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Preparation, Characterization and Application of Semiconductor ZnO Composites

Author: XiaJuan
Tutor: SuZhongXing
School: Lanzhou University
Course: Physical and chemical
Keywords: Composites Preparation Structural characterization Photocatalytic Kinetic reaction
CLC: O614.241
Type: Master's thesis
Year: 2011
Downloads: 62
Quote: 0
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Abstract


As China 's economic and social development , energy shortages and environmental problems have become the major issues of the 21st century people faced and solved organic matter caused serious water pollution who threaten the lives and health of people . Semiconductor photocatalytic oxidation technology has the reaction at room temperature , and the direct use of solar energy as a light source such as nature , but also has a high efficiency , low selectivity , and does not produce secondary pollution of the advantages of an ideal environment pollution treatment technology concern . By solvothermal homogeneous precipitation prepared as a dual-function semiconductor magnetic composite nanomaterials Fe304/ZnO . Photocatalyst means of XRD, TEM, SEM, IR, U-vis, PL and VSM series of its structure and morphology characterized , and methyl orange dyes the photocatalytic degradation object its photocatalytic properties evaluation . This paper explores the impact of the amount of catalyst, the pH of the solution and the concentration of methyl orange photocatalytic degradation of methyl orange and research end up in the amount of catalyst was 0.51 g L -1 solution at pH 7 , methyl orange concentration of 6.0 × 10-5 mol L - 1 conditions , the photocatalytic degradation of methyl orange degradation rate of 93.6% , and study its dynamical behavior , draw its order kinetics model . Cycle degradation results show that the complex magnetic cycle degradation to better take advantage of the effect . In addition, we also used Solvothermal ZnO / Ag composite , characterized a series of measures , the same study the degradation of methyl orange photocatalytic degradation effect . By solvothermal and uniform precipitation prepared composite semiconductor nanomaterials (Fe3O4 , Ag / ZnO ) with better morphology and optical properties , the composite material characterization results proved to degradation of methyl orange can be very good to improve the efficiency of photocatalytic degradation .

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CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Metal elements and their compounds > Section II group metal element and its compounds > The zinc Vice family (Ⅱ B group metal elements ) > Zinc Zn
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