期刊
RSC ADVANCES
卷 10, 期 60, 页码 36349-36362出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra06864k
关键词
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资金
- Key-Area Research and Development Program of Guangdong Province, China [2019B110205003]
- National Natural Science Foundation of China [51750110514]
- Science and Technology Planning Project of Guangdong Province, China [809130915092]
- Shantou University Scienti.c Research Foundation for Talents [NTF16015]
A visible light responsive TiO2/Ag3PO4(10 : 1) nanocomposite was prepared and successfully immobilized (12 wt%) in a spherical polymeric matrix consisting of polysulfone and alginate (10 : 6). The resulted beads featured a sponge-like structure with interconnected macrovoids and micropores, and showed high adsorption and visible-light photocatalytic activity towards various wastewater pollutants, including the widely used dye - methylene blue (k= 0.0321 min(-1)), and two emerging pharmaceutical contaminants - diclofenac (k= 0.018 min(-1)) and triclosan (k= 0.052 min(-1)). As determined, the degrees OH radical and h(+)are the primary reactive oxygen species responsible for the photodegradation. The composite photocatalytic beads are also effective in bacterial inactivation and degradation of acyl-homoserine lactones (AHLs), the bacterial quorum sensing autoinducers triggering biofilms, thus exhibiting a promising future in wastewater disinfection and biofilm retardation. Additionally, these beads could be used in inter-switchable suspended or buoyant forms, and be effectively regenerated by H(2)O(2)treatment, and used for multiple cycles without any significant loss in photoactivity. With these unique features, the prepared visible-light photocatalytic beads could be easily applied in large-scale water and wastewater treatment systems.
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