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<p>Trace Rhodamine B (RhB) in water has acute toxicity to humans. In this work, quartz crystal microbalance (QCM) technology has emerged as a promising candidate to detect RhB in water. we synthesized hollow manganese dioxide (MnO<sub>2</sub>) microspheres via a solvothermal approach, which served as the sensing material in a QCM based sensor designed for RhB detection in water. Notably, this sensor demonstrated a detection limit of 1&#xa0;ppb, with a frequency shift of approximately − 32&#xa0;Hz achieved within 47&#xa0;s. Furthermore, the dynamic response, selectivity, and anti-interference of the sensor were evaluated. This work emphasizes the potential of this QCM based RhB detection technology as a fast, cost-effective solution for water quality monitoring.</p>

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Hollow MnO2 microspheres for detecting ppb concentration of Rhodamine B in water

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Luyu Wang,
  • Jia Song,
  • Chunyang Yu

摘要

Trace Rhodamine B (RhB) in water has acute toxicity to humans. In this work, quartz crystal microbalance (QCM) technology has emerged as a promising candidate to detect RhB in water. we synthesized hollow manganese dioxide (MnO2) microspheres via a solvothermal approach, which served as the sensing material in a QCM based sensor designed for RhB detection in water. Notably, this sensor demonstrated a detection limit of 1 ppb, with a frequency shift of approximately − 32 Hz achieved within 47 s. Furthermore, the dynamic response, selectivity, and anti-interference of the sensor were evaluated. This work emphasizes the potential of this QCM based RhB detection technology as a fast, cost-effective solution for water quality monitoring.