纳米氧化物消化熟化的生长动力学研究
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- 英文论文题名：Grain-Growth Kinetics towards Digestive Ripening of Oxide Nanoparticles
- 论文作者：张月兰 ; 李莉萍 ; 李广社
- 英文论文作者：Yuelan Zhang ; Liping Li ; Guangshe Li ; Fujian institute of research in structure of matter ; Chinese Academy of Sciences ; State key laboratory of inorganic synthesis and preparative chemistry ; Institute of Chemistry ; Jilin University
- 年：2016
- 作者机构：中国科学院福建物质结构研究所;吉林大学化学学院无机合成与制备化学国家重点实验室;
- 论文关键词：纳米氧化物 ; 消化熟化 ; 生长动力学 ; CeO_2
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：259k
- 原文格式：D
- 会议级别：全国
摘要
纳米氧化物在发光和催化等领域都具有非常重要的应用。~[1]探索纳米材料的生长机制是设计合成相关材料的基础。一般而言,纳米氧化物需要通过‘自下而上’的方法合成,这种合成途径需要大量的实验过程来探索每种物质的特定合成条件。另外一种合成途径是具有一般性的‘自上而下’合成方法,譬如金属,合金以及金属硫化物可以通过消化熟化的过程形成均匀单分散纳米颗粒。~[2]但是受限于金属-氧之间强化学键,目前仍然缺乏纳米氧化物消化熟化的报道,更没有纳米氧化物消化熟化生长动力学的研究。在这里我们对典型的纳米氧化物(CeO_2)的消化熟化过程进行了研究,并解释了其生长动力学机制。研究发现可以通过延长水热反应时间,使CeO_2的平均粒径从41.9 nm逐渐减小到21.0 nm。该研究有利于更好地理解纳米氧化物消化熟化的特殊生长行为,并开辟了一条设计合成纳米氧化物的新途径。
Nano-oxides have wide applications in various fields like luminescence and catalysis, etc. The relevant investigations on grain growth behavior are important for material synthesis. Typically, as nano-oxides were prepared by ‘bottom-up' method, considerable time and efforts are required to find a specific experimental condition for each material. There is also a ‘top-down' general synthesis route, through which Metals, alloys and metal sulfides have been digested into mono-disperse nanoparticles. However, reports on the nano-oxide digestive ripening process is lacking due to the difficulty in breaking strong metal-oxygen bond. In this work, a representative nano-oxide CeO_2 was investigated to reveal the grain-growth behavior in digestive ripening process. The average particle size reduced from 41.9 nm to 21.0 nm with increasing the reaction time. The results reported here would help us understand the special digestive ripening behavior better and open up a new avenue to design and synthesis of nano-oxides.
Nano-oxides have wide applications in various fields like luminescence and catalysis, etc. The relevant investigations on grain growth behavior are important for material synthesis. Typically, as nano-oxides were prepared by ‘bottom-up' method, considerable time and efforts are required to find a specific experimental condition for each material. There is also a ‘top-down' general synthesis route, through which Metals, alloys and metal sulfides have been digested into mono-disperse nanoparticles. However, reports on the nano-oxide digestive ripening process is lacking due to the difficulty in breaking strong metal-oxygen bond. In this work, a representative nano-oxide CeO_2 was investigated to reveal the grain-growth behavior in digestive ripening process. The average particle size reduced from 41.9 nm to 21.0 nm with increasing the reaction time. The results reported here would help us understand the special digestive ripening behavior better and open up a new avenue to design and synthesis of nano-oxides.
引文
[1]Zuo Y.,Huang X.S.,Li L.P.,et al.,J.Mater.Chem.A,2013,1(2):374-380.
[2]T.S.Yoder,J.E.Cloud,G.J.Leong,et al.,Chem Mater 2014,26:6743-6751.
[2]T.S.Yoder,J.E.Cloud,G.J.Leong,et al.,Chem Mater 2014,26:6743-6751.