Iron Nitride Nanoparticles for Enhanced Reductive Dechlorination of Trichloroethylene
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F22%3AA2302DX4" target="_blank" >RIV/61988987:17310/22:A2302DX4 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15640/22:73618694
Result on the web
<a href="http://dx.doi.org/10.1021/acs.est.1c08282" target="_blank" >http://dx.doi.org/10.1021/acs.est.1c08282</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.est.1c08282" target="_blank" >10.1021/acs.est.1c08282</a>
Alternative languages
Result language
angličtina
Original language name
Iron Nitride Nanoparticles for Enhanced Reductive Dechlorination of Trichloroethylene
Original language description
Nitriding has been used for decades to improve the corrosion resistance of iron and steel materials. Moreover, iron nitrides (FexN) have been shown to give an outstanding catalytic performance in a wide range of applications. We demonstrate that nitriding also substantially enhances the reactivity of zerovalent iron nanoparticles (nZVI) used for groundwater remediation, alongside reducing particle corrosion. Two different types of FexN nanoparticles were synthesized by passing gaseous NH3/N2 mixtures over pristine nZVI at elevated temperatures. The resulting particles were composed mostly of face-centered cubic (γ′-Fe4N) and hexagonal close-packed (εFe2–3N) arrangements. Nitriding was found to increase the particles’ water contact angle and surface availability of iron in reduced forms. The two types of FexN nanoparticles showed a 20- and 5-fold increase in the trichloroethylene (TCE) dechlorination rate, compared to pristine nZVI, and about a 3-fold reduction in the hydrogen evolution rate. This was related to a low energy barrier of 27.0 kJ mol–1 for the first dechlorination step of TCE on the γ′Fe4N(001) surface, as revealed by density functional theory calculations with an implicit solvation model. TCE dechlorination experiments with aged particles showed that the γ′Fe4N nanoparticles retained high reactivity even after three months of aging. This combined theoretical-experimental study shows that FexN nanoparticles represent a new and potentially important tool for TCE dechlorination.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21001 - Nano-materials (production and properties)
Result continuities
Project
<a href="/en/project/EF16_019%2F0000754" target="_blank" >EF16_019/0000754: Nanotechnologies for Future</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Enviromental Science and Technology
ISSN
0013-936X
e-ISSN
1520-5851
Volume of the periodical
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Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
4425-4436
UT code for WoS article
000812210800001
EID of the result in the Scopus database
2-s2.0-85126515396