Synergistic Effect on Photocatalytic Activity of Co-Doped NiTiO3/g-C3N4 Composites under Visible Light Irradiation

被引:13
作者
Dao, Duc Quang [1 ]
Nguyen, Thi Kim Anh [1 ]
Pham, Thanh-Truc [2 ]
Shin, Eun Woo [1 ]
机构
[1] Univ Ulsan, Sch Chem Engn, Daehakro 93, Ulsan 44610, South Korea
[2] HCMC Univ Technol & Educ HCMUTE, Fac Appl Sci, Mat Technol Dept, 1 Vo Van Ngan St, Ho Chi Minh City 700000, Vietnam
基金
新加坡国家研究基金会;
关键词
NiTiO3; g-C3N4; composite photocatalyst; recombination; photodegradation; charge separation efficiency; PERFORMANCE; TEMPERATURE; WATER; IRON;
D O I
10.3390/catal10111332
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Co-doped NiTiO3/g-C3N4 composite photocatalysts were prepared by a modified Pechini method to improve their photocatalytic activity toward methylene blue photodegradation under visible light irradiation. The combination of Co-doped NiTiO3 and g-C3N4 and Co-doping into the NiTiO3 lattice synergistically enhanced the photocatalytic performance of the composite photocatalysts. X-ray photoelectron spectroscopy results for the Co-doped NiTiO3/g-C3N4 composite photocatalysts confirmed Ti-N linkages between the Co-doped NiTiO3 and g-C3N4. In addition, characteristic X-ray diffraction peaks for the NiTiO3 lattice structure clearly indicated substitution of Co into the NiTiO3 lattice structure. The composite structure and Co-doping of the C-x composite photocatalysts (x wt % Co-doped NiTiO3/g-C3N4) not only decreased the emission intensity of the photoluminescence spectra but also the semicircle radius of the Nyquist plot in electrochemical impedance spectroscopy, giving the highest k(app) value (7.15 x 10(-3) min(-1)) for the C-1 composite photocatalyst.
引用
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页码:1 / 11
页数:11
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