Magnetic Fe3O4-Reduced Graphene Oxide Nanocomposites-Based Electrochemical Biosensing

Yu, Lili; Wu, Hui; Wu, Beina; Wang, Ziyi; Cao, Hongmei; Fu, Congying; Jia, Nengqin

doi:10.5101/nml140028a

Cited by 7 publications

(9 citation statements)

References 24 publications

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“…Elektroda kerja grafit sebagai elektroda sampel yang di uji, dipreparasi dengan menggunakan nanokomposit Fe3O4@C hasil sintesis, dengan cara melapiskan pada permukaan elektroda kerja. Kemudian, dilakukan pengikatan dengan biomolekul yaitu enzim Glukosa Oksidase (GOD) sebagai material aktif dari elektroda biosensor [39] Terdapat tiga elektroda yang digunakan dalam sistem, pertama adalah platina (pt) yang digunakan sebagai elektroda pembantu atau counter elektrode, kedua Ag/AgCl yang digunakan sebagai elektroda referensi atau Auxilery elektrode, dan ketiga Elektroda kerja yang merupakan elektroda yang digunakan sebagai elektroda yang terukur dari sampel. Elektroda kerja/elektroda sampel yang digunakan adalah elektroda grafit dari baterai A3.…”

Section: Metodologiunclassified

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Potensi Nanokomposit Fe3O4@C dari Bijih Besi Sebagai Pendeteksi Kadar Glukosa

Husain¹,

Suryajaya²,

Haryanti³

et al. 2019

Positron

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AbstrakSintesis nanokomposit Fe3O4@C dari bijih besi Tanah Laut dan sumber karbon dari gula pasir telah dilakukan dengan menggunakan metode kopresipitasi dan metode hidrotermal. Penelitian dilakukan untuk mengetahui karakteristik Fe3O4@C berbahan bijih besi. Sebanyak 6 g bijih besi digunakan sebagai bahan baku pembuatan Fe3O4. FeSO4.7H2O digunakan sebagai sumber ion Fe 2+ . Sampel diaduk dengan menggunakan temperatur 70 o C dengan kecepatan adukan 450 rpm. Karbon (C) disintesis menggunakan metode hidrotermal pada temperatur 300 o C dengan menambahkan etilon glikol sebagai surfaktan. Sampel Fe3O4 dan C digabung pada suhu 250 o C selama 30 menit dengan kecepatan 500 rpm. Sampel Nanokomposit Fe3O4@C dikarakterisasi menggunakan Vibrating Sample Magnetometer, Fourier Transform Infrared, Transmission Electron Microscopy, serta elektrokimia. Dari penelitian, diperoleh nilai magnetisasi saturasi sebesar 24,82 emu/g, jenis ikatan yang terdapat dalam nanokomposit Fe3O4@C adalah ikatan Fe-O, C=O, C=N dan O-H, distribusi ukuran partikel dalam rentang 5 nm -20 nm, dengan ratarata ukuran partikel 12 nm, serta nilai sensitivitas 0,285 mA/ppm. Kata kunci: bijih besi, karbon, nanokomposit Fe3O4@C

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Section: Metodologiunclassified

“…Tujuan pengukuran adalah untuk melihat sensitifitas dari elektroda kerja terhadap variasi larutan glukosa 0,2 -0,8 ppm. Elektroda Pt dan Ag/AgCl digunakan sebagai elektroda pembantu dan pembanding [39]. Secara ringkas, alur penelitian yang dilakukan ditunjukkan pada Gambar 1.…”

Section: Metodologiunclassified

Potensi Nanokomposit Fe3O4@C dari Bijih Besi Sebagai Pendeteksi Kadar Glukosa

Husain¹,

Suryajaya²,

Haryanti³

et al. 2019

Positron

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“…Glucose is a simple sugar that has the molecular formula C 6 H 12 O 6 and has a vital role in the body. Evaluation of glucose can be useful as a diagnostic test for diabetes mellitus, which is a global health problem with devastating social and economic impact [ 124 ] and also for cancer treatment because overexpressed biomarkers on the tumor cells facilitate rates of glucose catabolism and resulting in tumor cell proliferation [ 125 , 126 , 127 ]. Additionally, determination of glucose level is very important in industrial foods.…”

