Effects of Synthesis Conditions on Characteristics of Ni/Fe Nanoparticles and Their Application for Degradation of Decabrominated Diphenyl Ether
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Ni/Fe bimetallic nanoparticles have been widely used as strong reductants to degrade organic pollutants. Synthesis parameters of Ni/Fe nanoparticles can directly affect their characteristics and reactivity. In this study, Ni/Fe nanoparticles were prepared at different synthesis conditions, namely, synthesizing temperature, stirring rate, washing solutions, and preparation methods (post-coated and co-reducted Ni/Fe nanoparticles), and investigated their effectiveness of decabrominated diphenyl ether (BDE209) degradation. The results showed that the successive order of factors affecting the kinetics constant of Ni/Fe nanoparticles for the removal of decabrominated diphenyl ether (BDE209) were preparation methods, washing solutions, stirring rate, and synthesis temperature. It should be noted that the kinetics constants of post-coated Ni/Fe nanoparticles for removal of BDE209 was 0.049 min−1, which was 14 times higher than that of co-reducted Ni/Fe nanoparticles. Moreover, the most remarkable influence on the particle size of Ni/Fe nanoparticles was the stirring rate, others synthesis conditions are mentioned in the following order: washing solutions > preparation methods > synthesis temperature. Interestingly, the effects of synthesis condition on the crystalline structure of Ni/Fe were weak. The results may facilitate more effective application of Ni/Fe nanoparticles for degradation of BDE209.
KeywordsNi/Fe bimetallic nanoparticles Synthesis conditions Polybrominated diphenyl ethers Degradation
The authors acknowledge the financial support from the Joint Foundation of NSFC-Guangdong Province (Grant No. U1401235) and Guangdong Province Environment Remediation Industry Technology Innovation Alliance.
(Grant No. 2017B090907032).
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
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