1. Sonoelectrochemical exfoliation of defective black phosphorus nanosheet with black phosphorus quantum dots as a uric acid sensor.
- Author
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Wang, Tzu-Pei, Cheng, Tain-Kei, Chen, Po-Yu, and Lee, Chien-Liang
- Subjects
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QUANTUM dots , *URIC acid , *ULTRASONIC waves , *AMPEROMETRIC sensors , *DETECTORS - Abstract
[Display omitted] • dBPN/BPQD using sonoelectrochemical method is successfully prepared. • 5-9 defect, 5-7-7-5 defect, and 5-8-5 defect vacancies on the dBPN/BPQD are observed. • The mass activities of dBPN/BPQD and rGO as UA sensors are studied. • The sensitivity of dBPN/BPQD as UA sensor is 474.2 μA mM−1 cm−2. • The data using serum samples demonstrate the potential of dBPN/BPQD as a UA sensor. To maintain human health, the development of rapid uric acid (UA) sensing is crucial. In this study, defective black phosphorus nanosheets with black phosphorus quantum dots (dBPN/BPQDs) were successfully and rapidly prepared by sonoelectrochemical exfoliation. In this process, the intercalation of phosphate ions into the black phosphorus working electrode was improved by coupling ultrasonic radiation with a high intercalating potential (8 V vs. Ag/AgCl/3M). The dBPN/BPQDs with various vacancies (5–9 defects, 5-7-7-5 defects, and 5-8-5 defect vacancies) exhibited a remarkable mass activity ( j m , 1.22 × 10−3 mA μg−1) for uric acid oxidation, which was 5.92 times greater than that of reduced graphene oxide (rGO) (2.06 × 10−4 mA μg−1). In addition, the sensitivity of the dBPN/BPQD UA sensor was 474.2 μA mM−1 cm−2 in the linear analysis range of 0.1–1.3 mM. The sensitivity of the sensor was apparently higher than 67.7 μA mM−1cm−2 for rGO. The data from real sample experiments using serum showed that the dBPN/BPQD catalyst had high recoveries (97.3 %–100.2 %) and low related standard deviation (0.44 %–1.52 %). The dBPN/BPQDs exhibited the potential as an amperometric sensor to detect UA without needing enzymes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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