研究目的
To detect perfluorobutanesulfonic acid (PFBS) in water using a low-cost optical chemical sensing strategy based on plastic optical fibers and molecularly imprinted polymers (MIPs), for smart cities applications.
研究成果
The SPR-POF-MIP sensor demonstrates the potential for low-cost, in situ, and remote detection of PFBS in water, with a detection limit lower than 1 ppb. This approach is promising for monitoring pollutants in water for smart cities applications, offering advantages over traditional expensive methods.
研究不足
The study focuses on laboratory conditions and preliminary data for PFBS detection. Future work is needed to integrate the sensor system into a real-world smart cities application and to test its performance in various water quality scenarios.
1：Experimental Design and Method Selection:
The study employs a low-cost optical chemical sensing strategy using plastic optical fibers (POFs) and molecularly imprinted polymers (MIPs) for the detection of PFBS in water. The SPR-POF-MIP sensor platform is used for spectral interrogation.
2：Sample Selection and Data Sources:
Water samples with varying concentrations of PFBS are used to test the sensor's response.
3：List of Experimental Equipment and Materials:
Plastic optical fibers based on PMMA core and fluorinated polymer cladding, photoresist S1813 layer, sputtering machine for gold film deposition, halogen lamp, spectrometer, LED, photodetectors, digital oscilloscope, Raspberry Pi for data acquisition.
4：Experimental Procedures and Operational Workflow:
The POF sensor is prepared by removing the cladding, applying a photoresist layer, and sputtering a gold film. The MIP receptor layer is deposited on the SPR sensor. The sensor's response to PFBS in water is measured using spectral and amplitude mode setups.
5：Data Analysis Methods:
The resonance wavelength shift is analyzed to determine PFBS concentration. Hill fitting is used to model the dose-response curve.
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Halogen Lamp
HL–2000–LL
Ocean Optics
Light source for the spectral interrogation setup.
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Spectrometer
USB2000+UV–VIS-ES
Ocean Optics
Used to measure the transmitted light spectrum.
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Plastic Optical Fiber
Used as the core component of the SPR sensor for detecting PFBS in water.
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LED
Light source for the amplitude mode setup.
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Photodetectors
Used to detect light in the amplitude mode setup.
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Digital Oscilloscope
Connected to a laptop for data acquisition in the amplitude mode setup.
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Raspberry Pi
Pi 2 Model B
Raspberry
Single-board computer used for automatic data acquisition from the sensor system.
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