Mesoporous Silica Electrochemical Sensors for the Detection of Ascorbic Acid and Uric Acid

Hassan, H.; Rahman, Nurul Barakah Ab; Jalil, Mohammad Noor

doi:10.17576/mjas-2016-2002-18

Cited by 3 publications

(4 citation statements)

References 29 publications

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“…Two types of electrodes were prepared for cyclic voltammetry and electrochemical impedance properties as adapted from Hassan et al [10]. The carbon paste electrode (CPE) was prepared by mixing graphite powder with paraffin oil.…”

Section: Electrode Fabricationmentioning

confidence: 99%

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Electrochemical Properties of Mesoporous Silica (Sba-15)-Carbon Electrode

2019

MJAS

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Mesoporous silica is material that possesses the pore sizes between 2 nm to 50 nm which had expanded their applications rapidly. In this study, mesostructured SBA-15 was synthesized and characterized then the electrochemical behaviour being analysed to determine the current signal and the impedance of mesoporous silica carbon electrode. The material with pore sizes 5.5 nm was successfully synthesized by surfactant templating technique, using triblock copolymer pluronic (P123) as directing agent and tetraethyl orthosilicate (TEOS) as silica sources. The synthesized SBA-15 was characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), nitrogen adsorption-desorption and infra-red (IR). Two different electrodes were fabricated which carbon paste electrode (CPE) and hybrid SBA-15 with carbon paste electrode (SBA-15/MCPE) and analysed using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The SBA-15/MCPE results better adsorption and enhanced the response signal to 30% and lower resistance compared to CPE with 179Ω and 187Ω respectively due to addition of meso-sites which improved the electron pathway This study demonstrates that mesoporous silica (SBA-15) can be considered as promising material in development of high performance, lightweight and flexible devices in electrochemistry.

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Section: Electrode Fabricationmentioning

confidence: 99%

“…Previous research had proved that mesoporous silica carbon paste enhanced the current signal compare to carbon paste electrode [10,11,12]. The materials were made from silica which SBA-15 provide 2D pore structure.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Properties of Mesoporous Silica (Sba-15)-Carbon Electrode

2019

MJAS

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“…As a material having a regular pore structure with a diameter of 2-50 nm, it can minimize crystal formation, inhibit nanoparticle aggregation, stabilize the position, and improve the special surface of the material. Therefore, it can be used in various surface-related applications, such as catalysis [1][2][3], gas separation [4][5][6][7], drug delivery [8][9], energy storage [10][11], membranes [12][13], and sensors [14][15]. According to their pore size, mesoporous silicates can provide access to relatively large molecules and enhance diffusion.…”

Section: ■ Introductionmentioning

confidence: 99%

Optimizing Rice Husk Silica Mass and Sonication Time for a More Efficient and Environmentally Friendly Synthesis of SBA-15

Suyanta

Mudasir²

2022

Indones. J. Chem.

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By optimizing rice husk silica mass and sonication time, SBA-15 was successfully synthesized in a more efficient and environmentally friendly way. The solution of Pluronic P-123 was mixed with the solution containing NaOH and various masses of rice husk silica (4–12 g), followed by sonication for a certain time (30–150 min). The mixture was filtered and washed with distilled water and ethanol until neutral, then dried at 110 °C for 2 h and calcined at 500 °C for 6 h. The results showed that the optimal mass of rice husk silica was 8 g, while the optimal sonication time was 30 min. The product has a cylindrical pore shape with good crystallinity and pore structure regularity. The specific surface area (SBET), the pore diameter (DBJH), the specific pore volume (VBJH), and the wall thickness (WT) of the product were 601 m2 g–1, 4.76 nm, 0.88 mL g–1, and 5.02 nm, respectively. These results are not considerably different from the porosity of SBA-15, synthesized previously using conventional hydrothermal techniques from various silica sources. In addition, it is also comparable to the porosity of SBA-15 produced from TEOS by sonochemical methods as well as with commercial SBA-15.

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“…Previous research has proved that mesoporous silica carbon paste enhanced the current signal compared to carbon electrode [12]- [14]. The materials that are made from silica such as SBA-15 and SBA-16 provide 2D and 3D pore structure.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mesoporous Silica Addition on Electrochemical Properties of Carbon Electrode

Saad,

Jalil*,

Zain

et al. 2019

IJEAT

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Mesoporous silica is material that possesses the pore sizes between 2 nm to 50 nm which had expanded their applications rapidly. In this study, mesoporous SBA-15 and SBA-16 were synthesized via surfactant templating approach using triblock copolymer as directing agent and tetraethyl orthosilicate (TEOS) as silica source. The synthesized materials were characterized by X-ray diffraction (XRD) spectroscopy, scanning electron microscopy (SEM) and nitrogen absorption-desorption tests. The pore diameters are 5.5 nm and 3.2 nm for SBA-15 and SBA-16 respectively, were determined with BJH method based on adsorption data. Three different electrodes were fabricated, carbon paste electron (CPE) and two modified carbon paste electrodes (MCPE): SBA-15/MPCE and SBA-16/MPCE. The fabricated electrodes were tested using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). SBA-16/MCPE showed better adsorption, enhanced the response signal to 81% and a lower resistance (4.04KΩ). The synthesized mesoporous materials have the potential to be used in the development of high performance, lightweight and flexible devices in electrochemistry

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Mesoporous Silica Electrochemical Sensors for the Detection of Ascorbic Acid and Uric Acid

Cited by 3 publications

References 29 publications

Electrochemical Properties of Mesoporous Silica (Sba-15)-Carbon Electrode

Electrochemical Properties of Mesoporous Silica (Sba-15)-Carbon Electrode

Optimizing Rice Husk Silica Mass and Sonication Time for a More Efficient and Environmentally Friendly Synthesis of SBA-15

Effects of Mesoporous Silica Addition on Electrochemical Properties of Carbon Electrode

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