Cold spray (P, N, Mo)-TiO2 photocatalytic coatings: synthesis, microstructural characterization and photocatalytic properties

被引:3
作者
Shen, Yanfang [1 ]
Gyansah, L. [2 ]
Song, Wan [1 ]
Feng, Bo [1 ,3 ]
Wang, Jiqiang [1 ]
Cui, Xinyu [1 ]
Tao, Yongshan [1 ]
Xiong, Tianying [1 ]
机构
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
[2] Reg Maritime Univ, Marine Engn Dept, Accra, Ghana
[3] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
来源
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 09期
基金
中国国家自然科学基金;
关键词
cold spraying; spray drying; photocatalyst; coating; titanium dioxide; VISIBLE-LIGHT PHOTOCATALYSIS; DOPED TIO2; NITROGEN; CARBON; ANATASE; SEMICONDUCTOR; DEPOSITION; NANOTUBES; TITANIA;
D O I
10.1088/2053-1591/ab3028
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The (P, N, Mo)-TiO2 photocatalyst particles were intuitively synthesized using spray the sol-gel method followed by the spray drying method. Imperatively, the (P, N, Mo)-TiO2 photocatalyst coatings were deposited on aluminum substrate by cold spraying. The (P, N, Mo)-TiO2 powders were initially prepared by sol-gel method, which exhibited the characteristics of a polygonal particle with a primary particle size of 20 nm and a mean size of 2 mu m. The synthesized (P, N, Mo)-TiO2 powders were agglomerated into spherical particles with a mean size of 5 mu m by spray drying method. The agglomerated powders depicted a good flowability, wettability and were suitable for cold spray deposition. The successful (P, N, Mo)-TiO2 coatings exhibited good interfacial bonding with the substrate, with an average coating thickness of 15 mu m. The properties of the synthesized (P, N, Mo)-TiO2 powders and coatings were analyzed by advanced modern techniques, including XRD, XPS, UV-vis, SEM and TEM. The photocatalytic performance of (P, N, Mo)-TiO2 coatings were investigated under visible light. Cold sprayed (P, N, Mo)-TiO2 coatings exhibited excellent photocatalytic activity inMBdegradation under visible-light irradiation. The (P, N, Mo)-TiO2 coating sprayed at 500 degrees C revealed the highest photodegradation rate of 38% in 4 h. Complementarily, the doping mechanism and photocatalytic mechanism of (P, N, Mo)-TiO2 coatings were also effectively proposed and discussed.
引用
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页数:14
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