废弃催化剂再利用的生物分泌物的自我剂
Min Li1,2,3, Liya Fu1,3, Yue Yuan1,3
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Nature communications
|December 2, 2025
概括
废物催化剂通过一种新的碳化方法再生为高度活性的纳米单原子位点催化剂. 这种可持续的方法减少了废水的化学氧气需求,证明了增强的催化性能和经济可行性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 催化剂是一种催化剂.
背景情况:
- 废物催化剂带来了处置成本和环境风险.
- 催化剂再生对于可持续性和活动至关重要.
- 开发高效的再生方法是迫切需要的.
研究的目的:
- 开发一种简单且可重复的方法,用于再生废弃臭氧化催化剂.
- 从废物中合成高活性和稳定的基于碳的纳米单原子位点催化剂 (NSASCs).
- 证明催化剂再生战略的经济可行性和可持续性.
主要方法:
- 自吸附生物分泌物的碳化产生Cu@graphitic碳 (GC) -Al2O3 NSASCs.
- 在GC-Al2O3基体上Cu金属原子的分散.
- 对Cu@GC-Al2O3/O3系统进行试点规模的演示.
- 生命周期评估 (LCA) 用于经济和可持续性评估.
主要成果:
- 再生催化剂 (Cu@GC-Al2O3) 的活性和稳定性得到了提高.
- 废水的平均化学氧气需求 (COD) 从79.56降至30.01毫克L-1.1.
- Cu1-C3位点促进了*Oad形成,而Cun-Cun位点产生了O2•−和1O2,从而产生了协同的催化效应.
结论:
- 开发的方法提供了一种可持续的方法,将废弃催化剂转化为有价值的资源.
- 在臭氧化过程中,Cu@GC-Al2O3 NSASCs 显示出卓越的性能.
- 这一战略为废弃物催化剂的重新激活提供了一个一般的途径,并激发了新的材料改造技术.
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