Hierarchical tetrazolium-based hyper-crosslinked polymer for rapid nitrophenol removal from wastewater

Adsorptive Removal of Nitrophenols from Water by Biomass-Derived Carbon Nano-Onions

“…53 The change in the position of the O−H peak after the adsorption of nitrophenols shows that hydrogen-bonding interactions occur between CNOs and nitrophenols. 54 According to these observations, it can be concluded that nitrophenols adsorb onto the CNO surface via H-bonding and π−π interaction, which strongly support the adsorption mechanism (Figure 8b). The adsorption capacity (mg g −1 ) of CNOs for 2-NP, 3-NP, and 4-NP was found to be significantly higher than that of previously reported materials, as indicated in Table S1.…”

“…Furthermore, the position of the benzene skeleton vibration peaks in CNOs + nitrophenols differs from those in CNOs and nitrophenols, demonstrating that π–π interaction arises between the CNOs and nitrophenols, which means that the π-electron region of the aromatic structures of CNOs interacts with the electron-acceptor aromatic ring of nitrophenols via π–π interactions . The change in the position of the O–H peak after the adsorption of nitrophenols shows that hydrogen-bonding interactions occur between CNOs and nitrophenols . According to these observations, it can be concluded that nitrophenols adsorb onto the CNO surface via H-bonding and π–π interaction, which strongly support the adsorption mechanism (Figure b).…”

A Thermally Promoted Homogenous‐Floating‐Concentrating Strategy Synthesizing Highly Crystalline Triazine/hydroxyl‐Rich COFs for 4‐Nitrophenol Adsorption

“…[4][5][6][7] It has been listed as toxic chemicals by USEPA due to its severe toxicity and high environmental stability. [4][5][6][7][8][9][10] During past decades, a variety of porous materials have been developed for 4-NP adsorption from wastewater, such as graphene oxide-montmorillonite nanocomposite, [11] porous organic polymers, [12,13] porous carbon, [5] and metal organic frameworks. [14,15] However, the performance and reusability of these documented adsorbents DOI: 10.1002/marc.202200786 is far from practical applications, therefore, the preparation of high-performance adsorbents still keeps challenging.…”