Fto Modified Electrodes by Direct Gold Electrodeposition: Production, Characterization and Electrochemical Sensor Aplication

Oliveira, Rogério de; Pissetti, Fábio L.; Lucho, Alzira Maria Serpa

doi:10.5935/0100-4042.20160011

Cited by 3 publications

(3 citation statements)

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“…Another feature is the low power consumption and small dimensions, making the CCS811 suitable for in situ measurements proposed in this study. First, however, it is necessary to perform compensation of the temperature effect on the CO2 sensor measurements (KOROTCENKOV, 2014;OLIVEIRA et al, 2016;LOWINSOHN et al, 2006). DHT21 has a digital architecture and has a thermistor for temperature measurement with an accuracy of ± 0.5° C. Internally, the thermistors have a ceramic that changes the resistance to the passage of electric current according to the temperature of the environment.…”

Section: Development Hardwarementioning

confidence: 99%

IoT sensory platform for monitoring temperature, relative humidity of the air and CO2 in situ

Rodrigues

Silva

Pantoja

et al. 2022

RICA

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This article addresses the development of a sensory platform capable of measuring temperature, relative humidity, and carbon dioxide. The system is based on concepts of an IoT (Internet of Things) platform using the ESP8266 microcontroller connected to DHT21 and CSS811 sensors, the power system has lithium batteries. An App (Application) in Blynk technology was used to display the collected information and georeferenced the data, which in turn are stored in a digital cloud. Two experiments were carried out to determine the environmental quality in a forest and urban area within Belém, showing the quality of the developed system and the influence that trees have on air quality in relation to carbon dioxide and thermal comfort. Furthermore, a reformulation of the urban public transportation system must be employed, enabling it to be used in an efficient and less polluting way, since transportation is the leading emitter of pollutants that contribute to the greenhouse effect and aggravates factors related to public health. The description of the developed device allows its reproducibility and has as main differentials: optimized power system, possibility of integration with renewable energies, low cost platform; connection with several sensors; easy programming and operation; internet access and, last but not least, low cost.

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Section: Development Hardwarementioning

confidence: 99%

IoT sensory platform for monitoring temperature, relative humidity of the air and CO2 in situ

Rodrigues

Silva

Pantoja

et al. 2022

RICA

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“…However, when submitted to the cyclic voltammetry technique in the absence and presence of the analyte (EG) in alkaline media, the Ni(OH) 2 /AuNp/ rGO/GCE presented a voltammogram with three anodic peaks and three cathodic peaks (Figure 4d). The first and second anodic peaks (1 and 2) observed at -0.07 V and 0.21V, respectively, refer to the adsorption of OHon the gold surface, the peaks 4 and 5 at 0.48 and 0.36 V, respectively, are related to α-Ni(OH) 2 /γ-NiOOH redox pair [67][68][69][70][71] . The peak 3 is related to the EG oxidation and responds to EG concentration.…”

Section: Electrochemical Behavior Of the Electrodes In The Absence And Presence Of Egmentioning

confidence: 99%

Electrochemical Sensor for Ethylene Glycol using Reduced Graphene Oxide/AuNp/Ni(OH)2 Modified Glassy Carbon Electrode

et al. 2021

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An electrochemical sensor based on a modified glassy carbon electrode (GCE) with reduced graphene oxide and Ni-Au nanoparticles (Ni(OH) 2 /AuNp/rGO/GCE) was developed for the determination of ethylene glycol. The graphene oxide was reduced electrochemically at the electrode surface by chronoamperometry, the gold nanoparticles were deposited by chronopotentiometry while the nickel hydroxide nanoparticles were deposited by cyclic voltammetry. The characterization of graphene oxide was performed by Raman spectroscopy, X-ray diffraction (XRD) and transmission-mode scanning electron microscopy (TSEM), while the modified electrodes were characterized by scanning electron microscopy (SEM) and electron dispersive spectroscopy (EDS) analysis. The determination of ethylene glycol was performed by cyclic voltammetry due to the regeneration of the active sites, preventing loss of the sensor signal. The modified GCE with rGO and Ni(OH) 2 /AuNp showed a good performance obtaining a linear range of 0.24 to 1.4 mmol L -1 with a correlation coefficient of 0.9903, limits of detection and quantification (49 and 162 µmol L -1 , respectively) and high stability with 500 continuous analysis cycles.

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“…1 Ele e outros compostos relacionados podem ser determinados e caracterizados por diversos métodos de análises. [7][8][9][10][11][12][13][14]…”

Section: Aspectos Geraisunclassified

Avanços Químicos No Planejamento E Desenvolvimento De Derivados Do Paracetamol

et al. 2018

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CHEMICAL ADVANCES ON DESIGN AND DEVELOPMENT OF PARACETAMOL DERIVATIVES. Acetaminophen or paracetamol is a widely used analgesic and antipyretic drug and appears to be safe if used at normal therapeutic doses, but in large doses produce liver and / or kidney damage in humans and experimental animals. Prostaglandin endoperoxide synthase (PGES) and cytochrome P-450 are the key enzymes in humans as they are responsible for the analgesic and toxicity effects of paracetamol, respectively. At present, the development of new derivatives still has few impacts on clinical applications of safe compounds. Thus, in this work are discussed, a series of approaches on the design and development of acetaminophen derivatives. Some efforts were realized in our own research group.

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Fto Modified Electrodes by Direct Gold Electrodeposition: Production, Characterization and Electrochemical Sensor Aplication

Cited by 3 publications

References 0 publications

IoT sensory platform for monitoring temperature, relative humidity of the air and CO2 in situ

IoT sensory platform for monitoring temperature, relative humidity of the air and CO2 in situ

Electrochemical Sensor for Ethylene Glycol using Reduced Graphene Oxide/AuNp/Ni(OH)2 Modified Glassy Carbon Electrode

Avanços Químicos No Planejamento E Desenvolvimento De Derivados Do Paracetamol

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