Sol-gel synthesis of cubic titanium dioxide nanoparticle using poly(ethylene glycol) as a capping agent: voltammetric simultaneous determination of uric acid and guanine

Biswas, Sudip; Pradhan, Susmita; Naskar, Hemanta; Bandyopadhyay, Rajib; Pramanik, Panchanan

doi:10.1007/s00604-018-3042-9

Cited by 20 publications

(9 citation statements)

References 33 publications

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“…The diffusion coefficient (D) of the electrochemical process at the sensor surface was investigated using the chronoamperometry method. 35 Chronoamperometric measurements of different concentrations of ED were performed and are presented in Figure 4. A plot between the slope of current (I ED ) vs square root of (time)1/2 (t −1/2 )(s −1/2 ) μA s −1/2 linear plot with concentration (C ED ) showed a linear dependence from 1 to 200 μM.…”

Section: ■ Results and Discussionmentioning

confidence: 75%

“…All the obtained values are presented in Table . The diffusion coefficient ( D ) of the electrochemical process at the sensor surface was investigated using the chronoamperometry method . Chronoamperometric measurements of different concentrations of ED were performed and are presented in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…The effective electrocatalytic surface areas of the electrodes were calculated using Randles−Sevcik formula. 35 According to the equation,…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Ultrasmall Au(0) Inserted Hollow PCN-222 MOF for The High-Sensitive Detection of Estradiol

et al. 2020

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Here, the effect of morphology on the electrocatalytic activity of metal–organic framework (MOF) was investigated. Post synthetic gold (Au) insertion was done into hollow PCN-222 (HPCN-222) and solid PCN-222 (SPCN-222) frameworks by a simple hydrothermal method. The crystalline nature, chemical composition, and morphologies of the synthesized MOFs were characterized by PXRD, XPS, and TEM. Electrochemical characterizations were done by cyclic voltammetry and electrochemical impedance spectroscopy. The excellent electrocatalytic activity of highly small-sized Au(0) with the enhancement of electrical conductivity through a hopping mechanism combined with a hollow structure and high surface area in the HPCN-222 MOF hugely alters the electrochemical properties. Overall, a better electrocatalytic surface area, charge transfer coefficient, and catalytic activity were generated at the modified electrode. The hollow structure MOF showed better electrocatalytic activity than solid structured MOF. The AuHPCN-222 modified glassy carbon electrode (AuHPCN-222/GCE) electrochemical sensor was employed for the analytical analysis of estradiol (ED) in an optimum experimental condition. AuHPCN-222 showed selective and better electrocatalytic activity toward ED than GCE. The differential pulse voltammetric measurements by the fabricated sensor showed two linear determination ranges for ED; those are 0.01–1 and 1–220 μM. The measured limit of detection (m-LOD) was found to be 0.5 nM with the highest sensitivity of 2.2 μA μM cm–2. The analytical performances for the detection of ED in human urine and serum samples were done with reasonable recoveries (98%–103%) using the standard addition method. Also, the sensor showed better reproducibility and repeatability with stability.

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Section: ■ Results and Discussionmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

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Ultrasmall Au(0) Inserted Hollow PCN-222 MOF for The High-Sensitive Detection of Estradiol

et al. 2020

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“…21,31,32 The sol-gel method ranks among the most investigated synthesis route. 33,34 Biswas and coworkers prepared a pure anatase phase with a cubic shape via sol-gel method for electrochemical sensor applications. 34 Mutuma et al adopted the same method in order to evaluate the photocatalytic activity of mesoporous anatase-brookite and anatase-brookite-rutile TiO 2 nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…33,34 Biswas and coworkers prepared a pure anatase phase with a cubic shape via sol-gel method for electrochemical sensor applications. 34 Mutuma et al adopted the same method in order to evaluate the photocatalytic activity of mesoporous anatase-brookite and anatase-brookite-rutile TiO 2 nanoparticles. 33 In addition, we must also mention hydro-solvothermal route, which is another important method for titania design.…”

Section: Introductionmentioning

confidence: 99%

Controlling the growth of nanosized titaniaviapolymer gelation for photocatalytic applications

et al. 2020

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An “On‐Site Transformation” Strategy for Electrochemical Formation of TiO₂ Nanoparticles/Ti₃C₂T_x MXene/Reduced Graphene Oxide Heterojunction Electrode Controllably toward Ultrasensitive Detection of Uric Acid

Zhu,

Liu,

Zhou

et al. 2024

Small Structures

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Ascribing to the abundance of Ti element, exceptional electrical conductivity, and electrocatalytic performance, titanium carbide MXene (Ti3C2Tx, MX) is considered as an ideal conductive matrix and employed for in situ preparation of promising TiO2 NPs@MX/reduced graphene oxide (rGO) heterojunction electrodes for uric acid (UA) detection. However, the incapability of achieving the controllable growth and synthesis of TiO2 nanoparticles (NPs) on MX nanosheets is a bottleneck in fabricating optimal and controllable TiO2 NPs@MX hybrid. Herein, an “on‐site transformation strategy” is developed to synthetize TiO2 NPs@MX/rGO heterojunction platform controllably by in situ electrochemical oxidizing MX nanosheets at various treatment times. The proposed approach allows for the greater operability to controllably grow and synthetize TiO2 NPs on the surface of MX nanosheets. The heterojunction electrodes present a linear voltammetric response toward UA in the concentration range of 0.003–0.3 and 0.3–300 μm and a low detection limit of 0.78 nm (S/N = 3). Additionally, a handheld electrochemical system with a smartphone readout is developed for point‐of‐care health monitoring, enabling fast, precise, and specific recognition of UA in real urine samples. The study provides a facile and controllable approach to fabricate TiO2 NPs@MX/rGO heterojunction platform for future use in other biomolecules' detection.

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Sol-gel synthesis of cubic titanium dioxide nanoparticle using poly(ethylene glycol) as a capping agent: voltammetric simultaneous determination of uric acid and guanine

Cited by 20 publications

References 33 publications

Ultrasmall Au(0) Inserted Hollow PCN-222 MOF for The High-Sensitive Detection of Estradiol

Ultrasmall Au(0) Inserted Hollow PCN-222 MOF for The High-Sensitive Detection of Estradiol

Controlling the growth of nanosized titaniaviapolymer gelation for photocatalytic applications

An “On‐Site Transformation” Strategy for Electrochemical Formation of TiO₂ Nanoparticles/Ti₃C₂T_x MXene/Reduced Graphene Oxide Heterojunction Electrode Controllably toward Ultrasensitive Detection of Uric Acid

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Sol-gel synthesis of cubic titanium dioxide nanoparticle using poly(ethylene glycol) as a capping agent: voltammetric simultaneous determination of uric acid and guanine

Cited by 20 publications

References 33 publications

Ultrasmall Au(0) Inserted Hollow PCN-222 MOF for The High-Sensitive Detection of Estradiol

Ultrasmall Au(0) Inserted Hollow PCN-222 MOF for The High-Sensitive Detection of Estradiol

Controlling the growth of nanosized titaniaviapolymer gelation for photocatalytic applications

An “On‐Site Transformation” Strategy for Electrochemical Formation of TiO2 Nanoparticles/Ti3C2Tx MXene/Reduced Graphene Oxide Heterojunction Electrode Controllably toward Ultrasensitive Detection of Uric Acid

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An “On‐Site Transformation” Strategy for Electrochemical Formation of TiO₂ Nanoparticles/Ti₃C₂T_x MXene/Reduced Graphene Oxide Heterojunction Electrode Controllably toward Ultrasensitive Detection of Uric Acid