Polymer-derived SiC and SiOC aerogels have been synthesized and characterized both from the microstructural point of view and as sorbent materials for removing organic dyes (Methylene Blue, MB, and Rhodamine B, RB) from water solutions. Their adsorbent behavior has been compared with a polymer-derived SiC foam and a commercial mesoporous silica. The aerogels can efficiently remove MB and RB from water solution and their capacity is higher compared to the SiC foams due to the higher surface area. The SiOC aerogel remains monolithic after the water treatment (allowing for an easy removal without the need of a filtration step) and its maximum capacity for removing MB is 42.2 mg/g, which is higher compared to the studied mesoporous silica and many C-based porous adsorbents reported in the literature. The reason for this high adsorption capacity has been related to the unique structure of the polymer-derived SiOC, which consists of an amorphous silicon oxycarbide network and a free carbon phase.

Polymer-derived ceramic aerogels as sorbent materials for the removal of organic dyes from aqueous solutions

Bruzzoniti, Maria C.;Appendini, Marta;Rivoira, Luca;
2018-01-01

Abstract

Polymer-derived SiC and SiOC aerogels have been synthesized and characterized both from the microstructural point of view and as sorbent materials for removing organic dyes (Methylene Blue, MB, and Rhodamine B, RB) from water solutions. Their adsorbent behavior has been compared with a polymer-derived SiC foam and a commercial mesoporous silica. The aerogels can efficiently remove MB and RB from water solution and their capacity is higher compared to the SiC foams due to the higher surface area. The SiOC aerogel remains monolithic after the water treatment (allowing for an easy removal without the need of a filtration step) and its maximum capacity for removing MB is 42.2 mg/g, which is higher compared to the studied mesoporous silica and many C-based porous adsorbents reported in the literature. The reason for this high adsorption capacity has been related to the unique structure of the polymer-derived SiOC, which consists of an amorphous silicon oxycarbide network and a free carbon phase.
2018
101
2
821
830
http://www.blackwellpublishing.com/aims.asp?ref=0002-7820
adsorption; aerogels; organic dyes; polymer-derived ceramics; Ceramics and Composites; Materials Chemistry
Bruzzoniti, Maria C.; Appendini, Marta; Rivoira, Luca; Onida, Barbara; Del Bubba, Massimo; Jana, Prasanta; Sorarã¹, Gian Domenico
File in questo prodotto:
File Dimensione Formato  
198-Bruzzoniti_et_al-2018-Journal_of_the_American_Ceramic_Society.pdf

Accesso riservato

Descrizione: PDF Editoriale
Tipo di file: PDF EDITORIALE
Dimensione 912.5 kB
Formato Adobe PDF
912.5 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
4Aperto_Bruzzoniti.pdf

Open Access dal 28/09/2018

Descrizione: Articolo per open access
Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 1.29 MB
Formato Adobe PDF
1.29 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1657853
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 49
  • ???jsp.display-item.citation.isi??? 46
social impact