Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 290, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120048
Keywords
Benzophenone-4; CuBi2O4; Peroxymonosulfate; Microwave-assisted synthesis; Theoretical calculation
Funding
- Beijing Forestry University Outstanding Young Talent Cultivation Project [2019JQ03008]
- National Natural Science Foundation of China [22076012, 51878047]
- Beijing Natural Science Foundation [L182027]
Ask authors/readers for more resources
This study found that well-distributed CuBi2O4 microspheres with active sites and hydroxyl groups on the surface can effectively activate PMS to degrade BP-4. The degradation mechanism of BP-4 was proposed through theoretical calculations and intermediates identification, showing that radical addition reaction is the main pathway for BP-4 oxidation.
Well-distributed CuBi2O4 microspheres prepared by microwave-assisted co-precipitation method and subsequent calcination treatment were used to activate peroxymonosulfate (PMS) for benzophenone-4 (BP-4) degradation. Uniformly distributed active sites, hydroxyl groups, and the cycle of Cu(I)/Cu(II) on the surface of CuBi2O4 microspheres effectively facilitated PMS activation to generate SO4 center dot-, (OH)-O-center dot and O-1(2), but O-1(2) was not the dominant reactive oxygen species. The degradation mechanism of BP-4 was proposed through theoretical calculations and intermediates identification that the first and dominant step of BP-4 oxidation with SO4 center dot-/(OH)-O-center dot is radical addition reaction rather than single electron transfer. It breaks through previous reports that reaction between SO4 center dot- and electron-rich aromatic organics is mainly via single electron transfer. Ecotoxicity assessment by ECOSAR program indicated that the presence of Cl- did not increase the toxicity of intermediates because generated chlorinated intermediates are hydrophilic.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available