标題：Catalyst-free activation of peroxides under visible LED light irradiation through photoexcitation pathway作者：Gao, YW (Gao, Yaowen); Li, YX (Li, Yixi); Yao, LY (Yao, Linyu); Li, SM (Li, Simiao); Liu, J (Liu, Jin); Zhang, H (Zhang, Hui)

來源出版物：JOURNAL OF HAZARDOUS MATERIALS 卷：329頁碼：272-279 DOI：10.1016/j.jhazmat.2017.01.046 出版年： MAY 5 2017

摘要： Catalysts are known to activate peroxides to generate active radicals (i.e., hydroxyl radical ((OH)-O-center dot) and sulfate radical (SO4 center dot-)) under certain conditions, but the activation of peroxides in the absence of catalysts under visible light irradiation has been rarely reported. This work demonstrates a catalyst-free activation of peroxides for the generation of (OH)-O-center dot and/or SO4 center dot- through photoexcited electron transfer from organic dyes to peroxides under visible LED light irradiation, where Rhodamine B (RhB) and Eosin Y (EY) were selected as model dyes. The formation of (OH)-O-center dot and/or SO4 center dot- in the reactions and the electron transfer from the excited dyes to peroxides were validated via electron paramagnetic resonance (EPR), photoluminescence (PL) spectra and cyclic voltammetry (CV). The performance of the peroxide/dye/Vis process was demonstrated to be altered depending on the target substrate. Meanwhile, the peroxide/dye/Vis process was effective for simultaneous decolorization of dyes and production of active radicals under neutral even or basic conditions. The findings of this study clarified a novel photoexcitation pathway for catalyst-free activation of peroxides under visible light irradiation, which could avoid the secondary metal ion (dissolved or leached) pollution from the metal-based catalysts and expand the application range of the peroxide-based catalytic process.

入藏号： WOS:000396950700031

文獻類型：Article

語種：English

作者關鍵詞： Peroxides; Dyes; Photoexcitation; Electron transfer; Active radicals

擴展關鍵詞： ENHANCED HETEROGENEOUS ACTIVATION; ADVANCED OXIDATION PROCESSES; ELECTRON-SPIN-RESONANCE; ORGANIC POLLUTANTS; FE-CO/SBA-15 CATALYST; HYDROGEN-PEROXIDE; AQUEOUS-SOLUTION; ORANGE II; DEGRADATION; PERSULFATE

通訊作者地址：Zhang, H (reprint author), Wuhan Univ, Dept Environm Engn, Wuhan 430079, Peoples R China.

電子郵件地址： eeng@whu.edu.cn

地址：

[Gao, Yaowen; Li, Yixi; Yao, Linyu; Li, Simiao; Liu, Jin; Zhang, Hui] Wuhan Univ, Dept Environm Engn, Wuhan 430079, Peoples R China.

[Gao, Yaowen; Zhang, Hui] Wuhan Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China.

研究方向： Engineering; Environmental Sciences & Ecology

ISSN：0304-3894

eISSN: 1873-3336

影響因子：4.836