Novel amorphous functional materials for trapping nitrosamines.
Novel amorphous functional materials are designed to modify amorphous silica with alumina. They are first presented as efficient adsorbents to trap both volatile nitrosamines and bulky tobacco specific nitrosamines in the environment. Selective adsorption, temperature programmed surface reaction (TPSR), and FTIR methods are employed to study the impact of alumina modification on the ability of silica to adsorb and catalytically degrade nitrosamines. Due to the special interaction between the N-NO group of nitrosamines and the aluminum ion in the composite, nitrosamines can be very easily trapped by the composite. Moreover, this cost-efficient material first shows a remarkable adsorptive capability and catalytic activity in reduction of NNN (N-nitrosonornicotine) in the liquid phase. The new concept of designing a multifunctional trap for carcinogenic pollutants, which combines the amorphous silica's pore structure with the specific adsorbing/catalyzing features of metal ions, proves feasible.
Cao
Yi
Y
Department of Chemistry, Nanjing University, Nanjing 210093, China.
Shi
Li Ying
LY
Zhou
Chun Fang
CF
Yun
Zhi Yu
ZY
Wang
Ying
Y
Zhu
Jian Hua
JH
D000327:Adsorption; D000535:Aluminum / Q000032:analysis; D002273:Carcinogens / Q000032:analysis; D002384:Catalysis; D004784:Environmental Monitoring / Q000379:methods*; D007700:Kinetics; D009538:Nicotine / Q000032:analysis; D009584:Nitrogen / Q000737:chemistry; D009602:Nitrosamines / Q000032:analysis*; D012822:Silicon Dioxide / Q000032:analysis; D012906:Smoke; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013997:Time Factors; D014026:Nicotiana; D014961:X-Ray Diffraction
D002273:Carcinogens; D009602:Nitrosamines; D012906:Smoke; D009538:Nicotine; D012822:Silicon Dioxide; D000535:Aluminum; D009584:Nitrogen