Journal
ANALYTICAL CHEMISTRY
Volume 89, Issue 17, Pages 8599-8603Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.7b02402
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Funding
- National Natural Science Foundation of China [61571198]
- Graduates' Innovation Fund of Huazhong University of Science and Technology [5003013001]
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A photocathode-based photocatalytic fuel cell (PFC) was fabricated and proposed as a self-powered sensor for p-nitrophenol (p-NP) detection. The PFC was comprised of a photocathode and an anode in separated chambers, which could generate suitable power output under photoirradiation to drive the sensing process. In this device, p-type PbS quantum dots-modified glass carbon electrode (GCE) served as the photocathode for the reduction of p-NP under photoirradiation while graphene-modified GCE was employed as the anode for the oxidation of ascorbic acid. In order to improve the selectivity of the PFC sensor, p-NP binding molecularly imprinted polymer (MIP) was introduced on the photocathode. Under optimal conditions, the open circuit voltage of the constructed PFC sensor was found to sensitively respond to p-NP in a wide concentration range from 0.05 mu M to 20 mu M. The proposed sensor exhibited high selectivity, good reproducibility, and stability, demonstrating the successful combination photocathode in construction of high-performance PFC self-powered sensors for pollutant monitoring.
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