A non-enzymatic hydrogen peroxide sensor based on dendrimer functionalized magnetic graphene oxide decorated with palladium nanoparticles

Baghayeri, Mehdi; Alinezhad, Heshmatollah; Tarahomi, Mehrasa; Fayazi, Maryam; Ghanei-Motlagh, Masoud; Maleki, Behrooz

doi:10.1016/j.apsusc.2019.01.201

Cited by 161 publications

(48 citation statements)

References 40 publications

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“…As shown, no signals appeared for both EAGr/GCE and bare GCE, while an obvious and sharp cathodic peak was observed at +0.09 V which is corresponded to the reduction of PdNCs in the nanocomposite film. These results clearly indicated that the successful formation of PdNCs/EAGr nanocomposite sensor which are compatible with the electrochemical behavior of Pd nanostructures of other reported studies .…”

Section: Resultssupporting

confidence: 91%

“…These results indicated that the excellent electrocatalytic activity to H 2 O 2 reduction with the PdNCs/EAGr/GCE via two‐electron transfer process to produce H 2 O (Scheme ). This might be due to the presence of PdNCs in the nanocomposite structure provides a large active surface area, which therefore promoted the electron transfer process of H 2 O 2 reduction by increasing the reduction current and reduced the reduction peak potential .…”

Section: Resultsmentioning

confidence: 99%

“…Among of them, platinum nanoparticles (PdNPs) were used for designing different H 2 O 2 sensors due to its interesting properties, such as high conductivity and electrocatalytic activity that enhance the electron transfer process of H 2 O 2 as well as reduce the reduction overpotential . In addition, PdNPs composite Gr have been applied in order to improve and increase nanocomposite sensors activity for high sensitive H 2 O 2 sensors . Although, some literatures have showed great performance as H 2 O 2 sensors, still there is more effort to develop highly sensitive H 2 O 2 sensor in order to monitor releasing H 2 O 2 in biological system.…”

Section: Introductionmentioning

confidence: 99%

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Palladium Nanoclusters Uniformly Enveloped Electrochemically Activated Graphene for Highly Sensitive Hydrogen Peroxide Sensor

et al. 2019

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Nonenzymatic sensors based on a metals nanocomposite with high sensitivity, selectivity, and stability has been received considerable interest. In this study, a novel electrochemical nanocomposite sensor based on palladium nanoclusters (PdNCs) decorated electrochemically activated graphene (EAGr) was established for highly sensitive nonenzymatic H2O2 sensor. The PdNCs/EAGr nanocomposite was fabricated via an electrochemical activation of Gr by the potential cycling in the range of +0.6 to −1.8 V, followed by the electrodeposition of PdNCs at −0.4 V applied potential. The homogeneous dispersion of PdNCs/EAGr nanocomposite were characterized by scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), and linear sweep voltammetry (LSV). The PdNCs/EAGr nanocomposite electrode showed higher electrocatalytic activity towards the reduction of H2O2 in pH 7.0 of 0.1 M PBS by significantly enhancing the reduction peak current and reduced the reduction overpotential as well as eliminated other interfering species responses. The PdNCs/EAGr electrode displayed a wide linear range for H2O2 reduction from 1.0 to 1100 μM with limit of detection 0.02±0.01 μM. The higher sensitivity and selectivity as well as long‐time stability and excellent reproducibility obtained, indicating the proposed sensor is an effective H2O2 based sensor. In addition, the analytical application of the nancomposite sensor was successfully examined for the determination of H2O2 in the real sample of human urine indicating that the appreciable practicality of the nonenzymatic sensor for the determination of H2O2 in physiological fluids.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Palladium Nanoclusters Uniformly Enveloped Electrochemically Activated Graphene for Highly Sensitive Hydrogen Peroxide Sensor

et al. 2019

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“…In continuation of our previous researches on the design and application of heterogeneous and reusable solid catalysts in organic synthesis and MCRs, here we report an efficient and green method for the synthesis of 3,4‐disubstituted isoxazole‐5(4H)‐ones catalyzed by HAp nanoparticles (Scheme ).…”

Section: Resultsmentioning

confidence: 94%

Synthesis and characterization of nanocrystalline hydroxyapatite and its catalytic behavior towards synthesis of 3,4‐disubstituted isoxazole‐5(4H)‐ones in water

