Noble metal sensitized SnO2/RGO nanohybrids as chemiresistive E-nose for H2, H2S and NO2 detection

Bhangare, Bhagyashri; Sinju, K. R.; Ramgir, Niranjan S.; Gosavi, Suresh; Debnath, A.K.

doi:10.1016/j.mssp.2022.106706

Cited by 13 publications

(9 citation statements)

References 21 publications

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“…These peaks were attributed to SnO 2 in the nanoparticle form. The absence of the metallic Sn doublet peaks at 493.2 and 484.8 eV indicated that Sn was easily oxidized when exposed to air. , Figure f shows the high-resolution XPS O 1s spectrum of Sn/rGO with four deconvoluted peaks at 530.8, 531.8, 532.4, and 533.0 eV for Sn–O, C–O, Sn–O–C, and C–O, respectively. The XPS results confirmed the chemical valence state of the Sn/rGO catalyst ink.…”

Section: Results and Discussionmentioning

confidence: 99%

Sensitive Portable Electrochemical Sensors for Antibiotic Chloramphenicol by Tin/Reduced Graphene Oxide-Modified Screen-Printed Carbon Electrodes

Bunnasit,

Thamsirianunt,

Rakthabut

et al. 2024

ACS Appl. Nano Mater.

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A sensitive electrochemical sensor for the determination of an antibiotic chloramphenicol (CAP) in real samples was developed since they have been widely used in medicine and veterinary practice. Therefore, in this present work, tin (Sn) and reduced graphene oxide (rGO) were used to modify and to enhance the sensitivity and selectivity of a disposable screenprinted carbon electrode (SPCE), along with a fast response and a simple preparation. Transmission electron microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, elemental mapping, and X-ray photoelectron spectroscopy were used to evaluate the synthesized Sn/rGO catalyst. The electrochemical performance of the Sn/rGO/SPCE was assessed for the determination of CAP under optimum conditions using differential pulse voltammetry, cyclic voltammetry, and electrochemical impedance spectroscopy. The Sn/rGO/SPCE showed two linear detection ranges at 0.5−30 μM with the linear regression I pc (μA) = 0.3895C (μM) + 0.1599 with R 2 = 0.9957 and at 30 to 100 μM with the linear regression I pc (μA) = 0.1161C (μM) + 8.1342 with R 2 = 0.9941. The limit of detection was 0.2 μM (S/N = 3) and limit of quantification was 0.7 μM (S/N = 10). The sensitivities for the lower and higher concentration ranges were 0.934 and 0.278 μA μM −1 cm −2 , respectively. Additionally, the Sn/rGO/SPCE showed great selectivity and anti-interference capabilities. The sensing and disposable Sn/rGO/SPCE sensor showed a great potential for CAP analysis in milk, honey, and eye drop samples with desirable percentage recovery.

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Section: Results and Discussionmentioning

confidence: 99%

Sensitive Portable Electrochemical Sensors for Antibiotic Chloramphenicol by Tin/Reduced Graphene Oxide-Modified Screen-Printed Carbon Electrodes

Bunnasit,

Thamsirianunt,

Rakthabut

et al. 2024

ACS Appl. Nano Mater.

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“…Several studies have been carried out on Sn-and carbonbased electrodes such as Sn/carbon fiber, [29] SnO/C, [30] SnO x / carbon paper, [13] SnO 2 /graphene [31] and ultrathin metal layers confined in graphene. [32] Most of the studies for developing tin oxide/rGO composite structures are based on generally thermal methods such as hydrothermal, [33][34][35][36][37] solvothermal, [38,39] thermal reducing, [7] and microwave-assisted hydrothermal methods. [40] Considering a large number of electrocatalyst development studies for the ECO 2 RR process, only a few studies have been based on electrodeposition methods.…”

Section: Introductionmentioning

confidence: 99%

Sn‐based chi‐rGO/SnO₂ Nanocomposite as an Efficient Electrocatalyst for CO₂ Reduction to Formate

