State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, PR China.
Environ Sci Technol. 2010 Dec 1;44(23):9123-7. doi: 10.1021/es1027234. Epub 2010 Nov 4.
Phase-pure layered perovskite La(4)Ni(3)O(10) powders were synthesized by a solution combustion approach. It is found that, in the presence of the La(4)Ni(3)O(10) powders, aqueous azo dyes can be degraded catalytically and efficiently under ambient conditions. Neither light nor additional reagents are needed in the catalytic reaction. The dye degradation procedure can be accelerated markedly by magnetic stirring. A systemic series of chemical and electrochemical experiments suggested that the dye degradation proceeds through electron transfers from the dye molecules to the catalyst and then to electron acceptors such as dissolved oxygen. The present catalytic degradation requires no additional reagents or external energy input, which hence provides a potentially low-cost alternative for the remediation of azo-dye effluents.
采用溶液燃烧法合成了纯相层状钙钛矿 La(4)Ni(3)O(10) 粉末。研究发现，在 La(4)Ni(3)O(10) 粉末存在的条件下，偶氮染料可以在环境条件下被高效催化降解。在催化反应中既不需要光也不需要添加其他试剂。通过磁搅拌可以显著加速染料的降解过程。一系列化学和电化学实验表明，染料的降解是通过染料分子向催化剂转移电子，然后转移到溶解氧等电子受体来进行的。目前的催化降解不需要添加其他试剂或外部能量输入，因此为偶氮染料废水的处理提供了一种潜在的低成本替代方法。
