Room Temperature Synthesis Of Cobalt And Nickel Nanoparticles And Their Adsorptive Property

In this paper,the conditions of synthesis of nickel and cobalt nanoparticles were studied.By changing the amount of reagents,crystal growth was controlled,and nickel and cobalt nanoparticles with different shapes and sizes were gained.The adsorption and magnetic properties of the nanoparticles were measured,and the potential applications of the cobalt and nickel nanoparticles in wastewater treatment were evaluated.The main contents and results are as follows:1.The magnetic Ni nanoparticles of 10–30 nm in size with FCC structure were synthesized by room temperature liquid phase reduction method.XRD patterns and FESEM micrographs showed the constituent and structure and micromorphology.Congo red was used as adsorbate to quantitatively examine the adsorption capability of Ni nanoparticles for the organic dyes in industry wastewater.The main adsorption classification belongs to chemical adsorption.The adsorption capacity of Congo red CR solution is 967.7mg?g^-1.CR can be removed 83%within 5 min.The Saturation magnetization of nickel nanoparticles adsorbed with Congo red CR is 26 emu?g^-1.The magnetic hysteresis measurement indicated that the Ni nanoparticles presented ferromagnetic properties.The experimental results showed the as-obtained Ni nanoparticles might be a potential adsorbent in sewage treatment process.2.Co nanomaterial with HCP structure was prepared by room temperature liquid phase reduction method.The Co nanoparticles exhibits outstanding removal abilities including organic dye?Congo red?.The main adsorption mechanism is chemical adsorption.The adsorption capacity of Congo red CR solution is 800 mg?g^-1.Moreover,CR can be removed100%within 20 min.The Saturation magnetization of nickel nanoparticles adsorbed with Congo red CR is 49 emu?g^-1,and was easily gathered by magnetic bar.The results indicated that Co nanopaticles may be meaningful for practical application in the field of sewage treatment.