Facile synthesis of ZIF-8 incorporated electrospun PAN/PEI nanofibrous composite membrane for efficient Cr(VI) adsorption from water

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F23%3A00570051" target="_blank" >RIV/61389013:_____/23:00570051 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/23:PU148310

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1385894723007039?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1385894723007039?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2023.141972" target="_blank" >10.1016/j.cej.2023.141972</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Facile synthesis of ZIF-8 incorporated electrospun PAN/PEI nanofibrous composite membrane for efficient Cr(VI) adsorption from water

Popis výsledku v původním jazyce

Hexavalent chromium Cr(VI) is one of the most toxic heavy metal ions. Therefore, the removal of this contaminant from wastewater is of particular importance. Herein, a novel zeolitic imidazolate framework (ZIF-8) nanoparticles based electrospun polyacrylonitrile (PAN)/polyethylenimine (PEI) nanofibrous composite membranes (NCMs) were prepared and characterized by SEM, XRD, FTIR, TGA and other characterization techniques. The NCMs were tested for the adsorption of Cr(VI) from water. Results showed that the inclusion of PEI tailored the surface of the NCM to be superhydrophilic. The prepared electrospun NCM showed a high adsorption capacity for Cr(VI) (up to 403.5 mg·g−1) under ZIF-8 concentration of 5 wt%. More importantly, introducing ZIF-8 up to 5 % did not only increase the adsorption capacity but also enhanced the thermal stability, mechanical strength, and structure of the NCM. The experimental analysis of co-existing ions and the reusability of up to ten cycles showed that the optimized PAN/PEI@ZIF-8 NCM exhibited good selectivity and excellent stability for wastewater treatment. The adsorption kinetics followed the pseudo-second-order model and the adsorption isotherm could be fitted well by the Langmuir model. Thermodynamics revealed that the adsorption process was spontaneous and endothermic. The adsorption mechanism was found to be mainly electrostatic attraction and reduction. This study demonstrated the potential of ZIF-8-incorporated PAN/PEI NCMs for the removal of Cr(VI) from water.

Název v anglickém jazyce

Facile synthesis of ZIF-8 incorporated electrospun PAN/PEI nanofibrous composite membrane for efficient Cr(VI) adsorption from water

Popis výsledku anglicky

Hexavalent chromium Cr(VI) is one of the most toxic heavy metal ions. Therefore, the removal of this contaminant from wastewater is of particular importance. Herein, a novel zeolitic imidazolate framework (ZIF-8) nanoparticles based electrospun polyacrylonitrile (PAN)/polyethylenimine (PEI) nanofibrous composite membranes (NCMs) were prepared and characterized by SEM, XRD, FTIR, TGA and other characterization techniques. The NCMs were tested for the adsorption of Cr(VI) from water. Results showed that the inclusion of PEI tailored the surface of the NCM to be superhydrophilic. The prepared electrospun NCM showed a high adsorption capacity for Cr(VI) (up to 403.5 mg·g−1) under ZIF-8 concentration of 5 wt%. More importantly, introducing ZIF-8 up to 5 % did not only increase the adsorption capacity but also enhanced the thermal stability, mechanical strength, and structure of the NCM. The experimental analysis of co-existing ions and the reusability of up to ten cycles showed that the optimized PAN/PEI@ZIF-8 NCM exhibited good selectivity and excellent stability for wastewater treatment. The adsorption kinetics followed the pseudo-second-order model and the adsorption isotherm could be fitted well by the Langmuir model. Thermodynamics revealed that the adsorption process was spontaneous and endothermic. The adsorption mechanism was found to be mainly electrostatic attraction and reduction. This study demonstrated the potential of ZIF-8-incorporated PAN/PEI NCMs for the removal of Cr(VI) from water.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

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

461

Číslo periodika v rámci svazku

1 April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

141972

Kód UT WoS článku

000948817700001

EID výsledku v databázi Scopus

2-s2.0-85148770579