| 通过KxCrOy便捷水解制备六方和无定型羟基氧化铬(英文) |
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| 引用本文： | 梁书婷,张红玲,徐红彬. 通过KxCrOy便捷水解制备六方和无定型羟基氧化铬(英文)[J]. 中国有色金属学会会刊, 2020, 30(5): 1397-1405. DOI: 10.1016/S1003-6326(20)65305-5 |
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| 作者姓名： | 梁书婷 张红玲 徐红彬 |
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| 作者单位： | 1. 重庆文理学院化学与环境工程学院;2. 重庆文理学院环境材料与修复技术重庆市重点实验室;3. 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室;4. 中国科学院过程工程研究所绿色过程与工程重点实验室 |
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| 基金项目： | Project (cstc2019jcyj-msxm X0788) supported by the Natural Science Foundation of Chongqing,China；;Project (KJQN201901342) supported by the Science and Technology Research Program of Chongqing Municipal Education Commission,China； |
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| 摘 要： | 系统研究KCrO2和K3CrO4的水解过程和机理。XRD、IR和SEM的表征结果表明,在80°C的低反应温度和24 h的反应时间下,可以实现水解反应。此外,通过水解单相六方KCrO2,能形成灰绿色六方片状直径为10μm的α-CrOOH;而通过水解立方K3CrO4,能形成绿色无定形团聚体形态Cr(OH)3溶胶凝胶。通过上述水解反应合成纯相羟基氧化铬是一种非常简便与快速的方法。
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| 关 键 词： | 水解过程 CrOOH 氧化铬 活性KxCrOy 反应机理 |
| 收稿时间： | 2019-06-09 |
Preparation of hexagonal and amorphous chromium oxyhydroxides by facile hydrolysis of KxCrOy |
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| Affiliation: | 1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;2. Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI 49931, USA |
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| Abstract: | The hydrolysis process and mechanisms of unique as-prepared KCrO2 and K3CrO4 were systematically investigated. The characterization results of XRD, IR and SEM show that the hydrolysis reaction can be realized at a low reaction temperature of 80 °C and a reaction time of 24 h. Moreover, the greyish-green α-CrOOH with a hexagonal plate-like morphology and a large size of 10 μm is formed via the hydrolysis of the single-phase hexagonal KCrO2, while the green sol−gel of amorphous Cr(OH)3 with a lumpy aggregate morphology is generated through the hydrolysis of a cubic K3CrO4. It is a facile and rapid method to synthesize pure-phase chromium oxyhydroxide via the above hydrolysis. |
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| Keywords: | hydrolysis process CrOOH chromium oxide reaction mechanism |
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