Product: STT COF
Synonyms: 3-Cyclobutene-1,2-dione, 3,4-dihydroxy-, polymer with 4,4′,4′′-(1,3,5-triazine-2,4,6-triyl)tris[benzenamine]
CAS: 2988741-18-8
Basic Information
| Unit MF. | C21H18N6.C4H2O4 | Unit MW. | 468.4641 | ||
| Coordination Metal | None | Linkers |
1) Squaric acid (SQ); |
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| Pore Size | ~2.5 nm | Pore Volume | |||
| Surface Area | 217.9 m2/g | ||||
| Analog Structure | |||||
Product Property
| Appearance | Orange powder | |||
| Particle Size | Nanorod structure: length ~1 μm, diameter ~200 nm (observed by SEM/TEM) | |||
Stability
1) Solution stability: Efficiently produces H2O2 in pure water, tap water, seawater, and Pearl River water; no obvious structural change after recycling (verified by PXRD and FTIR); low H2O2 decomposition rate.
2) Thermal stability: Thermogravimetric analysis (TGA) shows stability below 300°C without obvious thermal decomposition; O2 temperature-programmed desorption (O2-TPD) test is compatible with this temperature range.
2) Thermal stability: Thermogravimetric analysis (TGA) shows stability below 300°C without obvious thermal decomposition; O2 temperature-programmed desorption (O2-TPD) test is compatible with this temperature range.
Preservation
1) Store in a dry, sealed container at room temperature; avoid humid environments to prevent affecting proton adsorption performance.
2) It is recommended to activate the sample in a vacuum oven at 60°C overnight before use (referring to post-synthesis treatment steps) to remove adsorbed impurities and moisture.
Other Features
1) Fluorescence: Steady-state photoluminescence (PL) spectrum shows fluorescence emission, but adsorption and emission wavelengths are not specifically mentioned; time-resolved photoluminescence (TRPL) average lifetime is 0.787 ns.
2) Photoelectric properties: Band gap of 1.97 eV; conduction band (CB) edge at -0.46 V (vs. NHE), favorable for oxygen reduction reaction; higher photocurrent density than PTT COF and lower charge transfer resistance.
3) Zwitterionic property: Contains equimolar positive and negative charge groups; undergoes spontaneous hydrogenation to form C-OH sites, promoting proton supply and Yeager-type O2 adsorption.
2) Photoelectric properties: Band gap of 1.97 eV; conduction band (CB) edge at -0.46 V (vs. NHE), favorable for oxygen reduction reaction; higher photocurrent density than PTT COF and lower charge transfer resistance.
3) Zwitterionic property: Contains equimolar positive and negative charge groups; undergoes spontaneous hydrogenation to form C-OH sites, promoting proton supply and Yeager-type O2 adsorption.
Applications
1) Photocatalytic H2O2 production: Yield of 14356.5 μmol g-1 h-1 in pure water; AQY of 40.0% at 420 nm, applicable for in-situ Fenton reaction.
2) Pollutant degradation: Produced H2O2 can directly degrade organic pollutants such as methyl blue and bisphenol A, compatible with various water sources.
3) Continuous flow reaction: In a continuous flow membrane reactor integrated with gas diffusion layers, 5 L of H2O2 solution (400 μM) can be produced under natural sunlight.
2) Pollutant degradation: Produced H2O2 can directly degrade organic pollutants such as methyl blue and bisphenol A, compatible with various water sources.
3) Continuous flow reaction: In a continuous flow membrane reactor integrated with gas diffusion layers, 5 L of H2O2 solution (400 μM) can be produced under natural sunlight.
Characterizations
References
1) Liu, Chenchen; Liu, Xueming; Chen, Bing; Li, Zifan; Ou, Xinwen; Lu, Yaobin; Liu, Yuhao; Wu, Chongbei; Yao, Shan; Liu, Yunhai; Ye, Liqun; Han, Bin; Yang, Zhifeng; Nature Communications, 2025, 16(1), 8941, DOI: 10.1038/s41467-025-63997-9; Squaric acid-based zwitterionic covalent organic framework induces triple synergy for boosted hydrogen peroxide photosynthesis;
