Controllable Synthesis And Applications Of Copper Oxide,Zinc Oxide Micro/nanostructures

CuO, ZnO, ZnO-ZnFe2O4micro/nanoscale materials with specialoptic, electrical, magnetism and thermal properties have attractedintensive interest, and these materials have many potential applications indifferent fields. As we know, the properties of micro/nanomaterials areclosely related to morphologies and structures. Therefore, manyresearchers are committed to the controlled synthesis of material withdifferent morphologies. In this paper, we obtained the materials withdifferent shape by changing the time, concentration, mass ratio and so on.And these materials show excellent behavior in removing the organicpollutants. The detail contents of this paper as follows:1. Twinned-hemisphere-like CuO architectures with sizes rangingfrom2to2.5μm have been successfully prepared via a simplehydrophilic polymer-assisted hydrothermal route. The morphology ofCuO is greatly affected by the mass ratio of Cu(CH3COO)2.H2O: PSSand the quantities of NaF. The different morphological products havebeen obtained and also been discussed in detail in this paper. Theadsorption capacity of the twinned-hemisphere product was detected andit was found that the as-obtained CuO twinned-hemispheres show highselectivity and short removal times to separate dyes from wastewater witha low cost and no secondary pollution.2. Novel nanorods based ZnO architectures are synthesized bysintering a ZnOHF intermediate at400oC for2hours. The intermediateassembled by nanorods is prepared by a hydrothermal treatment using ahydrophilic polymer poly (sodium4-styrenesulfonate) as soft template.By adjusting the amount of PSS, ZnOHF with different structures arefabricated. The morphology and size of ZnOHF can be tuned by alteringamount of PSS. A proper mechanism has been proposed to explain the growth process of various structured ZnOHF and ZnO. The obtainednanorods assembled ZnO architectures show photocatalytic efficiency bydegradation RhB.3. A quick and facile method is proposed to produce ZnO-ZnFe2O4nanocomposite material with high photocatalytic activity and magneticproperties in this chapter. ZnO-ZnFe2O4composites exhibited strongerand broader absorption than pure ZnFe2O4ranging from UV to visiblelight region. And in this chapter the degradation of MB dye under visiblelight irradiation has been conducted to evaluate the photocatalysis abilityof the products. The MB (10mg/L) is removed totally within50minutesunder visible light irradiation. Therefore, the combining of ZnO andZnFe2O4greatly improves the photocatalytic activity in visible lightirradiation. What is more, the ZnO-ZnFe2O4can be effectively separatedfrom catalyst system due to the good magnetic property which solves thedifficulty of catalyst separation.