Performance of metal-organic framework MIL-101 after surfactant modification in the extraction of endocrine disrupting chemicals from environmental water samples

Comparative research on three types of MIL-101(Cr)-SO3H for esterification of cyclohexene with formic acid

“…MIL-101(Cr) has higher specic surface area and larger pore volume than other MOFs, and it overcomes the disadvantages of poor thermal and chemical stability of other MOFs, [23][24][25] which make it a focus. Huang et al 26 synthesized MIL-101(Cr) by NaAC as mineralizer, and discovered that it had better thermostability than prepared by HF as mineralizer.…”

“…According to that MIL-101(Cr) 23,26 can be prepared by different mineralizers and resulted in different performance, we synthesized MIL-101(Cr)-SO 3 H by HF, NaAC as mineralizer, respectively. In addition, George Akiyama prepared MIL-101(Cr)-SO 3 H using HCl as mineralizer, which showed high durability to boiling water and distinct and clean catalytic activity for the cellulose hydrolysis reaction, with a strong Brønsted acid site on its pore surface.…”

Recent applications of metal–organic frameworks in sample pretreatment

“…In addition, the hydrophobicity of some water-stable MOFs prohibit them from making contact with aqueous sample completely and lead to poor adsorption to hydrophilic compounds. Therefore, sometimes water-stable MOFs also need to be functionalized mainly for the following reasons: [49] or introduction of surfactant to MIL-101 was aimed at better dispersibility of MIL-101 in aqueous samples [50]. As for applications of water-stable MOFs in SPME, the main task is to avoid the stripping of the coatings from SPME fiber.…”

“…Introduction of surfactant to MOFs is an effective way to improve dispersibility of MIL‐101 in aqueous matrix. The MIL‐101‐decorated Tritox‐114, a kind of surfactant, was applied to enrich EDCs from water sample with low LODs (0.006–0.023 ng/mL), acceptable precision (RSDs: 2.2–13%), and good linearity from 0.09 to 45 ng/mL ( R 2 > 0.9980) .…”

Polypyrrole‐coated alginate/magnetite nanoparticles composite sorbent for the extraction of endocrine‐disrupting compounds

“…Therefore, it is important to develop reliable, simple, rapid and highly sensitive methods for monitoring EDCs in environmental samples. Several chromatographic techniques have been reported for the determination of EDCs including HPLC , GC , and CE . However, the use of the GC technique usually requires a tedious derivatization process, while the CE techniques lack stability and sensitivity for real samples.…”