Efficient adsorption of four phenolic compounds using a robust nanocomposite fabricated by confining 2D porous organic polymers in 3D anion exchangers

Relationship between Surface Hydroxyl Complexation and Equi-Acidity Point pH of MnO2 and Its Adsorption for Co2+ and Ni2+

“…FT-IR analysis of adsorbed δ 2 -MnO 2 was shown in Figure . It could be seen that the surface hydroxyl vibration peaks near 3400 and 1600 cm –1 were weakened, and new vibration peaks appeared at 2677.83 and 2067.37 cm –1 , indicating that Co 2+ and Ni 2+ complexed with hydroxyl on the surface of δ 2 -MnO 2 . The enhancement of vibration peak near 1000 cm –1 was due to the increase of adsorbed water on the MnO 2 surface.…”

“…It could be seen that the surface hydroxyl vibration peaks near 3400 and 1600 cm –1 were weakened, and new vibration peaks appeared at 2677.83 and 2067.37 cm –1 , indicating that Co 2+ and Ni 2+ complexed with hydroxyl on the surface of δ 2 -MnO 2 . 38 The enhancement of vibration peak near 1000 cm –1 was due to the increase of adsorbed water on the MnO 2 surface. The vibration peaks of the Mn–O lattice shift and increase near 500–600 cm –1 , which was caused by Mn 2+ adsorption on the δ-MnO 2 surface or Mn 3 O 4 and MnOOH generated by reaction.…”

Selective and Sensitive Recognition of Specific Types of Toxic Organic Pollutants with a Chemically Stable Highly Luminescent Porous Organic Polymer (POP)

“…Recently, the luminescent porous material based fluorescence technique for the detection of target-specific environmental contaminants has received special research attention, owing to its pre-concentration effect, high sensitivity, selectivity, reusability, low fabrication and operational costs, etc. − Compared to traditional porous materials, such as activated carbon, zeolites, and resin, advanced porous materials such as metal–organic frameworks (MOFs) and porous organic polymers (POPs) have recently been shown to be promising toward sensing application because of their improved sensitivity, high selectivity, and fast response. , Although several MOF-based antibiotic and pesticide sensing studies have been reported, − , the detection of these species with low-cost and thermally and chemically stable highly luminescent POPs is very rarely explored. , POPs are a class of porous materials constructed with strong covalent bonds between various pure organic building blocks as a potential scaffold, featuring highly tunable porosity and excellent chemical and thermal stability. − The successful development of such materials with the aforementioned properties along with rational incorporation of fluorophores also offers advantages toward construction of efficient sensory materials. The high porosity and large surface area of these materials allow fast mass diffusion and strong interaction of the probes with the targeted analytes and thus further result in rapid detection and sensitivity, respectively. − Moreover, the heterogeneous nature coupled with high chemical stability of these materials enables the easy and superior recyclable detection ability of these probes, making them useful for different environments. , …”

Evaluation of an Ionic Porous Organic Polymer for Water Remediation

“…Porous organic polymers (POPs) are a burgeoning type of porous materials with microporous or mesoporous structures formed by covalent bonding of organic structural units, which have clear advantages such as a large specific surface area, low skeleton density, good thermal stability and chemical stability, simple and diverse synthetic methods, and adjustable and designable pore properties. − These compounds have received wide attention due to their own characteristics and have excellent performance and potential application value in gas adsorption storage, − heterogeneous catalysis, − photovoltaic materials, − and chemical biosensors, − but they are relatively rarely used for removing ionic contaminants from water. , Ionic porous organic polymers (iPOPs) represent a small fraction of the POP family and are much less-explored than neutral POPs. − Recently, a series of iPOPs have been designed and synthesized, which show more excellent adsorption performance when removing inorganic ionic contaminants and organic ionic dyes in water because of the strong interaction between the adsorbent and the framework. − Performing anion capture by ion exchange, a cation network with exchangeable anions is a major requirement. Due to their structural diversity and chemical stability, cationic porous organic polymers are very suitable for capturing harmful anionic pollutants from water, while less directly synthesizing cationic POPs were reported to date for detection of anions in water. , Therefore, we report the novel ionic porous organic polymer QUST-iPOP-1, which was facilely synthesized by a one-step process from tri­(4-imidazolylphenyl)­amine and cyanuric chloride (Scheme ).…”