Solution-synthesis And Property Studies Of Copper-based Nanomaterials

Because of its special physical and chemical properties,copper based nanomaterials have great application potential in the field of catalysis and sensing.In this paper,a series of copper oxide nanomaterials with different dimensions and high activity copper nanomaterials were successfully prepared by a simple low temperature liquid phase synthesis method.The growth mechanism of copper oxide nanostructures in leaf and sea urchin shape was investigated.The preparation methods and properties of highly active copper nanoparticles were studied.Electrochemical tests were carried out on many copper based materials.The specific work can be divided into three parts.First,At 40 ? using Cu(CH3COO)2 as copper source and NaOH solution as alkali source,leaf and sea urchin CuO nanomaterials were successfully synthesized by controlling the amount of Na3PO4.The formation mechanism of the leafy and highly assembled sea urchin(CuO)nanomaterials was studied by investigating the synthesis conditions such as the addition order and reaction time of Na3P04 and combining with the results of XRDX SEMU HR-TEM.The results show that the assembly degree of CuO nanomaterials increases with the increase of Na3PO4 input.In the early stage of CuO nucleation,PO43-binds to the O2-on the CuO plane,which inhibits the growth of the crystal plane.Because the density of O2-exposed to each crystal face of CuO is different and the number of PO43-adsorbed on each plane is different,the growth degree of different crystal faces is different,and the sea urchin shaped CuO nanomaterials assembled by nanorods are finally formed.Electrochemical properties of CuO nanomaterials with different morphologies were studied.The results show that when the current density is1 A·g-1 and the detection potential is-0.1?0.4 V(vs.Hg/HGO)in 0.1 mol·dm-3 KOH solution,the electrode specific capacitance of the modified sea urchin CuO material is the highest,which is 171.1 F·g-1.It shows that the higher the assembly degree,the better the electrochemical performance of CuO nanomaterials.Second,using Cu(CH3COO)2 as copper source and NaOH solution as alkali source,the ribbon CuO nanomaterials were successfully prepared in 60 ? water bath by introducing NaBr into the solution and adjusting the amount of NaBr.The effect of Br-on the formation of banded CuO nanomaterials was studied by investigating the effects of the addition of NaOH solution,reaction time and the amount of NaBr on the morphology of the reaction.The results showed that the formation of intermediate Cu2(OH)3Br was beneficial to the formation of new morphology and copper oxide was prepared by heating decomposition.Third,under the condition of 80 ? water bath,using CuSO4 as copper source and NaH2PO2 as reducing agent,the high active Cu nanoparticles were synthesized by adjusting the pH value of the solution with different small organic acids from 2 to 3.Small molecular organic acids not only play a role in pH regulation,but also improve the storage stability of materials.The activity and storage stability of Cu nanomaterials modified by small molecular organic acids were studied by adjusting the reaction conditions and combining with SEMH-FR-IT TG-DTA tests.The related principles were also analyzed.Copper and Cu nanomaterials modified by different organic small molecules were used in glucose enzymatic sensor.In 0.10 mol· L-1 NaOH solution,the test voltage was 0.6 V,and 0.05mol· L-1 glucose was injected at regular intervals.The catalytic performance of Cu modified with different organic acids for glucose was different.And each kind of Cu material shows two detection curves.The sensitivity of lysine modified Cu nanomaterials for glucose detection was 253? A ·mM-1·cm-2.