title: The contribution of vanadium and titanium on improving methylene blue decolorization through heterogeneous UV-Fenton reaction catalyzed by their co-doped magnetite.
abstract: This study investigated the methylene blue (MB) decolorization through heterogeneous UV-Fenton reaction catalyzed by V-Ti co-doped magnetites, with emphasis on comparing the contribution of V and Ti cations on improving the adsorption and catalytic activity of magnetite. In the well crystallized spinel structure, both Ti(4+) and V(3+) occupied the octahedral sites. Ti(4+) showed a more obvious effect on increasing specific surface area and superficial hydroxyl amount than V(3+) did, resulting in a significant improvement of the adsorption ability of magnetite to MB. The UV introduction greatly accelerated MB degradation. And magnetite with more Ti and less V displayed better catalytic activity in MB degradation through heterogeneous UV-Fenton reaction. The transformation of degradation products and individual contribution from vanadium and titanium on improving adsorption and catalytic activity of magnetite were also investigated. These new insights are of high importance for well understanding the interface interaction between contaminants and metal doped magnetites, and the environmental application of natural and synthetic magnetites.
authors: Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors: Xiaoliang
authors: X
authors: Liang
authors: Yuanhong
authors: Y
authors: Zhong
authors: Sanyuan
authors: S
authors: Zhu
authors: Lingya
authors: L
authors: Ma
authors: Peng
authors: P
authors: Yuan
authors: Jianxi
authors: J
authors: Zhu
authors: Hongping
authors: H
authors: He
authors: Zheng
authors: Z
authors: Jiang
mesh_terms: D000327:Adsorption; D002384:Catalysis; D003116:Color; D003460:Crystallization; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014639:Vanadium / Q000737:chemistry*
chemical_list: D014639:Vanadium; D014025:Titanium; D008751:Methylene Blue; D052203:Ferrosoferric Oxide