Mesoporous amine functionalized SiO2 supported Cu nanocatalyst and a kinetic-mechanistic degradation study of azo dyes

Layer‐by‐layer preparation of electromagnetic NH2‐SiO2/polypyrrole/Ni nanocomposites, characterization and their electrochemical properties

“…The FTIR spectrum of mesoporous H 2 N‐SiO 2 seed particles shown in Fig. 2(Aa) revealed the presence of symmetric and asymmetric stretching vibrations for SiO, SiOH, SiOSi and OSiO groups at around 1088, 970, 781 and 479 cm −1 , respectively 68,69 . NH bending vibration due to primary amine appears at 1640 cm −1 .…”

Impact of mesoporous SiO2 support for Ni/polypyrrole nanocomposite particles on their capacitive performance

“…1Ab) shows the asymmetric vibrations of the Si–O, Si–OH, Si–O–Si and O–Si–O groups at 1087, 970, 796 and 468 cm −1 , respectively. 50,51 The weak signal in the range between 2800 and 2900 cm −1 arises from the aliphatic C–H groups of residual CTAB and bonded HMDA. The broad band at 3000–3700 cm −1 corresponds to the cumulative asymmetric and symmetric stretching vibrations of –NH 2 and –OH groups.…”

“…A slightly modified sol–gel method was used for the preparation of H 2 N-SiO 2 core particles. 50,82 Briefly, 25 wt% CTAB (14.1817 g) solution was taken in a three necked round bottom flask with concomitant addition of H 2 O (87.0 g), ethanol (24.50 g) and DEA (0.2727 g). The reaction mixture was placed in a thermostat hot water bath maintained at 60 °C.…”

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

“…The solid supports help to maintain the size, shape, morphology of nanocatalysts and also limit the leaching of metal ions favorable for achieving durable and enhanced catalytic performance. The solid supports used prominently include graphene, 11,12 Zeolite, 13 Cellulose, [14][15][16] activated coke/carbon, 17,18 Sepiolite, 19 bentonite, 20 SiO 2 , 21,22 Al 2 O 3 23,24 etc. In general, the preparation of supported nanocatalysts is usually followed in two steps.…”