Pyrolytic deposited graphite electrodes for voltammetric sensors: An alternative to nano structured electrodes

Riedel, J.; Berthold, M.; Guth, U.

doi:10.1016/j.sna.2016.01.046

Cited by 7 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sensitivity improves with the increase of peak current; in the CNTs-Au electrodes combined the action of nanometer gold and CNTs, the peak current further rises [Figure 8(d)] and the potential difference further narrows; this is mainly because that the gold nanoparticles have relatively low reaction activity and unique optical properties and have the function of selective oxidation, catalytic dehydrogenation and electrocatalytic (Li et al , 2015). Together with CNTs, the electrode surface area is increased effectively, the electron transfer rate is enhanced (Riedel et al , 2016). The results turn out that CNTs-Au electrodes have the highest peak current value, indicating that the collaborative use of CNTs and Au increase the sensor’s responsiveness.…”

Section: Resultsmentioning

confidence: 99%

Preparation and performance of CNTs-Pt formaldehyde sensor and CNTs-Au glucose sensor

Zhao

Zhou

et al. 2022

View full text Add to dashboard Cite

Purpose Since carbon nanotubes (CNTs) were discovered by Iijima in 1991, they have gained more and more attention by people because of their unique physical and chemical properties. The CNTs have one-dimensional nanostructure, high surface adsorption capacity, good conductivity and electronic ballistic transmission characteristics and therefore have excellent mechanical, electrical, physical and chemical properties. CNTs are ideal basic materials to make nanometer gas sensors. Nanometallic materials function as to enhance electrode activity and promote the electron transfer, so if composite nanometallic materials M (such as Au, Pt, Cu and Pd) and CNTs are used, all kinds of their characters of components would have coeffect. Electrochemical sensors by use of such composite as electrode would have a higher detection sensitivity. Design/methodology/approach CNTs were synthesized via chemical vapor deposition technique and were purified afterward. CNTs-M(Pt,Au) suspension was prepared by chemical deposition using spinning disc processor (SDP) and was coated on gold electrode. The modified electrodes were constructed, based on immobilization of glucose oxidase on an Au electrode by electrostatic effect. CNTs-Pt/ glassy carbon electrodes (GCE) electrodes were made by electrochemically deposition of platinum particles on GCE modified by CNTs. The microstructures of the harvested CNTs, CNTs-M (M = Au, Pt) were analyzed under scanning electron microscopy and transmission electron microscopy. The application of the sensor in medical detection has been evaluated. Findings The results shown that CNTs-Au biosensors exhibit good reproducibility, stability and fast response to glucose detection, it can be used in the clinic detection of glucose concentration in human serum. Using CNTs-Pt/GCE for formaldehyde detection exhibited high sensitivity and good reproducibility. Originality/value This study modified CNTs by using self-assembled techniques through SDP with nano Pt and Au by electrodeposition for the first time. CNTs-Pt/GCE electrode was prepared by depositing platinum particles electrochemically on GCE modified by CNTs. CNTs-Au-modified electrode was prepared by immobilization of glucose oxidase on an Au electrode first by electrostatic effect. Electrochemical behaviors of glucose at CNTs-Au and formaldehyde at CNTs-Pt/GCE were investigated by cyclic voltammetry.

show abstract

Section: Resultsmentioning

confidence: 99%

Preparation and performance of CNTs-Pt formaldehyde sensor and CNTs-Au glucose sensor

Zhao

Zhou

et al. 2022

View full text Add to dashboard Cite

show abstract

“…However, a deposit assigned to polymerization fouls the electrode surface [61]. Functionnalization of this surface is thus necessary, either by a pure chemical way using for instance LDH/cobalt-phtalocyanine ultrathin films [42] or pyrolytic deposited graphite [62], or by an enzymatic one. In this last case, tyrosinase is one of the most used enzymes.…”

Section: Discussionmentioning

confidence: 99%

Efficient Immobilization of Tyrosinase Enzyme on Layered Double Hydroxide Hybrid Nanomaterials for Electrochemical Detection of Polyphenols

et al. 2017

View full text Add to dashboard Cite

Abstract-Gold screen-printed electrodes coated with thin films of layered double hydroxides containing cobalt and aluminium (Co 1.57 Al(OH) x SO 4 , shortened as CoAl) have been investigated for the design of an electrochemical tyrosinasebased biosensor used for the detection of a complex mixture of polyphenols extracted from green tea. Physicochemical analyses show that the resulted biosensor exhibits very attractive characteristics: a high sensitivity, a large dynamic range (up to 1000 ng.mL −1 ), and very low limits of detection (0.33 pg.mL −1 and 0.03 pg.mL −1 for oxidation and reduction, respectively).Index Terms-Atomic force microscopy, electrochemical biosensor, layered double hydroxide, polyphenols, tyrosinase.

show abstract

“…Regarding its composition, it is known that sludge is rich in graphite. Recent studies have shown great potential of usage of materials or waste containing graphite [13][14][15][16][17] and that shall be approached in this article. It is worth highlighting that literature on the treatment of effluents of forging operations is still scarce.…”

Section: Introductionmentioning

confidence: 99%

Treatment of a forging industry graphite-rich wastewater and sludge characterization

Reckziegel¹,

Thiesen²,

Osório³

et al. 2018

Desalination and Water Treatment

View full text Add to dashboard Cite

Forging is a manufacturing process involving the shaping of metal using localized compressive forces. It is necessary to apply a lubricant, in many cases composed by graphite, and the process generate a wastewater that requires a proper treatment. The objective of this study was to evaluate the efficiency of the treatment of such effluent and characterize the sludge generated at a forging industry that recently changed in industrial process the oil-based lubricant by water-based lubricants. Initially, wastewater was treated by coagulation/flocculation with poly-aluminum chloride and a cationic flocculant. The treatment substantially reduced the pollutants load, exceeding in 90% the efficiency for most parameters assessed. The sludge generated in the wastewater treatment plant was characterized in terms of its microstructure, particle size distribution, chemical and mineralogical composition, and immediate analysis in terms of a solid energetic material. The sludge is composed mainly by graphite particles and, after dehydration, resulted in a material with possibilities for safe discharge, recycling or reuse. Considering the amount of sludge generated and the regional context, one possibility for destination is as energetic material for electric power generation.

show abstract

Pyrolytic deposited graphite electrodes for voltammetric sensors: An alternative to nano structured electrodes

Cited by 7 publications

References 14 publications

Preparation and performance of CNTs-Pt formaldehyde sensor and CNTs-Au glucose sensor

Preparation and performance of CNTs-Pt formaldehyde sensor and CNTs-Au glucose sensor

Efficient Immobilization of Tyrosinase Enzyme on Layered Double Hydroxide Hybrid Nanomaterials for Electrochemical Detection of Polyphenols

Treatment of a forging industry graphite-rich wastewater and sludge characterization

Contact Info

Product

Resources

About