Amino-functionalized MCM-41 and MCM-48 for the removal of chromate and arsenate

Electrospun Nanofibrous Polyacrylonitrile/calixarene Mats: an Excellent Adsorbent for the Removal of Chromate Ions from Aqueous Solutions

“…1 H and 13 C NMR spectra were obtained using a Varian 400 MHz spectrometer operating at 400 MHz. The prepared nanofiber mats were characterized by using a Bruker Vertex 70 ATR-FTIR instrument.…”

“…[9][10][11][12] Considering that oxyanions are the main form of chromate existing in water, the adsorption capacity of chromate can be expected to improve by introducing cationic units onto the adsorbent surface, because of the static electrical interaction between oxyanions and positive component on the adsorbent surface. 13,14 Presence of the amino groups on the surface of adsorbents with various amino compounds is very effective route to prepare cationic adsorbents for the removing of the chromate ions. For instance, the chromate adsorption capacity of bare magnetic Fe 3 O 4 nanoparticles from the aqueous phase was effectively improved after they were coated with piperidine units containing protonable amino groups at lower pH values.…”

Synthesis and modification of a mesoporous material type MCM-41 by an amine for the adsorption of organic pollutants: anionic and cationic dyes

“…Since then, many research groups have patented new families of materials with different pore structures, pore sizes and synthesis methods: several methods are needed in the manufacturing process of new porous materials organized "MPO". At present, a new family of ordered mesoporous solids is very widely studied by many researchers from different horizons for various applications including adsorption [3,4] and catalysis. In the field of adsorption, mesoporous materials such as MCM-41, HMS, SBA-15, SBA-1 have been functionalized by various groups for the adsorption of metal ions and various organic pollutants (synthetic dyes) [5].…”

Schiff base complex of Cu immobilized on MCM-41 as reusable catalyst for efficient oxidative coupling of thiols and oxidation of sulfides using hydrogen peroxide

“…In this regard, nano materials have emerged as useful and sustainable alternatives to the immobilization of homogeneous catalysts [3] since, when the size of the support is decreased to the nanometer scale, the surface area is substantially increased, which is combined with excellent accessibility of the surface-bound catalytic sites [4]. Among the various nano materials, Inorganic nanoporous materials have recently been used in various fields, such as catalysis [5], adsorption [6], extraction [7], energy [8], drug delivery systems [9], and for their luminescent character [10], and especially in the isolation and recycling of expensive homogeneous catalysts [5]. Among them, mesoporous MCM-41 have been widely used as catalysts in many organic reactions because of some unique properties like as large specific surface area ([1000 m 2 /g), homogeneous hexagonal pore arrays with pore diameters between 1.5 and 10 nm, relatively hydrophobic nature, ease of functionalization, high thermal stability (900°C) and facile separation [11,12].…”