The metal-incorporated mesoporous carbon with high performance in capture and degradation of volatile nitrosamines

Effective nitrosamines trap derived from the in situ carbonized mesoporous silica MCM-41

“…As the accumulated amount of NPYR reached 1.37 mmol g −1 , the difference among these carbonized materials was more obvious and the sample of AM-773 still possessed the highest capability. This result is not unexpected because AM-773 possessed the microporous feature of MCM-41 as aforementioned along with the specific performance of carbon modifier, and these features are known to be profitable for capturing volatile nitrosamines [14,18]. For an overall analysis of these adsorption isotherms, they were fitted with Freundlich equation [18], in which the exponent of 1 < n < 10 indicates the favorable nature of adsorbent-NPYR system ( Table 2).…”

“…On the other hand, the value of temperature T max , at which the maximum value of nitrogen oxide products emerged, is the same (493 K) on all of the porous samples (Table 1). This phenomenon indicates the helpless of carbon modification on MCM-41 toward the degradation of volatile nitrosamines, because NPYR will be decomposed at the lower temperature if the modifier improves the catalytic function of the composite [14,17]. In order to evaluate the selective adsorption of carbonized MCM-41 samples in complex system, these composites were added into cigarette filter as a triple segment model to trap the nitrosamines in the mainstream smoke and Fig.…”

“…Thirdly, the carbon derived from the in situ carbonization of the template micelles cannot fill the whole channel but distribute inside the channel to change the surface curve of the pore wall, and the existence of carbonous particles in the channel will enlarge the adsorbate-adsorbent collision probability, which is profitable for the resulting composite to adsorb tiny molecules. We have tried this new preparative route in SBA-15, and the carbonized sample really exhibited a better performance than the parent SBA-15 in the adsorption and catalytic decomposition of volatile nitrosamines [14]. Here we try to extend this attempt to MCM-41 because the as-synthesized MCM-41, prepared with the direction of CTAB (cetyltrimethylammonium bromide, ionic surfactant), has two differences in comparison with the as- synthesized SBA-15: the first, the ionic surfactants CTAB have a stronger interaction with silica wall than the amphiphilic block copolymers in SBA-15.…”

The influence of mesoporous silica modified with phosphorus and nitrogen‐containing hyperbranched molecules on thermal stability, combustion behavior, and toxic volatiles of epoxy resin

“…Recently, nanoparticles brought a revolution in the field of flame retardant research. Because of a unique mesoporous structure and larger specific surface area, mesoporous silica exhibits a great advantage in eliminating the toxic products formed during the combustion process . Jiang et al prepare HM‐SiO 2 hybrids and mix them with EP to reduce the amount of toxic effluents during the combustion of EP .…”

Synthesis and magnetic properties of iron nanoparticles confined in highly ordered mesoporous carbons

“…Nevertheless, the above routes are fussy, time-consuming and high cost multi-step synthesis procedures, including repeated impregnation with carbon and metal precursors and the removal of hard templates [23]. Meanwhile, the mesoporous materials containing Fe, Co, Ni magnetic nanoparticles have fascinating magnetic properties, and many applications including magnetic storage media, ferrofluids, and as magnetic carriers for drug targeting [36,[39][40][41][42]. Yao highly ordered Fe/OMCs using a soft templating route [24].…”