Multiple signal-amplification via Ag and TiO2 decorated 3D nitrogen doped graphene hydrogel for fabricating sensitive label-free photoelectrochemical thrombin aptasensor

Hao, Nan; Hua, Rong; Chen, Saibo; Zhang, Ying; Zhou, Zhou; Qian, Jing; Liu, Qian; Wang, Kun

doi:10.1016/j.bios.2017.10.014

Cited by 116 publications

(37 citation statements)

References 45 publications

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“…TiO 2 photoelectrodes have several advantages, such as having a high stability, a low cost, and being environmental-friendly. Therefore, TiO 2 has been widely used in various PEC applications, including PEC water splitting [53][54][55][56][57][58], PEC fuel cells [59], PEC dye degradation [60][61][62] and PEC sensing [63][64][65][66]. Cowan et al reported the charge carrier dynamics within a TiO 2 photoanode under PEC operating conditions [38].…”

Section: Tio 2 Photoanodesmentioning

confidence: 99%

In situ charge carrier dynamics of semiconductor nanostructures for advanced photoelectrochemical and photocatalytic applications

2020

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Using in situ ultrafast laser spectroscopic techniques to monitor the charge dynamics of semiconductor photocatalysts under operating conditions is essential for digging out the veritable interactions between charge carriers and the reactive species. This real-time observation is desirable for optimizing individual components and their integration in advanced photoelectrochemical (PEC) and photocatalytic systems, which can achieve the “Holy Grail” of solar energy harvesting and solar fuel generation. This Review summarizes the recent developments of employing transient absorption spectroscopy for in situ measurements of charge dynamics on semiconductor nanostructures. The implications in the PEC and photocatalytic reactions toward hydrogen production and carbon dioxide reduction will be discussed, along with future outlooks and perspectives.

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Section: Tio 2 Photoanodesmentioning

confidence: 99%

In situ charge carrier dynamics of semiconductor nanostructures for advanced photoelectrochemical and photocatalytic applications

2020

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“…Owing to its practicality, simplicity, and low cost, colorimetric biosensing has drawn increasing concerns . Conversion of target analytes into color changes emerges as a key challenge for colorimetric biosensing . Colorimetric biosensing does not need complicated and costly apparatus, and can be used in point‐of‐care diagnosis and on‐site analysis since the color changes can be read by the unaided eye .…”

Section: Introductionmentioning

confidence: 99%

Peroxidase‐Like Activity of Smart Nanomaterials and Their Advanced Application in Colorimetric Glucose Biosensors

Liu

Huang

Qin

et al. 2019

Small

167

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Diabetes is a dominating health issue with 425 million people suffering from the disease worldwide and 4 million deaths each year. To avoid further complications, the diabetic patient blood glucose level should be strictly monitored despite there being no cure for diabetes. Colorimetric biosensing has attracted significant attention because of its low cost, simplicity, and practicality. Recently, some nanomaterials have been found that possess unexpected peroxidase‐like activity, and great advances have been made in fabricating colorimetric glucose biosensors based on the peroxidase‐like activity of these nanomaterials using glucose oxidase. Compared with natural horseradish peroxidase, the nanomaterials exhibit flexibility in structure design and composition, and have easy separation and storage, high stability, simple preparation, and tunable catalytic activity. To highlight the significant progress in the field of nanomaterial‐based peroxidase‐like activity, this work discusses the various smart nanomaterials that mimic horseradish peroxidase and its mechanism and development history, and the applications in colorimetric glucose biosensors. Different approaches for tunable peroxidase‐like activity of nanomaterials are summarized, such as size, morphology, and shape; surface modification and coating; and metal doping and alloy. Finally, the conclusion and challenges facing peroxidase‐like activity of nanomaterials and future directions are discussed.

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“…Graphene hydrogel (GH) is a 3D graphene material that can be prepared easily by hydrothermal reduction [30][31][32] and chemical reduction [33,34]. To date, GH has been used in supercapacitors [30,34,35] and electrochemical sensors [36][37][38][39]. GH-based nanocomposites show excellent electrocatalytic activity to the oxidation of ascorbic acid (AA), dopamine (DA), and uric acid (UA), which has been used in their simultaneous detection in human serum samples [31,32].…”

Section: Introductionmentioning

confidence: 99%

Electro-Oxidation and Simultaneous Determination of Indole-3-Acetic Acid and Salicylic Acid on Graphene Hydrogel Modified Electrode

Cao

Zhu

et al. 2019

Sensors

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A selective and sensitive electrochemical sensor was developed for simultaneous detection of phytohormones indole-3-acetic acid (IAA) and salicylic acid (SA). The sensing interface was fabricated on a porous, three-dimensional networked graphene hydrogel (GH) modified glassy carbon electrode (GCE). The electrocatalytic behavior of IAA and SA on the surface of the modified electrode (GH/GCE) was investigated by cyclic voltammetry and linear sweep voltammetry. Results show that the oxidation reactions of IAA and SA occur at different potentials, which enable their simultaneous detection at the sensing interface. Under optimal conditions, the GH/GCE exhibited good selectivity and stability and its response, unaffected by various interferents, was linear in the range of 4 to 200 µM of IAA and SA. The limit of detection (S/N = 3) achieved were 1.42 µM for IAA and 2.80 µM for SA. The sensor performance was validated by measuring for IAA and SA in real vegetable samples with satisfactory results.

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Multiple signal-amplification via Ag and TiO2 decorated 3D nitrogen doped graphene hydrogel for fabricating sensitive label-free photoelectrochemical thrombin aptasensor

Cited by 116 publications

References 45 publications

In situ charge carrier dynamics of semiconductor nanostructures for advanced photoelectrochemical and photocatalytic applications

In situ charge carrier dynamics of semiconductor nanostructures for advanced photoelectrochemical and photocatalytic applications

Peroxidase‐Like Activity of Smart Nanomaterials and Their Advanced Application in Colorimetric Glucose Biosensors

Electro-Oxidation and Simultaneous Determination of Indole-3-Acetic Acid and Salicylic Acid on Graphene Hydrogel Modified Electrode

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