Sensitive electrochemical sensor for the determination of pentachlorophenol in fish meat based on ZnSe quantum dots decorated multiwall carbon nanotubes nanocomposite

Shao, Feng; Yang, Ran; Ding, Xiaojie; Li, Jianjun; Guo, Cheng; Qu, Lingbo

doi:10.1007/s11581-015-1512-1

Cited by 21 publications

(5 citation statements)

References 33 publications

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“…The obtained regression equation was Ep(V)=0.849+0.036 ln ν (R=0.9927). The positive shift of peaks with increase in scan rate clearly reflects a surface confined process consistent with previous reports . This adsorption effect is due to the small size and high surface area of the ZnSe QDs nanoparticles which enhanced the detection of cadmium ions following their adsorption.…”

Section: Resultsmentioning

confidence: 88%

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

et al. 2018

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This work describes for the first time the employment of water soluble GSH‐ZnSe QDs stabilized by XG and MWCNT for electrode modification in the detection of Cd ions in a highly sensitive and selective manner resulting from the unique structure and surface chemistry of the used QDs. The surface of a glassy carbon (GC) electrode was modified through casting a thin layer of multiwalled carbon nanotubes (MWCNT) followed by a complex layer of ZnSe quantum dots (QDs) stabilized by xanthan gum (XG). Due to the electrocatalytic properties of MWCNT and electroanalytical performance of ZnSe‐XG complex, the new modified electrode significantly improves the sensitivity and selectivity of Cd(II) detection and exhibits enhanced performance in comparison to bare GC, ZnSe/GC and ZnSe/MWCNT/GC electrodes. Strong interactions between ZnSe QDs and XG resulting from hydrogen bonding and complexing association led to stabilization of ZnSe QDs and higher affinity towards Cd(II) ions adsorption compared to a ZnSe QDs film alone. The modified electrode showed linear response in a wide concentration range from 100 nM to 5 μM (R2=0.9967) along with a high sensitivity of 156.6 nA ⋅ mol−1 ⋅ L−1 and a low detection limit of 20 nM. The electrode shows high selectivity to Cd with negligible interference from other metal ions and salts.

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Section: Resultsmentioning

confidence: 88%

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

et al. 2018

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“…In general, for a completely irreversible electrode process, a is assumed to be 0.5. 36 Therefore, the number of electron transfers (n) can be calculated to be about 2.3, which proves that PCP lost two electrons to form tetra-chloro-benzoquinone (TCQ) (inset of Scheme 1). TCQ belongs to the benzoquinone species, which is well known to be capable of quenching the anodic ECL of Ru(bpy) 3 2+ * via energy transfer.…”

Section: +mentioning

confidence: 97%

Determination of pentachlorophenol by anodic electrochemiluminescence of Ru(bpy)₃²⁺ based on nitrogen-doped graphene quantum dots as co-reactant

Luo

et al. 2017

RSC Adv.

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Sensitive and quantitative analysis of pentachlorophenol (PCP) is especially important in the field of ecology and agriculture. Herein, a highly sensitive and stable Ru(bpy) 3 2+-based anodic electrochemiluminescence (ECL) system utilizing nitrogen-doped graphene quantum dots (NGQDs) as a novel co-reactant was firstly constructed to detect PCP. In this system, Ru(bpy) 3 2+ was used as luminophor, while NGQDs were applied as co-reactant in place of the toxic and volatile tripropylamine. The novel co-reactant not only promoted the luminous efficiency of Ru(bpy) 3 2+ , but also improved the stability of the ECL system. In addition, the enhancement mechanism of NGQDs on Ru(bpy) 3 2+ and quenching mechanism of PCP on Ru(bpy) 3 2+/NGQDs were investigated in detail. Under the optimum conditions, the as-fabricated sensor for ultrasensitive PCP determination expressed a wider linear range of 1 Â 10 À15 to 1 Â 10 À5 g mL À1 and a lower detection limit of 2 Â 10 À17 g mL À1 with good stability and repeatability. Furthermore, based on the distinctive advantages of the novel ECL sensor, it was successfully used to detect PCP in tap water and river water, and satisfactory recoveries were obtained.

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“…The data about the detection limit and the linear potential is not given, since the purpose of the paper was to show that it is possible to separate pesticides from two classes of compounds (organophosphates and carbamates) on the basis of the fact that pesticides from the carbamate group have a peak at +1.4 V, and those of the organophosphate group at -0.6 V (Selva et al, 2017.). The applied modifiers are very diverse, ranging from those based on carbon nanoparticles (Teadoum et al, 2016;Xu F. et al, 2017;Xu G. et al, 2017;Irandoust & Haghighi 2016;Yao et al, 2014;Feng et al, 2015;Yang et al, 2015;), to combinations of various types of nanoparticles with biocomponents (Cai et al, 2014;Chauhan et al, 2015;Guler et al, 2017;Zhang et al, 2015).…”

Section: Glassy Carbon Electrodementioning

confidence: 99%

A mini-review of electroanalytical methods for pesticides quantification

Jevtić¹,

Stanković²,

Jokić³

et al. 2019

Univ thought Publ nat sci

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This review paper shows the progress made in the last five years in electrochemical methods applied for the purpose of detection and quantification of pesticides -nowadays the most serious pollutants of the environment. Most pesticides can be successfully analyzed by chromatographic techniques, but because of high prices and immobility of the apparatus, the complexity of the method and the necessary special preparation of the sample s, electrochemical methods have been recognized as an excellent alternative solution due to their advantages in speed, economy, simplicity and no exhaustive sample preparation. As the main limitation for use of this methods is electrochemical inactivity of many pesticides, this paper gives the essence of all elctroanalytical methods for pesticide quantification applied in last period, with an overview of the electrode materials and modifiers applied in a purpose to enhance analytical procedures application and characteristics of electrochemical sensors.

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Sensitive electrochemical sensor for the determination of pentachlorophenol in fish meat based on ZnSe quantum dots decorated multiwall carbon nanotubes nanocomposite

Cited by 21 publications

References 33 publications

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

Determination of pentachlorophenol by anodic electrochemiluminescence of Ru(bpy)₃²⁺ based on nitrogen-doped graphene quantum dots as co-reactant

A mini-review of electroanalytical methods for pesticides quantification

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Sensitive electrochemical sensor for the determination of pentachlorophenol in fish meat based on ZnSe quantum dots decorated multiwall carbon nanotubes nanocomposite

Cited by 21 publications

References 33 publications

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

Ultrasensitive and Selective Detection of Cd(II) Using ZnSe‐Xanthan Gum Complex/CNT Modified Electrodes

Determination of pentachlorophenol by anodic electrochemiluminescence of Ru(bpy)32+ based on nitrogen-doped graphene quantum dots as co-reactant

A mini-review of electroanalytical methods for pesticides quantification

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Determination of pentachlorophenol by anodic electrochemiluminescence of Ru(bpy)₃²⁺ based on nitrogen-doped graphene quantum dots as co-reactant