Nanoarchitecture of advanced core-shell zero-valent iron particles with controlled reactivity for contaminant removal

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73588248" target="_blank" >RIV/61989592:15310/18:73588248 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1385894718314827" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1385894718314827</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2018.08.015" target="_blank" >10.1016/j.cej.2018.08.015</a>

Result language

angličtina

Original language name

Nanoarchitecture of advanced core-shell zero-valent iron particles with controlled reactivity for contaminant removal

Original language description

The optimization of nanoscale zero-valent iron (nZVI) for groundwater remediation applications requires consideration of properties that influence its longevity and transport in porous media and reactivity with contaminants. Here, we report on the stabilization of nZVI by controlled growth of oxide shells of varying thickness and characterization of the resulting materials&apos; structure and reactivity. Using a thermal oxidation method, nZVI was prepared with shell thickness varying between 4 and 10 nm. These nZVI materials, together with pyrophoric nZVI (without a passivating oxide coating) and two commercial nZVI materials (NANOFER STAR and NANOFER 25), were characterized in detail with respect to morphology, shell thickness, structure, magnetism, stability, and reactivity. The results show that increasing oxidation temperature results in thicker oxide coatings on the particles, but these coatings also have more fractures and other defects. The reactivity of these particles, demonstrated on Cr(VI) and Cu(II) removal, increases with increasing shell thickness, probably as a result of higher extent of defects in thicker shell. Therefore the ability to control thickness and character of the shell leads to possibility to controlling reactivity while keeping comparable content of Fe(0) in the material. These nZVI materials with 7 and 10 nm oxide shell prepared via simple solid-gas synthesis can be used as a suitable alternative to common air-stable nZVI without additional activation steps.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

CHEMICAL ENGINEERING JOURNAL

ISSN

1385-8947

e-ISSN

—

Volume of the periodical

354

Issue of the periodical within the volume

DEC

Country of publishing house

CH - SWITZERLAND

Number of pages

11

Pages from-to

335-345

UT code for WoS article

000445413900034

EID of the result in the Scopus database

2-s2.0-85051263201