| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1165712 | Analytica Chimica Acta | 2012 | 6 Pages |
In this paper, the photoelectrochemical behavior of graphene-TiO2 (G-TiO2) nanohybrids was investigated in the visible region and a new photoelectrochemical sensor for sensitive determination of nicotinamide adenine dinucleotide (NADH) was proposed. Under visible light, the G-TiO2 nanohybrids possessed enhanced photocurrent, which was nearly 5 times than that of pure TiO2 nanocrystals (NCs). Based on the enhanced photocurrent of G-TiO2 nanohybrids toward NADH, a new photoelectrochemical methodology for ultrasensitive determination of NADH was developed. The proposed sensor showed linearly enhanced photocurrent by increasing the NADH concentration from 1.0 × 10−8 to 2.0 × 10−3 M with a low detection limit of 3.0 × 10−9 M. Furthermore, this sensor exhibited good selectivity and stability towards NADH determination. This strategy opens up a new avenue for the application of graphene-based hybrids in the field of photoelectrochemical sensing and monitoring.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The photoelectrochemical behavior of G-TiO2/GCE was investigated in visible region. ► The G-TiO2/GCE possessed enhanced photocurrent than pure TiO2 nanocrystals. ► A photoelectrochemical sensor for ultrasensitive determination of NADH was proposed. ► The proposed sensor showed linear range of 1.0 × 10−8 to 2.0 × 10−3 M for NADH detection. ► This strategy largely reduces the destructive effect of UV light to biomolecules.
