Electrochemical synthesis of FeS2 thin film: An effective material for peroxide sensing and terephthalic acid degradation

Jana, Sumanta; Mondal, Palash; Tripathi, S. N.; Mondal, Anup; Chakraborty, Biswajit

doi:10.1016/j.jallcom.2015.06.168

Cited by 11 publications

(4 citation statements)

References 52 publications

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“…To understand this visual observation, CoOP‐15 was characterized by using several analytical techniques (PXRD, FESEM, and XPS) after 10 min of electrocatalysis. PXRD analysis showed crystalline peaks for ITO only (JCPDS 44–1087) (Figure S8 a in the Supporting Information), which suggests that the amorphous characteristics of the nanomaterial did not change during water oxidation. The presence of Co and O was confirmed by EDS analysis (Figure S8 b and c in the Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Cobalt Phosphonates as Precatalysts for Water Oxidation: Role of Pore Size in Catalysis

Saha

Chowdhury

Jash

et al. 2017

Chemistry A European J

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We report a simple approach for the synthesis of cobalt phosphonate (CoOP) nanocages with two distinct types of pore diameters by utilizing a novel tetra-constituent assembly of CoCl ⋅6 H O, nitrilotris(methylene)triphosphonic acid (NMPA), F127 surfactant, and polyvinyl alcohol (PVA, co-surfactant). Transmission electron microscopy images revealed the formation of large nanocages in spheres (pore diameter: 20-60 nm) and the existence of narrow micro/mesopores (pore diameter: 1.5-5 nm) on their walls. Brunauer-Emmett-Teller adsorption/desorption experiments led to the observation of dual porosity and indicated that the contribution of micro/mesopores increased gradually with increasing concentration of PVA during synthesis from CoOP-0 to CoOP-15 (where the number gives the wt % of PVA used in CoOP synthesis). These materials acted as precatalysts for heterogeneous water oxidation at pH 13.9 (1 m KOH) and electrochemical studies revealed that the reactivity improved remarkably with increasing contribution of narrow micro/mesopores. Among these catalysts, the best catalyst (CoOP-15) exhibited an overpotential of 380 mV and turnover frequency of 1.6×10 s . The improvement of reactivity was due to significant enhancement of electrochemically accessible surface area with increasing contribution of narrow micro/mesopores, which facilitated contact between the catalyst and water molecules by improving mass transport inside the nanomaterials. Hence, this study suggests narrow micro/mesopores are beneficial towards enhancement of water oxidation catalysis.

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Section: Resultsmentioning

confidence: 99%

Cobalt Phosphonates as Precatalysts for Water Oxidation: Role of Pore Size in Catalysis

Saha

Chowdhury

Jash

et al. 2017

Chemistry A European J

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“…To prepare pyrite FeS 2 , there are several methods like atomic layer deposition , chemical vapor deposition , hot injection etc. These methods are complicated and employ sophisticated process steps.…”

Section: Introductionmentioning

confidence: 99%

FeS₂ Grown Pencil Graphite as an In‐expensive and Non‐enzymatic Sensor for Sensitive Detection of Uric Acid in Non‐invasive Samples

2019

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While most electrochemical uric acid (UA) sensors are developed on the conventional electrodes and involve either multiple steps based synthesis routes and/or complicated fabrication processes, this paper is the first demonstration of direct growth of pyrite FeS2 on pencil‐graphite electrode (PGE) for non‐enzymatic UA sensing. FESEM images of the pyrite FeS2‐PGE reveal mesoporous microspherical structure of pyrite FeS2 along with graphite flakes of PGE and EDX, Raman spectroscopic data validate growing of pyrite FeS2 on PGE. The pyrite FeS2‐PGE sensor exhibited detection limit of 6.7 μM, excellent linearity, reproducibility, selectivity over glucose, urea, ascorbic acid with the sensitivity of 370 μA mM−1 cm−2 in the range of 10–725 μM of UA. These improved analytical performances can be attributed to high conductivity of the pyrite FeS2, larger electro‐active surface area of the mesoporous microspherical pyrite FeS2 grown on PGE (than only PGE) and abundance in defect sites originating from both the pyrite FeS2 as well as functional groups of pencil graphite. Furthermore, the sensor was validated against UA in urine sample and the result supports well with the UA concentration achieved from colorimetric technique. Development of this low cost, non‐enzymatic, sensitive and highly selective pyrite FeS2‐PGE bases UA sensor is a significant step in the development of practically viable sensors for point‐of‐care applications in clinical and pharmaceutical analyses.

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“…The XRD patterns for Bi 2 Se 3 /ZnO deposited ITOs have been shown in Figure 1. Figure 1 shows the characteristic diffraction peaks of ITO as shown with asterisk () [27]. …”

Section: Structural Analysismentioning

confidence: 99%

Bi2se3 Sensitized Zno Nanorod Films for Improved Solar Cell Application

2017

IJAERD

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Electrochemical synthesis of FeS2 thin film: An effective material for peroxide sensing and terephthalic acid degradation

Cited by 11 publications

References 52 publications

Cobalt Phosphonates as Precatalysts for Water Oxidation: Role of Pore Size in Catalysis

Cobalt Phosphonates as Precatalysts for Water Oxidation: Role of Pore Size in Catalysis

FeS₂ Grown Pencil Graphite as an In‐expensive and Non‐enzymatic Sensor for Sensitive Detection of Uric Acid in Non‐invasive Samples

Bi2se3 Sensitized Zno Nanorod Films for Improved Solar Cell Application

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Electrochemical synthesis of FeS2 thin film: An effective material for peroxide sensing and terephthalic acid degradation

Cited by 11 publications

References 52 publications

Cobalt Phosphonates as Precatalysts for Water Oxidation: Role of Pore Size in Catalysis

Cobalt Phosphonates as Precatalysts for Water Oxidation: Role of Pore Size in Catalysis

FeS2 Grown Pencil Graphite as an In‐expensive and Non‐enzymatic Sensor for Sensitive Detection of Uric Acid in Non‐invasive Samples

Bi2se3 Sensitized Zno Nanorod Films for Improved Solar Cell Application

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FeS₂ Grown Pencil Graphite as an In‐expensive and Non‐enzymatic Sensor for Sensitive Detection of Uric Acid in Non‐invasive Samples