Construction of heterostructured MIL-125/Ag/g-C3N4 nanocomposite as an efficient bifunctional visible light photocatalyst for the organic oxidation and reduction reactions

Facile Preparation of Metal-Organic Framework (MIL-125)/Chitosan Beads for Adsorption of Pb(II) from Aqueous Solutions

“…The XRD patterns of pure MIL-125 and MIL-125-CS are shown in Figure 5 . The diffraction peaks of MIL-125 are consistent with those reported in previous studies [ 30 ], which indicated that MIL-125 was prepared successfully. In addition, the XRD pattern of MIL-125-CS was almost the same as that of MIL-125, except for a few changes in the (20.2) diffraction, which may correspond to –NH 2 , and this similarity was due to the fact that CS and MIL-125 have polymerized and that the structure of MIL-125 had not changed.…”

Biogenic Hierarchical MIL‐125/TiO2@SiO2 Derived from Rice Husk and Enhanced Photocatalytic Properties for Dye Degradation

“…It can be seen diffraction patterns of S1, S2 and S3 are nearly the same as that of MIL‐125(Ti) which presents characteristic bands of carboxylate at 1380 and 1600 cm −1 . Characteristic absorption of benzene rings is located at 1013 and 740 cm −1 . At 1730 cm −1 , a weak band corresponding to the TiO 2 surface adsorption was H 2 C 2 O 4 asymmetric stretching vibration.…”

“…Another is to improve light response range and quantum productivity properties of TiO 2 by constructing heterostructures , depositing metal , doping ions , or sensitizing by dyes . In particular, heterostructures demonstrate a great potential to promote photocatalytic performance because excited electron–hole pairs can be efficiently separated and charge carriers can easily transfer across the interface of the heterostructure to restrain recombinations . Zhang et al .…”

Catalytic Aerobic Oxidation of C(sp3)−H Bonds

“…Alternatively,m ediator radicals such as chlorine or hydroxyl radical can be generated in as imilar way and be used to abstract ah ydrogen atom from the substrate.B oth methods generate asubstrate radical which can be trapped by O 2 /O 2 C À resulting in the formation of oxygenated products.T he electron of the semiconductor gets captured by O 2 ,generating O 2 C À ,reverting the catalyst back to its original state.Graphitic carbon nitride (g-C 3 N 4 ), obtained by calcination of urea, was recently shown to be as uitable and recyclable photocatalyst in the oxidation of C(sp 3 ) À Hb onds. [138] Ag nanoparticles were used to increase the visible-light absorption, and to create an electron-conduction bridge between MIL-125(Ti) and g-C 3 N 4 to retard the recombination of charge-separated states.B oth Ag nanoparticles and g-C 3 N 4 absorb visible light and generate electrons and positive holes.T he photoinduced electrons migrate to MIL-125(Ti) and allow the reduction of Ti 4+ to Ti 3+ .O 2 C À is formed via electron transfer from Ti 3+ to O 2 . Carbon nanodots are nanoparticles that possess fluorescent properties that make them suitable photocatalysts.B enzylic, allylic,and even unactivated cyclic C(sp 3 )ÀHbonds could be oxidized with this protocol under mild conditions in at wophase system of substrate and water.…”