Synthesis Of Co Nanoparticles And Coni Nanomaterials And Study Of The Performance Of Sewage Treatment

In this paper, the conditions of synthesis of cobalt nanomaterials and CoNi alloy arestudied. By changing the reaction conditions, crystal growth is controlled, and theapplication prospects of the Cobalt adsorbents in water treatment is measured. The maincontents and results are as follows:1. Co2+ion was reduced by NaBH4to form cobalt nanoparticles with10-20nm in size.The as-obtained Co nanoparticles were stable in air. Congo red was used to evaluate theCo nanoparticles’wastewater treatment capability. It was found that150ppm Congo redcould be removed from water within2min with these Co nanoparticles, and theadsorption maximum is800mg g-1.2. Co nano-hybrid material with hcp and fcc mixture structure was prepared by ahydrothermal method. Furthermore, mixture morphologies were also present in the Conano-hybrid, including catenulate hcp-Co and lamellar structured fcc-Co. The Conano-hybrid exhibits outstanding removal abilities including organic dye (Congo red),drug (salicylazosulfapyridine) and heavy metal cation (Pb2+) and anion (Cr2O72-).Moreover, CR, SASP, Pb2+and Cr2O72-can be removed100%,100%,90%and68%within20min, respectively. Its strong and comprehensive removal ability for variouspollutants may be meaningful for practical application of Co nano-hybrid in the field ofsewage treatment.3. The CoxNi1-xnanoparticles had been successfully synthesized via an additive-free directreduction method. The product were characterized by X-ray diffraction (XRD), scanningelectron microscopy (SEM), and vibrating sample magnetometer. The as-preparedproducts were used to investigate their promising applications in water treatment. Due totheir small size, large surface area and special structure, the S3sample exhibited the bestadsorption capacity(800mg g-1) and efficiency(2min). The facile synthesis method andthe superior adsorption performance derived from the Co0.6Ni0.4nanoparticles displaythe potential applications for the removal of Congo red from aqueous solution.