Effective nitrosamines trap derived from the in situ carbonized mesoporous silica MCM-41.
A new route to modify the mesoporous silica MCM-41 with carbon, using the inherent surfactant template in the as-synthesized sample as the carbon precursor, is reported in this article. Apart from the advantage of omitting energy and time required for removal of template, the resulting silica-carbon composites exhibit a high efficiency in adsorption and catalytic decomposition of N-nitrosopyrrolidine (NPYR), the typical carcinogenic pollutant in environment. The influence of carbonization temperature on the structure and performance of the resulting carbon-silica composite was investigated by use of XRD, N(2) adsorption-desorption, FTIR and TG-DSC techniques, and the instantaneous adsorption and the temperature-programmed surface reaction (TPSR) of NPYR as well as the reduction of nitrosamines level of cigarette smoke were also utilized to assess the actual function of these composites. The carbonization performed in the range of 773-973 K enabled the resulting composites to possess a higher activity than parent MCM-41 in eliminating volatile nitrosamines, which is beneficial for controlling carcinogenic pollutants in environment.
Yang
Jia Yuan
JY
Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry and Chemical Engineering, Nanjing University, 22 Hankou Road, Gu-lou, Nanjing, Jiangsu 210093, China.
Yang
Jing
J
Zhou
Yu
Y
Lin
Wei Gang
WG
Wang
Hong Ji
HJ
Zhu
Jian Hua
JH
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002274:Carcinogens, Environmental / Q000302:isolation & purification*; D002384:Catalysis; D006358:Hot Temperature; D009242:N-Nitrosopyrrolidine / Q000302:isolation & purification; D009602:Nitrosamines / Q000302:isolation & purification*; D012822:Silicon Dioxide / Q000737:chemistry*
D002274:Carcinogens, Environmental; C509968:MCM-41; D009602:Nitrosamines; D002244:Carbon; D012822:Silicon Dioxide; D009242:N-Nitrosopyrrolidine