一种新型石墨烯-粉煤灰基地质聚合物复合材料的制备及光催化应用<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.09.006

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Abstract Two-dimensional graphene with excellent theoretical electron mobility provides a theoretical foundation for the composite of graphene and fly ash geopolymer as well as the photo-generated electron transmission of semiconductor. The graphene fly-ash-based geopolymer composite was firstly synthesized and applied as photocatalyst for degradation of dye. XRD, FESEM, XPS and FT-IR results showed that the spherical fly ash particles reacted with alkali-activated agent to generate the graphene alkali-activated fly-ash-based geopolymer (GAFG) which was composed of Si-O-Si (Al) amorphous net structure, and the lamellate graphene was wrapped inside. The fact that the Co-10Fe₂O₃-GAFG sample displayed the highest photocatalytic activity for degradation of basic blue dye was ascribed to the synergistic effect of: the donor level of Fe₂O₃semiconductor induced by Co²⁺ doping, the rapid photoelectron transfer from Fe₂O₃ semiconductor to graphene, and the oxidative degradation of dye molecules by hydroxyl radicals. The photocatalytic degradation reaction coincides with the second-order reaction kinetics.

Key words： graphene fly-ash-based geopolymer composite photocatalysis hydroxyl radical dye degradation

Published: 10 May 2017 Online: 2018-05-03

CLC number:

TB33

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	Articles by authors
	ZHANG Yaojun
	YU Miao
	ZHANG Li
	ZHANG Yixin
	KANG Le

Cite this article:

ZHANG Yaojun,YU Miao,ZHANG Li, et al. Synthesis of a Novel Graphene Fly-ash-based Geopolymer Composite and Its Photocatalytic Application[J]. Materials Reports, 2017, 31(9): 50-56.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.09.006 OR https://www.mater-rep.com/EN/Y2017/V31/I9/50

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