A highly sensitive fluorescence sensor for monitoring low concentrations of hydrogen peroxide was designed. The sensor employs the commercially available palladium or platinum metal on activated charcoal as catalysts to decompose hydrogen peroxide into water and molecular oxygen. The produced oxygen concentration can be measured in real time using an oxygen-sensitive layer doped with photostable oxygen probes. The sensor exhibits high sensitivity that is able to measure hydrogen peroxide concentration down to 20 ppb and can measure hydrogen peroxide concentration in the range of 0.1–100 ppm and 0.02–100 ppm, respectively. The response is fully reversible and the typical response time is less than one minute, which makes it suitable to continuously measure hydrogen peroxide over a long duration. Due to the excellent batch-to-batch consistency of palladium or platinum metal on activated charcoal, the sensor can be massively produced with good reproducibility and affordable price, which holds great potential for constructing sensors for industrial and practical applications.

中文翻译：

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高灵敏度且可重现的荧光传感器，用于连续测量亚 ppm 级的过氧化氢


设计了一种用于监测低浓度过氧化氢的高灵敏度荧光传感器。该传感器采用市售的活性炭上的钯或铂金属作为催化剂，将过氧化氢分解成水和分子氧。可以使用掺杂光稳定氧探针的氧敏感层实时测量产生的氧浓度。该传感器具有高灵敏度，能够测量低至 20 ppb 的过氧化氢浓度，并且可以分别测量 0.1–100 ppm 和 0.02–100 ppm 范围内的过氧化氢浓度。响应是完全可逆的，典型的响应时间小于 1 分钟，这使其适合长时间连续测量过氧化氢。由于钯或铂金属在活性炭上具有出色的批次间一致性，因此该传感器可以大规模生产，具有良好的重现性和实惠的价格，这对于构建用于工业和实际应用的传感器具有巨大潜力。