A highly fluorine-functionalized 2D covalent organic framework for promoting photocatalytic hydrogen evolution

NH2-UiO-66 Coated with Two-Dimensional Covalent Organic Frameworks: High Stability and Photocatalytic Activity

“…Photoelectrochemical measurements were performed using the apparatus and methods described in our previous work . The apparent quantum efficiency (AQE) was measured as follows: the photocatalyst (100 mg) was added into the photocatalysis reaction system.…”

“…Photoelectrochemical measurements were performed using the apparatus and methods described in our previous work. 60 The apparent quantum efficiency (AQE) was measured as follows: the photocatalyst (100 mg) was added into the photocatalysis reaction system. The amount of H 2 evolution was analyzed by gas chromatography and the photons were measured using a photodiode power sensor (ThorLabs S120C).…”

Fluoro-Substituted Covalent Organic Framework Particles Anchored on TiO2 Nanotube Arrays for Photoelectrochemical Determination of Dopamine

“…Nevertheless, the weak diffraction peaks at 4.80 and 7.24° and a broad peak at 18.55° indicate the low crystallinity of H-COF (Figure S2). The difference in crystallinity between F-COF and H-COF may be caused by the difference in electrophilicity and activity. , The H-COF/TiO 2 NTA and F-COF/TiO 2 NTA display similar diffraction peaks to TiO 2 NTA, suggesting that the modification with H-COF or F-COF does not change the crystalline structure of TiO 2 NTA. The absence of characteristic peaks of H-COF and F-COF in H-COF/TiO 2 NTA and F-COF/TiO 2 NTA is possibly caused by the small amount of COFs loaded on the TiO 2 NTA and the poor crystallinity due to the rapid growth of COFs by precipitating …”

“…Furthermore, COFs are expected to be ideal for DA detection as they have large surface areas and form strong π–π interactions with the aromatic rings of DA . Recently, several studies have shown that fluoro-substituted COFs have improved structure stability and photophysical properties due to the formation of strong C–F bonds (∼480 kJ/mol). − It was reported that the absorption capacity of light can be improved by reducing the band gap in fluorinated organic semiconductors. − COF/TiO 2 composites have been synthesized and used in multiple applications. For example, Lu et al fabricated the TiO 2 nanobelts@COF nanocomposites by a seed growth method, which was applied in photo-oxidation of benzyl alcohol .…”

Structure evolution of thiophene-containing conjugated polymer photocatalysts for high-efficiency photocatalytic hydrogen production

“…S9). Although the photocatalytic stability of PyTP-2 is less than that of the state-of-art polymer photocatalysts [50][51][52], the HER of 17.5 mmol h −1 g −1 of PyTP-2 after 24 h photocatalytic reaction is still much higher than that of most reported polymer photocatalysts [53][54][55]. The structure characterizations of the recovered sample of PyTP-2 after 24 h photocatalytic reaction demonstrate that no any obvious change in the chemical structure could be observed, as evidenced by the results of FT-IR and solid state 13 C NMR (Fig.…”