scholarly journals Superwetting and aptamer functionalized shrink-induced high surface area electrochemical sensors

2017 ◽  
Vol 94 ◽  
pp. 438-442 ◽  
Author(s):  
A. Hauke ◽  
L.S. Selva Kumar ◽  
M.Y. Kim ◽  
J. Pegan ◽  
M. Khine ◽  
...  
Keyword(s):  
Surface Area ◽  
Electrochemical Sensors ◽  
High Surface ◽  
High Surface Area

Determination of PBP by Using a Nano SiO2/GC Modified Electrode

2011 ◽  
Vol 312-315 ◽  
pp. 138-142
Author(s):  
A. Shokuhi Rad
Keyword(s):  
Electrochemical Sensor ◽  
Surface Area ◽  
Modified Electrode ◽  
Electrochemical Sensors ◽  
High Surface ◽  
High Surface Area ◽  
Sio2 Film ◽  
Enhancement Effect ◽  
Nano Sio2

Recently, several metal oxide nanomaterials have been deposited on the surface of electrodes and investigated for the reduction/ oxidation and detection of some biological materials. Electrochemical Sensors with high surface area and porosity are important components in an irresistible wealth of systems for various applications. An electrochemical sensor for the sensitive determination of parabromophenol (PBP) was synthesized based on the nano-SiO2 film-modified electrode. Owing to the exceptional properties of nano-SiO2 such as successfully minimized transport limitations, huge surface area, strong adsorptive ability, subtle electronic properties and catalytic ability, the electrochemical oxidation signal of PBP significantly increases at the nano- SiO2/GC electrochemical sensor, suggesting that nano-SiO2 film exhibits obvious enhancement effect to the determination of PBP. Based on this, a sensitive electrochemical method was developed for the determination of PBP.

scholarly journals Electrochemical Biosensors Based on Nanostructured Carbon Black: A Review

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Tiago Almeida Silva ◽  
Fernando Cruz Moraes ◽  
Bruno Campos Janegitz ◽  
Orlando Fatibello-Filho
Keyword(s):  
Carbon Black ◽  
Surface Area ◽  
Electrochemical Sensors ◽  
Low Cost ◽  
High Surface ◽  
Enzymatic Catalysis ◽  
High Surface Area ◽  
Modified Electrodes ◽  
Nanostructured Material ◽  
Future Challenges

Carbon black (CB) is a nanostructured material widely used in several industrial processes. This nanomaterial features a set of remarkable properties including high surface area, high thermal and electrical conductivity, and very low cost. Several studies have explored the applicability of CB in electrochemical fields. Recent data showed that modified electrodes based on CB present fast charge transfer and high electroactive surface area, comparable to carbon nanotubes and graphene. These characteristics make CB a promising candidate for the design of electrochemical sensors and biosensors. In this review, we highlight recent advances in the use of CB as a template for biosensing. As will be seen, we discuss the main biosensing strategies adopted for enzymatic catalysis for several target analytes, such as glucose, hydrogen peroxide, and environmental contaminants. Recent applications of CB on DNA-based biosensors are also described. Finally, future challenges and trends of CB use in bioanalytical chemistry are discussed.

An Overview on Electrochemical Sensors based on Nanomaterials for Determination of Drugs of Abuse

2020 ◽  
Vol 17 ◽  
Author(s):  
Mandana Amiri ◽  
Hamideh Imanzadeh ◽  
Yasaman Sefid-Sefidehkhan
Keyword(s):  
Surface Area ◽  
Illicit Drugs ◽  
Electrochemical Sensors ◽  
Drugs Of Abuse ◽  
Low Cost ◽  
High Surface ◽  
Electrochemical Techniques ◽  
High Surface Area ◽  
Good Control ◽  
Nanocomposite Films

: Drug abuse considered a serious source of economic and social problems. The sensing of drugs of abuse is of demanding in forensic and clinical toxicology. There are many various methods for determination these materials using chromatographic and mass spectrometric techniques. Most of these techniques needs high-cost equipment, time consuming and suffer hard sample preparations. However, electrochemical methods are easy, simple and no need for complicated sample preparations cause to more interests of their use for determinations of toxics and pharmaceuticals. On the other hand, use of nanomaterials in electrochemistry found wide attentions to improve selectivity, sensitivity and limit of detections of various compounds such as pharmaceuticals, biologicals and environmental. Nanomaterials draw interests due to their low cost and unique size-dependent properties. The settling of nanomaterials into different matrices to prepare nanocomposite films founds wide interest. The unique properties of nanomaterials like mechanical, electrical, optical, catalytic and magnetic properties in addition of their significant high surface area per mass make them popular. Besides the novel properties, nanomaterials demonstrate new approaches to fabricate low cost electrodes by minimizing the materials needed and waste. The presence of nanotechnology beside modern electrochemical techniques helps to emerge of powerful, reliable electrical devices for sensing that shows benefits like increasing mass transport rate, high surface area and good control over electrode microenvironment. The aim of this review is to give an outline for the electrochemical determination based on nanomaterials of the commonly occurring illicit drugs in a various matrices such as urine, blood and saliva, which are important for determining of drugs of abuse.

