Use of an optofluidic microreactor and Cu nanoparticles synthesized in ionic liquid and embedded in TiO<inf>2</inf> for an efficient photoreduction of CO<inf>2</inf> to methanol

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F21%3A00532038" target="_blank" >RIV/61388955:_____/21:00532038 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0310647" target="_blank" >http://hdl.handle.net/11104/0310647</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2020.126643" target="_blank" >10.1016/j.cej.2020.126643</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Use of an optofluidic microreactor and Cu nanoparticles synthesized in ionic liquid and embedded in TiO<inf>2</inf> for an efficient photoreduction of CO<inf>2</inf> to methanol

Popis výsledku v původním jazyce

The slow kinetics in the photocatalytic reduction of CO2, as well as the low quantum efficiencies achieved, directly related to the photocatalyst and reactor configuration applied, limit the widespread use of this technology. In light of this, the main objective of this work is to evaluate the continuous photocatalytic conversion of CO2 into methanol in an optofluidic microreactor (with enhanced mass transport, large volume/active area ratio and uniform light distribution) using Cu nanoparticles synthesized in the hydrophilic 3-methyl-n-butylimidazolium tetrafluoroborate (BMIm.BF4) ionic liquid and embedded in TiO2 (P25). The ionic liquid not only acts as a template to control the size of the nanoparticles but also as a stabilizing agent. The analysis includes the effect of structural parameters of the photoactive layer such as Cu content (from 0.8 to 6.8 wt%) and photocatalyst loading (0.5–3 mg·cm−2), as well as operating variables such as UV and visible light intensities (2.5–10 mW·cm−2) and cell configuration (i.e. one or two compartments). The maximum methanol yield reached from the continuous transformation of CO2 is r = 230.3 µmol∙g−1∙h−1 at 2 wt% Cu content, photocatalyst loading of 2 mg·cm−2, UV light intensity of 10 mW·cm−2 and a two-compartment microreactor configuration. This result outperforms the values previously reported for Cu/TiO2-based systems using optofluidic microreactors, as well as most of those in common CO2 photoreactors.

Název v anglickém jazyce

Use of an optofluidic microreactor and Cu nanoparticles synthesized in ionic liquid and embedded in TiO<inf>2</inf> for an efficient photoreduction of CO<inf>2</inf> to methanol

Popis výsledku anglicky

The slow kinetics in the photocatalytic reduction of CO2, as well as the low quantum efficiencies achieved, directly related to the photocatalyst and reactor configuration applied, limit the widespread use of this technology. In light of this, the main objective of this work is to evaluate the continuous photocatalytic conversion of CO2 into methanol in an optofluidic microreactor (with enhanced mass transport, large volume/active area ratio and uniform light distribution) using Cu nanoparticles synthesized in the hydrophilic 3-methyl-n-butylimidazolium tetrafluoroborate (BMIm.BF4) ionic liquid and embedded in TiO2 (P25). The ionic liquid not only acts as a template to control the size of the nanoparticles but also as a stabilizing agent. The analysis includes the effect of structural parameters of the photoactive layer such as Cu content (from 0.8 to 6.8 wt%) and photocatalyst loading (0.5–3 mg·cm−2), as well as operating variables such as UV and visible light intensities (2.5–10 mW·cm−2) and cell configuration (i.e. one or two compartments). The maximum methanol yield reached from the continuous transformation of CO2 is r = 230.3 µmol∙g−1∙h−1 at 2 wt% Cu content, photocatalyst loading of 2 mg·cm−2, UV light intensity of 10 mW·cm−2 and a two-compartment microreactor configuration. This result outperforms the values previously reported for Cu/TiO2-based systems using optofluidic microreactors, as well as most of those in common CO2 photoreactors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

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

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

1873-3212

Svazek periodika

404

Číslo periodika v rámci svazku

JAN 2021

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

126643

Kód UT WoS článku

000601348100006

EID výsledku v databázi Scopus

2-s2.0-85089425202