Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 783, Issue -, Pages 176-181Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2016.11.025
Keywords
Photoelectrochemical analysis; TiO2 nanotubes; CdS nanoparticles; Covalently grafting; Exogenous and endogenous H2S
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Funding
- National Natural Science Foundation of China [21575051, 21475052]
- Foundation of University of Jinan [XBS164]
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A facile photoelectrochemical sensor for the determination of hydrogen sulfide (H2S) is developed. Photocurrent is generated through the grafting of CdS nanoparticles covalently and in situ onto TiO2 nanotubes. The surface of TiO2 nanotubes was modified by a layer of thioglycolic acid (TGA) to introduce thiol groups which can adsorb and immobilize Cd ions. CdS nanoparticles would be formed onto TiO2 nanotubes after treating with exogenous or endogenous H2S. Both the exogenous and H2S released from cancer cells were detected based on the photoelectric properties of CdS nanoparticles. And a wide linear range (10 nM-10(6) nM) was achieved with a detection limit of 0.7 nM. (C) 2016 Elsevier B.V. All rights reserved.
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