Regulating energy band structures of triazine covalent organic frameworks with electron-donating/withdrawing substituents for visible-light-responsive photocatalytic tetracycline degradation and Cr(VI) reduction

Internal Electric Field‐Modulated Charge Migration Behavior in MoS2/MIL‐53(Fe) S‐Scheme Heterojunction for Boosting Visible‐Light‐Driven Photocatalytic Chlorinated Antibiotics Degradation

“…Ethylenediaminetetraacetic acid disodium salt (EDTA‐2Na) exhibited a strong affinity with the photo‐generated holes. [ 63 ] After adding 0.5, 1, and 2 m m of EDTA‐2Na, the CAP degradation rate was inhibited to 22.6%, 12.3%, and 10.5%, respectively (Figure S14e, Supporting Information). Therefore, the direct oxidation and the •OH generation process were affected by adding EDTA‐2Na.…”

Highly porous BiOBr@NU-1000 Z-scheme heterojunctions for synergistic efficient adsorption and photocatalytic degradation of tetracycline

“…6a). 50,51 2,2,6,6-Tetramethylpiperidine (TEMPO) was used to capture singlet oxygen ( 1 O 2 ). When exposed to visible light, the TEMPO- 1 O 2 signal peak produced by BMU-2 was detected, and the intensity of the signal peak increased with a longer illumination time.…”

Boosting Exciton Dissociation and Charge Transfer in Triazole-Based Covalent Organic Frameworks by Increasing the Donor Unit from One to Two for the Efficient Photocatalytic Elimination of Emerging Contaminants

“…33 The observations clearly indicated the The peaks at ∼1251 and ∼1570 cm −1 in the FT-IR spectra (Figure 1d) corresponded to the C−N and C�C in the skeleton of both COFs, respectively. 34 The solid 13 C NMR spectra (Figure 1e) further revealed the organic structures of two COFs. Specifically, the chemical shifts at 100.9 and 154.6 ppm in the 13 C NMR spectra of COF-DT could be assigned to C atoms in triazole rings, while the peaks at 101.2 and 156.2 ppm observed in 13 C NMR spectra of COF-DBT could be attributed to C atoms in bis-triazole (Figure 1e).…”

“…34 The solid 13 C NMR spectra (Figure 1e) further revealed the organic structures of two COFs. Specifically, the chemical shifts at 100.9 and 154.6 ppm in the 13 C NMR spectra of COF-DT could be assigned to C atoms in triazole rings, while the peaks at 101.2 and 156.2 ppm observed in 13 C NMR spectra of COF-DBT could be attributed to C atoms in bis-triazole (Figure 1e). 34 The signals at ∼107, ∼149, and ∼184 ppm present in the NMR spectra for both COFs could be assigned to the C atoms in the βketoenamine structure.…”

“…Various metal-based , and metal-free, particularly carbon-based, photocatalysts , have been fabricated to degrade emerging organic contaminants and disinfect bacteria under visible-light/solar irradiation. Due to its structural designability, the covalent organic framework (COF) has recently been recognized as one type of novel photocatalyst with the potential to eliminate pollutants in water. , Compared with common carbon-based materials, the π–π lamellar structure, large surface areas, and regular open channels within COFs are beneficial for the diffusion of charges to facilitate the photocatalysis reaction . However, without tuning its intermolecular structure during the fabrication process, the dissociation of excitons in COFs would also be insufficient, constraining their photocatalytic degradation activity. , …”