Kawai Takahiro, Ohtsuki Chikara, Kamitakahara Masanobu, Tanihara Masao, Miyazaki Toshiki, Sakaguchi Yoshimitsu, Konagaya Shigeji
Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan.
Environ Sci Technol. 2006 Jul 1;40(13):4281-5. doi: 10.1021/es050098n.
Some harmful volatile organic compounds (VOCs), such as formaldehyde, are regulated atmospheric pollutants. Therefore, development of a material to remove these VOCs is required. We focused on hydroxyapatite, which had been biomimetically coated on a polyamide film, as an adsorbent and found that formaldehyde was successfully removed by this adsorbent. The amount of formaldehyde adsorbed increased with the area of the polyamide film occupied by hydroxyapatite. The amount of adsorbed formaldehyde and its rate of adsorption were larger for hydroxyapatite deposited on polyamide film than for the commercially available calcined hydroxyapatite powder. This high adsorption ability is achieved by the use of nanosized particles of hydroxyapatite with low crystallinity and containing a large number of active surface sites. Therefore, hydroxyapatite biomimetically coated on organic substrates can become a candidate material for removing harmful VOCs such as formaldehyde.
一些有害的挥发性有机化合物（VOCs），如甲醛，是受管制的大气污染物。因此，需要开发一种去除这些VOCs的材料。我们将重点放在了通过仿生法涂覆在聚酰胺薄膜上的羟基磷灰石作为吸附剂上，并发现这种吸附剂能够成功去除甲醛。甲醛的吸附量随着羟基磷灰石在聚酰胺薄膜上所占面积的增加而增加。与市售的煅烧羟基磷灰石粉末相比，沉积在聚酰胺薄膜上的羟基磷灰石对甲醛的吸附量及其吸附速率更大。这种高吸附能力是通过使用具有低结晶度且含有大量活性表面位点的纳米级羟基磷灰石颗粒实现的。因此，仿生涂覆在有机基材上的羟基磷灰石可以成为去除甲醛等有害VOCs的候选材料。