Maleki

Chahkandi

Tayebee

et al. 2019

Applied Organom Chemis

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In the present work, the nanocrystalline particles of hydroxyapatite (HAp) using an easy alkoxide‐based sol–gel technique including triethyl phosphate [PO (OC2H5)3] and Ca (NO3)2·4H2O as P and Ca precursors have been synthesized. The sample characterization was performed by X‐ray diffraction, Fourier transform‐infrared analysis, scanning electron microscopy, thermal analysis (thermogravimetric analysis/differential thermal analysis), and elemental analysis of energy‐dispersive X‐ray analysis. It is interesting that single phase of HAp was obtained at a low firing temperature of 500°C. Modified Scherrer equation as the Williamson−Hall method was applied for the measurement of crystallite size distributions and micro‐strain of the sample. The determined crystallite size by complementary technique of transmission electron microscopy has good consistency with those obtained from the Scherrer formula. Moreover, we reported the one‐pot synthesis of 3,4‐disubstituted isoxazole‐5(4H)‐ones through the aqueous solution reaction of three components of ethyl acetoacetate, hydroxylamine hydrochloride and various aromatic aldehydes at room temperature. This protocol offers several advantages, including a simple work‐up procedure, very short reaction times (under 25 min), in accordance with the principles of green chemistry, recyclability, excellent yields (87–98%) and environmentally friendly.

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“…With respect to our interest in the design, synthesis and characterization of novel heterogeneous nanocatalysts, we report a novel experimental protocol for preparation of Pd@MGO‐D‐NH 2 . As illustrated in scheme , the catalyst was prepared using an approach which includes several steps.…”

Section: Resultsmentioning

confidence: 99%

Immobilizing Pd nanoparticles on the ternary hybrid system of graphene oxide, Fe₃O₄ nanoparticles, and PAMAM dendrimer as an efficient support for catalyzing sonogashira coupling reaction

Tarahomi

Alinezhad

Maleki

2019

Applied Organom Chemis

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An alternative approach to develop a Pd catalyst based on dendrimerfunctionalized graphene oxide for C-C cross-coupling reactions is reported.Pd@MGO-D-NH 2 has been synthesized by incipient wet impregnation method. The structure of the catalyst was thoroughly characterized by a set of analytical techniques such as TEM, BET, SEM/EDS, FTIR, and elemental mapping analysis. Then, the catalytic activity of the catalyst was scrutinized for promoting sonogashira C-C coupling reaction. The results manifested that Pd@MGO-D-NH 2 was able to catalyze the coupling reaction to obtain high coupling yields in short reaction time. The results of present work are hoped to aid the development of new class of heterogeneous catalysts as the high performance candidate for industrial applications.

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A non-enzymatic hydrogen peroxide sensor based on dendrimer functionalized magnetic graphene oxide decorated with palladium nanoparticles

Cited by 161 publications

References 40 publications

Palladium Nanoclusters Uniformly Enveloped Electrochemically Activated Graphene for Highly Sensitive Hydrogen Peroxide Sensor

Palladium Nanoclusters Uniformly Enveloped Electrochemically Activated Graphene for Highly Sensitive Hydrogen Peroxide Sensor

Synthesis and characterization of nanocrystalline hydroxyapatite and its catalytic behavior towards synthesis of 3,4‐disubstituted isoxazole‐5(4H)‐ones in water

Immobilizing Pd nanoparticles on the ternary hybrid system of graphene oxide, Fe₃O₄ nanoparticles, and PAMAM dendrimer as an efficient support for catalyzing sonogashira coupling reaction

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A non-enzymatic hydrogen peroxide sensor based on dendrimer functionalized magnetic graphene oxide decorated with palladium nanoparticles

Cited by 161 publications

References 40 publications

Palladium Nanoclusters Uniformly Enveloped Electrochemically Activated Graphene for Highly Sensitive Hydrogen Peroxide Sensor

Palladium Nanoclusters Uniformly Enveloped Electrochemically Activated Graphene for Highly Sensitive Hydrogen Peroxide Sensor

Synthesis and characterization of nanocrystalline hydroxyapatite and its catalytic behavior towards synthesis of 3,4‐disubstituted isoxazole‐5(4H)‐ones in water

Immobilizing Pd nanoparticles on the ternary hybrid system of graphene oxide, Fe3O4 nanoparticles, and PAMAM dendrimer as an efficient support for catalyzing sonogashira coupling reaction

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Immobilizing Pd nanoparticles on the ternary hybrid system of graphene oxide, Fe₃O₄ nanoparticles, and PAMAM dendrimer as an efficient support for catalyzing sonogashira coupling reaction