Mesoporous gold nanoparticles supported cobalt nanorods as a free-standing electrochemical sensor for sensitive hydrogen peroxide detection

Bạch, Long Giang; Thi, M.L.N.; Sơn, Nguyen Tăng; Bui, Quoc-Bao; Nhac-Vu, H.-T.; Ai-Le, P.H.

doi:10.1016/j.jelechem.2019.113359

Cited by 19 publications

(10 citation statements)

References 49 publications

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“…The stabilized AuNPs have exciting surface plasmonic properties and found applications in various research fields such as sensors [23], drug delivery [24], biomedical imaging [25], cancer treatment [26] and in diagnosis and therapy of several other diseases [27]. AuNPs have been employed for the colorimetric detection of biological and chemical compounds due to their large surface area and specific distance-dependent optical properties [12,22,[28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Colorimetric sensing of cephradine through polypropylene glycol functionalized gold nanoparticles

et al. 2021

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The development of metal nanoparticle-based facile colorimetric assays for drugs and insecticides is an emerging area of current scientific research. In the present work, polypropylene glycol was used for stabilization of gold nanoparticles (AuNPs) in a simple one-pot two-phase process and subsequently employed it for the specific detection of cephradine (CPH). The characterization of the prepared PPG-AuNPs was conducted through various analytical techniques such as UV-visible spectrophotometry, Fourier transform infrared spectroscopy, atomic force microscopy (AFM), zeta potential and zetasizer techniques. As the major target of the study, the stabilized PPG-AuNPs were employed for colorimetric detection of CPH and other drugs. Typical wine-red colour of PPG-AuNPs disappeared immediately and surface plasmon resonance band quenched by addition of CPH in the presence of several other interferents (drugs and salts) and in real samples. PPG-AuNPs permitted efficient, selective, reliable and rapid determination in a concentration range of 0.01–120 mM with a detection limit (LoD) of 11.0 mM. The developed sensor has the potential to be used for fast scanning of pharmaceutical formulations for quantification of CPH at production facilities.

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Section: Introductionmentioning

confidence: 99%

Colorimetric sensing of cephradine through polypropylene glycol functionalized gold nanoparticles

et al. 2021

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“…Additionally, graphene sheets can be used as excellent host materials for growing nanomaterials . Inorganic graphene analogues, such as modified or (Pt, Au, and Pd) nanoparticle (NP)-integrated graphene sheets help in achieving high carrier mobility and enhancement in the active surface area. − Among the metal NPs, platinum (Pt) NPs have been paid special attention because of their morphology-dependent electrocatalytic activities, optical properties, fast electron transfer in the electrode surface, and biocompatibility. Most importantly, the shape and size of the Pt NPs can be easily controlled during the synthesis.…”

Section: Introductionmentioning

confidence: 99%

Facile Green Approach for Developing Electrochemically Reduced Graphene Oxide-Embedded Platinum Nanoparticles for Ultrasensitive Detection of Nitric Oxide

et al. 2021

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Nitric oxide (NO) plays a crucial and important role in cellular physiology and also acts as a signaling molecule for cancer in humans. However, conventional detection methods have their own limitations in the detection of NO at low concentrations because of its high reactivity and low lifetime. Herein, we report a strategy to fabricate Pt nanoparticle-decorated electrochemically reduced graphene oxide (erGO)-modified glassy carbon electrode (GCE) with efficiency to detect NO at a low concentration. For this study, Pt@erGO/GCE was fabricated by employing two different sequential methods [first GO reduction followed by Pt electrodeposition (SQ-I) and Pt electrodeposition followed by GO reduction (SQ-II)]. It was interesting to note that the electrocatalytic current response for SQ-I (184 μA) was ∼15 and ∼3 folds higher than those of the bare GCE (11.7 μA) and SQ-II (61.5 μA). The higher current response was mainly attributed to a higher diffusion coefficient and electrochemically active surface area. The proposed SQ-I electrode exhibited a considerably low LOD of 52 nM (S/N = 3) in a linear range of 0.25–40 μM with a short response time (0.7 s). In addition, the practical analytical applicability of the proposed sensor was also verified.

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“…AA, as an essential nutrient for animals and plants, plays an key role in organisms, promoting the production of antibodies and collagen, and maintaining immune function. It is also an antioxidant widely used in the food field. − H 2 O 2 is also closely related to organisms, and when the content exceeds the standard, the DNA chain will be damaged, resulting in genetic diseases. − Therefore, it is necessary to accurately and rapidly determine the contents of AA and H 2 O 2 in biology. So AA and H 2 O 2 were chosen to further explore the electric catalytic oxidation–reduction ability of the electrode.…”

Section: Resultsmentioning

confidence: 99%

Supramolecular Host–Guest Assembly Based on Phosphotungstate Nanostructures for Pseudocapacitive and Electrochemical Sensing Applications

Yang

Cui

et al. 2022

ACS Appl. Nano Mater.

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Flexible ligands and multinuclear complexes were assembled into nanoscale {P2W18O62} polyoxometalates (POMs) to generate two phosphotungstate hybrid derivatives, (H2bip)2{H2P2 W18O62}·2H2O (1) and (bipy)0.5{Ag(bipy)2}{Ag4(bipy)7}{NaP2W18O62}·H2O (2) (bip = 1,5-bis(imidazole-1-yl)pentane; bipy = 2,2′-bipy), via a precursor hydrothermal method. Compound 1 is a bip ligand modified 4,8-connected supramolecular net with {415;612;8}{45;6}2 topology. In compound 2, the monocore complexes {Ag(bipy)2} and tetranuclear complexes {Ag4(bipy)7} self-associate to generate two supramolecular chains A and B, respectively, which are further alternately joined together to form a unique metal–organic framework with irregular cavities via weak actions and π–π stacking. The Na-linked {P2W18O62} dipolymers as guest units were embedded into the holes, leading to a 3D supramolecular host–guest assemblies. The capacitive performance test reveals that 2-GCE/-CPE presents improved specific capacitance (802.4 and 752.1 F/g at 3 A/g), cycle efficiency (93.6 and 94.8% after the 5000th cycle), and electrical conductivity compared to the precursor and bip ligand modified compound 1. The electrocatalytic comparative data shows that 2-GCE has enhanced electrochemical redox capacity compared to the precursor and compound 1. Further sensing tests display that 2-GCE shows strong electrochemical responses to H2O2/AA at voltages of −0.41/0.36 V with a lower detection line of 0.33/0.05 μM, a wider linear range of 1.0 μM to 3.18 mM/0.15 μM to 2.33 mM, merit selectivity, and reproducibility. The excellent capacitive and sensing performances are related to increased redox centers, improved ion/electron conversion efficiency, and host–guest structural stability resulting from the introduction of multinuclear complexes, irregular holes, and abundant π–π stacking. This study not only enriches the variety of Dawson-type POMs but also provides a feasible idea for enhancing their electrochemical capacitance and sensing performance.

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Mesoporous gold nanoparticles supported cobalt nanorods as a free-standing electrochemical sensor for sensitive hydrogen peroxide detection

Cited by 19 publications

References 49 publications

Colorimetric sensing of cephradine through polypropylene glycol functionalized gold nanoparticles

Colorimetric sensing of cephradine through polypropylene glycol functionalized gold nanoparticles

Facile Green Approach for Developing Electrochemically Reduced Graphene Oxide-Embedded Platinum Nanoparticles for Ultrasensitive Detection of Nitric Oxide

Supramolecular Host–Guest Assembly Based on Phosphotungstate Nanostructures for Pseudocapacitive and Electrochemical Sensing Applications

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