Raj, A. F. P. Allwin Mabes published the artcileRemoval of Pb2+, Cr3+ and Hg2+ ions from aqueous solutions using SiO2 and amino-functionalized SiO2 particles, Name: 3-(Trimethoxysilyl)propan-1-amine, the publication is Journal of Sol-Gel Science and Technology (2022), 103(1), 290-308, database is CAplus.
Herein we present silica (SiO2) and amino-functionalized SiO2 particles (NH2@SiO2) based on the Stober method involving the reaction of hydrolysis and condensation of alkoxide precursors tetraethoxysilane (TEOS), 3- (trimethoxysilylpropyl) diethylenetriamine (DETA) and (3-aminopropyl) trimethoxysilane (APTMS) for specific and selective removal of heavy metal ions such as Lead (Pb2+), Chromium (Cr3+) and Mercury (Hg2+). The prepared SiO2 and NH2@SiO2 particles were characterized by Fourier IR Spectroscopy (FTIR) spectroscopy, thermogravimetric anal. (TGA), sp. surface area (BET), transmission electron microscopy (TEM), zeta potential (¦Æ) measurements and potential titration measurements. We studied the adsorption efficiency toward heavy metal ions (Pb2+, Cr3+ and Hg2+) in model salt solutions The adsorption process was evaluated in terms of adsorption efficiency, adsorption capacity, adsorption isotherms, kinetics and thermodn. parameters and desorption efficiency based on the result of the at. absorption spectroscopy (AAS) measurements for Pb2+ and Cr3+ ions and inductively coupled plasma optical emission spectrometer (ICP-OES) measurements for Hg2+. The results showed the highest adsorption efficiency and capacity for heavy metal ions (Pb2+, Cr3+ and Hg2+) by NH2@SiO2 using APTMS. Furthermore, the adsorption efficiency was 99.3% for Pb2+, 98.4% in the case of Cr3+ ions and 88% for Hg2+. The adsorption process for Pb2+, Cr3+ and Hg2+ ions using non-functionalized SiO2 and NH2@SiO2 particles follows pseudo-second-order kinetics and is best described by the Langmuir adsorption model. The desorption results showed potential for reusing NH2@SiO2 particles with more than 91.8% desorbed Pb2+ ions using 0.1 M HCl and 100% desorbed Hg2+ ions using 1.5 M C6H8O7. Three alkoxide precursors (tetraethoxysilane (TEOS), 3-(trimethoxysilylpropyl), diethylenetriamine (DETA) and (3-aminopropyl) trimethoxysilane (APTMS)) were used in the one-pot synthesis of silica (SiO2) and amino-functionalized SiO2 (NH2@SiO2) particles. The prepared adsorbent materials were characterized and used for adsorption tests and desorption toward heavy metals ions (Pb2+, Cr3+ and Hg2+). Adsorption efficiency, adsorption capacity, adsorption isotherms, kinetics and thermodn. parameters were detected.
Journal of Sol-Gel Science and Technology published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C6H17NO3Si, Name: 3-(Trimethoxysilyl)propan-1-amine.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia