A new approach for synthesis of ZnO nanorod flowerets and subsequent pure free-standing ZnO nanorods
A new approach for synthesis of ZnO nanorod flowerets and subsequent pure free-standing ZnO nanorods
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DOI：
10.1016/j.apt.2018.10.004
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发表时间：
2019-01-01
影响因子：
5.2
通讯作者：
Mondal, K.
中科院分区：
文献类型：
--
作者：
Bhushan, B.;Murty, B. S.;Mondal, K.
本工作报道了由平均长径比约为9的ZnO纳米棒花瓣组成的ZnO小花的合成，这些小花负载在尺寸约为1 - 4μm的富镍微米级颗粒上，同时还报道了通过在NaOH溶液中选择性浸出机械合金化的Ni - Zn粉末颗粒来制备独立的纯ZnO纳米棒。对初始合金粉末的成分、NaOH的浓度以及在溶液中的暴露时间进行了优化，以使ZnO小花的表面积增加约400%。基于包括电感耦合等离子体质谱（ICP - MS）和电化学测量在内的各种表征技术的证据，解释了ZnO纳米棒形成和生长的机制及反应化学。通过超声从ZnO小花的底部折断棒状花瓣，也合成了独立的纯ZnO纳米棒。独立的ZnO纳米棒平均长径比为8.5 ± 4，其中长度和平均直径分别约为356 ± 64 nm和42 ± 16 nm，比表面积为12.5 m² g⁻¹，与机械合金化粉末颗粒相比增加了约650%。（C）2018日本粉末技术学会。由爱思唯尔出版社和日本粉末技术学会出版。保留所有权利。
Present work reports the synthesis of ZnO flowerets consisting of nanorod petals of ZnO having a mean aspect ratio similar to 9, supported on micron sized Ni-enriched particles of size in the range of similar to 1-4 mu m and also free-standing pure ZnO nanorods from mechanically alloyed Ni-Zn powder particles via selective leaching in NaOH solution. Optimization of the composition of the initial alloy powder, the concentration of NaOH and time of exposure in the solution was carried out to get to the ZnO flowerets with an increment in the surface area of the order of 400%. The mechanism and reaction chemistry of ZnO nanorods formation and growth were explained based on the evidence of various characterization techniques including inductive coupled plasma mass spectroscopy (ICP-MS) and electrochemical measurements. Free-standing pure ZnO nanorods were also synthesized by ultrasonically breaking the rod petals of ZnO from the base of the flowerets. Free-standing ZnO nanorods have a mean aspect ratio of 8.5 +/- 4, where the length and average diameter are similar to 356 +/- 64 nm and 42 +/- 16 nm, respectively, and the specific surface area of 12.5 m(2) g(-1) with an increment of similar to 650% as compared to the mechanically alloyed powder particle. (C) 2018 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.