Section: Applicationmentioning

confidence: 99%

Iron-Based Nanomaterials/Graphene Composites for Advanced Electrochemical Sensors

et al. 2017

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Iron oxide nanostructures (IONs) in combination with graphene or its derivatives—e.g., graphene oxide and reduced graphene oxide—hold great promise toward engineering of efficient nanocomposites for enhancing the performance of advanced devices in many applicative fields. Due to the peculiar electrical and electrocatalytic properties displayed by composite structures in nanoscale dimensions, increasing efforts have been directed in recent years toward tailoring the properties of IONs-graphene based nanocomposites for developing more efficient electrochemical sensors. In the present feature paper, we first reviewed the various routes for synthesizing IONs-graphene nanostructures, highlighting advantages, disadvantages and the key synthesis parameters for each method. Then, a comprehensive discussion is presented in the case of application of IONs-graphene based composites in electrochemical sensors for the determination of various kinds of (bio)chemical substances.

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“…For its good electrochemical performance, it is useful in energy storage applications [22] such as in lithium-ion batteries [23]. Fe3O4/rGO nanocomposites can be used as photocatalytic material [24,25], for reducing heavy metals such as Cu +2 , Zn +2 , Ni +2 ions [26], Cr -2 [27][28][29][30], Pb 2+ [27,30], detecting Cd +2 [31] ions, degradation of phenol, as an antibacterial [25], for biosensing [31], and as an absorbent for removing dyes in aqueous solutions [32][33][34]. It has the potential to be used in a sensor to detect the presence of arsenic in mineral water [35,36], and wastewater treatment [37].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fe3O4/rGO Composites from Natural Sources: Application for Dyes Color Degradation in Aqueous Solution

Munasir

Kusumawati

et al. 2020

IJE

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A B S T R A C TThe magnetite (Fe3O4) nanoparticle and graphene oxide (GO) have become interesting materials due to their advanced applications. In this work, we investigated the fabrication of Fe3O4 nanoparticles (NPs) from iron sands and reduced graphene oxide (rGO) NPs from natural graphite. The core-shell fabrication of the Fe3O4/rGO was conducted by means of ex-situ method using ethanol as the medium. The crystal structure of Fe3O4/rGO was observed using X-ray diffraction (XRD) and functional groups were examined using Fourier transform infra-red (FTIR) spectroscopy. The characteristic of the disturbance originated by carbon atoms was investigated by Raman spectroscopy. The morphological, particle sizes and formation studied with transmission electron microscopy (TEM). The magnetic properties were analyzed using vibrating sample magnetometer (VSM). Furthermore, analysis of the adsorption performance, namely: dye-removal efficiency (DRE) and degradation rate (DR), as candidate materials absorbent were performed by means of UV-Vis spectroscopy. The data analysis of structure and phase of Fe3O4/rGO presented cubic spinel structure with crystallite size of 26-38 nm. The functional group analysis presented the existence of C-OH, C=O, C-O, and Fe-O. The micrograph analysis from the TEM image showed the particle size of the sample was in the range of 10 -30 nm. Along with the thickening shell, the saturation magnetization of Fe3O4/rGO decreased from 22.60 to 18.48 emu/g and decreased from 29.21 to 10.45 emu/g for Fe3O4. Finally, the rGO composition affects the shell wall, which encloses Fe3O4 as the core. Interestingly, an increase in absorption characteristic of natural dyes Fe3O4/rGO enhanced by the decrease of the shell thickness.

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Magnetic Fe3O4-Reduced Graphene Oxide Nanocomposites-Based Electrochemical Biosensing

Cited by 7 publications

References 24 publications

Potensi Nanokomposit Fe3O4@C dari Bijih Besi Sebagai Pendeteksi Kadar Glukosa

Potensi Nanokomposit Fe3O4@C dari Bijih Besi Sebagai Pendeteksi Kadar Glukosa

Iron-Based Nanomaterials/Graphene Composites for Advanced Electrochemical Sensors

Characterization of Fe3O4/rGO Composites from Natural Sources: Application for Dyes Color Degradation in Aqueous Solution

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