Fe3O4磁性纳米颗粒与鲁米诺的化学发光反应研究

Fe3O4 Magnetic Nanoparticles (MNPs) with an average size of 30 nm were synthesized and characterized with Zeta Sizer Nano-ZS instrument and X-ray powder diffraction methods. The effect of Fe3O4 MNPs on the luminol Chemiluminescence (CL) was investigated. It was found that in a slightly acidic condition(pH 3-5), the Fe3O4 MNPs can react directly with luminol to produce light emission. The iron ions in the leaching solution and in the Fe3O4 MNPs suspension solution were analyzed with the1,10-Phenanthroline spectrophotometric method, and the results indicated that Fe2+ on the nanoparticle surface is the major contributor to the catalytic effect. The effects of various coating agents on the CL reaction was also investigated. The results indicated that the Fe3O4 MNPs coated by citric acid can enhance the CL intensity when compared with that of uncoated Fe3O4 MNPs.