High loading MnO 2 nanowires on graphene paper: Facile electrochemical synthesis and use as flexible electrode for tracking hydrogen peroxide secretion in live cells

Dong, Shuang; Xi, Jiangbo; Wu, Yanan; Liu, Hongfang; Fu, Chaoyang; Liu, Hongfang; Xiao, Fei

doi:10.1016/j.aca.2014.08.004

Cited by 151 publications

(59 citation statements)

References 45 publications

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“…The sensitive CDs/MWCNTs-10 probe was applied to perform real-time tracking of H 2 O 2 secretion by live cells, which plays an important role in host defense against various microbes as well as tumors [47]. Before the detection, the HeLa cells were grown at 37°C in 5 % CO 2 in 100 cm 2 flasks.…”

Section: Detection Of H 2 O 2 In Biological Samplementioning

confidence: 99%

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

2016

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A novel enzyme-free hydrogen peroxide sensor composed of carbon dots (CDs) and multi-walled carbon nanotubes (MWCNTs) was prepared. It was found that the carbon dots-decorated multi-walled carbon nanotubes nanocomposites (CDs/MWCNTs) modified glassy carbon (GC) electrode (CDs/MWCNTs/GCE) exhibited a significant synergistic electrocatalytic activity towards hydrogen peroxide reduction as compared to carbon dots or multi-walled carbon nanotubes alone, and the CDs/MWCNTs/GCE has shown a low detection limit as well as excellent stability, selectivity, and reproducibility. These remarkable analytical advantages enable the practical application of CDs/MWCNTs/GCE for the real-time tracking of hydrogen peroxide (H2O2) released from human cervical cancer cells with satisfactory results. The enhanced electrochemical activity can be assigned to the edge plane-like defective sites and lattice oxygen in the CDs/MWCNTs nanocomposites due to the small amount of decoration of carbon dots on the multi-walled carbon nanotubes. Based on a facile preparation method and with good electrochemical properties, the CDs/MWCNTs nanocomposites represent a new class of carbon electrode for electrochemical sensor applications. Graphical Abstract CDs/MWCNTs exhibited good electrocatalytic activity and stability to H2O2 reduction and can be used for real-time detection of H2O2 released from living cells.

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Section: Detection Of H 2 O 2 In Biological Samplementioning

confidence: 99%

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

2016

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“…Among the transition metal oxide based nanomaterials, manganese oxide is a low cost, versatile material and finds applications in various fields such as supercapacitor [19], Li ion batteries and electrochemical biosensors [20,21]. However, to enhance its electrochemical properties, it is often combined with noble metals [22], carbonaceous materials [23] such as graphene, graphene oxide, CNT [24,25,28] or conducting polymers [26,27]. To the best of our knowledge, this is the first report on Mn 2 O 3 -Au composite system for H 2 O 2 detection.…”

Section: Introductionmentioning

confidence: 99%

Selective Growth of Co-electrodeposited Mn2O3-Au Spherical Composite Network Towards Enhanced Non-enzymatic Hydrogen Peroxide Sensing

Saha

Jana

Majumder

et al. 2015

Electrochimica Acta

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“…Thus, it is necessary to build enzyme‐free electrochemical sensors with high sensitivity, low cost, and high stability towards the external environment. Nowadays, many nanomaterials that possess large specific surface area and high catalytic activity, such as semiconducting metal oxides , carbon nanotubes , graphene , transitional metallic nanoparticles and so on, have been used to fabricate enzyme‐free electrochemical sensors . However, the sensitivity of these non‐enzyme electrochemical sensors remains undesirable due to the relatively high background noise.…”

Section: Introductionmentioning

confidence: 99%

A Non‐enzymatic Hydrogen Peroxide Photoelectrochemical Sensor Based on a BiVO₄ Electrode

Liu

Zhang

2016

Electroanalysis

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In this study, a non‐enzymatic hydrogen peroxide photoelectrochemical (PEC) sensor based on nanoporous BiVO4 film electrode is fabricated by electrodeposit of nanoporous BiOI film on fluorine‐doped tin oxide glass (FTO) and subsequent conversion to BiVO4 by annealing at elevated temperature. The electrode exhibits excellent visible light photoelectrochemical activity, and H2O2 works as a hole scavenger to react with light‐induced electron holes on the valence band of BiVO4. Upon illumination and at applied bias potential of +0.2 V, the photocurrent density is linearly correlated to the concentration of H2O2. The linear determination range of H2O2 is 9.54–764.76 μM with a corresponding correlation coefficient of 0.9997, a detection limit of 1.59 μM (S/N=3), and sensitivity of 182.6 μA mM−1 cm−2. The optimum bias potential, most suitable film thickness, anti‐interference performance, and impedance are also explored. The sensor shows good response towards H2O2 and displays a promising prospect for non‐enzyme PEC H2O2 sensor.

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High loading MnO 2 nanowires on graphene paper: Facile electrochemical synthesis and use as flexible electrode for tracking hydrogen peroxide secretion in live cells

Cited by 151 publications

References 45 publications

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

Selective Growth of Co-electrodeposited Mn2O3-Au Spherical Composite Network Towards Enhanced Non-enzymatic Hydrogen Peroxide Sensing

A Non‐enzymatic Hydrogen Peroxide Photoelectrochemical Sensor Based on a BiVO₄ Electrode

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High loading MnO 2 nanowires on graphene paper: Facile electrochemical synthesis and use as flexible electrode for tracking hydrogen peroxide secretion in live cells

Cited by 151 publications

References 45 publications

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

Selective Growth of Co-electrodeposited Mn2O3-Au Spherical Composite Network Towards Enhanced Non-enzymatic Hydrogen Peroxide Sensing

A Non‐enzymatic Hydrogen Peroxide Photoelectrochemical Sensor Based on a BiVO4 Electrode

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A Non‐enzymatic Hydrogen Peroxide Photoelectrochemical Sensor Based on a BiVO₄ Electrode