Biopolymer-assisted construction and gas-sensing study of uniform solid and hollow ZnSn(OH)₆ spheres

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• 作者：Rongmei Liu^a ; ^b ; ^cAuthor Vitae ; Yuanwen Jiang^a ; ^bAuthor Vitae ; Feng Gao^a ; ^{fgao@nju.edu.cn}Author Vitae ; Wei Du^a ; ^bAuthor Vitae ; Qingyi Lu^b ; ^{qylu@nju.edu.cn}Author Vitae
• 关键词：ZnSn(OH)6 ; Biopolymer ; Hollow spheres ; Gas sensor ; Ethanol
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：1 March, 2013
• 年：2013
• 卷：178
• 期：Complete
• 页码：119-124
• 全文大小：2024 K

文摘

In this study, solid ZnSn(OH)₆ microspheres were successfully synthesized with water-soluble biopolymer sodium alginate as crystal growth modifiers and ammonia as basic source under hydrothermal conditions. In the alkaline solution, the solid ZnSn(OH)₆ spheres can be gradually corroded by ammonia to form hollow ZnSn(OH)₆ spheres under the hydrothermal conditions through a dissolution-reprecipitation mechanism. Gas sensor tests indicate that hollow ZnSn(OH)₆ spheres have a better response to ethanol compared to solid ZnSn(OH)₆ spheres, which might be due to the hollow structure-resulted larger specific surface area. This method would provide a potential route for the synthesis of hollow ternary compounds.