Investigation of the Different Morphologies of Zinc Oxide (ZnO) in Cellulose/ZnO Hybrid Aerogel on the Photocatalytic Degradation Efficiency of Methyl Orange

Series of silicon-substituted hydroxyapatite were prepared and characterized, and their ability to degrade methyl orange and Congo red in aqueous solutions were studied. The effect of substituted silicon amount on the photocatalytic degradation efficiency of the dyes was investigated. The substitution of SiO44− groups for PO43− groups caused OH− loss and difference in the microstructure of hydroxyapatite, and the elimination rates of silicon-substituted hydroxyapatite decreased with the increasing of substituted silicon amount compared to that of pure hydroxyapatite.

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Porous ceramic foam loading titanium dioxide for photocatalytic degradation of the methyl orange solution

Multidiscipline Modeling in Materials and Structures ◽

10.1108/mmms-03-2019-0049 ◽

2019 ◽

Vol 15 (6) ◽

pp. 1366-1378

Author(s):

Y.J. Guo ◽

W. Cheng ◽

P.S. Liu

Keyword(s):

Titanium Dioxide ◽

Methyl Orange ◽

Photocatalytic Degradation ◽

Porous Ceramic ◽

Degradation Efficiency ◽

Ceramic Foam ◽

Raw Material ◽

Polymer Foam ◽

Content Type ◽

Wide Range

Purpose The purpose of this paper is to provide an investigation on a new kind of photocatalytic material, namely, the porous ceramic foam loading titanium dioxide, which can make an effective photocatalytic degradation of the methyl orange (MO) solution in the wastewater. Design/methodology/approach The natural zeolite powder has been used as the primary raw material to produce a sort of lightweight porous ceramic foam by impregnating polymer foam in slurry and then sintering. With the sol-gel method, a kind of open-cell reticular porous ceramic foam loading TiO2 film was obtained having a good photocatalytic action, and the resultant porous composite product presents the bulk density of 0.3~0.6 g/cm3 to be able to float on water. Findings The MO could tend to be completely degraded in the solution with a certain concentration by the TiO2-loaded ceramic foam irradiated with ultraviolet light, and this composite foam was found to have high degradation efficiency for the MO solution in a wide range of pH. Originality/value This work presents a TiO2-loaded ceramic foam that can effectively photo-catalyze to degrade the MO in water, and the degradation efficiency were examined under different conditions of the MO solution with various pH values.

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Study on the Preparation Process of Photocatalysts by the Acidolysis of High Titanium Slag with Hydrochloric Acid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.662.3 ◽

2014 ◽

Vol 662 ◽

pp. 3-6

Author(s):

Xue Fei Lei ◽

Chen Chen ◽

Xing Li ◽

Xiang Xin Xue ◽

He Yang

Keyword(s):

Reaction Time ◽

Methyl Orange ◽

Hydrochloric Acid ◽

Photocatalytic Degradation ◽

Methyl Orange Solution ◽

Degradation Efficiency ◽

Raw Material ◽

Photocatalytic Efficiency ◽

Titanium Slag ◽

Acid Sludge

The paper preliminary studied the photocatalytic efficiency of the filter residue of the acidolysis of high titanium slag (RAHTS) with hydrochloric acid, and explored the photocatalytic efficiency on the acid methyl orange solution under the mercury lamp irradiation. With RAHTS performing as a raw material to react with hydrochloric acid, and then the substance content, nature and catalytic efficiency of the filter residues were examined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and photocatalytic reaction apparatus. Through the experimental investigation, the photocatalytic degradation efficiency on the methyl orange of the filter residues increased with the acid-sludge ratio, reaction time, reaction temperature, and the concentration of hydrochloric acid. When the temperature was 100°C, the reaction time was 4 h, the concentration of the hydrochloric acid was 6 mol/L, the acid-sludge ratio was 1, the filter residues showed a best photocatalytic degradation efficiency. Under that experimental condition, the degradation rate was as high as 85.1%.

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Inspired Preparation of Zinc Oxide Nanocatalyst and the Photocatalytic Activity in the Treatment of Methyl Orange Dye and Paraquat Herbicide

International Journal of Photoenergy ◽

10.1155/2018/5094741 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 7

Author(s):

Ghaida H. Munshi ◽

Amal M. Ibrahim ◽

Laila M. Al-Harbi

Keyword(s):

Zinc Oxide ◽

Photocatalytic Activity ◽

Methyl Orange ◽

Photocatalytic Degradation ◽

Analytical Techniques ◽

Degradation Process ◽

Naturally Occurring ◽

Uv Lamp ◽

Degradation Of Methyl Orange

As the need to use green chemistry routes increases, environmentally friendly catalytic processes are a demand. One of the most important and abundant naturally occurring catalysts is chlorophyll. Chlorophyll is the first recognized catalyst; it is a reducing agent due to its electron-rich structure. The effects of spinach on the preparation of zinc oxide nanoparticles and the photocatalytic degradation of methyl orange and paraquat in sunlight and under a UV lamp and photocatalytic degradation in sunlight were studied. Different parameters of the catalytic preparation process and photocatalytic degradation process were studied. Characterization of differently prepared samples was carried out using different analytical techniques such as XRD, SEM, and EDX and finally the photocatalytic activity towards decomposition of methyl orange and paraquat.

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