Fabrication of hematite (α-Fe 2 O 3 ) nanoparticles using electrochemical deposition

Meng, Qingling; Wang, Zuobin; Chai, Xiangyu; Weng, Zhankun; Ding, Ran; Dong, Litong

doi:10.1016/j.apsusc.2016.02.007

Cited by 54 publications

(17 citation statements)

References 42 publications

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“…The band gap energy of the hematite nanorod arrays were determined from the extrapolation of the linear side of the graph. The estimated optical band gap values of the samples are in the ranges between 2.1 eV to 2.2 eV, which consistent with the reported values in literature [22]. The performance of the fabricated hematite humidity sensors was measured through the variation of humidity conditions.…”

Section: Results and Analysissupporting

confidence: 88%

Impact of annealing temperature to the performance of hematite based humidity sensor

Ahmad¹,

Mamat²,

Khusaimi³

et al. 2019

IJEECS

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In the present study, hematite (α-Fe2O3) nanorod structure were grown on fluorine doped tin oxide coated glass substrate via sonicated immersion approach with variation of annealing temperature (350˚C – 600˚C) in one-hour treatment. The impact of varying the temperature of annealing treatment on crystalline phase, structure morphology, optical properties and humidity sensing performance of hematite were examined. X-ray diffraction pattern disclosed a rhombohedral structure with α-phase diffraction peaks. The surface morphology images taken from field emission scanning electron microscopy revealed that the hematite nanorod arrays were grown uniformly in all samples and the average diameters of nanorods were measured in the ranges between 55 and 80 nm. Ultraviolet–visible spectroscopy measurement spectra show that all samples exhibited good optical properties. The hematite humidity sensor sample annealed at 400°C has demonstrated the highest sensitivity response (S=177.78) to humidity range between 40%RH to 90%RH.

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Section: Results and Analysissupporting

confidence: 88%

Impact of annealing temperature to the performance of hematite based humidity sensor

Ahmad¹,

Mamat²,

Khusaimi³

et al. 2019

IJEECS

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“…The goethite was coated successfully proved by the increase of (110) characteristic peak and the intensity of all other peaks in GWRB. In the same way, the powder XRD pattern of HWRB appears the characteristic peaks of (012), (110), and (024) [26]. The increase of the intensity peaks in this case is associated with the increase quantity of deposited iron oxides on the surface of bricks.…”

Section: Statistical Analysesmentioning

confidence: 56%

Preparation and Removal Properties of Cimetidine from Aqueous Solution by Waste Bricks Incorporated with Different Iron Oxides

Zhang

Liu

et al. 2019

Applied Sciences

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In this study, to investigate the elimination of micropollutant from aqueous solutions by construction waste, waste red brick (WRB) with and without incorporated of iron species (goethite and hematite) were prepared by a simple method. The prepared materials were systematically characterized and batch experiments were conducted to study the elimination of typical micropollutant cimetidine from the water environment. Results showed that both two iron species could be successfully incorporated onto WRB and the main structure of WRB were maintained. The adsorption process of cimetidine onto bricks was fast due to the microstructure and useful adsorption sites on the surface of bricks. The Langmuir model fitted the experimental data better and the qmax of cimetidine increased about 24.4% and 39.6% for the incorporation of hematite and goethite, respectively. The pH values influenced the adsorption behavior greatly and the favorable pH value was around 6.0. The charge screening effect and competition adsorption may influence the adsorption behavior together. Due to the interaction between cimetidine and bricks, the outer-sphere complexation may be formed in the adsorption process. This study shows new methods for the elimination of the micropollutant from the water environment and offers useful guidelines for the reuse of construction waste.

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“…Indeed, the previously mentioned 'lotus effect' reveals that a hierarchical micro/nanostructure can significantly reduce retention, enabling cells to 'roll off' the surface. The fabrication of surfaces with well-defined nano-topographies provides a new avenue for the design of anti-adhesive/easily cleanable (and therefore hygienic) surfaces e depending on the intended environment of use [80,81].…”

Section: Impact Of Topography On Surface Effectivenessmentioning

confidence: 99%

Surface modifications for antimicrobial effects in the healthcare setting: a critical overview

Adlhart

Verran

Azevedo

et al. 2018

Journal of Hospital Infection

250

218

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The spread of infections in healthcare environments is a persistent and growing problem in most countries, aggravated by the development of microbial resistance to antibiotics and disinfectants. In addition to indwelling medical devices (e.g. implants, catheters), such infections may also result from adhesion of microbes either to external solid-water interfaces such as shower caps, taps, drains, etc., or to external solid-gas interfaces such as door handles, clothes, curtains, computer keyboards, etc. The latter are the main focus of the present work, where an overview of antimicrobial coatings for such applications is presented. This review addresses well-established and novel methodologies, including chemical and physical functional modification of surfaces to reduce microbial contamination, as well as the potential risks associated with the implementation of such anticontamination measures. Different chemistry-based approaches are discussed, for instance anti-adhesive surfaces (e.g. superhydrophobic, zwitterions), contact-killing surfaces (e.g. polymer brushes, phages), and biocide-releasing surfaces (e.g. triggered release, quorum sensing-based systems). The review also assesses the impact of topographical modifications at distinct dimensions (micrometre and nanometre orders of magnitude) and the importance of applying safe-by-design criteria (e.g. toxicity, contribution for unwanted acquisition of antimicrobial resistance, long-term stability) when developing and implementing antimicrobial surfaces.

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Fabrication of hematite (α-Fe 2 O 3 ) nanoparticles using electrochemical deposition

Cited by 54 publications

References 42 publications

Impact of annealing temperature to the performance of hematite based humidity sensor

Impact of annealing temperature to the performance of hematite based humidity sensor

Preparation and Removal Properties of Cimetidine from Aqueous Solution by Waste Bricks Incorporated with Different Iron Oxides

Surface modifications for antimicrobial effects in the healthcare setting: a critical overview

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