Strategy to control the amount of titania dispersed on SBA-15 surface preserving its porosity, aiming to develop a sensor for electrochemical evaluation of antibiotics

Souza, Luana Vohlbrecht de; Tkachenko, Oleg; Cardoso, Billy Nunes; Pizzolato, Tânia Mara; Dias, Susana Oliveira; Vasconcellos, M.A.Z.; Arenas, Leliz Ticona; Costa, Tânia Maria Haas; Moro, Celso Camilo; Benvenutti, Edílson V.

doi:10.1016/j.micromeso.2019.06.013

Cited by 14 publications

(2 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of these electrochemical methods were based on glassy carbon electrodes modified with signal amplification materials, such as carbon nanomaterials and their composites. However, these Chemosensors 2023, 11, 339 2 of 13 electrochemical sensors possessed low sensitivity or limited selectivity [11][12][13][14][15][16][17][18][19][20]. To improve the response selectivity of electrochemical sensors, molecularly imprinted materials are introduced as selective recognition elements to upgrade their performance.…”

Section: Introductionmentioning

confidence: 99%

An Electrochemical Sensor for Trimethoprim Based on a Magnetic Molecularly Imprinted Carbon Paste Electrode

Liu,

Zhang,

Zheng

et al. 2023

Chemosensors

View full text Add to dashboard Cite

In order to achieve simple, rapid, and highly sensitive detection of trimethoprim (TMP), a magnetic molecularly imprinted carbon paste electrode (MCPE) was prepared by drop-coating magnetic molecularly imprinted polymer (MIP@Fe3O4@MWNTs) on the surface of reduction graphene oxide (rGO)/MCPE doped with Fe3O4@MWNTs. The introduction of multi-walled carbon nanotubes (MWNTs) and rGO served as dual signal-amplification materials, which can improve the response sensitivity of the sensor. In addition, the magnetic interaction between the substrate electrode and the molecularly imprinted material was beneficial to increasing the stability of the sensor. As expected, the electrochemical sensor not only showed sensitivity and selectivity for the detection of TMP, but it also possessed good stability. The detection range for TMP was 4.0 × 10−9~5.0 × 10−4 mol/L, and the detection limit was 1.2 × 10−9 mol/L. The response performance varied within 10% when the sensor was placed for more than 2 months and used more than 60 times. The spiked recoveries of TMP in environmental water samples, urine samples, and pharmaceuticals (drugs) were between 91% and 110%, and the relative standard deviation (RSD) was within 5%.

show abstract

Section: Introductionmentioning

confidence: 99%

An Electrochemical Sensor for Trimethoprim Based on a Magnetic Molecularly Imprinted Carbon Paste Electrode

Liu,

Zhang,

Zheng

et al. 2023

Chemosensors

View full text Add to dashboard Cite

show abstract

“…Among the materials of various pore geometry—which may also be irregular—one can distinguish those with cylindrical pores. This inhomogeneous group includes carbon nanotubes [ 11 , 12 ], some ordered carbons [ 13 ] and mineral adsorbents, like MCM-41 [ 14 ], AlPO 4 -5 [ 15 ], SBA-15 [ 16 ], and alumina [ 17 ], as other nanoporous materials, also those ones with cylindrical pores, have various applications—see for example [ 12 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

The Finite Pore Volume GAB Adsorption Isotherm Model as a Simple Tool to Estimate a Diameter of Cylindrical Nanopores

et al. 2021

View full text Add to dashboard Cite

The finite pore volume Guggenheim–Anderson–de Boer (fpv-GAB) adsorption isotherm model has been considered as a simple tool which not only enables us to analyze the shape of isotherms theoretically, but also provides information about pore diameter. The proposed methodology is based on the geometrical considerations and the division of the adsorption space into two parts: the monolayer and the multilayer space. The ratio of the volumes of these two spaces is unambiguously related to the pore diameter. This ratio can be simply determined from the N2 adsorption isotherm by its fitting with the use of fpv-GAB model. The volume ratio is equal to the ratio of the adsorption capacities in the monolayer and the multilayer—two of the best-fit parameters. The suggested approach has been verified using a series of isotherms simulated inside ideal carbon nanotubes. The adsorption data for some real adsorbents has also been used during tests. The studies performed have proven that diameters estimated with the use of the proposed method are comparable with the geometrical sizes or diameters published by others and based on the application of more sophisticated methods. For pores wider than 3 nm, the relative error does not exceed a few percent. The approach based on the fpv-GAB model reflects well the differences in pore sizes for the series of materials. Therefore, it can be treated as a convenient tool to compare various samples.

show abstract

Silver nanoparticles in situ synthesized inside of the SBA-15 pores for carbon paste–modified electrode applied as a sensor for amoxicillin determination

Quandt,

da Rosa,

Didó

et al. 2023

J Solid State Electrochem

View full text Add to dashboard Cite

Strategy to control the amount of titania dispersed on SBA-15 surface preserving its porosity, aiming to develop a sensor for electrochemical evaluation of antibiotics

Cited by 14 publications

References 47 publications

An Electrochemical Sensor for Trimethoprim Based on a Magnetic Molecularly Imprinted Carbon Paste Electrode

An Electrochemical Sensor for Trimethoprim Based on a Magnetic Molecularly Imprinted Carbon Paste Electrode

The Finite Pore Volume GAB Adsorption Isotherm Model as a Simple Tool to Estimate a Diameter of Cylindrical Nanopores

Silver nanoparticles in situ synthesized inside of the SBA-15 pores for carbon paste–modified electrode applied as a sensor for amoxicillin determination

Contact Info

Product

Resources

About