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

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.

PBA-loaded albite-base ceramic foam in application to adsorb harmful ions of Cd, Cs and As(V) in water

2019 ◽  
Vol 15 (3) ◽  
pp. 659-672
Author(s):  
J.H. Chen ◽  
P.S. Liu ◽  
W. Cheng
Keyword(s):  
Bulk Density ◽  
Metal Ion ◽  
Porous Ceramic ◽  
Ceramic Foam ◽  
Raw Material ◽  
Ion Concentration ◽  
Ceramic Surface ◽  
Polymer Foam ◽  
Content Type ◽  
Prussian Blue Analog

Purpose The purpose of this paper is to provide an investigation on a new kind of adsorbent materials, namely, the Prussian blue analog (PBA)-loaded albite-base porous ceramic foam, which can effectively adsorb the heavy metal ion in the wastewater. Design/methodology/approach The natural zeolite powder has been used as the primary raw material to make a sort of porous ceramic foam by impregnating polymer foam in slurry and then sintering. Adjusting the technological parameters could control the bulk density of the ceramic product, which could float on water with the bulk density less than 1 g/cm3 and also sink in water with the bulk density higher than 1 g/cm3. After desilicating the porous ceramic foam, an Al-Fe type PBA with a strong function of ion exchange was loaded on the ceramic surface by directly yielding. Findings The adsorption performance for harmful metal ions was greatly improved by combining together the high adsorption capability of the PB analog and the efficient high specific surface area of the porous ceramic foam. Originality/value This work presents a PBA-loaded albite-base porous ceramic foam that can effectively adsorb the harmful substance in water, and the adsorption efficiency for some typical harmful ions, i.e., Cd2+, Cs+ and As(V), was examined under different conditions of the experimental period, the pH value and the ion concentration in the tested solution.

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

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%.

scholarly journals Research on Photocatalytic Degradation of Methyl Orange by a β-Cyclodextrin/Titanium Dioxide Composite

2017 ◽  
Vol 3 (3) ◽  
pp. 164-169 ◽  
Author(s):  
Shuting Lu ◽  
Shuting Lu ◽  
Nan Sun ◽  
Ting Wang ◽  
Nan Sun ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Beta Cyclodextrin ◽  
Degradation Of Methyl Orange

Synthesis and Photocatalytic Activity of Silicon-Substituted Hydroxyapatite

2014 ◽  
Vol 636 ◽  
pp. 115-117
Author(s):  
Ke Jun Liu ◽  
Hua Guang Yu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Aqueous Solutions ◽  
Photocatalytic Degradation ◽  
Congo Red ◽  
Degradation Efficiency

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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