Synthesis of New Antibacterial ZnO Powders by Hydrothermal Treatment and their Characterization

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  • Matsuoka Sho
    Department of Molecular Chemistry & Biochemistry, Doshisha University
  • Kato Masaki
    Department of Molecular Chemistry & Biochemistry, Doshisha University
  • Hirota Ken
    Department of Molecular Chemistry & Biochemistry, Doshisha University
  • Tsukagoshi Kazuhiko
    Department of Chemical Engineering and Materials Science, Faculty of Science & Engineering, Doshisha University

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  • 水熱処理による新規抗菌性ＺｎＯ粉体の合成と特性評価
  • スイネツ ショリ ニ ヨル シンキ コウキンセイ ZnO フンタイ ノ ゴウセイ ト トクセイ ヒョウカ

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Abstract

Homogeneous ZnO powders with antibacterial activity have been synthesized by hydrothermal treatment at 160∼190°C under 1.01∼1.09 MPa for 10∼50 h using Zn(NO3)2·6H2O, hexamethylenetetramine ((CH2)6N4) and ethanol. Their particle morphology and specific surface areas have been characterized in relation with the synthesis conditions. A luminol chemiluminescence (CL) measurement has been applied to evaluate their antibacterial activity under dark conditions. Experimental results revealed that the ZnO nanorod powders (a length ≤ 500 nm and a diameter ≤ 100 nm), prepared under the conditions of 160°C/20h/1.09MPa, showed the highest photon counts of 3.75×105, which value was ten times higher than that (3.59×104 counts) of conventional ZnO powders commercially available.

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