Fabrication of 3-methoxyphenol sensor based on Fe3O4 decorated carbon nanotube nanocomposites for environmental safety: Real sample analyses

Abstract

Iron oxide ornamented carbon nanotube nanocomposites (Fe3O4.CNT NCs) were prepared by a wet-chemical process in basic means. The optical, morphological, and structural characterizations of Fe3O4.CNT NCs were performed using FTIR, UV/Vis., FESEM, TEM; XEDS, XPS, and XRD respectively. Flat GCE had been fabricated with a thin-layer of NCs using a coating binding agent. It was performed for the chemical sensor development by a dependable I-V technique. Among all interfering analytes, 3-methoxyphenol (3-MP) was selective towards the fabricated sensor. Increased electrochemical performances for example elevated sensitivity, linear dynamic range (LDR) and continuing steadiness towards selective 3-MP had been observed with chemical sensor. The calibration graph found linear (R2 = 0.9340) in a wide range of 3-MP concentration (90.0 pM ~ 90.0 mM). The limit of detection and sensitivity were considered as 1.0 pM and 9×10−4 μAμM-1cm-2 respectively. The prepared of Fe3O4.CNT NCs by a wet-chemical progression is an interesting route for the development of hazardous phenolic sensor based on nanocomposite materials. It is also recommended that 3-MP sensor is exhibited a promising performances based on Fe3O4.CNT NCs by a facile I-V method for the significant applications of toxic chemicals for the safety of environmental and health-care fields.

Facile and efficient 3-chlorophenol sensor development based on photolumenescent core-shell CdSe/ZnS quantum dots

“…Therefore, a sensitive and comfort system is necessary to analyze the environmental (both ground and surface) and portable water. The existing analytical methods such as fluorescence and Raman spectrophotometry [44][45][46] , photo-electrochemical methods [47][48][49][50] , chromatography 51,52 , chemi-luminescence [53][54][55] , and electrochemical methods 29,[56][57][58][59][60] are used widely to detect the chlorophenol in aqueous medium. Among the chlorophenol detection methods, the electrochemical method has better advantages and the electrochemical method based on current versus potential is becoming more popular to detect directly the toxic chemicals which are environmental unsafe and carcinogenic [61][62][63][64] .…”

Radar Absorption Performance of Fe3O4/AC/PANI Nanocomposites Prepared from Natural Iron Sand

“…Theoretically, electrons in the outer shell of an atom absorbing radiation energy shift to a level with higher energy or called electron excitation [35]. Thus, the absorbance of the nanocomposite is related to the energy used by electrons to move from the valence band to the conduction band (excitation) called the energy gap [36].…”

“…where α is the absorption coefficient, A is the effective mass of the electron, h is the Planck constant which is 6.55×10 -34 Js, and v is the frequency [35]. The energy gap values were analyzed by using the Tauc plot method, where the energy gap is an intercept on the x-axis of the graph of the relationship between hv and (αhv) 2 .…”

d-Glucose sensor based on ZnO·V2O5 NRs by an enzyme-free electrochemical approach

“…The UV-Vis spectra of the ZnO NPs, V 2 O 5 NRs, and ZnO$V 2 O 5 NRs were recorded at 200-800 nm and expansive absorption bands were found (Table S1 † Table S1 †). [23][24][25][26][27][28] BGEðeVÞ ¼ 1240 Based on the XRD study, it can be suggested that a signicant amount of crystalline ZnO$V 2 O 5 was presented in the prepared NRs. 3,29,30 The average particle diameter (i.e., crystallite size) and lattice strains of the NRs were calculated using Scherrer's formula (eqn x), where D p ¼ average particle diameter (nm), l ¼ X-ray wavelength ( A), b ¼ line broadening NRs were collected at lower to higher magnication ( Fig.…”