Effect of Vanadium(IV)-Doping on the Visible Light-Induced Catalytic Activity of Titanium Dioxide Catalysts for Methylene Blue Degradation

A highly efficient and elaborately structured visible-light-driven catalyst composed of mesoporous TiO2 (MT) doped with Ag+-coated graphene (MT-Ag/GR) has been successfully fabricated by a sol–gel and solvothermal method.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.295-298.447 ◽

2013 ◽

Vol 295-298 ◽

pp. 447-451 ◽

Cited By ~ 1

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.

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Synthesis of TiO2/g-C3N4 material for visble light driven photocatalytic degradation of methylene blue

Vietnam Journal of Catalysis and Adsorption ◽

10.51316/jca.2020.044 ◽

2020 ◽

Vol 9 (3) ◽

pp. 21-26

Author(s):

Hoa Dang Thi Ngoc ◽

Tu Nguyen Thi Thanh

Keyword(s):

Methylene Blue ◽

Titanium Dioxide ◽

Visible Light ◽

Diffuse Reflectance Spectroscopy ◽

Pure Tio2 ◽

X Ray Diffraction ◽

Methylene Blue Degradation ◽

Light Region ◽

Visible Light Driven ◽

Kinetics Of

In this study, an efficient strategy for the synthesis of solvent titanium dioxide and titanium dioxide/graphitic carbon nitride (TiO2/g-C3N4) heterostructure photocatalyst was applied to fabricate a kind of visible-light-driven photocatalyst. The obtained samples were characterised by means of X-ray diffraction, infrared spectroscopy, ultraviolet–visible spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy and photoluminescence. The heterostructure shows higher absorption edge towards harvesting more solar energy compared with pure TiO2 and pure g-C3N4 respectively. The photocatalytic behaviour under visible light and kinetics of the TiO2/g-C3N4 catalyst via methylene blue degradation were addressed. The results showed that the introduction of solvent titanium dioxide into g-C3N4 enhanced the photocatalytic activity in the visible light region. TiO2/g-C3N4 is potential visible light driven photocatalyst for the organic substances degradation in aqueous solutions.

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Catalytic Activity of Ba Doped Ta2O5 for Methylene Blue Degradation under Visible Light

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.156-157.1440 ◽

2010 ◽

Vol 156-157 ◽

pp. 1440-1443

Author(s):

Yan Hong Zhao ◽

Min Sun ◽

Shu Wei Wang ◽

Wen Ming Tong ◽

Xiao Jing Wang

Keyword(s):

Methylene Blue ◽

Catalytic Activity ◽

Visible Light ◽

Tantalum Oxide ◽

X Ray Diffraction ◽

Methylene Blue Degradation ◽

X Ray ◽

First Order ◽

Good Crystallinity ◽

Kinetics Of

The Ba doped tantalum oxide (Ba-Ta2O5) particles were synthesized using low temperature hydrothermal method. The phase structure of samples was characterized by X-ray diffraction (XRD). The result showed that Ba-Ta2O5 had still good crystallinity and belonged to rhombic crystal. The catalytic activity of samples was investigated with the degradation methylene blue (MB) under visible light. The degradation efficiency attained 82% when the reaction time was 12 h. The kinetics of MB degradation was respect to the first-order.

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