Photo-Fenton Degradation of Nitroaromatic Explosives by Light-Powered Hematite Microrobots: When Higher Speed Is Not What We Go For

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F21%3A43920185" target="_blank" >RIV/62156489:43210/21:43920185 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/21:PU142065

Výsledek na webu

<a href="https://doi.org/10.1002/smtd.202100617" target="_blank" >https://doi.org/10.1002/smtd.202100617</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/smtd.202100617" target="_blank" >10.1002/smtd.202100617</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Photo-Fenton Degradation of Nitroaromatic Explosives by Light-Powered Hematite Microrobots: When Higher Speed Is Not What We Go For

Popis výsledku v původním jazyce

Self-powered micromachines are considered a ground-breaking technology for environmental remediation. Light-powered Janus microrobots based on photocatalytic semiconductors asymmetrically covered with metals have recently received great interest as they can exploit light to move and contemporarily degrade pollutants in water. Although various metals have been explored and compared to design Janus microrobots, the influence of the metal layer thickness on motion behavior and photocatalytic properties of microrobots have not been investigated yet. Here, light-driven hematite/Pt Janus microrobots are reported and fabricated by depositing Pt layers with different thickness on hematite microspheres produced by hydrothermal synthesis. It has been demonstrated that the thicker the metal layer the higher the microrobots speed. However, when employed for the degradation of nitroaromatic explosives pollutants through the photo-Fenton mechanism, higher rate of H2O2 consumption leads to higher propulsion speed of microrobots and lower pollutants degradation efficiencies owing to less H2O2 involved in the photo-Fenton reaction. This work presents new insights into the motion behavior of light-powered Janus micromotors and demonstrates that high speed is not what really matters for water purification via photo-Fenton reaction, which is important for the future environmental applications of micromachines.

Název v anglickém jazyce

Photo-Fenton Degradation of Nitroaromatic Explosives by Light-Powered Hematite Microrobots: When Higher Speed Is Not What We Go For

Popis výsledku anglicky

Self-powered micromachines are considered a ground-breaking technology for environmental remediation. Light-powered Janus microrobots based on photocatalytic semiconductors asymmetrically covered with metals have recently received great interest as they can exploit light to move and contemporarily degrade pollutants in water. Although various metals have been explored and compared to design Janus microrobots, the influence of the metal layer thickness on motion behavior and photocatalytic properties of microrobots have not been investigated yet. Here, light-driven hematite/Pt Janus microrobots are reported and fabricated by depositing Pt layers with different thickness on hematite microspheres produced by hydrothermal synthesis. It has been demonstrated that the thicker the metal layer the higher the microrobots speed. However, when employed for the degradation of nitroaromatic explosives pollutants through the photo-Fenton mechanism, higher rate of H2O2 consumption leads to higher propulsion speed of microrobots and lower pollutants degradation efficiencies owing to less H2O2 involved in the photo-Fenton reaction. This work presents new insights into the motion behavior of light-powered Janus micromotors and demonstrates that high speed is not what really matters for water purification via photo-Fenton reaction, which is important for the future environmental applications of micromachines.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Small Methods

ISSN

2366-9608

e-ISSN

—

Svazek periodika

5

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

2100617

Kód UT WoS článku

000691904600001

EID výsledku v databázi Scopus

2-s2.0-85114042055