Affiliation:
1. Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Photoelectric Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
2. Guangdong Provincial Key Laboratory of Psychoactive Substances Monitoring and Safety, Anti-Drug Tethnology Center of Guangdong Province, Guangzhou 510230, China
Abstract
A simple and low-cost cathodic photoelectrochemical (PEC) sensor based on Bi2WO6@g-C3N4 was designed for dopamine (DA) detection. The Bi2WO6 nanoflower was first prepared using a simple hydrothermal method followed by the combination with g-C3N4 nanosheet to form the Bi2WO6@g-C3N4 heterostructure. The heterostructure can extend the absorbance to the visible region and accelerate the transfer of charge carriers. Furthermore, DA easily coordinates with exposed Bi3+ on the Bi2WO6 surface and forms the charge-transfer complex to further enhance the cathodic photocurrent. Under optimal conditions, there are two linear relationships between the concentration of DA and photocurrent intensity. The linear ranges are 0.1–10 µM and 10–250 µM, with a sensitive detection limit (LOD) of 28 nM. Notably, the real sample of human blood serum analysis further revealed the accuracy and feasibility of the Bi2WO6@g-C3N4-based PEC platform. Convincingly, the heterostructure of Bi2WO6 and g-C3N4 opened up a new avenue for the construction of DA analysis.
Funder
National Key R&D Program of China
National Natural Science Foundation of China
University-Industry Collaborative Education Program of Ministry of Education of China
Guangdong Basic and Applied Basic Research Foundation
Department of Science and Techniques of Guangdong Province
Department of Guangdong Provincial Public Security
Science and Technology Projects in Guangzhou
Department of Science & Technology of Guangdong Province
Guangzhou Municipal Science and Technology Bureau
Tertiary Education Scientific research project of Guangzhou Municipal Education Bureau
Subject
Physical and Theoretical Chemistry,Analytical Chemistry
Cited by
2 articles.
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