Based On Cobalt Iron Oxide Detection Of Heavy Metal Ion In Water

In today's society,with the rapid development of economy,the environment we live on is also facing serious pollution problems,among which heavy metal ions are increasingly serious pollution problems to the water environment.As is known to all,with the development of many industries such as industry and agriculture,inorganic pollution also enters the water environment,among which the pollution of heavy metal ions with high toxicity and difficult degradation is especially serious.Common heavy metal Pb,Hg,Cu,Cd,Cr,As,Zn,etc.,when they enter the water environment,probably after adsorption,complexation,enrichment,and may cause serious damage to the natural environment,As well As possible through the food chain into animal and human body medium,resulting in irreversible,continuous damage,therefore,be badly in need of the development of a low cost,simple operation,high sensitivity,fast analysis speed,good portability detection means,for the electrochemical detection method with these characteristics cornpletely,Therefore,it is regarded as the most suitable method for the detection of heavy metal ions in the water environment.The morphology and microstructure of catalyst material also have great influence on its electrocatalytic performance.In recent years,porous nanomaterials have attracted more attention due to their better chemical and physical properties.we attempted to synthesize bimetallic oxides with these characteristics and similar composites to achieve high sensitivity detection of heavy metal ions.In this study,we mainly synthesized two different cobalt and iron oxides to analyze the detection mechanism of materials.To this end,the following work has been carried out:By the typical hydrothermal method first,The cobalt iron oxide nanosheet precursor was synthesized by typical hydrothermal method,annealed treatment and then to get the target materials(FeCo2O4),We on the morphology and properties of characterization,and the material successfully constructed electrochemical sensor,through the optimization of experimental conditions,determined the experimental parameters,and its application in the detection of heavy metal ions in the solution,implement the detection of four kinds of typical heavy metal ions,and has a good detection effect on Pb(?),the sensitivity and detection limit were 66.5 ?A/?M and 0.09 ?M.Finally,the experiment proves that the material has good stability and repeatability.Second,in view of the As(III)ion detection,we adopted the new way of synthesis,by optimizing the material synthesis conditionssuccessfully with ultra-thin cobalt iron oxide film As the precursor,success in its surface recombination AuNPs particles constitute a kind of new functional materials of nano composite(AuNPs/FeCoOx),and synthetic materials by SEM,TEM and XRD characterization;The electrochemical characterization of the material was performed,at the same time As(III)has good detection effect,and the sensitivity of 1.45?A/ppb and lower detection limit of 0.27 ppb,then on the actual sample testing,anti-interference experiment,the stability and reproducibility experiment,and relatively good effect is obtained,finally by XPS,FT-IR characterization methods to explore the mechanism of the test and the reasonable explanation,and focuses on nanometer structure adsorption and catalytic performance of the influence law of electrochemical behavior.