A voltammetric sensor based on GO–MWNTs hybrid nanomaterial-modified electrode for determination of carbendazim in soil and water samples

Luo, Siyi; Yuan-hui, WU; Gou, Hua

doi:10.1007/s11581-013-0868-3

Cited by 93 publications

(34 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The latter was calculated considering the lesser measurement ( I s ) as 3 × 0.0041 (noise of measurement). In the case of LOD, this value is in the same range of detection of other works and is more than enough to detect lethal concentration for two earthworm species . Furthermore, the advantage of SERS is the unequivocal detection, i.e.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, an alternative is the use of spectrofluorimetric techniques [23,24] and electrochemical methods. [25,26] Recently, Ashrafi et al [25] reported the detection of MBC with carbon paste electrode modified by tricresyl phosphate using voltammetry, reaching a limit of detection of 3.0 × 10 À7 mol l À1 . Luo et al, [26] using glassy carbon electrode modified with graphene oxide and multi-walled carbon nanotubes, show that the anodic peak is linear with MBC concentration, reaching a detection limit of 5.0 × 10 À9 mol l À1 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detection and quantitative analysis of carbendazim herbicide on Ag nanoparticles via surface‐enhanced Raman scattering

Furini¹,

Sánchez-Cortés

López‐Tocón

et al. 2015

J Raman Spectroscopy

View full text Add to dashboard Cite

Carbendazim (MBC) is a fungicide widely used in agriculture, and there are serious concerns regarding the health risks that could be caused by this fungicide. Here, we explore its ultrasensitive detection by surface-enhanced Raman scattering (SERS). First, to obtain maximum SERS signal, the adsorption of the target molecule onto metallic surface is essential. Therefore, we study the adsorption of the MBC onto the nanoparticle surface by SERS under different experimental conditions, such as different synthesis methods of nanoparticle, variable excitation wavelength, and fungicide concentration with the aim to detect MBC at low concentrations. Experiments are carried out with three kinds of colloidal nanoparticles: Ag and Au reduced by citrate and Ag reduced by hydroxylamine. However, mainly Ag colloids are highly efficient in the SERS detection of MBC. In addition, theoretical calculations of MBC Raman spectrum and that of the surface complex are used to help with the understanding the mechanisms responsible for the interaction between MBC and Ag. Ultraviolet-visible absorption spectroscopy showed displacement to the red of the plasmon resonance of Ag colloid in the presence of MBC.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection and quantitative analysis of carbendazim herbicide on Ag nanoparticles via surface‐enhanced Raman scattering

Furini¹,

Sánchez-Cortés

López‐Tocón

et al. 2015

J Raman Spectroscopy

View full text Add to dashboard Cite

show abstract

“…The chemical structure of GO renders the material amphifilic in nature similar to that of surfactant and therefore demonstrate high solubility in aqueous-based solvents [14,[16][17][18]. This unique quality inherent within the GO structure enables the material to act as an effective stabilizer to isolate hydrophobic materials such as carbon nanotube and water-insoluble drugs [17][18][19][20][21][22][23][24][25][26][27]. The main advantage of having GO as surfactant to stabilize carbon allotropes lies on its chemical compound which mostly contains conjugated carbon to carbon bonding as well as the two-dimensional configuration which serves to improve material functionalities [28].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the use of graphene oxide as novel surfactant to stabilize weakly charged graphene nanoplatelets

