| Title | Novel CuCo2O4 Composite Spinel with a Meso-Macroporous Nanosheet Structure for Sulfate Radical Formation and Benzophenone-4 Degradation: Interface Reaction, Degradation Pathway, and DFT Calculation |
| Authors | Wang, Yiping Ji, Haodong Liu, Wen Xue, Tianshan Liu, Chao Zhang, Yuting Liu, Longyan Wang, Qiung Qi, Fei Xu, Bingbing Tsang, Daniel C. W. Chu, Wei |
| Affiliation | Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing Key Lab Source Control Technol Water Poll, Beijing 100083, Peoples R China Peking Univ, Key Lab Water & Sediment Sci, Minist Educ, Coll Environm Sci & Engn, Beijing 100871, Peoples R China Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China |
| Keywords | METAL-ORGANIC FRAMEWORKS RATE CONSTANTS PEROXYMONOSULFATE ACTIVATION HETEROGENEOUS ACTIVATION EFFICIENT DEGRADATION PERFORMANCE PERSULFATE OXIDATION MECHANISM CHLORIDE |
| Issue Date | 6-May-2020 |
| Publisher | ACS APPLIED MATERIALS & INTERFACES |
| Abstract | A series of CuCo2O4 composite spinels with an interconnected meso-macroporous nanosheet morphology were synthesized using the hydrothermal method and subsequent calcination treatment to activate peroxymonosulfate (PMS) for benzophenone-4 (BP-4) degradation. As-prepared CuCo2O4 composite spinels, especially CuCo-H3 prepared by adding cetyltrimethylammonium bromide, showed superior reactivity for PMS activation. In a typical reaction, BP-4 (10.0 mg/L) was almost completely degraded in 15 min by the activation of PMS (200.0 mg/L) using CuCo-H3 (100.0 mg/L), with only 9.2 mu g/L cobalt leaching detected. Even after being used six times, the performance was not influenced by the lower leaching of ions and surface-absorbed intermediates. The possible interface mechanism of PMS activation by CuCo-H3 was proposed, wherein a unique interconnected meso-macroporous nanosheet structure, strong interactions between copper and cobalt, and cycling of Co(II)/Co(III) and Cu(I)/Cu(II) effectively facilitated PMS activation to generate SO4 center dot- and (OH)-O-center dot, which contributed to BP-4 degradation. Furthermore, combined with intermediates detected by liquid chromatography quadrupole time-of-flight mass spectrometry and density functional theory calculation results, the degradation pathway of BP-4 involving hydroxylation and C-C bond cleavage was proposed. |
| URI | http://hdl.handle.net/20.500.11897/589183 |
| ISSN | 1944-8244 |
| DOI | 10.1021/acsami.0c03481 |
| Indexed | SCI(E) Scopus |
| Appears in Collections: | 环境科学与工程学院 水沙科学教育部重点实验室（联合） |
