水热法合成CsxWO3纳米棒及其红外吸收性能

摘要/Abstract

摘要： Cs_xWO₃纳米棒因其优异的近红外吸收性能得到研究人员的广泛关注,但目前水热法合成Cs_xWO₃纳米棒存在易形成等轴状纳米颗粒,或合成温度高,需要后续处理等问题。本文以钨酸铵((NH₄)₆ W₇O₂₄·6H₂O)、氯化铯(CsCl)、盐酸(HCl)和油胺(C₁₈H₃₇N)为原料,在220 ℃水热反应24 h合成了直径和长度分别为10~20 nm和100~250 nm的Cs_0.2WO₃纳米棒。研究了溶剂、合成路径以及HCl对Cs_0.2WO₃纳米棒的物相和形貌的影响,探讨了Cs_0.2WO₃纳米棒的形成机理,测试了Cs_0.2WO₃纳米棒的红外吸收性能。结果表明:过少和过量的HCl不利于合成Cs_0.2WO₃,改变HCl和CsCl的加入顺序,降低(NH₄)₆ W₇O₂₄·6H₂O、CsCl和HCl间的反应速率,有助于合成Cs_0.2WO₃纳米棒,且Cs_0.2WO₃纳米棒的红外吸收性能优于等轴状纳米颗粒。

关键词: 纳米棒, 水热合成, 红外吸收, Cs_xWO₃, 形成机理

Abstract: Cs_xWO₃ nanrods have attracted extensive attention due to their excellent near-infrared absorption properties. However, the Cs_xWO₃ nanorods synthesized via hydrothermal method are easy to form equiaxed nanoparticles, and the reaction temperature is high, followed by post-treatment. The Cs_0.2WO₃ nanorods with diameter and length of 10~20 nm and 100~250 nm were successfully hydrothermal synthesized via using ammonium tungstate ((NH₄)₆ W₇O₂₄·6H₂O), cesium chloride (CsCl), hydrochloride acid (HCl), oleylamine (C₁₈H₃₇N) as reactants in this paper. The effects of solvents, reaction route and amount of HCl on the phase and morphology of Cs_0.2WO₃ nanorods were investigated, followed by the discussion of the formation mechanism of Cs_0.2WO₃ nanorods and the test of infrared absorption properties of Cs_0.2WO₃ nanorods. The results show adding excess or little HCl are harmful for the synthesis of Cs_0.2WO₃. Changing the addition order of HCl and CsCl, following the decrease of reaction rate among (NH₄)₆ W₇O₂₄, CsCl and HCl, is benefit for the formation of Cs_0.2WO₃ nanorods. The infrared absorption test show Cs_0.2WO₃ nanorods are better than equiaxed Cs_0.2WO₃ nanoparticles.

Key words: nanorod, hydrothermal synthesis, infrared absorption, Cs_xWO₃, formation mechanism

中图分类号:

TB383.1

熊远鹏, 李锐星, 张越, 孔繁东, 钟麒. 水热法合成Cs_xWO₃纳米棒及其红外吸收性能[J]. 人工晶体学报, 2021, 50(6): 1036-1043.

XIONG Yuanpeng, LI Ruixing, ZHANG Yue, KONG Fandong, ZHONG Qi. Hydrothermal Synthesis of Cs_xWO₃ Nanorods and Their Infrared Absorption Properties[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(6): 1036-1043.

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水热法合成Cs_xWO₃纳米棒及其红外吸收性能

Hydrothermal Synthesis of Cs_xWO₃ Nanorods and Their Infrared Absorption Properties

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