Iron Oxide Nanoparticles for Next Generation Gas Sensors

Long, Nguyen Viet; Teranishi, Toshiharu; Yang, Yong; Thi, Cao Minh; Nogami, Masayuki

doi:10.15344/2455-2372/2015/119

Cited by 47 publications

(26 citation statements)

References 80 publications

(204 reference statements)

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“…Long et al, reported the gas-sensing mechanisms of ferric oxide are generally based on the direct chemisorption or a surface state associated with the adsorbed oxygen on the surface of p-or n-type metal oxide. Also, they explained that the gas sensing properties of ferric oxide were improved as reducing the diameter and increasing their surface area [29]. In the light of the literature, we tested oxygen sensitivity of the ruthenium dye when used along with maghemite and ionic liquid expecting an enhancement in the emission performance of the dye through O2 adsorption ability of ferric oxide.…”

Section: Effect Of Additives On Oxygen Sensing Ability Of the [Ru(bpymentioning

confidence: 99%

Enhancement of Optical Oxygen Sensing Properties of [Ru(bpy)3]2+- Based Composites Along With Maghemite and Ionic Liquid

Oğuzlar¹,

Ongun²

2019

NWSA

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In this study, we measured oxygen-induced emission and decaytime data of tris(2,2′-bipyridyl)ruthenium(II) chloride dye in the presence of additives, maghemite and ionic liquid, 1-butyl-3methylimidazolium tetrafluoroborate. The fluorescent dye along with the additives was embedded in ethylcellulose matrix that was used as supporting material in form of thin-film and electrospun mat. The synthesized maghemite was used to enhance the oxygen sensitivity and linear working range of the dye. Ionic liquid (IL) was used to increase the stability and sensitivity of the sensing fluorophore. Together with the additives ruthenium dye-based composites exhibited higher Stern-Volmer constant (KSV), relative signal change and larger linear response. High relative signal change and KSV values mean that fluorophore has a better oxygen gas sensitivity.Stern-Volmer values of thin-film and microporous mats were found 1.64×10 −2 and 2.21×10 −2 , the relative signal changes (I0/I) were calculated as 2.64 and 3.21, respectively. There is no previous work about the utilization of both maghemite and ionic liquid additives together for the enhancement of oxygen sensitivity of the ruthenium.

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Section: Effect Of Additives On Oxygen Sensing Ability Of the [Ru(bpymentioning

confidence: 99%

Enhancement of Optical Oxygen Sensing Properties of [Ru(bpy)3]2+- Based Composites Along With Maghemite and Ionic Liquid

Oğuzlar¹,

Ongun²

2019

NWSA

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“…The selection of the iron oxide NPs as the model system is justified based on the number of important applications in the field of catalysis, pigments, electronic energy devices (like lithium ion batteries, fuel cell), medical/biomedical applications (like diagnostics magnetic resonance imaging, drug delivery, targeted thermos-sensitive chemotherapy, and cancer treatment), wastewater treatment, etc. [14][15][16][36][37][38][39][40][41][42][43][44][45][46][47][48][49].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of iron oxide nanoparticles in a continuous flow spiral microreactor and Corning® advanced flow™ reactor

Suryawanshi

Sonawane

Bhanvase

et al. 2018

Green Processing and Synthesis

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Abstract:In the present work, synthesis of iron oxide nanoparticles (NPs) using continuous flow microreactor (MR) and advanced flow™ reactor (AFR™) has been investigated with evaluation of the efficacy of the two types of MRs. Effect of the different operating parameters on the characteristics of the obtained NPs has also been investigated. The synthesis of iron oxide NPs was based on the co-precipitation and reduction reactions using iron (III) nitrate precursor and sodium hydroxide as reducing agents. The iron oxide NPs were characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy, and X-ray diffraction (XRD) analysis. The mean particle size of the obtained NPs was less than 10 nm at all flow rates (over the range of 20−60 ml/h) in the case of spiral MR, while, in the case of AFR™, the particle size of NPs was below 20 nm with no specific trend observed with the operating flow rates. The XRD and TEM analyses of iron oxide NPs confirmed the crystalline nature and nanometer size range, respectively. Further, magnetic properties of the synthesized iron oxide NPs were studied using electron spin resonance spectroscopy; the resonance absorption peak shows the g-factor values as 2.055 and 2.034 corresponding to the magnetic fields of 319.28 and 322.59 mT for MR and AFR™, respectively.

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“…According to their particle size ranges, they are used for life, energy, environment, biology and medicine (nanomedicine) [2]. Recently, Fe oxide micro/nanostructures have been used for gas sensors for the detection of common toxic gases [5][6][7], especially as CO gas in industrial processes. There are so many methods and processes of making Fe oxide particles with the different morphologies, shapes, and sizes [5,6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Surfaces of Novel Iron Oxides With Grain and Grain Boundary

Long¹

2018

JST

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Hierarchical nano/microscale α-Fe2O3 iron oxide particle system was prepared by an improved and modified polyol method with the use of NaBH4 agent with high heat treatment at 900 °C in air. Here, α-Fe2O3 iron oxide particles with different shapes were analyzed. The morphologies of the surfaces of α-Fe2O3 iron oxide particles show the oxide structures with the different nano/microscale ranges of grain sizes. In this research, we have found that grain and grain boundary growth limits can be determined in α-Fe2O3 iron oxide structure. This leads to the possibility of producing new iron oxide structures with distribution of desirable size grain and grain boundary. With α-Fe2O3 structure obtained, the magnetic properties of the α-Fe2O3 iron oxide system are different from those of previously reported studies. in national and international studies.Keywords: Iron iron oxides, α-Fe2O3, chemical polyol methods, heat treatment.

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Iron Oxide Nanoparticles for Next Generation Gas Sensors

Cited by 47 publications

References 80 publications

Enhancement of Optical Oxygen Sensing Properties of [Ru(bpy)3]2+- Based Composites Along With Maghemite and Ionic Liquid

Enhancement of Optical Oxygen Sensing Properties of [Ru(bpy)3]2+- Based Composites Along With Maghemite and Ionic Liquid

Synthesis of iron oxide nanoparticles in a continuous flow spiral microreactor and Corning® advanced flow™ reactor

Investigation of Surfaces of Novel Iron Oxides With Grain and Grain Boundary

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