Facile fabrication of highly catalytic-active Ag2CO3/AgBr/graphene oxide ternary composites towards the photocatalytic wastewater treatment

Si, Mingzhi1; Wang, Wenguang1,2; Guan, Qifang1; Zhang, Haiyan1,2; Puttaswamy, Madhusudan3

2020-09-15

10.1007/s11356-020-10740-0

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH   影响因子和分区

0944-1344

1614-7499

Ag2CO3/AgBr/graphene oxide (Ag2CO3/AgBr/GO) ternary composites with different percentages of GO were fabricated by a facile co-precipitation strategy. The composites were characterized in the aspect of phase composition, light absorption performance, and micromorphology etc. The activity of the composites was studied by photocatalytic degradation of colored organic dye (rhodamine B, RhB) and colorless organics (phenol) under the shine of visible light. The optimized Ag2CO3/AgBr/GO-7.5 composites revealed the most excellent photocatalytic activity, which exhibited an apparent reaction rate constant exceeding that of pristine AgBr and Ag(2)CO(3)by a factor of 107 and 5.63, respectively. The outstanding performance can be attributed to the effective separation of electrons and holes as well as the strong light absorption ability resulting from the Ag2CO3/AgBr/GO heterostructure. Moreover, it was verified that h(+)and center dot O(2)(-)were two major active substances responsible for the decomposition of organic pollutants according to the free radical-trapping experiments. Besides, a probable reaction mechanism referring to the charge transfer and separation in the composites was proposed and discussed in detail.

Ag2CO3 Graphene Ternary composites Photocatalysis Free radicals

SCI

英语

其他

Guangzhou Science and Technology Project[201904010131] ; National Natural Science Foundation of China[51302043] ; National Natural Science Foundation of China-Guangdong Joint Fund[U1401246] ; Science and Technology Program of Guangdong Province of China[2017B050504004][2015B010135011]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000570182500006

SPRINGER HEIDELBERG

ENVIRONMENT/ECOLOGY

Web of Science

1.Guangdong Univ Technol, Sch Mat & Energy, Guangzhou Higher Educ Mega Ctr 100, Guangzhou 510006, Peoples R China
2.Guangdong Prov Key Lab Funct Soft Condensed Matte, Guangzhou 510006, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen, Peoples R China

Si, Mingzhi,Wang, Wenguang,Guan, Qifang,et al. Facile fabrication of highly catalytic-active Ag2CO3/AgBr/graphene oxide ternary composites towards the photocatalytic wastewater treatment[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2020,28(4).

Si, Mingzhi,Wang, Wenguang,Guan, Qifang,Zhang, Haiyan,&Puttaswamy, Madhusudan.(2020).Facile fabrication of highly catalytic-active Ag2CO3/AgBr/graphene oxide ternary composites towards the photocatalytic wastewater treatment.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,28(4).

Si, Mingzhi,et al."Facile fabrication of highly catalytic-active Ag2CO3/AgBr/graphene oxide ternary composites towards the photocatalytic wastewater treatment".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 28.4(2020).