期刊
JOURNAL OF MATERIALS SCIENCE
卷 56, 期 1, 页码 913-926出版社
SPRINGER
DOI: 10.1007/s10853-020-05299-7
关键词
-
资金
- National Natural Science Foundation of China [51403140, 51573109]
- State Key Lab of Polymer Material Engineering Foundation [sklpme 2015-2-01, 2016-3-02]
The study developed PVA/SA hydrogel beads using FeCl(3) and boric acid as cross-linking agents, exhibiting porous structure, excellent stability, and efficient photocatalytic performance under visible-light irradiation. The beads showed high removal rate (90.5%) of tetracycline and could easily be separated and recycled in water purification.
Developing a reusable and durable catalyst for heterogeneous photo-Fenton process is of great importance for the practical application in the environment remediation. In this study, poly(vinyl alcohol) (PVA)/sodium alginate (SA) hydrogel beads were constructed using FeCl(3)and boric acid as cross-linking agents. Characterizations and tests were employed to investigate the structure, optical property and durability of the obtained beads. The photo-Fenton performance of the PVA/SA-FeCl(3)beads was evaluated by degradation of tetracycline (TC) under visible-light irradiation. The results show that the constructed beads exhibit porous structure, display a broad absorption band in the visible region and behave excellent stability against mechanic effects. The photocatalytic experiment result indicates that the removal rate of TC reaches 90.5% under optimized conditions, while the removal rate of total organic carbon reaches 28.6%. By analyzing the degradation of TC after adding active species scavengers, a photocatalytic mechanism was proposed. Moreover, PVA/SA-6% FeCl(3)beads could be easily separated and recycled in water purification. This work provides a facile and robust method to construct reusable and durable Fe(III)-containing hydrogel beads with acceptable photo-Fenton catalytic performance under visible-light irradiation, paving the way for its practical application in wastewater treatment.
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