Nanostructured hematite thin films produced by spin-coating deposition solution: Application in water splitting

Souza, Flávio L.; Lopes, Kírian Pimenta; Nascente, P. A. P.; Leite, Edson R.

doi:10.1016/j.solmat.2008.11.049

Cited by 177 publications

(86 citation statements)

References 45 publications

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“…21 In addition, weak signals typical for hematite (012) can be observed in the nanoparticles coated with an aminosilane shell. 22 For particles covered with gold, the crystalline structure of metallic gold can be observed. 23 The coherent diffraction zone was calculated from the width of the X-ray diffraction peaks using the Debye-Scherrer approximation, 24 and was found to be 10±2 nm, 11±2 nm, and 15±2 nm for …”

Section: Resultsmentioning

confidence: 99%

Gold-functionalized magnetic nanoparticles restrict growth of Pseudomonas aeruginosa

Niemirowicz¹,

Święcicka²,

Wilczewska³

et al. 2014

IJN

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Superparamagnetic iron oxide nanoparticles (SPIONs) and their derivatives (aminosilane and gold-coated) have been widely investigated in numerous medical applications, including their potential to act as antibacterial drug carriers that may penetrate into bacteria cells and biofilm mass. Pseudomonas aeruginosa is a frequent cause of infection in hospitalized patients, and significant numbers of currently isolated clinical strains are resistant to standard antibiotic therapy. Here we describe the impact of three types of SPIONs on the growth of P. aeruginosa during long-term bacterial culture. Their size, structure, and physicochemical properties were determined using transmission electron microscopy, X-ray diffraction analysis, and Fourier transform infrared spectroscopy. We observed significant inhibition of P. aeruginosa growth in bacterial cultures continued over 96 hours in the presence of gold-functionalized nanoparticles (Fe 3 O 4 @Au). At the 48-hour time point, growth of P. aeruginosa , as assessed by the number of colonies grown from treated samples, showed the highest inhibition (decreased by 40%). These data provide strong evidence that Fe 3 O 4 @Au can dramatically reduce growth of P. aeruginosa and provide a platform for further study of the antibacterial activity of this nanomaterial.

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Section: Resultsmentioning

confidence: 99%

Gold-functionalized magnetic nanoparticles restrict growth of Pseudomonas aeruginosa

Niemirowicz¹,

Święcicka²,

Wilczewska³

et al. 2014

IJN

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show abstract

“…Moreover, the metal precursor is required to be stable in stock solution, which limits its application in depositing other films. Other methods, such as spin coating [72], spray pyrolysis [73], can be used to deposit uniform metal oxide film. But they usually lead to compact film with low specific area which is disadvantage for the surface reaction.…”

Section: Wet Chemical Depositionmentioning

confidence: 99%

Photoelectrode for water splitting: Materials, fabrication and characterization

Wang

2018

Sci. China Mater.

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“…Zinc oxide nanorods (ZnONRs) have also been extensively used as photocatalysts for H 2 and O 2 production from water because of their wide band gap energy, high electron mobility and low charge recombination due to the longer electron lifetimes 9 . These properties make TiNT and ZnONRs more promising photocatalysts compared with other widely studied materials, such as platinum-group catalysts, which are expensive, as well as catalysts for the conversion of H 2 and O 2 back to water 2 and Fe 2 O 3 , which exhibit low electron conductivity and high electron-hole recombination rates [10][11][12][13] . Table 1 summarizes recent advances involving the application of TiNT and ZnONR for the development of photocatalysts and photoanodes for water splitting experiments.…”

Section: Introductionmentioning

confidence: 99%

Multihierarchical electrodes based on titanate nanotubes and zinc oxide nanorods for photoelectrochemical water splitting

et al. 2016

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a Studies involving water splitting to form hydrogen and oxygen have attracted attention because H2is considered the fuel of the future. Photoelectrocatalysts have been widely used for this application, and several metal oxides can be applied as catalysts. Among them, we highlight zinc oxide nanorods (ZnONRs) and titanate nanotubes (TiNTs); however, their individual nanostructures exhibit disadvantages. For example, ZnONR shows rapid recombination of the photogenerated charges, and TiNT gives rise to randomly orientated films; these disadvantages limit their application as photoanodes. In this study, for the first time, we present a new class of multihierarchical electrodes based on TiNT-decorated ZnONR films that exhibited superior results to the individual species. The TiNTs are homogenously dispersed over the surface of the rods without forming agglomerates, giving rise to a heterojunction that exhibits lower recombination rates. It was found that the results are better when the contents of TiNT in the electrode are higher; thus, glycine was successfully used as a bridge to link both of the structures, increasing the amount of TiNT decorating the rods. As a result, the photocurrent generated with these multihierarchical electrodes is higher than that obtained for pure ZnONR electrodes (0.9 mA and 0.45 mA, respectively), and the electrode potentials for O2 evolution is lower than that observed for pure TiNT electrodes (0 V and 0.8 V vs. ERHE, respectively). The IPCE values are also higher for the multihierarchical electrodes.

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Nanostructured hematite thin films produced by spin-coating deposition solution: Application in water splitting

Cited by 177 publications

References 45 publications

Gold-functionalized magnetic nanoparticles restrict growth of Pseudomonas aeruginosa

Gold-functionalized magnetic nanoparticles restrict growth of Pseudomonas aeruginosa

Photoelectrode for water splitting: Materials, fabrication and characterization

Multihierarchical electrodes based on titanate nanotubes and zinc oxide nanorods for photoelectrochemical water splitting

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