Synthesis of novel Co3O4 hierarchical porous nanosheets via corn stem and MOF-Co templates for efficient oxytetracycline degradation by peroxymonosulfate activation

A highly dispersed magnetic polymetallic catalyst to activate peroxymonosulfate for the degradation of organic pollutants in wastewater

“…59 The abundant CO functional groups on the surface of Zn 0.5 Ni 0.5 Fe 2 O 4 -S, N-GO could promote the self-decomposition of PMS to form 1 O 2 (eqn (24) and (25)). 60 Moreover, the doped S and N as well as amorphous carbon in Zn 0.5 Ni 0.5 Fe 2 O 4 -S, N-GO could act as electron-transfer mediators, which facilitated the transport of electrons to PMS, in turn, promoting the generation of ROS.A 2+ + HSO 5 − → SO 4 ˙ − + A 3+ + OH − A 3+ + HSO 5 − → A 2+ + H + + SO 5 ˙ − SO 4 ˙ − + OH − → SO 4 2− + ˙OHSO 4 ˙ − + H 2 O → H + + SO 4 2− + ˙OHHSO 5 − + H 2 O → H 2 O 2 + HSO 4 − A 3+ + H 2 O 2 → A 2+ + HO 2 ˙ + H + HO 2 ˙ → O 2 ˙ − + H + O 2 ˙ − + HO 2 ˙ → HO 2 − + 1 O 2 2O 2 ˙ − + 2H + → H 2 O 2 + 1 O 2 SO 5 ˙ − + SO 5 ˙ − → S 2 O 8 2− + 1 O 2 SO 5 ˙ − + SO 5 ˙ − → 2SO 4 − + 1 O 2 …”

“…8. 60,62,63 In Route 1, P1 ( m / z = 437) was generated via the deamination and hydroxylation of OTC, then, which will further undergo dehydroxylation, demethylation, deamidation or ring-opening reactions to generate P2 ( m / z = 362) and P3 ( m / z = 362). After that, P2 further transformed to P4 ( m / z = 318), P5 ( m / z = 318), P6 ( m / z = 301) and P7 ( m / z = 301) via dehydroxylation, secondary alcohol oxidation and ring-opening reactions.…”

“…59 The abundant CO functional groups on the surface of Zn 0.5 Ni 0.5 Fe 2 O 4 -S, N-GO could promote the selfdecomposition of PMS to form 1 O 2 (eqn ( 24) and ( 25)). 60 Moreover, the doped S and N as well as amorphous carbon in Zn 0.5 Ni 0.5 Fe 2 O 4 -S, N-GO could act as electron-transfer mediators, which facilitated the transport of electrons to PMS, in turn, promoting the generation of ROS.…”

A Three-in-one ZIFs-Derived CuCo(O)/GOx@PCNs Hybrid Cascade Nanozyme for Immunotherapy/Enhanced Starvation/Photothermal Therapy

“…As a promising nanozyme, Co 3 O 4 can react with H 2 O 2 to generate O 2 to alleviate tumor hypoxia, therefore it can be introduced to activate the enzymatic activity of GOx. − Recently, transition metal oxides including Co 3 O 4 derived from metal–organic frameworks (MOFs) have been extensively investigated in the field of catalysts and supercapacitors. , The high surface area and high porosity of MOFs make them ideal templates for the construction of efficient porous nanozymes, in which abundant active sites were exposed and effective electron transfer was realized. , Co 3 O 4 derived from MOFs is expected to be an efficient catalase-like nanozyme, which can provide oxygen for GOx to oxidize glucose, cut off the nutrition supply of tumor, and enhance the effects of starvation therapy. The introduction of a secondary metal into the monometallic oxide counterpart is a common method to adjust its catalyst activity and size, which is important for biomedical applications. − Therefore, secondary metal doped Co 3 O 4 with an appropriate size may have a prospect in synergistic catalytic and starvation therapy.…”

“…21,22 The high surface area and high porosity of MOFs make them ideal templates for the construction of efficient porous nanozymes, in which abundant active sites were exposed and effective electron transfer was realized. 23,24 Co 3 O 4 derived from MOFs is expected to be an efficient catalase-like nanozyme, which can provide oxygen for GOx to oxidize glucose, cut off the nutrition supply of tumor, and enhance the effects of starvation therapy. The introduction of a secondary metal into the monometallic oxide counterpart is a common method to adjust its catalyst activity and size, which is important for biomedical applications.…”