Synthesis of Fe-doped TiO2 nanotubes by hydrothermal method for photodegradation of methylene blue from aqueous solutions

2021 ◽  
Vol 11 (1) ◽  
pp. 30-37
Author(s):  
Hung Nguyen Van ◽  
Nhi Tran Thi Yen ◽  
Nghi Nguyen Huu ◽  
Nguyet Bui Thi Minh
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Tio2 Nanotubes ◽  
Kinetic Studies ◽  
Ferric Nitrate ◽  
Hydroxyl Groups ◽  
Doped Tio2 ◽  
Molar Ratios ◽  
Surface Areas

Fe-doped TiO2 nanotubes were prepared by hydrothermal method using ferric nitrate and commercial TiO2 powder. The obtained materials were characterized by means of XRD, TEM, BET, FT-IR and UV-Vis-DRS. The photocatalytic activity was evaluated based on photodegradation of methylene blue under visible light irradiation. The results show that Fe3+ ions might incorporate into the lattice of TiO2 nanotubes. Fe-doped TiO2 materials showed narrower band gap energies, higher specific surface areas, more hydroxyl groups on the surface and significantly improved photocatalytic activity. The optimum Fe doping at the molar ratios of Fe/Ti = 0.5% showed the highest photocatalytic activity and was 3.08 times higher than that of undoped TiO2. The kinetic studies showed the decomposition of MB followed pseudo first-order kinetics with the rate constant were determined kapp = 5.64×10-2 min−1.

scholarly journals Real roles of perylene diimides for improving photocatalytic activity

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23024-23037 ◽  
Author(s):  
Fengxia Zhang ◽  
Wenjing Li ◽  
Tianyi Jiang ◽  
Xuemei Li ◽  
Yuanyuan Shao ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Perylene Diimides ◽  
Photodegradation Rate ◽  
Composite Photocatalysts ◽  
Visible Light Driven

Three novel visible-light-driven composite photocatalysts were synthesized by hydrothermal method. The effects of introducing PDIs with different structures into TiO2 were evaluated by assaying the photodegradation rate of methylene blue.

Preparation, characterization and photocatalytic activity of the neodymium-doped TiO2 nanotubes

2009 ◽  
Vol 255 (20) ◽  
pp. 8624-8628 ◽  
Author(s):  
Yue-Hua Xu ◽  
Chao Chen ◽  
Xue-Ling Yang ◽  
Xin Li ◽  
Bing-Feng Wang
Keyword(s):  
Photocatalytic Activity ◽  
Tio2 Nanotubes ◽  
Doped Tio2

ZnO Photocatalysts Modified with Eu2O3 and Sm2O3

2020 ◽  
Vol 850 ◽  
pp. 35-40
Author(s):  
Pāvels Rodionovs ◽  
Jānis Grabis
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
High Photocatalytic Activity ◽  
Solar Light ◽  
Effect Of Ph ◽  
Microwave Assisted ◽  
Bet Analysis

In this study ZnO photocatalysts with different loading of Eu2O3 and Sm2O3 were prepared vie microwave-assisted hydrothermal method. The prepared samples were investigated by using XRD, SEM and BET analysis. The photocatalytic activity was determined by degradation of methylene blue (MB) under Osram Vitalux illumination. Prepared ZnO photocatalysts shown high photocatalytic activity under solar light simulated radiation. After 30 minute of irradiation more than 95 % of initial MB solution was degraded. The effect of pH and photocatalyst dosage was investigated. The reusability of photocatalysts was also studied.

Effect of Iron (III)-Doping on the Photocatalytic Activity of Titanium Dioxide Catalysts for Methylene Blue Degradation

2011 ◽  
Vol 117-119 ◽  
pp. 1088-1091
Author(s):  
Wen Churng Lin ◽  
Rui Liu ◽  
Wein Duo Yang
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Specific Surface ◽  
Effective Means ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Surface Areas ◽  
Bet Specific Surface Area ◽  
Vis Spectroscopy

Iron-doped TiO2 photocatalyst powders were prepared by the sol–gel method and characterized by Brunauer–Emmett–Teller (BET)-specific surface area, scanning electron microscopy (SEM), X-ray diffraction (XRD), and Ultraviolet–Visible (UV-Vis) spectroscopy. Fe3+ doping in the TiO2 decreases the crystal grain size, increases the specific surface areas of powders, extends the absorption to visible light regions (400~500 nm), and lowers the photocatalytic activity for methylene blue (MB) degradation under UV irradiation. The photocatalytic degradation of MB in water was investigated as a function of the Fe3+ content in TiO2. It was found that under the irradiation of visible light, a small amount of Fe3+ dopant in TiO22 powders could obviously enhance the photocatalytic activity. When the Fe3+ content was in the range of 0.03–0.1 mol%, the photocatalytic activity of the samples was higher than that of undoped TiO2. Appropriate content of Fe-doping is an effective means to improve the photocatalytic activity of TiO2 for MB degradation under visible light irradiation.

Fabrication of an olive-like BiVO4 hierarchical architecture with enhanced visible-light photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30115-30124 ◽  
Author(s):  
Bin Wang ◽  
Lingju Guo ◽  
Tao He
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Hierarchical Architecture ◽  
Visible Light Photocatalytic Activity ◽  
Template Free ◽  
Visible Light Photocatalytic

The olive-like BiVO4 hierarchical architecture can be synthesized by a facile, template-free hydrothermal method, which shows high visible-light photocatalytic activity for degradation of methylene blue molecules.

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