ZnO/mesoporous silica nanocomposites prepared by the reverse micelle and the colloidal methods: Photoluminescent properties and quantum size effect

SBA-15 mesoporous silica coated with macrocyclic calix[4]arene derivatives: Solid extraction phases for heavy transition metal ions

“…Grafting method consists of reaction of a suitable organosilane with surface silanol groups using an appropriate solvent under reflux conditions [7], where its most apparent advantage is to well preserve the mesostructure after post-modification [9,10]. Actually, many of these investigations have utilized periodic mesoporous silicas, including HMS, MCM-41, MCM-48, SBA-15 or CMI-1 as the inorganic matrix [7,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Among them, SBA-15 materials show attractive properties due to its large pore size (from 10 nm to over 30 nm) and improved thermal and hydrothermal stability.…”

Fl–DFO molecules@mesoporous silica materials: Highly sensitive and selective nanosensor for dosing with iron ions

“…Ordered periodic micro-, meso-and macro-porous materials allow the construction of composites with many guest types, e.g. organic molecules, inorganic ions, semiconductor clusters or polymers [55][56][57][58][59][60][61]. In literature, several proposals were already made to use such mesoporous systems as optical materials and as highly specific chemical sensors for trapping and detection of heavy metal ions [62][63][64][65][66][67].…”

Size and defect related broadening of photoluminescence spectra in ZnO:Si nanocomposite films

“…Thus it becomes clear that the compositional ratio of ZnO to Silicon which inturn means the neighbourhood offered to ZnO nanoparticles is deterimental in bringing desired changes in optical properties of the nanocomposites and should be given its due concern. Nanocomposites based on ZnO and Si have been fabricated by sol gel [15,16,17,18,19], RF sputtering [20,21,22,23], pulsed laser deposition [24], via chemical routes [25,26,27,28], reverse micelle method [29]and their optical properties studied. These research calls for more systematic work to optimize the parameteres for tailoring the properties and for a better understanding of interface and defect mechanism of ZnO:Si nanocomposites Hence to this effect, we have started systematic study of Zinc Oxide grains in nano regime embedded in amorphous Silicon matrix.…”