the degradation of RhB surpassed 96% over a 150&#xa0;min. Methyl violet (MV, ~ 97%) and RhB (~ 95%) showed higher degradation compared to the methylene blue (MB, ~ 46%) and the methyl orange (MO, ~ 23%) within 240&#xa0;min at 600&#xa0;rpm.</p>

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Tribocatalytic degradation of organic dyes enabled by the PTFE-SrBi2Nb2O9 friction pair

  • 期刊论文

  • 发表日期：

    2026年6月24日

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  • Rahul,
  • Vishal Singh Chauhan,
  • Rahul Vaish

摘要

A layered bismuth oxide-based ferroelectric ceramic powder, SrBi2Nb2O9 (SBN), was synthesized using a conventional solid-state reaction process, and after synthesis, a complete phase characterization (through X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and Ultraviolet-Visible Diffused Reflectance Spectroscopy (UV-Vis DRS)) of the material was conducted in order to verify the phase purity, morphology, bonding states, and surface composition as well as the optical band gap of the material. Addressing dye pollution from the textile industry, this study presents the first experimental evidence of strontium bismuth niobate (SBN) as an effective tribocatalyst for organic dye degradation via mechanical friction. The tribocatalytic mechanism results from a combination of electron transfer and electron transition that generates reactive oxygen species (ROS) through a frictional interaction between SBN and the polytetrafluoroethylene (PTFE) surfaces of the beaker and PTFE disk with magnetic bead. The effect of varying the different experimental parameters (frictional speed, catalyst dosage, dye type, and pH of the dye solution) was systematically investigated for its effect on the tribocatalytic degradation activity of SBN. The tribocatalytic activity of SBN was found to be pH-independent, achieving nearly 90% Rhodamine B (RhB) degradation across all tested pH conditions. Under optimum experimental conditions (30 mL, 10 mg/L, 0.1 g, and 900 rpm), the degradation of RhB surpassed 96% over a 150 min. Methyl violet (MV, ~ 97%) and RhB (~ 95%) showed higher degradation compared to the methylene blue (MB, ~ 46%) and the methyl orange (MO, ~ 23%) within 240 min at 600 rpm.