Hydroxyapatite nanorods: a nanobiomaterial for chemical detection of aniline vapor
Hydroxyapatite nanorods: a nanobiomaterial for chemical detection of aniline vapor
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DOI：
10.1007/s13738-021-02300-1
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发表时间：
2021-06-12
影响因子：
2.4
通讯作者：
Song, Jia
中科院分区：
文献类型：
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作者：
Wang, Luyu;Wang, Bing;Song, Jia
对苯、甲苯、乙苯和二甲苯(BTEX)中的苯胺蒸气进行选择性化学检测仍然是一个挑战。在这里，我们特意设计了一种羟基磷灰石(HAP)纳米棒纳米生物材料修饰的石英晶体微天平传感器，用于高效检测苯胺/BTEX混合物中的苯胺。此外，在室温下，羟基磷灰石纳米棒对苯胺具有很好的灵敏度，相应的检测下限可以达到百万分之五(Ppb)。HAP纳米棒在传感过程中的稳定性也是令人满意的。理论基础和焓萃取实验揭示了其传感机理是由于苯胺分子与HAP结构之间存在适度的酸碱吸附作用。根据定量测量数据，可以得到存在于湿空气(相对湿度为50-90%)中的水合物C6H7N中心点βH2O的分子式为C6H7N中心点1.36，类似于1.93H(2)O。
Selective chemical detection of aniline vapor from benzene, toluene, ethylbenzene, and xylene (BTEX) is still a challenge. Here, we deliberately design a hydroxyapatite (HAP) nanorods nanobiomaterial modifying on the quartz crystal microbalance transducer for highly efficient detection of aniline from aniline/BTEX mixture. Besides, at room temperature, HAP nanorods perform excellent sensitivity of aniline, and the corresponding detection limit can reach down to 5 part per billion (ppb). The stability of HAP nanorods in the sensing process is also satisfactory. The sensing mechanism, as unveiled by the theoretical basis and the enthalpy extraction experiment, is due to the moderate acid-base absorptive interaction between aniline molecule and the HAP structure. The molecular formula of hydrate C6H7N center dot beta H2O existing in wet air (with 50-90% relative humidity) can be obtained as C6H7N center dot 1.36 similar to 1.93H(2)O based on quantitatively measurement data.