title: Sustainable synthesis of metals-doped ZnO nanoparticles from zinc-bearing dust for photodegradation of phenol.
abstract: A novel strategy of waste-cleaning-waste is proposed in the present work. A metals-doped ZnO (M-ZnO, M = Fe, Mg, Ca and Al) nanomaterial has been prepared from a metallurgical zinc-containing solid waste "fabric filter dust" by combining sulfolysis and co-precipitation processes, and is found to be a favorable photocatalyst for photodegradation of organic substances in wastewater under visible light irradiation. All the zinc and dopants (Fe, Mg, Ca and Al) for preparing M-ZnO are recovered from the fabric filter dust, without any addition of chemical as elemental source. The dust-derived M-ZnO samples deliver single phase indexed as the hexagonal ZnO crystal, with controllable dopants species. The photocatalytic activity of the dust-derived M-ZnO samples is characterized by photodegradation of phenol aqueous solution under visible light irradiation, giving more prominent photocatalytic behaviors than undoped ZnO. Such enhancements may be attributed to incorporation of the dust-derived metal elements (Fe, Mg, Ca and Al) into ZnO structure, which lead to the modification of band gap and refinement of grain size. The results show a feasibility to utilize the industrial waste as a resource of photodegradating organic substances in wastewater treatments.
authors: Anhui Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Maanshan 243002, China. Electronic address: wzjof@hotmail.com.
authors: Zhao-Jin
authors: ZJ
authors: Wu
authors: Anhui Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Maanshan 243002, China.
authors: Wei
authors: W
authors: Huang
authors: Anhui Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Maanshan 243002, China.
authors: Ke-Ke
authors: KK
authors: Cui
authors: Anhui Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Maanshan 243002, China.
authors: Zhi-Fang
authors: ZF
authors: Gao
authors: Anhui Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Maanshan 243002, China.
authors: Ping
authors: P
authors: Wang
mesh_terms: D004391:Dust; D007220:Industrial Waste; D053768:Metal Nanoparticles / Q000737:chemistry*; D008669:Metallurgy; D008670:Metals / Q000737:chemistry*; D019800:Phenol / Q000737:chemistry*; D010782:Photolysis; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D004391:Dust; D007220:Industrial Waste; D008670:Metals; D014874:Water Pollutants, Chemical; D019800:Phenol; D015034:Zinc Oxide
keywords: Doped ZnO; Phenol; Photodegradation; Recycling; Zinc-bearing dust