Study on Preparation and Photocatalytic Activity of Al2O3 Composite Magnetic Materials

Under various experimental conditions, the paper, taking Al₂O₃ as modified materials, conducts a study on the catalysis performance of magnetic photochemical catalyzing materials as well as a preliminary analysis on its reaction kinetics. The result indicates four conclusions as following. Firstly, the original concentration of the degraded solution imposes significant influence on photochemical catalysis degradation rate, and they are inversely proportional to each other. Secondly, the feeding quantity of catalyzing material has an optimum value at 1.8 g, namely, photochemical catalysis degradation rate will be reduced if the feeding quantity is higher or lower than this value. Thirdly, Change of pH value exerts tremendous influence on methylene blue solution degenerated by catalyzing materials; and degradation rate enhances with the increase of pH value. Lastly, Photochemical catalysis degradation methylene blue reaction of Al₂O₃ composite magnetic materials complies with first-order action kinetics equation; and ln(C₀/C) keeps an good linear relationship with time (t).