Plasmon-enhanced Catalytic Ozonation for Efficient Removal of Recalcitrant Water Pollutants
Plasmon-enhanced Catalytic Ozonation for Efficient Removal of Recalcitrant Water Pollutants
复制标题
等离激元增强催化臭氧化有效去除顽固水污染物
DOI：
10.1021/acsestengg.1c00020
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发表时间：
2021
影响因子：
7.1
通讯作者：
Wu, Tingting
中科院分区：
文献类型：
--
作者：
Yang, Wenwen;Bunian, Muntaseer;Chen, Xiankun;Heald, Steve;Yu, Lei;Wen, Jianguo;Lei, Yu;Wu, Tingting
采用简单的溶胶-凝胶法制备了Ag掺杂MnFe2O4催化剂（Ag/MnFe2O4）。利用Ag的局部表面等离子体共振（LSPR），与臭氧化和催化臭氧化相比，在低光子通量（~ 10-10Einstein L-1）下，对具有代表性的臭氧抗性水污染物（阿特拉津）的降解率分别提高了~ 35倍和~ 7倍，这也优于均相过氧酮（O3/H2O2）工艺。等离子体介导的增强是通过在LSPR衰变过程中能量从等离子体Ag纳米结构转移到臭氧吸附位点实现的，导致臭氧分解加速，随后在现有和新激活的催化活性位点产生自由基（如·OH， O2·-和1o2）。Ag LSPR还有助于维持ag0在氧化的水环境中，这是维持高催化活性的关键。由于这些等离子体效应，在实际的水处理条件下，自来水的去除率达到90%以上。
Ag-Doped MnFe2O4catalyst (Ag/MnFe2O4) was synthesized by a simple sol–gel method followed by H2reduction. Utilizing the localized surface plasmon resonance (LSPR) of Ag, ∼35-fold and ∼7-fold degradation rate increases for a representative ozone-resistant water pollutant (atrazine) were achieved with a low photon flux (∼10–10Einstein L–1), as compared to ozonation and catalytic ozonation, respectively, which also outperformed the homogeneous peroxone (O3/H2O2) process. The plasmon-mediated enhancement was realized through energy transferred from plasmonic Ag nanostructures to ozone adsorptive sites during the LSPR decay, leading to an accelerated ozone decomposition and subsequent radical generation (e.g., ·OH, O2·–, and1O2) at both existing and newly activated catalytic active sites. Ag LSPR also helps maintain Ag0in an oxidizing aqueous environment, which is crucial to sustain the high catalytic activity. Because of these plasmonic effects, more than 90% removal was achieved in tap water under realistic water treatment conditions.
影响因子：
4.2
作者：
Wenwen Yang;Tingting Wu
通讯作者：
Wenwen Yang;Tingting Wu
影响因子：
3.7
作者：
A. Kronenberger;A. Polity;D. Hofmann;B. Meyer;A. Schleife;F. Bechstedt
通讯作者：
A. Kronenberger;A. Polity;D. Hofmann;B. Meyer;A. Schleife;F. Bechstedt
影响因子：
12.8
作者：
Beltran, Fernando J.;Aguinaco, Almudena;Garcia-Araya, Juan F.
通讯作者：
Garcia-Araya, Juan F.