One-Step Hydrothermal Synthesis of W-Doped VO2 (M) Nanorods with a Tunable Phase-Transition Temperature for Infrared Smart Windows
One-Step Hydrothermal Synthesis of W-Doped VO2 (M) Nanorods with a Tunable Phase-Transition Temperature for Infrared Smart Windows
复制标题
一步水热合成相变温度可调的 W 掺杂 VO2 (M) 纳米棒，用于红外智能窗
DOI：
10.1021/acsomega.6b00221
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发表时间：
2016-12-01
期刊：
影响因子：
4.1
通讯作者：
Huang, Wanxia
中科院分区：
文献类型：
--
作者：
Liang, Shan;Shi, Qiwu;Huang, Wanxia
二氧化钒（VO 2）在室温附近具有可逆的金属-半导体转变，是热致变色窗的一个引人注目的候选者。由VO 2纳米颗粒衍生的纳米复合材料涂层因其在大规模制备、灵活成型和光学性能调节方面的优势而特别上级VO 2薄膜。本论文采用一步水热法合成了掺W的VO 2（M）纳米棒，并研究了其在大尺寸红外智能窗中的应用。在引入酒石酸作为新的还原剂时，VO 2经历了从纯相VO 2（A）纳米带到VO 2（M）纳米棒的两阶段相演变，而不是传统的水热合成过程中的B-A-M三阶段相演变。这种转变非常有利于VO 2（M）的大规模水热合成。VO 2（M）纳米颗粒的相变温度可以通过W掺杂系统地调节，还原效率约为24.52摄氏度/原子% W。此外，VO 2（M）复合薄膜的制备使用一个方便的辊涂方法，表现出显着的中红外透射转换高达31%，相变温度约为37.3摄氏度。这项工作展示了一步水热合成VO 2（M）纳米棒的重大进展，并为其在红外智能窗中的应用提供了重要的见解。
Vanadium dioxide (VO2), with reversible metal-semiconductor transition near room temperature, is a compelling candidate for thermochromic windows. Nanocomposite coatings derived from VO2 nanoparticles are particularly superior to VO2 films due to their advantages in large-scale preparation, flexible shaping, and regulation of optical properties. In this work, we developed a novel method for one-step hydrothermal synthesis of W-doped VO2 (M) nanorods and studied their application in large-scale infrared smart windows. On introducing tartaric acid as a new reductant, VO2 underwent a two-stage phase evolution from the pure phase comprising VO2 (A) nanobelts to VO2 (M) nanorods, instead of the conventional three-stage B-A-M phase evolution during hydrothermal synthesis. This transition is very favorable for the large-scale hydrothermal synthesis of VO2 (M). The phase-transition temperature of VO2 (M) nanoparticles can be regulated systematically by W doping, with a reduction efficiency of about 24.52 degrees C/atom % W. Moreover, VO2 (M) composite films were fabricated using a convenient roller coating method, which exhibited significant midinfrared transmission switching up to 31%, with a phase-transition temperature of about 37.3 degrees C. This work demonstrates the significant progress in the one-step hydrothermal synthesis of VO2 (M) nanorods and provides significant insights into their applications in infrared smart windows.