Zinc hydroxyapatite catalyst for decomposition of 2-propanol

• Main Authors: Low, Hou Ran, Avdeev, Maxim, Ramesh, Kanaparthi, White, Timothy John
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2013
• Online Access: https://hdl.handle.net/10356/97147; http://hdl.handle.net/10220/10654
• Institution: Nanyang Technological University

Hydroxyapatite (HAp) is attracting interest as a heterogeneous catalyst due to its “zeolitic” properties that allow tailoring of chemically active surface sites for specific applications. Here, the crystallographic modification of HAp through incorporation of zinc (Zn2+) was studied using diffraction and spectroscopic techniques. The preferential displacement of tunnel calcium (Ca2+) by covalently bonded Zn2+ inhibits crystal growth and promotes the retention of an amorphous (10-20 wt%) component. In combination, these factors create chemically active surfaces that allow Zn-HAp materials to effectively absorb carbon monoxide (*characteristic vibration at ∼1711 cm-1) and catalyze the decomposition of 2-propanol.