Polyacrylamide hydrogel-based nanocomposites containing graphene, kaolin or laponite: physico-mechanical characterization and adsorption properties.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F23%3A00565551" target="_blank" >RIV/67985858:_____/23:00565551 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0337072" target="_blank" >https://hdl.handle.net/11104/0337072</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mtcomm.2022.105150" target="_blank" >10.1016/j.mtcomm.2022.105150</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polyacrylamide hydrogel-based nanocomposites containing graphene, kaolin or laponite: physico-mechanical characterization and adsorption properties.

Popis výsledku v původním jazyce

Polyacrylamide (PAAm) hydrogel-based nanocomposites containing graphene, kaolin or laponite were prepared and tested as possible adsorbents for organic dyes. The morphology of basic hydrogels was controlled by varying the content of water in the reaction mixture and the composition of final adsorbents was modified by changing the type and amount of the additive. The impact of hydrogel morphology and applied additives on the physico-mechanical properties of prepared nanocomposites was investigated. Concerning morphology, the higher water content (i.e. larger pores) brings about the less rigid hydrogel or nanocomposite. Concerning additives, the addition of graphene or kaolin makes the nanocomposites less rigid, whereas the addition of laponite more rigid than the original PAAm hydrogels. The prepared kaolin and laponite nanocomposites swell in water less than the original hydrogels, the graphene nanocomposites do not exhibit an obvious trend. Both, the hydrogels and all their nanocomposites, swell more in aqueous NaCl solutions than in water. The adsorption properties of prepared nanocomposites toward six organic dyes was then systematically studied. Comparing to the original hydrogels, the adsorption capacity of nanocomposites varies with the type of additive: notably increases for laponite, slightly increases for graphene, and surprisingly decreases for kaolin nanocomposites. Concerning hydrogel morphology, the medium size of pores seems to be the most advantageous. The laponite nanocomposites are found to be efficient adsorbents for cationic dyes, especially those containing phenyl groups. In this case, the desorption of cationic dyes from the adsorbents can be efficiently done by using acid media.

Název v anglickém jazyce

Polyacrylamide hydrogel-based nanocomposites containing graphene, kaolin or laponite: physico-mechanical characterization and adsorption properties.

Popis výsledku anglicky

Polyacrylamide (PAAm) hydrogel-based nanocomposites containing graphene, kaolin or laponite were prepared and tested as possible adsorbents for organic dyes. The morphology of basic hydrogels was controlled by varying the content of water in the reaction mixture and the composition of final adsorbents was modified by changing the type and amount of the additive. The impact of hydrogel morphology and applied additives on the physico-mechanical properties of prepared nanocomposites was investigated. Concerning morphology, the higher water content (i.e. larger pores) brings about the less rigid hydrogel or nanocomposite. Concerning additives, the addition of graphene or kaolin makes the nanocomposites less rigid, whereas the addition of laponite more rigid than the original PAAm hydrogels. The prepared kaolin and laponite nanocomposites swell in water less than the original hydrogels, the graphene nanocomposites do not exhibit an obvious trend. Both, the hydrogels and all their nanocomposites, swell more in aqueous NaCl solutions than in water. The adsorption properties of prepared nanocomposites toward six organic dyes was then systematically studied. Comparing to the original hydrogels, the adsorption capacity of nanocomposites varies with the type of additive: notably increases for laponite, slightly increases for graphene, and surprisingly decreases for kaolin nanocomposites. Concerning hydrogel morphology, the medium size of pores seems to be the most advantageous. The laponite nanocomposites are found to be efficient adsorbents for cationic dyes, especially those containing phenyl groups. In this case, the desorption of cationic dyes from the adsorbents can be efficiently done by using acid media.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

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

Materials Today Communications

ISSN

2352-4928

e-ISSN

2352-4928

Svazek periodika

34

Číslo periodika v rámci svazku

March 2023

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

105150

Kód UT WoS článku

000991216400001

EID výsledku v databázi Scopus

2-s2.0-85144619825