Synthesis and photocatalytic performance of ZnO with flower-like structure from zinc oxide ore

• 作者: Xiaoyi Shen Hongmei Shao Yan Liu Yuchun Zhai
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2020,（16）
• 页码范围: 1-7
• 页数: 7页
• 语种: 英文

摘要

Employing zinc sulfate solution obtained from zinc oxide ore as raw material,sodium hydroxide as precip-itant and PEG20000 as dispersant,ultrafine ZnO powders with different morphologies were successfully synthesized through hydrothermal method.The influences of the dosage of PEG20000 solution,molar ratio of OH-/Zn2+,reaction temperature,reaction time and Zn2+ concentration on the structures and morphologies of the ZnO powders were discussed in detail.The reaction conditions of synthesizing ZnO powders with flower-like structure were obtained as below:dosage of PEG20000 with 10％ mass fraction 5 mL,molar ratio of OH-to Zn2+ 5,reaction temperature 150 ℃,reaction time 8 h at Zn2+ concentration 1 mol L-1.The growth mechanism of ZnO particles with different morphologies was proposed.The ZnO powder with flower-like structure are composed of multiple micro-rods with hexagon morphology and has good photocatalytic degradation ability to degrade RhB.20 mL RhB solution with 15 mg L-1 could be completely degraded over flower-like ZnO powder 300 mg within 3 h.