Chemoresistive sensor for hydrogen using thin films of tin dioxide doped with cerium and palladium

Deivasegamani, Revathy; Karunanidhi, Govardhan; Santhosh, Chella; Tamilselvi, Gopal; achari, Divyalakshmi Saravana; Neogi, Ajita; Nivetha, Ravi; Pradeep, Natarajan; Venkatraman, Uma; Bhatnagar, Amit; Jeong, Soon Kwan; Grace, Andrews Nirmala

doi:10.1007/s00604-017-2514-7

Cited by 15 publications

(5 citation statements)

References 34 publications

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“…With increasing molarities of both iron sources, more materials are available for the growth phase, leading to the synthesis of aggregates with larger diameters [39]. This trend is congruent with the findings of Schwaminger et al [50][51][52].…”

Section: Resultssupporting

confidence: 88%

Molarity Effects of Fe and NaOH on Synthesis and Characterisation of Magnetite (Fe3O4) Nanoparticles for Potential Application in Magnetic Hyperthermia Therapy

et al. 2022

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In this study, the effect of molarity on the structural, magnetic, and heat dissipation properties of magnetite nanoparticles (MNPs) was investigated to optimise the parameters for potential application in magnetic hyperthermia therapy (MHT). MHT works based on the principle of local temperature rise at the tumour site by magnetic iron oxide nanoparticles (MIONPs) with the application of an alternating magnetic field. MHT is a safe method for cancer treatment and has minimal or no side effects. Magnetite (Fe3O4) is the best material among MIONPs to be applied in local MHT due to its biocompatibility and high saturation magnetisation value. MNPs were prepared by co-precipitation at varying molarity. Structural characterisation was performed via X-ray powder diffraction (XRD) for crystalline structure analysis and field-emission scanning electron microscopy (FESEM) for morphology and particle size analysis. Measurement of the magnetic properties of the as-synthesised MNPs was carried out using a vibrating sample magnetometer (VSM). Power loss (P) was determined theoretically. The increase in molarity resulted in significant effects on the structural, magnetic, and heat dissipation properties of MNPs. The particle size and saturation magnetisation (Ms) decreased with the gradual addition of base but increased, together with crystallinity, with the gradual addition of iron source. M3 recorded the smallest crystalline size at 3.559 nm. The sample with the highest molarity (M4) displayed the highest heat generation capacity with a p value of up to 0.4056 W/g. High p values at the nano-scale are crucial, especially in local MHT, for effective heat generation, thus proving the importance of molarity as a vital parameter during MNP synthesis.

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Section: Resultssupporting

confidence: 88%

Molarity Effects of Fe and NaOH on Synthesis and Characterisation of Magnetite (Fe3O4) Nanoparticles for Potential Application in Magnetic Hyperthermia Therapy

et al. 2022

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“…The electrode's shape, size, and position in the channel produce a nonuniform electric field gradient [59]. Metals, for instance, gold (Au), silver (Ag), chromium (Cr), platinum (Pt), and titanium (Ti), are commonly used to implement electrode geometries [60][61][62]. Which includes planar [63,64], interdigitated [65,66], quadrupole [3], tapered [45,[67][68][69][70][71][72][73], rectangular [74], curved [75], and spiral electrodes [4,35].…”

Section: Dep Devices For Biological Fluid Applicationsmentioning

confidence: 99%

A correlation of conductivity medium and bioparticle viability on dielectrophoresis‐based biomedical applications

et al. 2023

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Dielectrophoresis (DEP) bioparticle research has progressed from micro to nano levels. It has proven to be a promising and powerful cell manipulation method with an accurate, quick, inexpensive, and label-free technique for therapeutic purposes. DEP, an electrokinetic phenomenon, induces particle movement as a result of polarization effects in a nonuniform electrical field. This review focuses on current research in the biomedical field that demonstrates a practical approach to DEP in terms of cell separation, trapping, discrimination, and enrichment under the influence of the conductive medium in correlation with bioparticle viability. The current review aims to provide readers with an in-depth knowledge of the fundamental theory and principles of the DEP technique, which is influenced by conductive medium and to identify and demonstrate the biomedical application areas. The high conductivity of physiological fluids presents obstacles and opportunities, followed by bioparticle viability in an electric field elaborated in detail. Finally, the drawbacks of DEP-based systems

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“…19 A suitable solution for the consistent performance of the membrane for longer lifetime requires alloying Pd with other metals to eliminate or minimize the drawbacks witnessed using pure Pd membranes. 14 For this reason, Pd can be alloyed with other metals such as copper, 20 gold, 21 nickel, 22 silver, 23 titanium, 24 platinum, 25 tungsten, 26 indium, 27 rhenium, 28 yttrium, 29 cerium, 30 molybdenum, 31 ruthenium, 32 rhodium, 33 etc. When Pd is alloyed with these metals, its critical temperature for formation of Pd hydride is reduced.…”

Section: General Properties Of Palladium and Its Alloysmentioning

confidence: 99%

Palladium-Alloy Membrane Reactors for Fuel Reforming and Hydrogen Production: A Review

et al. 2021

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Hydrogen has a potential to be a clean energy carrier that emits only water after combustion and can be produced from diverse feedstocks. Hydrogen has much better combustion characteristics in conventional combustion systems and higher energy efficiency when used with fuel cells. More than 75 million tons of hydrogen are currently produced primarily using fossil fuels as feedstock via steam methane reforming processes. Steam methane reforming is the mature technology for producing hydrogen and when coupled with CO2 capture can help address climate challenges. Inorganic palladium (Pd) membranes have demonstrated great potential to separate hydrogen due to their stability and high selectivity for hydrogen. In this review, several methods of fabricating Pd-alloy membranes are discussed and compared in terms of membrane stability and selectivity of hydrogen. Such methods include electroless plating (ELP), chemical vapor deposition (CVD), physical vapor deposition (PVD), and electroplating deposition (EPD). The permeability of hydrogen in different Pd-based alloy membranes are presented and compared. Focus has been made, in this review, on Pd–Ag, Pd–Cu, Pd–Au, and Pd–Ru alloys. The effects of impurities (H2S, CO, O2, and CO2) on performance of different Pd-based alloy membranes are also investigated. Moreover, the subject of using Pd-membrane reactors for fuel reforming and H2 production is investigated in detail based on numerous experimental and numerical studies in the literature, considering different membrane reactor designs: axial-flow tubular, radial-flow tubular, axial-flow spherical, packed-bed, fluidized bed, and slurry bubble column. The performance of Pd-membranes in such reactors for hydrogen production is compared, and the effects of temperature, pressure, H2O/CH4 ratio, and residence time on reformer performance are also investigated. Finally, the use of computational methods, particularly, density functional theory (DFT), to complement well-established experimental methods for studying the diffusion of H and its isotopes in different metals is reviewed. The review concludes with some insights into future work to bring Pd-membrane reactors to the level required for hydrogen production at the commercial level.

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Chemoresistive sensor for hydrogen using thin films of tin dioxide doped with cerium and palladium

Cited by 15 publications

References 34 publications

Molarity Effects of Fe and NaOH on Synthesis and Characterisation of Magnetite (Fe3O4) Nanoparticles for Potential Application in Magnetic Hyperthermia Therapy

Molarity Effects of Fe and NaOH on Synthesis and Characterisation of Magnetite (Fe3O4) Nanoparticles for Potential Application in Magnetic Hyperthermia Therapy

A correlation of conductivity medium and bioparticle viability on dielectrophoresis‐based biomedical applications

Palladium-Alloy Membrane Reactors for Fuel Reforming and Hydrogen Production: A Review

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