Kazi¹,

Badarudin²,

Zubir³

et al. 2016

Nano Online

View full text Add to dashboard Cite

This paper presents a unique synergistic behavior between a graphene oxide (GO) and graphene nanoplatelet (GnP) composite in an aqueous medium. The results showed that GO stabilized GnP colloid near its isoelectric point and prevented rapid agglomeration and sedimentation. It was considered that a rarely encountered charge-dependent electrostatic interaction between the highly charged GO and weakly charged GnP particles kept GnP suspended at its rapid coagulation and phase separation pH. Sedimentation and transmission electron microscope (TEM) micrograph images revealed the evidence of highly stable colloidal mixtures while zeta potential measurement provided semi-quantitative explanation on the mechanism of stabilization. GnP suspension was confirmed via UV-vis spectral data while contact angle measurement elucidated the close resemblance to an aqueous solution indicating the ability of GO to mediate the flocculation prone GnP colloids. About a tenfold increase in viscosity was recorded at a low shear rate in comparison to an individual GO solution due to a strong interaction manifested between participating colloids. An optimum level of mixing ratio between the two constituents was also obtained. These new findings related to an interaction between charge-based graphitic carbon materials would open new avenues for further exploration on the enhancement of both GO and GnP functionalities particularly in mechanical and electrical domains.

show abstract

“…In other work, Luo et al. 2 have developed an electrochemical sensor using a glassy carbon electrode (GCE) modified with a hybrid mixture of graphene oxide and carbon nanotubes (CNT). The authors applied the sensor to determine CBZ in tap water.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Design for Simultaneous Determination of Carbendazim and Fenamiphos by Electrochemical Method

et al. 2015

View full text Add to dashboard Cite

This study is aimed to develop an electroanalytical methodology using a boron‐doped diamond electrode (BDD) associated with experimental design in order to determine simultaneously and selectively carbendazin (CBZ) and fenamiphos (FNP) pesticides. In previous studies oxidation peaks were observed at 1.10 V (CBZ) and 1.20 V (FNP), respectively, with characteristics of irreversible processes controlled by diffusion of species (in pH 2.0 (CBZ) and pH 3.5 (FNP)) using a BR buffer 0.1 mol L−1 as support electrolyte. The differences between the potentials for both pesticides, (about 100 mV) indicate the possibility of selective determination of FNP and CBZ. However, employing an equimolar mixture of analytes, the peaks overlap to form a single oxidation peak. Thus, we used a 34 full factorial design with four parameters to be analyzed in three levels, in order to obtain the optimized parameters for the separation of the peaks. The best separation conditions were pH 5.0, square wave frequency of 300 s−1, pulse amplitude of 10 mV and scan increment of 2 mV. These parameters were used to obtain the calibration curves of CBZ and FNP. For CBZ the analytical curve was obtained in the concentration range of 4.95×10−6 to 6.90×10−5 mol L−1 with good sensitivity and linearity (0.175 A/mol L−1 and 0.999, respectively). The limits of detection (LOD) and quantification (LOQ) were 1.6×10−6 mol L−1 and 5.5×10−6 mol L−1, respectively. For FNP the linear concentration interval was 4.95×10−6 to 3.67×10−5 mol L−1, with a sensitivity of 0,207 A/mol L−1 and linearity of 0.996. The LOD and LOQ were 4.1×10−6 mol L−1 and 13.7×10−6 mol L−1, respectively. Using these experimental conditions it was possible to separate the oxidation peaks of CBZ (Ep=1.08 V) and FNP (Ep=1.23 V). The electroanlytical method was applied in lemon juice samples. The recovery values were 110.0 % and 92.5 % for CBZ and FNP, respectively. The results showed that the developed method is suitable for application in foodstuff samples.

show abstract

A voltammetric sensor based on GO–MWNTs hybrid nanomaterial-modified electrode for determination of carbendazim in soil and water samples

Cited by 93 publications

References 12 publications

Detection and quantitative analysis of carbendazim herbicide on Ag nanoparticles via surface‐enhanced Raman scattering

Detection and quantitative analysis of carbendazim herbicide on Ag nanoparticles via surface‐enhanced Raman scattering

Investigation on the use of graphene oxide as novel surfactant to stabilize weakly charged graphene nanoplatelets

An Experimental Design for Simultaneous Determination of Carbendazim and Fenamiphos by Electrochemical Method

Contact Info

Product

Resources

About