Artificial chloroplast-like phosphotungstic acid — iron oxide microbox heterojunctions penetrated by carbon nanotubes for solar photocatalytic degradation of tetracycline antibiotics in wastewater

Sun，Pengliang1,3; Zhou，Shuxing2; Yang，Yun1; Liu，Shixi1; Cao，Qiue1; Wang，Yuanhao3; Wågberg，Thomas4; Hu，Guangzhi1,4

2022

10.1007/s42114-022-00462-x

Advanced Composites and Hybrid Materials   影响因子和分区

2522-0128

2522-0136

Doping-inducted heterojunction is an effective strategy to boost the semiconductor photocatalysis. In this work, an artificial chloroplast-like HPW@FeO-CNTs photocatalyst was developed by a continuous hydrothermal process and microwave irradiation. This catalyst showed an excellent performance in degradation of biotoxic tetracycline (under mild conditions, tetracycline can be degraded by 100% in 100 min), the apparent rate constant of degradation was 5.5 times higher than that of pure FeO. This is attributed to the synergistic photocatalysis of the Keggin unit of phosphotungstic acid to FeO, which makes the photogenerated electrons trapped in the W5d vacancy state of the Keggin unit, thus delaying the recombination of electron–hole pairs. Moreover, the low-cost HPW@FeO-CNTs photocatalyst displayed a strong magnetism, leading to a facile separation of the photocatalyst. A relatively stable efficiency of degradation can be maintained. In the light radiation of “Baoxiang river” (Yunnan, China) water sample, the total organic carbon content decreased to 10.58%, which revealed a strong ability of organic carbon mineralization. In addition, E. coli as bacteria indicator was selected to quantitatively monitor the comprehensive toxicity changes in wastewater upon this photocatalytic technology. Both experimental and theoretical investigations demonstrated that the unique nano-scale biomimetic structures with high active sites, improvement of visible-light response, and separation and transfer of electrons and holes in heterojunction were responsible for the superior catalytic results. Graphical abstract: Artificial Chloroplast-like HPWO@FeO-CNTs photocatalyst has remarkable photocatalytic activity, which is attributed to the synergistic photocatalytic effect of Keggin unit of phosphotungstic acid on FeO, and the hybridization of Fe3d, O2p and W5d (forming Fe–O-W) leads to the improvement of visible light response and the rapid separation and transfer of electrons and holes. [Figure not available: see fulltext.]

Artificial chloroplast-like photocatalyst Heterojunction Microwave radiation Phosphotungstic acid Tetracycline

SCI ; EI

英语

通讯

National Key Research and Development Program of China[2019YFC1804400] ; National Natural Science Foundation of China[81860623] ; Yunnan University's Research Innovation Fund for Graduate Students[2020J21] ; Double First Class University Plan[C176220100042]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Composites

WOS:000782701800001

SPRINGERNATURE

20221611974076

Biomimetics ; Carbon nanotubes ; Electrons ; Hematite ; Light ; Microwave irradiation ; Organic carbon ; Photocatalytic activity ; Rate constants ; Semiconductor doping ; Separation

Biotechnology:461.8 ; Biology:461.9 ; Minerals:482.2 ; Electromagnetic Waves:711 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Organic Compounds:804.1 ; Crystalline Solids:933.1

2-s2.0-85128220585

Scopus

1.School of Chemical Science and Technology,Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education,Institute for Ecological Research and Pollution Control of Plateau Lakes,Yunnan University,Kunming,Yunnan,650504,China
2.Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices,Hubei University of Arts and Science,Xiangyang,Hubei,441053,China
3.SUSTech Engineering Innovation Center,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.Department of Physics,Umeå University,Umeå,S-901 87,Sweden

Sun，Pengliang,Zhou，Shuxing,Yang，Yun,等. Artificial chloroplast-like phosphotungstic acid — iron oxide microbox heterojunctions penetrated by carbon nanotubes for solar photocatalytic degradation of tetracycline antibiotics in wastewater[J]. Advanced Composites and Hybrid Materials,2022.

Sun，Pengliang.,Zhou，Shuxing.,Yang，Yun.,Liu，Shixi.,Cao，Qiue.,...&Hu，Guangzhi.(2022).Artificial chloroplast-like phosphotungstic acid — iron oxide microbox heterojunctions penetrated by carbon nanotubes for solar photocatalytic degradation of tetracycline antibiotics in wastewater.Advanced Composites and Hybrid Materials.

Sun，Pengliang,et al."Artificial chloroplast-like phosphotungstic acid — iron oxide microbox heterojunctions penetrated by carbon nanotubes for solar photocatalytic degradation of tetracycline antibiotics in wastewater".Advanced Composites and Hybrid Materials (2022).