不同晶相羟基氧化铁的合成及选择性降低卷烟烟气中TSNAs的应用

Controllable preparation of Fe OOH with different crystal phases and its application on selective reduction of TSNAs in cigarette smoke

利用沉淀法原理,以二价铁离子为铁源,控制合成了3种不同晶相和结构的羟基氧化铁纳米材料,并对其降低卷烟烟气中4-(N-甲基亚硝胺)-1-(3-吡啶基)-1-丁酮(NNK)的释放量进行了研究。利用XRD、FT-IR、SEM等手段对材料进行了系统表征。将不同晶相和结构的材料添加到卷烟滤棒中,结果表明,FeOOH能明显选择性降低卷烟烟气中烟草特有亚硝胺,对代表性化合物NNK的选择性降低率最高可达25.03%,降低NNK释放量的相对顺序为δ-FeOOH>β-FeOOH>α-FeOOH,而且对不同亚硝胺分子的降低也有差异选择性。FT-IR分析结果表明,FeOOH与NNK分子之间存在化学键作用。

Based on the precipitation principle,three kinds of hydroxy ferric oxide nanomaterials(FeOOH)with different crystal phases and structures are synthesized with divalent ferric ion as iron source,which are used to reduce the content of 4-(N-methyl-nitrosamine)-1-(3-pyridyl)-1-butanone(NNK)in cigarette smoke.The prepared FeOOH materials are characterized by XRD,FT-IR and SEM,and the interaction of the materials adsorbing tobacco specific nitrosamine NNK is studied by infrared spectra.FeOOH with different crystal phases and structures are added into the cigarette filter rod as harm reduction materials.Results show that FeOOH can reduce obviously selectively tobacco specific nitrosamines in cigarette smoke,and shows selective differences on four kinds of non-volatile nitrosamines.The highest selectivity reduction rate to NNK can reach 25.03%.δ-FeOOH shows the largest ability in reducing NNK release amount in cigarette smoke,followed byβ-FeOOH and thenα-FeOOH.It is found by FT-IR there exists chemical bonding effect between molecular of FeOOH and NNK.