Synthesis, characterization, and sorption properties of silica gel-immobilized Schiff base derivative

The immobilization of 3-(chloropropyl)triethoxysilane onto silica by a simple one-pot synthesis

“…The increase in these values confirmed that CPTES was incorporated onto the RHA silica to form RHACCl. Similar conclusion was made by Brunel [15] and Gbbük et al [16]. The BET adsorption isotherm obtained for RHACCl is shown in Fig.…”

Solid phase extraction using silica gel modified with azo-dyes derivative for preconcentration and separation of Th(IV) ions from aqueous solutions

“…This value confirmed that CPMS reacts with activated silica gel and organic molecule is covalently bonded on this surface [18,34,47].…”

“…The broad and strong band observed at 3436 cm -1 is due to the stretching vibration of H-bonded silanol group m(-Si-OH) along with H-OH vibration of the water molecules m(-OH) adsorbed The spectrum of the modified silica displays almost same characteristic bands of free silica with some changes; for example, the intensity of the free silanol group at 966 cm -1 was decreased and it almost disappeared in the amino modified silica (SiCPMS) (Fig. 2) [18,[47][48][49][50][51][52]. The bands observed at 1100 and 806 cm -1 represent the Si-O-Si groups and the deforming and bending modes of the Si-O-Si bond, respectively.…”

“…FTIR spectra are the most widely used tool to identify functional groups in a molecule and obtain structural and bond information on a complex [18,[47][48][49][50][51][52]. The adsorbent was characterized by FTIR spectroscopic analysis before and after the modification process (Fig.…”

Synthesized of Sporopollenin-Immobilized Schiff Bases and Their Vanadium(IV) Sorption Studies

“…The good application of both models implied that besides adsorption onto specific sorption sites through chemical interactions such as surface complexation and cation bridging, sorbate-sorbate interaction may also play an important role in the sorption process by sorbents. Thus, the Freundlich and the Langmuir isotherms are the most suitable equations to describe the adsorption equilibrium of V(IV) onto modified surfaces at 25°C [30].…”