3D graphene aerogels-supported Ag and Ag@Ag3PO4 heterostructure for the efficient adsorption-photocatalysis capture of different dye pollutants in water

Journal Article · Sat Sep 15 04:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.05.013· OSTI ID:22805202

Chen, Fenghua; Li, Shuangshuang; Chen, Qingtao; Zheng, Xianjun ^[1]; Liu, Porun ^[2]; Fang, Shaoming ^[1]

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1. College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, Henan (China)
2. Centre for Clean Environment and Energy Environment Futures Research Institute, Gold Coast Campus, Griffith University, Queensland, 4222 (Australia)

Highlights: • 3D graphene aerogels-supported Ag and Ag@Ag3PO4 heterostructure are synthesized. • The composite is effective in adsorption-photocatalysis cationic and anionic dyes. • The apparent adsorption-photocatalysis removal sequence is NR > RhB > MB > MO. • The contributions of adsorption and photocatalysis is different for different dyes. • The composite exhibits the highest catalytic activities with excellent stability. - Abstract: In this paper, we successfully synthesized 3D graphene aerogels-supported Ag and Ag@Ag{sub 3}PO{sub 4} heterostructure (3D Ag/Ag@Ag{sub 3}PO{sub 4}/GA) by the hetero-growth of Ag{sub 3}PO{sub 4} on partly Ag nanoparticles in macroporous 3D graphene aerogels (3D GA), aiming for the efficient adsorption-photocatalysis capture of both cationic (RhB, MB, and NR) and anionic (MO) dyes from aqueous solutions. For the removal of different dyes, the contributions of adsorption and photocatalysis is different and the apparent removal sequence is NR > RhB > MB > MO on the prepared 3D Ag/Ag@Ag{sub 3}PO{sub 4}/GA. Compared with bare Ag{sub 3}PO{sub 4} particles, Ag{sub 3}PO{sub 4}/GO, and Ag/Ag@Ag{sub 3}PO{sub 4}/GO, the prepared 3D Ag/Ag@Ag{sub 3}PO{sub 4}/GA exhibits the highest catalytic activities for the visible light degradation of RhB and MO. The possible mechanism for improved photocatalytic degradation of dyes by the 3D Ag/Ag@Ag{sub 3}PO{sub 4}/GA is proposed based on the active species trapping experiments. Moreover, the good stability and convenient recycling of the prepared 3D Ag/Ag@Ag{sub 3}PO{sub 4}/GA composite further make it have potential application prospect in eliminating organic contaminants.

• OSTI ID: 22805202
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 105; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
AQUEOUS SOLUTIONS
DYES
GELS
GRAPHENE
PHOTOCATALYSIS
POLLUTANTS
SILVER
SILVER PHOSPHATES
SYNTHESIS
WATER POLLUTION