scholarly journals MODIFICATION OF TITANIUM DIOXIDE NANOMATERIALS BY SULFUR FOR PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE EVEN UNDER VISIBLE LIGHT

2018 ◽  
Vol 54 (2A) ◽  
pp. 164
Author(s):  
Nguyen Tan Lam
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Sodium Sulfate ◽  
High Photocatalytic Activity ◽  
Doped Titanium Dioxide ◽  
Modification Of Titanium ◽  
Very High

This paper presents a study on preparation of sulfur doped titanium dioxide using potassium fluorotitanate and sodium sulfate as precursors. The obtained results indicated that the doped TiO2 exhibited very high photocatalytic activity for degradation of methylene blue even under visible light. The increasing in the added sulfur amounts led to significantly increase in the degradation of methylene blue. When the S/TiO2 mole ratios increased from 10 to 25%, the degradation of methylene blue under compact light increased from 30.87% to 67.06%, respectively.

scholarly journals One-step electrosynthesis of visible light responsive double-walled alloy titanium dioxide nanotube arrays for use in photocatalytic degradation of dibutyl phthalate

RSC Advances ◽  
2020 ◽  
Vol 10 (36) ◽  
pp. 21238-21247 ◽  
Author(s):  
Yuan Wang ◽  
Xueke Zhang ◽  
Suzhen You ◽  
Yun Hu
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Active Sites ◽  
Dibutyl Phthalate ◽  
Nanotube Arrays ◽  
One Step ◽  
Titanium Dioxide Nanotube Arrays ◽  
Alloy Titanium

The double-walled alloy titanium dioxide nanotube arrays (DW-ATNTAs) with special porous inner walls exhibit superior photocatalytic activity under visible light for rich porous inner wall provided sufficient vacancy for adsorption and active sites.

Preparation of Graphene and γ-Fe2O3 Doped Titanium Dioxide and its Photocatalytic Properties

2013 ◽  
Vol 295-298 ◽  
pp. 447-451 ◽  
Author(s):  
De Qiang Chen ◽  
Yang Li ◽  
Yi Qun Chen
Keyword(s):  
Methylene Blue ◽  
Titanium Dioxide ◽  
Visible Light ◽  
Degradation Rate ◽  
Absorption Rate ◽  
Methylene Blue Degradation ◽  
Nano Powder ◽  
Doped Titanium Dioxide ◽  
Recycle Rate ◽  
Nano Titanium Dioxide

In this paper graphene is used to improve absorption rate of nano-titanium dioxide under visible light, meanwhile titanium dioxide is doped with superparamagnetism nano-powder of γ-Fe2O3 to modify the recovery of the photocatalyst. Gradually the increasing content of grapheme promotes the removal efficiency and correspondingly. Excitation condition is reduced and the photocatalysis property under visible light is improved and recycle rate of the titanium dioxide is effective promoted after the dispose. The effect of photocatalytic degradation of methylene blue is used to evaluate the photocatalytic activity. The methylene blue degradation rate raised from 53.4% to 85.9% with the increasing graphene load from 5% to 20% under visible light. The degradation efficiency of methylene blue decreased to 15% without the graphene load. The recovery rate of the photocatalyst can achieve 95% above. Graphene oxide works as the electron acceptor and photosensitizer to efficiently enhance the dye photodecomposition.

Preparation of Bi/Bi2MoO6 Plasmonic Photocatalyst with High Photocatalytic Activity Under Visible Light Irradiation

NANO ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. 1850127 ◽  
Author(s):  
Chentao Zou ◽  
Zhiyuan Yang ◽  
Mengjun Liang ◽  
Yunpeng He ◽  
Yun Yang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rate Constant ◽  
Active Species ◽  
High Photocatalytic Activity ◽  
Composite Photocatalysts ◽  
Degradation Rate Constant ◽  
Degradation Activity ◽  
Spr Effect

Bi metal deposited on Bi2MoO6 composite photocatalysts have been successfully synthesized via a simple reduction method at room temperature with using NaBH4 as the reducing agent. The photocatalytic activity of the composite was evaluated by degradation of rhodamine B (RhB) and bisphenol A (BPA) solution under visible light. The rate constant of Bi/Bi2MoO6 composite to RhB is 10.8 times that of Bi2MoO6, and the degradation rate constant of BPA is 6.9 times of that of Bi2MoO6. Nitrogen absorption–desorption isotherm proved that the increase of specific surface area is one of the reasons for the improvement of photocatalytic degradation activity of Bi/Bi2MoO6 composites. The higher charge transfer efficiency of Bi/Bi2MoO6 is found through the characterization of the photocurrent and impedance, which are attributed to the surface plasmon resonance (SPR) effect produced by the introduction of the metal Bi monomer in the composite. Free radical capture experiments proved that cavitation is the main active species. Based on the above conclusions, a possible mechanism of photocatalytic degradation is proposed.

Photocatalytic degradation of a model textile dye using Carbon-doped titanium dioxide and visible light

2017 ◽  
Vol 20 ◽  
pp. 71-77 ◽  
Author(s):  
Giuseppe Cinelli ◽  
Francesca Cuomo ◽  
Luigi Ambrosone ◽  
Matilde Colella ◽  
Andrea Ceglie ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Textile Dye ◽  
Carbon Doped ◽  
Doped Titanium Dioxide
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