Photoelectrochemical Nanosensors

Sultan, Sundas; Nimal, Rafia; Aftab, Saima; Kurbanoğlu, Sevinç; Shah, Afzal; Özkan, Síbel A.

doi:10.1016/b978-0-12-816144-9.00007-9

Cited by 3 publications

(1 citation statement)

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“…12,13 As the PEC technique combines both electrochemical and optical techniques to analyze target molecules, it usually exhibits higher sensitivity and lower background current compared with the traditional electrochemical and optical methods. 12,14 A variety of photoactive nanomaterials (e.g. quantum dots, metal complexes, semiconductor particles and nano composites) have been developed for fabricating PEC sensor.…”

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confidence: 99%

A Highly Sensitive Visible-Light Photoelectrochemical Sensor for Pentachlorophenol Based on Synergistic Effect of 2D TiO₂ Nanosheets and Carbon Dots

Fu¹,

Zhang²,

Gan³

2020

J. Electrochem. Soc.

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A new visible-light photoelectrochemical (PEC) sensor based on 2D graphene-like TiO 2 nanosheets and carbon dots nanocomposites modified glassy carbon electrode (TiO 2 NSs/C-dots/GCE) is developed for pentachlorophenol (PCP) detection. The 2D TiO 2 NSs and C-dots are both synthesized by one-step solvothermal methods and the TiO 2 NSs/C-dots nanocomposites are prepared by a simple physical mixing method. The C-dots could effectively reduce the recombination of electrons and holes in the nanocomposites, improve the excitation conversion efficiency in visible-light area, and thus remarkably amplify the PEC signal. The PEC signal for PCP at the TiO 2 NSs/C-dots/GCE sensor is about 11-times and 3.2-times larger than that at the C-dots/GCE and TiO 2 NSs/GCE, respectively. The TiO 2 NSs/C-dots/GCE sensor exhibits a wide linear proportion to the PCP concentration in the range from 0.1 to 4.5 nM with a detection limit of 0.05 nM (3S N −1 ). Moreover, the TiO 2 NSs/C-dots/GCE sensor also shows high selectivity, excellent stability, and good repeatability in PCP determination. Furthermore, the TiO 2 NSs/C-dots/GCE sensor is further applied to determinate PCP in practical water samples.

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confidence: 99%