| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials
|
| Presentation Title |
Natural Illite-based Ultrafine Cobalt Oxide with Abundant Oxygen Vacancy for Highly Efficient Fenton-like Catalysis |
| Author(s) |
Zhiming Sun, Xiongbo Dong, Chunquan Li, Shuilin Zheng |
| On-Site Speaker (Planned) |
Zhiming Sun |
| Abstract Scope |
Natural illite microsheets were firstly utilized to induce oxygen vacancies into ultrafine cobalt oxide (Co3O4) for highly efficient Fenton-like catalysis via activation of peroxymonosulfate (PMS). The results indicated that presence of illite microsheets regulated multidirectional crystallization of Co3O4 nanospheres and resulted in reduced
grain size and crystallinity. The smaller grain size provided more
reactive edge sites for PMS catalysis. The numerous indistinct lattice
boundaries caused by reduced crystallinity created abundant oxygen
vacancies. Density functional theory (DFT) calculations illustrated that
presence of oxygen vacancies significantly reduced adsorption energy and
accelerated electron transfer, which further faciliated PMS activation.
The oxygen vacancy-rich Co3O4/illite exhibited superior catalytic
efficiency in real water matrix. Apart from sulfate and hydroxyl
radicals, singlet oxygen generated from oxygen vacancy-based reaction
pathway also played a significant role in atrazine degradation. This
strategy provided new insight for future designing of natural mineral based
catalysts for efficient wastewater treatment via Fenton-like process. |
| Proceedings Inclusion? |
Planned: |