Abstract:This paper describes the preparation, characterization and electroanalytical application of a composite consisting of titanium phosphate modified with nickel hexacyanoferrate. Titanium phosphate (TiPh) was formed from the reaction of titanium isopropoxide with H 3 PO 4 and deionized water. Next, the reaction of TiPh was performed with a metal ion (Ni +2 ) and potassium Hexacyanoferrate, designated as TiPhNIHCF. Spectroscopic techniques such as vibrational spectroscopy, X-ray diffraction (XRD), diffuse reflecta… Show more
“…22 TiPs were synthesized and successfully used to incorporate silver ions. 17,23,24 In most synthesis process, the templates, including surfactants, alkyl amines and other organic molecules, are usually used to direct the formation of TiPs. 17,25,26 More and more attention is paid on template-free method to synthesize nanoscale materials.…”
Well-ordered layered, elongated hexagonal a-titanium phosphate (a-TiP) nanoplates were synthesized in supercritical ethanol without any template. The morphologies and structures of elongated hexagonal a-TiP nanoplates were controlled by temperature. The possible growth mechanism of the novel a-TiP structure was also proposed on the basis of powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared and X-ray photoelectron spectroscopy.
“…22 TiPs were synthesized and successfully used to incorporate silver ions. 17,23,24 In most synthesis process, the templates, including surfactants, alkyl amines and other organic molecules, are usually used to direct the formation of TiPs. 17,25,26 More and more attention is paid on template-free method to synthesize nanoscale materials.…”
Well-ordered layered, elongated hexagonal a-titanium phosphate (a-TiP) nanoplates were synthesized in supercritical ethanol without any template. The morphologies and structures of elongated hexagonal a-TiP nanoplates were controlled by temperature. The possible growth mechanism of the novel a-TiP structure was also proposed on the basis of powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared and X-ray photoelectron spectroscopy.
“…The detection limits reported at different analytical methods for AAP related dipyrone derivative drugs are tabulated in Table 1 . The proposed method was better than other reported electrochemical methods [31] , [38] , [54] , [55] , [56] . Fig.…”
Section: Resultsmentioning
confidence: 70%
“…Nano-Riboflavin-modified glassy carbon electrode(voltammetry) 0.0502 μM [55] 4. Titanium phosphate/nickel hexacyanoferrate mod graphite electrode(voltammetry) 3.75×10 −4 M [56] 2) 4-Aminophenazone Graphite pencil electrode(voltammetry) 0.45×10 −7 M [38] 3) 4-Aminoantipyrine MWCNT-CTAB modified glassy carbon electrode 1.63×10 −10 M Present work …”
A multi-walled carbon nanotube (MWCNT)-cetyltrimethylammonium bromide (CTAB) surfactant composite modified glassy carbon electrode (GCE) was developed as a novel system for the determination of 4-aminoantipyrine(AAP). The oxidation process was irreversible over the pH range studied and exhibited a diffusion controlled behavior. All experimental parameters were optimized. The combination of MWCNT-CTAB endows the biosensor with large surface area, good biological compatibility, electricity and stability, high selectivity and sensitivity. MWCNT-CTAB/GCE electrode gave a linear response for AAP from 5.0×10−9 to 4.0×10−8 M with a detection limit of 1.63×10−10 M. The modified electrode showed good selectivity against interfering species and also exhibited good reproducibility. The present electrochemical sensor based on the MWCNT-CTAB/GCE electrode was applied to the determination of AAP in real samples.
“…The proposed method thus appears to be better than other reported electrochemical methods. 5,21,23 The precision of the method was investigated by intraday and interday determinations of 4-AP at two different concentrations (n = 5) within the linear range. The accuracy of the methods expressed as percentage bias and percentage RSD within and between days is reported in Table 2, which indicates high precision of the proposed method.…”
An analytical method for the determination of 4-aminophenazone using cyclic and differential-pulse voltammetry has been developed. The oxidation process was shown to be irreversible over the pH range 3.0−11.2. The dependence of the current on pH, concentration, and scan rate was investigated to optimize the experimental conditions for the determination of 4aminophenazone. The number of electrons transferred in the oxidation process was calculated, and a probable oxidation mechanism was proposed. In the range of (1.0 × 10 −6 )−(1.6 × 10 −5 ) M, the current measured by differential-pulse voltammetry as a function of the concentration of 4-aminophenazone with a detection limit of 0.458 × 10 −7 M with good selectivity and sensitivity exhibited a good linear relationship. The proposed method was applied to the determination of 4-aminophenazone in a real sample.
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