Post synthetic modification of magnetite @MIL-53(Fe)-NH ₂ core-shell nanocomposite for magnetic solid phase extraction of ultra-trace Pd(II) ions from real samples

Polyaniline‐co‐polyindole functionalized magnetic porous carbon derived from MIL‐53(Fe) for separation/enrichment of nitrophenols pollutants before determination with high‐performance liquid chromatography‐ultraviolet detection

“…To characterize the functional moieties of the MMIL‐53(Fe) and MPCN@PANI‐PIn nano‐material, their FT‐IR spectra of them were recorded (Figure S1, ESM). The absorption peaks at 579 cm ‐1 (Fe‐O), 1373 cm ‐1 (C‐O‐C), 1709 cm ‐1 (C = O), and 3325 cm ‐1 (O‐H) confirm the fabrication of MMIL‐53(Fe) [12]. In the spectrum of MPCN@PANI‐PIn, the absorption bands were observed at 582 cm ‐1 (Fe‐O), 1305‐1436 cm ‐1 (C‐N), 1554 cm ‐1 (C = N), and 3397 cm ‐1 (N‐H) [25].…”

“…In brief, MNPs were synthesized according to our previous work [21]. Afterward, magnetic MIL-53(Fe) was synthesized by the addition of MNPs, terephthalic acid, and FeCl 3 to the reaction medium [12,22]. In this way, 0.3 g MNPs were dispersed in 15 ml DMF, and then 3.0 mmol H 2 BDC was added to the mixture, and it was subjected to ultrasound radiation for 25 min.…”

“…After that, 3.0 mmol FeCl 3 was dissolved in 5 ml DMF. The two mixture was then transferred into a Teflon-lined stainless-steel autoclave, and the reaction was performed at 150 ο C for 2.5 h, and then the temperature went down to ambient temperature overnight [12,23]. The fabricated magnetic MMIL-53(Fe) was washed with water and ethanol (5 × 25 ml) to discard impurities, and then dried at 70 ο C for 18 h. Thereafter, the MMIL-53(Fe) was pyrolyzed at 600 ο C for 2 h under nitrogen protection to obtain MPCN [7].…”

“…Metal-organic frameworks (MOFs) are a class of crystalline porous nano-materials with the excellent physiochemical features such as very high surface area, adjustable pore-size, permanent nanoscale porosities, and uniform nanoscale pore structure [12,13]. In this regards, various MOF-based adsorbents have been utilized in the sample preparation process [14][15][16][17][18][19][20].…”

Recovery of Palladium from Acidic Solution Using Polyethylenimine-Crosslinked Calcium Silicate Hydrate Derived from Oyster Shell Waste: Adsorption and Mechanisms

“…The Langmuir and Sips models had greater coefficient of determination ( R 2 ) values than the other models, indicating that they were more suited to explain the adsorption of PEI-CSH for Pd(II) [6]. According to the Langmuir model, PEI-CSH was adsorbed on Pd(II) in a monolayer [43].…”