We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Flower-Shaped C-Dots/Co 3 O 4 {111} Constructed with Dual-Reaction Centers for Enhancement of Fenton-Like Reaction Activity and Peroxymonosulfate Conversion to Sulfate Radical.
- Authors
Wen, Zhibin; Zhu, Qianqian; Zhou, Jiali; Zhao, Shudi; Wang, Jinnan; Li, Aimin; Chen, Lifang; Bian, Weilin
- Abstract
Novel flower-shaped C-dots/Co3O4{111} with dual-reaction centers were constructed to improve the Fenton-like reaction activity and peroxymonosulfate (PMS) conversion to sulfate radicals. Due to the exposure of a high surface area and Co3O4{111} facets, flower-shaped C-dots/Co3O4{111} could provide more Co(II) for PMS activation than traditional spherical Co3O4{110}. Meanwhile, PMS was preferred for adsorption on Co3O4{111} facets because of a high adsorption energy and thereby facilitated the electron transfer from Co(II) to PMS. More importantly, the Co–O–C linkage between C-dots and Co3O4{111} induced the formation of the dual-reaction center, which promoted the production of reactive organic radicals (R•). PMS could be directly reduced to SO4−• by R• over C-dots. On the other hand, electron transferred from R• to Co via Co–O–C linkage could accelerate the redox of Co(II)/(III), avoiding the invalid decomposition of PMS. Thus, C-dots doped on Co3O4{111} improved the PMS conversion rate to SO4−• over the single active site, resulting in high turnover numbers (TONs). In addition, TPR analysis indicated that the optimal content of C-dots doped on Co3O4{111} is 2.5%. More than 99% of antibiotics and dyes were degraded over C-dots/Co3O4{111} within 10 min. Even after six cycles, C-dots/Co3O4{111} still remained a high catalytic activity.
- Subjects
CHARGE exchange; SULFATES; TURNOVER frequency (Catalysis); CATALYTIC activity; SURFACE area; PERSULFATES
- Publication
Catalysts (2073-4344), 2021, Vol 11, Issue 1, p135
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal11010135