过硫酸盐
催化作用
水溶液
降级(电信)
光催化
材料科学
化学工程
双酚A
基质(水族馆)
环境修复
制作
纳米技术
化学
污染
有机化学
计算机科学
复合材料
环氧树脂
病理
工程类
地质学
替代医学
海洋学
生物
电信
医学
生态学
作者
Gong Zhang,WU Zong-hua,Huijuan Liu,Qinghua Ji,Jiuhui Qu,Jinghong Li
出处
期刊:Small
[Wiley]
日期:2017-09-12
卷期号:13 (41)
被引量:68
标识
DOI:10.1002/smll.201702225
摘要
Inspired by living systems, the construction of smart devices that can self-heal in response to structural damage is a promising technology for maintaining the high activity and stability of catalysts during heterocatalytic reactions. Here this study demonstrates an ingenious platform that enabled efficient persulfate (PS) activation for contaminant degradation via integrating a catalyst with photoactuation regeneration. Under irradiation, it is unambiguously confirmed that the collective properties of a tailored FeOOH@C3 N4 catalyst permit interfacial photoexcited electron transport from the photocatalyst substrate to needle-shaped FeOOH. This results in the simultaneous recovery of Fe(III) and optimization of the Fe(II)/Fe(III) ratio on FeOOH surface during PS activation process, so that the healed chemical structure ensures that subsequent PS activation remains unimpaired. Aqueous organic contaminant (bisphenol A) oxidation efficacy in this system is almost 20 times higher than for photo- or Fenton-oxidation alone. This work highlights the concept of catalyst regeneration for stable reactive species generation in solution, which represents alternative application of photocatalysis for practical environmental remediation. Further, the photoactuation healing approach can be expanded into various domains, such as material fabrication or chemical synthesis.
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