Label-free photoelectrochemical aptasensing of diclofenac based on gold nanoparticles and graphene-doped CdS

Bismuth Vanadate/Reduced Graphene Oxide Nanocomposite Electrode for Photoelectrochemical Determination of Diclofenac in Urine

“…The photocurrent optimization experiments (supplementary information) were based on number of BiVO 4 layers deposited over FTO, distance between light source (LED) and photoelectrochemical cell, wavelength and applied power of LED. Figure presents the transient photocurrents signals for the comparison of the different work electrodes (FTO; FTO/rGO; FTO/BiVO 4 and FTO/BiVO 4 /rGO), under an overpotential of +0.2 V, necessary to promote the DCF electro‐oxidation .…”

“…Considering that the photocurrent efficiency is directly related to the drug electro‐oxidation, the applied potential was studied based on the DCF electro‐oxidation found in the literature . Figure a presents the results of the photocurrents in the absence of DCF and in the presence of 1.0×10 −4 mol L −1 DCF at potentials varying from +0.1 V to +0.5 V. In the potential range studied, the value of +0.2 V presented lower displacement in the base line and higher photocurrent when compared with the response at the potential of +0.1 V. In addition, at lower oxidation potentials the effect of possible interfering substances is decreased.…”

Platinum and Iridium Oxide Co-modified TiO2 Nanotubes Array Based Photoelectrochemical Sensors for Glutathione

“…Diverse nanomaterials, such as Au [8], ZnO [9,10], CdS [11,12], TiO 2 [13,14], and porphyrin [15,16], have been exploited as electrodes. Among them, TiO 2 nanomaterials have been widely investigated due to their high PEC activity, stable performance, good biological compatibility, and obvious surface effect [17][18][19].…”

The synthesis of graphene oxide covalently linked with nickel tetraamino phthalocyanine: A photoelectrochemical sensor for the analysis of rifampicin irradiated with blue light

“…[6] Currently, RIF quantitation is performed using fluorescence spectroscopy, [7,8] ultraviolet-visible (UV-vis) spectroscopy, [9] high-performance liquid chromatography (HPLC)-ultraviolet spectroscopy, [10] and HPLCmass spectrometry, [11] which required much time and incurred high equipment and routine maintenance costs. [12][13][14][15] Photosensitive materials such as nanosemiconductors, Ru(II) complexes, organic compounds, composite photoelectric materials, and biological macromolecules [16][17][18][19] have been extensively used in the fields of bioanalysis and drug/contaminant quantitation. Photoelectrochemical (PEC) methods have particularly wide application prospects due to the above inherent advantages as well as their accuracy.…”

“…The design of suitable PEC-sensing materials is necessary for the development of highperformance RIF analysis techniques. [12][13][14][15] Photosensitive materials such as nanosemiconductors, Ru(II) complexes, organic compounds, composite photoelectric materials, and biological macromolecules [16][17][18][19] have been extensively used in the fields of bioanalysis and drug/contaminant quantitation. [20][21][22] In particular, phthalocyanine (Pc) is an organic ligand with a porphyrin-like structure [23,24] forming numerous macrocyclic metal complexes, which have recently emerged as promising materials for catalytic dehydrogenation, photoelectric conversion, biological simulation, and fuel cell operation due to exhibiting excellent catalytic activity and photochemical, thermal, and chemical stability.…”