التفاصيل البيبلوغرافية
| العنوان: |
Cu single atoms anchored on hydrangea-like carbon nitride for facilitating photo-Fenton: Role of Cu2+/Cu+ cycle. |
| المؤلفون: |
Guo, Zhipeng1 (AUTHOR), Wei, Wei1 (AUTHOR) weiwei523@njupt.edu.cn, Li, Yihang1 (AUTHOR), Niu, Xianghong1 (AUTHOR) xhniu@njupt.edu.cn, Hou, Fengming1,2 (AUTHOR), Li, Jin1 (AUTHOR), Zhang, Xiaoke1 (AUTHOR), Zhang, Xiuyun3 (AUTHOR), Wei, Ang1,4 (AUTHOR) wei1177@126.com |
| المصدر: |
Separation & Purification Technology. Sep2024, Vol. 344, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*NITRIDES, *COPPER, *METAL activation, *DENSITY functional theory, *ATOMS, *POLLUTION |
| مستخلص: |
[Display omitted] • 1. A strongly metal-support interaction of Cu-SA/CNH catalyst was prepared. • 2. The Cu-SA/CNH with Cu−N 4 coordination was utilized for the photo-Fenton reaction. • 3. The Cu−N 4 facilitated the Cu2+/Cu+ cycle through intermediate state formation. • 4. The affinity of H 2 O 2 to bind with Cu d xz increased nearly 10 times. • 5. The Cu-SA/CNH/PF system achieved an impressive 98.1% degradation efficiency of TC. Single-atom photo-Fenton (PF) reaction is widely employed for the degradation of antibiotics and water disinfection. However, the key fundamental issues of the valence state cycling of single-atom metals and the activation of hydrogen peroxide (H 2 O 2) in the PF process remain indistinct. Herein, we developed a catalyst donated as Cu single atoms anchored hydrangea-like carbon nitride (Cu-SA/CNH) with Cu−N 4 coordination for PF reaction. Compared to pristine CNH, the Cu-SA/CNH exhibited a 2.42-fold increase in PF kinetics. The Cu-SA/CNH/PF system achieved 98.1% degradation efficiency of tetracycline and effectively inactivated Escherichia coli within 30 min. Density functional theory calculations demonstrated that the formation of Cu−N 4 effectively improved the energy of the Cu d orbitals, leading to the generation of intermediate states that facilitated the Cu2+/Cu+ cycle. The adsorption capacity of Cu d xz orbitals on H 2 O 2 increased nearly 10 times. This work provides valuable insights for enhancing single-atom PF activity to address environmental pollution. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
