A highly sensitive photoelectrochemical sensor with polarity-switchable photocurrent for detection of trace hexavalent chromium
Sensors and Actuators B: Chemical(2020)
Abstract
•A low cost photoelectrochemical (PEC) sensor is developed for hexavalent chromium ion (Cr(VI)).•This sensor displays polarity-switchable photocurrent with increasing Cr(VI) concentration.•Large detection range, from ppb level to ppm level, is realized by this sensor.
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Key words
Photoelectrochemical sensing,Hexavalent chromium,Graphene,Titanium dioxide,Photocurrent polarity,Charge transport
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