Controlling size and shape of Zn-Al-PAB layered double hydroxide

Main Author: , Roto, Iqmal Tahir, Mustofa
Format: Article NonPeerReviewed
Terbitan: [Yogyakarta] : Fak. MIPA Universitas Gadjah Mada , 2007
Online Access: https://repository.ugm.ac.id/93952/
http://repository.ugm.ac.id/digitasi/index.php?module=cari_hasil_full&idbuku=1751
Daftar Isi:
  • <p>In the recent years nanosize layered double hydroxide materials have been extensively prepared and studied for many future applications. In this contribution, Zn-Al-PAB layered double hydroxide (PAB=para amino benzoate) with wide range particle size and various shape is reported. Para amino benzoate acid is one of the sunscreen compounds. Zn-Al-PAB with particle size in the range of 100-200 nm and spherical shape can be prepared using reactants of zinc chloride, aluminium chloride and sodium para amino benzoate. Zn-Al-PAB that has larger particle size of 300-500 nm with cubic shape is obtained when zinc nitrate and aluminium nitrate are used. If zinc sulphate and aluminium sulphate are used, much larger particle size of 700-900 nm with turbine-like shape is yielded. During the nucleation process, chloride, nitrate and sulphate in the solution help control the shape and size of Zn-Al-PAB LDH. Hydration number of the anions is believed to be responsible for the growth of the Zn-Al-PAB LDH aggregate that will affect the size. Large hydration number of anion will set barrier for Zn-Al-PAB to grow bigger.</p>