Synthesis and characterization of silver nanoparticles doped reduced graphene oxide

MAPLE synthesis of reduced graphene oxide/silver nanocomposite electrodes: Influence of target composition and gas ambience

“…Probably, the greater inclusion of Ag nanoclusters between rGO sheets leads to their separation and opening of pathways to the electrolyte for reaching much higher effective area and, consequently, greater charge accumulation. Recently, Tran et al also observed an increase of the capacitive response of rGO membranes when decorated with silver nanoparticles[73]. In this work, notable silver oxidation and reduction peaks were present in the voltammograms between 0.2 and 0.5 V. Conversely, our results do not show these oxidation-reduction peaks, possibly confirming the enhancement of the electric double layer formation or pointing to a much greater contribution of the rGO functional groups to the electrochemical performance.…”

“…In contrast, we have a larger Ag signal in the film while increasing the amount of Ag in the target for each N 2 and Ar series, as it is observed in Figure S8. The analysis of the O1s XPS spectra ( Figure S7 and S8) shows that it can be deconvoluted in 3 peaks corresponding to the C-O and C=O bonds at 532 and 533.5 eV [71], respectively, and an additional peak at 531.6 eV which can be attributed to Ag 2 O [72,73]. Therefore, this indicates that the Ag is partially oxidized.…”

Fabrication of Ag@Co-Al Layered Double Hydroxides Reinforced poly(o-phenylenediamine) Nanohybrid for Efficient Electrochemical Detection of 4-Nitrophenol, 2,4-Dinitrophenol and Uric acid at Nano Molar Level

“…5B). The C-O-Co stretching vibration is observed at 763 cm −1 and the peak at 603 and 481 cm −1 may be due to Al-O and Ag-O bonds 35 .

Figure 5( A,B ) FT-IR and ( C ) DRS-UV-vis spectra of (a) pure Co-Al LDH, (b) Co-Al/PoPD and (c) Ag@Co-Al/PoPD samples.

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Fabrication and Evaluation of a Graphene Oxide-Based Capacitive Humidity Sensor

“…Compared with graphite, GO has a variety of reactive oxygen groups, such as carboxylic acids (COOH), carbonyls (C=O), epoxides (–O–) and hydroxyls (–OH), which are linked to a C-sp 3 structure network. Because of the existence of oxygen functional groups and some other structural defects, the interlayer distance of GO is greatly increased [ 12 , 13 , 14 , 15 ]. As can be seen in Figure 8 , the XRD pattern of GO shows a strong and sharp (0 0 2) peak at about 10.278°, which corresponds to an interlayer distance of about 8.606 Å.…”

“…GO is made up of single or several closely-spaced graphene sheets, and has sp 2 and sp 3 hybridized carbon atoms which can be considered as insulators [ 8 ]. GO is slightly soluble in water, and has plenty of oxygen-containing functional groups, such as epoxy, hydroxy (–OH), and carboxy (–COOH) groups, covering its surface [ 9 , 10 , 11 , 12 ]. GO materials have already attracted significant interest in various sensing applications because of their ultrasensitive detection properties [ 13 , 14 , 15 , 16 , 17 ], but little work has been done on evaluation of its critical properties for sensor applications, such as leakage current control, CMOS compatible performance, stability, linearity, etc.…”