Tenacious Mass Transfer Limitations Drive Catalytic Selectivity during Electrochemical Carbon Dioxide Reduction

2019 ◽  
Author(s):  
Kailun Yang ◽  
Recep Kas ◽  
Wilson A. Smith
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Catalyst Layer ◽  
Active Surface ◽  
Active Surface Area ◽  
High Concentration ◽  
Copper Electrodes ◽  
Surface Enhanced ◽  
Local Current

<p>This study evaluated the performance of the commonly used strong buffer electrolytes, i.e. phosphate buffers, during CO<sub>2</sub> electroreduction in neutral pH conditions by using in-situ surface enhanced infrared absorption spectroscopy (SEIRAS). Unfortunately, the buffers break down a lot faster than anticipated which has serious implications on many studies in the literature such as selectivity and kinetic analysis of the electrocatalysts. Increasing electrolyte concentration, surprisingly, did not extend the potential window of the phosphate buffers due to dramatic increase in hydrogen evolution reaction. Even high concentration phosphate buffers (1 M) break down within the potentials (-1 V vs RHE) where hydrocarbons are formed on copper electrodes. We have extended the discussion to high surface area electrodes by evaluating electrodes composed of copper nanowires. We would like highlight that it is not possible to cope with high local current densities on these high surface area electrodes by using high buffer capacity solutions and the CO<sub>2</sub> electrocatalysts are needed to be evaluated by casting thin nanoparticle films onto inert substrates as commonly employed in fuel cell reactions and up to now scarcely employed in CO<sub>2</sub> electroreduction. In addition, we underscore that normalization of the electrocatalytic activity to the electrochemical active surface area is not the ultimate solution due to concentration gradient along the catalyst layer.This will “underestimate” the activity of high surface electrocatalyst and the degree of underestimation will depend on the thickness, porosity and morphology of the catalyst layer. </p> <p> </p>

scholarly journals Rugae-like FeP nanocrystal assembly on a carbon cloth: an exceptionally efficient and stable cathode for hydrogen evolution

Nanoscale ◽  
2015 ◽  
Vol 7 (25) ◽  
pp. 10974-10981 ◽  
Author(s):  
Xiulin Yang ◽  
Ang-Yu Lu ◽  
Yihan Zhu ◽  
Shixiong Min ◽  
Mohamed Nejib Hedhili ◽  
...  
Keyword(s):  
Gas Phase ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Efficiency ◽  
Carbon Cloth ◽  
Nanocrystal Assembly

High surface area FeP nanosheets on a carbon cloth were prepared by gas phase phosphidation of electroplated FeOOH, which exhibit exceptionally high catalytic efficiency and stability for hydrogen generation.

High Surface Area NiCoP Nanostructure as Efficient Water Splitting Electrocatalyst for the Oxygen Evolution Reaction

2021 ◽  
pp. 111312
Author(s):  
Sisir Maity ◽  
Dheeraj Kumar Singh ◽  
Divya Bhutani ◽  
Suchitra Prasad ◽  
Umesh V. Waghmare ◽  
...  
Keyword(s):  
Surface Area ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Surface ◽  
High Surface Area

scholarly journals Fast synthesis of high surface area bio-based porous carbons for p-nitrophenol removal

MethodsX ◽  
2021 ◽  
pp. 101464
Author(s):  
Yichen Wu ◽  
Nan Zhang ◽  
Charles-François de Lannoy
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Porous Carbons ◽  
Fast Synthesis

Synthesis of high surface area and functionalized nanoporous biocarbons and their efficiency for CO2 capture and supercapacitors

2021 ◽  
Author(s):  
Gurwinder Singh ◽  
Rohan Bahadur ◽  
Ajanya Maria Ruban ◽  
Jefrin Marykala Davidraj ◽  
Dawei Su ◽  
...  
Keyword(s):  
Energy Storage ◽  
Surface Area ◽  
Co2 Capture ◽  
Water Purification ◽  
High Surface ◽  
High Surface Area ◽  
Energy Storage And Conversion ◽  
Waste Biomass ◽  
Fabrication Technology ◽  
Significant Attention

Nanoporous biocarbons derived from waste biomass have created significant attention owing to their great potential for energy storage and conversion and water purification. However, the fabrication technology for these materials...

scholarly journals Developing Eco-Friendly and Cost-Effective Porous Adsorbent for Carbon Dioxide Capture

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1962
Author(s):  
Mahboubeh Nabavinia ◽  
Baishali Kanjilal ◽  
Noahiro Fujinuma ◽  
Amos Mugweru ◽  
Iman Noshadi
Keyword(s):  
Carbon Dioxide ◽  
Surface Area ◽  
Co2 Capture ◽  
High Surface ◽  
Scale Up ◽  
Polymer Networks ◽  
High Surface Area ◽  
Excellent Thermal Stability ◽  
Doped Polymers ◽  
Metal Doped

To address the issue of global warming and climate change issues, recent research efforts have highlighted opportunities for capturing and electrochemically converting carbon dioxide (CO2). Despite metal doped polymers receiving widespread attention in this respect, the structures hitherto reported lack in ease of synthesis with scale up feasibility. In this study, a series of mesoporous metal-doped polymers (MRFs) with tunable metal functionality and hierarchical porosity were successfully synthesized using a one-step copolymerization of resorcinol and formaldehyde with Polyethyleneimine (PEI) under solvothermal conditions. The effect of PEI and metal doping concentrations were observed on physical properties and adsorption results. The results confirmed the role of PEI on the mesoporosity of the polymer networks and high surface area in addition to enhanced CO2 capture capacity. The resulting Cobalt doped material shows excellent thermal stability and promising CO2 capture performance, with equilibrium adsorption of 2.3 mmol CO2/g at 0 °C and 1 bar for at a surface area 675.62 m2/g. This mesoporous polymer, with its ease of synthesis is a promising candidate for promising for CO2 capture and possible subsequent electrochemical conversion.

Sign in / Sign up

Export Citation Format

Share Document