Rende,

Kayan,

Colakerol Arslan

et al. 2024

ChemElectroChem

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Designing efficient and cost‐effective electrocatalysts in simple ways is very important for energy efficiency. In this sense, nano‐sized materials have been extensively utilized for the development of efficient electrodes for electrochemical CO2 reduction. In the present study, we have developed a Sn/chitosan‐reduced graphene oxide (chi‐rGO)/SnO2 composite electrode via only electrochemical techniques and tested it for electrochemical reduction of CO2 to formate. A bare Sn plate was modified with a reduced graphene oxide layer in the presence of chitosan to get a stable Sn/chi‐rGO composite structure and to get more active sites, thus an efficient reduction process was performed. The surface of the Sn/chi‐rGO composite was further modified by SnO2 nanoparticles via the potentiostatic electrodeposition method at a fixed applied potential of −0.6 V for varying periods. The calculated double‐layer capacitance (Cdl) of the Sn/chi‐rGO/SnO2 electrode was about 80 times larger than the bare Sn plate implying that the coexistence of SnO2 nanoparticles on the (chi‐rGO) structure enhanced the electrochemically active sites. The maximum Faradaic efficiency was recorded as 88 % towards the production of formate at an average current density of −7.36 mAcm−2 at −1.8 V. Electrochemical measurements and the stability test revealed that the resultant Sn/chi‐rGO/SnO2 composite structure behaves as a potential electrode material for efficient CO2 conversion to formate.The study presents a simple and low‐cost electrode preparation procedure including only electrochemical techniques which can be conducted within a very short time and without using extra energy and chemicals/additives.

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“…At present, complex multicomponent Pt (or Pd)/SnO 2 /RGO catalysts are being studied in various fields as gas-sensitive materials in gas sensors [23][24][25][26] and electrocatalysts for direct methanol fuel cells (DMFC) [27,28].…”

Section: Introductionmentioning

confidence: 99%

Study of the Cathode Pt-Electrocatalysts Based on Reduced Graphene Oxide with Pt-SnO2 Hetero-Clusters

Spasov,

Ivanova,

Mensharapov

et al. 2023

Inorganics

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A complex study of the structure, morphology, and electrochemical properties of the Pt20/SnO210/RGO electrocatalyst is presented. The advantage of the chemical synthesis of reduced graphene oxide (c-RGO) compared to thermal methods (t-RGO) is due to the formation of graphene plates with amorphous carbon black agglomerates and the chemical composition of the surface. The nature of the interaction between platinum and tin dioxide particles and a conclusion about the formation of heterostructures Pt-SnO2 with the surface interaction of lattices excluding the formation of hetero phases has been established. This achieves high dispersity during the formation of platinum particles without significant agglomeration and increases the electrochemical surface area (ESA) of platinum to 85 m2 g−1 vs. carbon black. In addition, the surface interaction of particles and the formation of hetero-clusters Pt-SnO2 can cause the improved activity and stability of the Pt20/SnO210/c-RGO electrocatalyst.

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Noble metal sensitized SnO2/RGO nanohybrids as chemiresistive E-nose for H2, H2S and NO2 detection

Cited by 13 publications

References 21 publications

Sensitive Portable Electrochemical Sensors for Antibiotic Chloramphenicol by Tin/Reduced Graphene Oxide-Modified Screen-Printed Carbon Electrodes

Sensitive Portable Electrochemical Sensors for Antibiotic Chloramphenicol by Tin/Reduced Graphene Oxide-Modified Screen-Printed Carbon Electrodes

Sn‐based chi‐rGO/SnO₂ Nanocomposite as an Efficient Electrocatalyst for CO₂ Reduction to Formate

Study of the Cathode Pt-Electrocatalysts Based on Reduced Graphene Oxide with Pt-SnO2 Hetero-Clusters

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Noble metal sensitized SnO2/RGO nanohybrids as chemiresistive E-nose for H2, H2S and NO2 detection

Cited by 13 publications

References 21 publications

Sensitive Portable Electrochemical Sensors for Antibiotic Chloramphenicol by Tin/Reduced Graphene Oxide-Modified Screen-Printed Carbon Electrodes

Sensitive Portable Electrochemical Sensors for Antibiotic Chloramphenicol by Tin/Reduced Graphene Oxide-Modified Screen-Printed Carbon Electrodes

Sn‐based chi‐rGO/SnO2 Nanocomposite as an Efficient Electrocatalyst for CO2 Reduction to Formate

Study of the Cathode Pt-Electrocatalysts Based on Reduced Graphene Oxide with Pt-SnO2 Hetero-Clusters

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Sn‐based chi‐rGO/SnO₂ Nanocomposite as an Efficient Electrocatalyst for CO₂ Reduction to Formate