The mordenite（MOR） nanoparticles（MNPs）with ultra-small crystallites（~30 nm） were synthesized by using tetraethylammonium bromide（TEAB） as structure directing agent at low temperature（403K）. The formation of ...The mordenite（MOR） nanoparticles（MNPs）with ultra-small crystallites（~30 nm） were synthesized by using tetraethylammonium bromide（TEAB） as structure directing agent at low temperature（403K）. The formation of MNPs was considered to be due to high concentration of TEAB and occurrence of limiting Ostwald ripening at low temperature. The MNPs exhibited not only higher catalytic activity at low temperature for selective catalytic reduction of NOx but also higher catalytic activity and longer lifetime for disproportionation of toluene than conventional MOR（cMOR） bulk crystals.展开更多
Chiral Ag nanowires(CAg NWs), fabricated inside chiral carbon nanotubes(CCNTs), exhibit strong circular dichroism(CD) signals in the visible and near-IR regions. Enantiopure CCNTs were prepared by carbonization of the...Chiral Ag nanowires(CAg NWs), fabricated inside chiral carbon nanotubes(CCNTs), exhibit strong circular dichroism(CD) signals in the visible and near-IR regions. Enantiopure CCNTs were prepared by carbonization of the self-assembled chiral polypyrrole nanotubes according to our previous report. Ag ions could be easily introduced into the chiral pores of CCNTs due to the capillary phenomenon. After hydrogen reduction, the optically active CAg NWs formed inside the channels of the CCNTs. The helical channels in the CCNTs played a predominant effect on the chiral formation of the CAg NWs. This system provides new insight into the fabrication as well as the study of optical activity(OA) of chiral inorganic nanomaterials. Such novel chiral inorganic material will bring new opportunities in non-linear optics, biosensors and chiral recognition.展开更多
基金supported by the National Natural Science Foundation of China (21533002 and 21571128)the National Excellent Doctoral Dissertation of China (201454)the National Key R&D Program of China (2016YFC0205900)
文摘The mordenite（MOR） nanoparticles（MNPs）with ultra-small crystallites（~30 nm） were synthesized by using tetraethylammonium bromide（TEAB） as structure directing agent at low temperature（403K）. The formation of MNPs was considered to be due to high concentration of TEAB and occurrence of limiting Ostwald ripening at low temperature. The MNPs exhibited not only higher catalytic activity at low temperature for selective catalytic reduction of NOx but also higher catalytic activity and longer lifetime for disproportionation of toluene than conventional MOR（cMOR） bulk crystals.
基金supported by the National Natural Science Foundation of China (21471099)
文摘Chiral Ag nanowires(CAg NWs), fabricated inside chiral carbon nanotubes(CCNTs), exhibit strong circular dichroism(CD) signals in the visible and near-IR regions. Enantiopure CCNTs were prepared by carbonization of the self-assembled chiral polypyrrole nanotubes according to our previous report. Ag ions could be easily introduced into the chiral pores of CCNTs due to the capillary phenomenon. After hydrogen reduction, the optically active CAg NWs formed inside the channels of the CCNTs. The helical channels in the CCNTs played a predominant effect on the chiral formation of the CAg NWs. This system provides new insight into the fabrication as well as the study of optical activity(OA) of chiral inorganic nanomaterials. Such novel chiral inorganic material will bring new opportunities in non-linear optics, biosensors and chiral recognition.
