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Photo-Fenton reaction is a kind of advanced oxidation technology based on the reaction of hydroxyl radical. In order to further enhance the photocatalytic efficiency, with citric acid as the catalytic additive, and malachite green as the substrate, experiments on the photocatalytic oxidation of organic pollutants in UV/Fenton/Citric acid system were carried out. Effect of Fe(II) concentration, initial...
In a phosphate buffer medium of pH 7.0, free iodine liberated through the oxidation of I- by IO3-, reacts with excess I- to form a binary complex of I3-, which reacts further with CTMAB to form a ternary ion association complex of CTMA+ldrI3-. This ternary complex is easily soluble and kept stable in organic solvents, in which it has absorption maximum at 365 nm. In the presence trace amounts of...
In order to investigate the effects of photocatalysis technique to the wastewater of dye, a new carrier of catalyst- micron attapulgite clay was selected. The TiO2/attapulgite clay photocatalyst was prepared by the sol-gel method. X-ray diffraction indicates that its diffracted peak of surface is same as the characteristic peak of TiO2. SEM pictures showed the form of sample is amorphous, and the...
A new carrier of catalyst was chosen. Sol-gel method was used to preparate TiO2/potassium titanate photocatalyst. EDS shows the main peck included Ti, O, K in potassium titanate whisker. The main peak of K disappeared and the peaks of Ti, O stayed after whisker was covered. It directed that the surface of sample was covered by TiO2. The figure of UV-vis diffuse reflection shows TiO2/potassium had...
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