Synthesis of CMC��Stabilized Fe/Ni Bimetal Nanoparticles for ��in situ�� Reductive Dechlorination of PCB77
LIU Chang-Guang1, ZHAO Lin2, DING Shu2, TAN Xin1,2, YU Shun-Lei1
1.��School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; ��
2.�� School of Environment Science and Technology, Tianjin University, Tianjin 300072, China
Abstract��
The CMC-Ni/Fe bimetallic nanoparticles were successful synthesized with the monodispersed carboxymethyl cellulose (CMC) as a stabilizer. The various reaction parameters were optimized. Nanoparticles, prepared with m(CMC)/m(Fe)=5 and m(Ni)/m(Fe)=0.03 at 25 ��, showed the best degradation effect of PCB77. Near 94% of reduction efficiency was achieved by CMC-Ni/Fe bimetallic nanoparticles for 48 h treatment, while only about 71% PCB77 was degraded by Ni/Fe bimetallic nanoparticles. The results of XRD showed that the CMC-Ni/Fe bimetallic nanoparticles exhibited the characteristic peaks of elemental iron and the characteristic peaks of iron oxides were not detected. It was indicated that the elemental iron of CMC-Ni/Fe bimetallic nanoparticles was not oxidized in preparation process. The results of particle size analysis were demonstrated that the average diameter of CMC-stabilized Ni-Fe bimetallic nanoparticles was about 23.94 nm, smaller than the particle size of Ni/Fe bimetallic nanoparticles (100 nm).
LIU Chang-Guang, ZHAO Lin, DING Shu, TAN Xin, YU Shun-Lei.Synthesis of CMC��Stabilized Fe/Ni Bimetal Nanoparticles for ��in situ�� Reductive Dechlorination of PCB77[J]. Chemcial Industry and Engineering, 2012,29(5): 13-17
2012, Vol. 29 
