文献类型：期刊文献

英文题名：Enhanced degradation of organic pollutants over Cu-doped LaAlO3 perovskite through heterogeneous Fenton-like reactions

作者：Wang, Huihui[1,2];Zhang, Lili[1];Hu, Chun[1,3,4];Wang, Xiangke[2,5];Lyu, Lai[1,3,4];Sheng, Guodong[6]

机构：[1]Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China;[2]North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China;[3]Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China;[4]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[5]King Abdulaziz Univ, Fac Sci, NAAM Res Grp, Jeddah 21589, Saudi Arabia;[6]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China

年份：2018

卷号：332

起止页码：572

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000414913700063)、、WOS

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 21407165, 51538013), and the National Key Research and Development Plan (2016YFA0203204). We thank the BL14W1 beamline at the Shanghai Synchrotron Radiation Facility (SSRF, China) for providing the beam time.

语种：英文

外文关键词：Cu-doped LaAlO3 perovskite; Fenton-like reaction; Active species; Organic pollutants

外文摘要：Cu-doped LaAlO3 perovskite (LaAl1-xCuxO3) was synthesized via a Pechini-type sol-gel process for the oxidative degradation of persistent organic compounds. The characterization results show that Cu was incorporated into the structure of sphere-like LaAlO3 and formed the bond of La/Al-O-Cu. LaAl0.95Cu0.05O3 performed excellent activity and stability for the degradation and mineralization of various organic pollutants through heterogeneous Fenton-like reactions. In the practical reaction process, at the organic pollutant initial concentration of 25 mg L-1, 1.0 mol H2O2 produces 1.8 mol HO center dot radicals within 60 min and 1.0 mol H2O2 still produces 1.3 mol HO center dot radicals after reaction time of 240 min. The results of ESR and active species trapping experiments indicated that HO center dot radicals acted the dominant role during the degradation of pollutants in LaAl0.95Cu0.05O3/H2O2 system. Combining with in-situ Raman analysis and the XPS results of LaAl0.95Cu0.05O3 before and after reaction, H2O2 was predominantly reduced to HO center dot on the electron-rich Cu center, and H2O2/H2O can be dissociated on oxygen vacancies (OVs) to enhance formation of HO center dot on the surface of LaAl0.95Cu0.05O3, resulting in the high catalytic activity of LaAl0.95Cu0.05O3. This efficient material can potentially be used as a promising catalyst for the efficient degradation of organic pollutants in environmental pollution cleanup.