期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 556, 期 -, 页码 366-375出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.08.072
关键词
g-C3N4 hybrid aerogel; Photodegradation; Organic pollutants
资金
- National Key Research and Development Program of China [2017YFD0600204]
- National Natural Science Foundation of China [31670592]
- Natural Science Funds for Distinguished Young Scholar of Heilongjiang Province [JQ2019C001]
- Central University Basic Scientific Research Project of China [2572017EB03]
Graphitic carbon nitride (g-C3N4) hybrid aerogels (GHAs) with different proportions of g-C3N4 were prepared using g-C3N4, carboxymethyl cellulose, and beta-cyclodextrin. GHAs have demonstrated high porosity, large specific surface area, rich three-dimensional network structure. GHAs demonstrated an excellent synergistic effect on the photocatalytic and adsorptive properties. Especially, GHA1 (the ratio of g-C3N4 and aerogel component was 1:1) exhibited a good synergy in photodegradation and adsorption, with a Rhodamine B (Rh B) removal up to 97.99% in 90 min. In five cycling experiments, the GHA1 showed a good long-term stability. The aerogels can be easily isolated and maintains its excellent photocatalytic properties. Compared to pure g-C3N4, GHA1 has a stronger photocurrent, which is due to the transmission of light to the surface of the catalyst, promoted photo-generated electron-hole pairs, and inhibited recombination of electros and holes. Finally, mechanistic studies reveal that the superoxide radicals (O-center dot(2-)) are the main active groups in the photocatalytic degradation process. This work provides a useful perspective in design and fabrication of hybrid aerogel composites with an enhanced photocatalytic activity. (C) 2019 Elsevier Inc. All rights reserved.
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