期刊
SENSORS
卷 19, 期 22, 页码 -出版社
MDPI
DOI: 10.3390/s19224901
关键词
cadmium ion; carbon fiber electrode; nano-copper; sensitivity for cadmium ion detection; charge transferability
资金
- National Natural Science Fund of China [31971781, 61901239]
- Taishan Scholars Young Expert [tsqn201812087]
Enrichment of cadmium ion (Cd2+) from the environment may lead to kidney disease and weakened immunity in the body. Current techniques are not convenient enough to measure Cd2+ concentration in the environment due to low sensitivity and poor linear range. In this paper, a new measurement technique is proposed using a new sensing electrode made of nano-copper-enhanced carbon fiber. Nano-copper was deposited onto the surface of carbon fiber to enhance the current concentration and mass transfer rate of Cd2+ during measurement, which improved the electrochemical detection sensitivity significantly (by up to 3.7 x 10(8) nA/nM) and broadened the linear range to 10 similar to 10(5) nM. This device provides a low-cost solution for measuring Cd2+ concentration in the environment.
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