|Table of Contents|

Preparation and thermochromic properties of B-Mg co-doped nano-VO2(PDF)

Journal of Shenzhen University Science and Engineering[ISSN:1000-2618/CN:44-1401/N]

Issue:
2022 Vol.39 No.4(363-488)
Page:
440-446
Research Field:
Chemistry & Chemical engineering

Info

Title:
Preparation and thermochromic properties of B-Mg co-doped nano-VO2
Author(s):
LV Weizhong1 ZHOU Qiaoting1 2 ZHOU Tianzi1 HUANG Chunbo1 LI Liangpu1 HUA Yue1 and ZHOU Shaohua1
1) College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518071, Guangdong Province, P. R. China
2) Guangzhou Institute of Quality Supervision and Inspection, Guangzhou 511400, Guangdong Province, P. R. China
Keywords:
smart materials vanadium dioxide (VO2) sol-gel-assisted hydrothermal method B-Mg co-doping thermochromic properties phase transition temperature
PACS:
TQ630
DOI:
10.3724/SP.J.1249.2022.04440
Abstract:
In order to reduce the phase transition temperature of vanadium dioxide (VO2) materials and improve the optical properties of VO2 materials, the boron-magnesium (B-Mg) co-doped vanadium dioxide (VO2) powders were prepared through a sol-gel-assisted hydrothermal method in combination with the subsequent high-temperature annealing. The obtained powder was further prepared into a thin film. X-ray diffraction (XRD), X-ray electron spectroscopy (XPS), field emission scanning electron microscope (FESEM), differential scanning calorimeter (DSC), ultraviolet-visible-near-infrared spectrophotometer (UV-vis-NIR) were used to explore the microstructure of the material and effects of the doping concentrations of Mg on the phase transition temperature tc and the optical properties of VO2 materials. The B-Mg co-doped nano-VO2 material that satisfies various application standards was obtained. The results show that the doped elements of B and Mg exist in the VO2 structure as the form of B3+ and Mg2+. When the atomic percentages of B and Mg are 6.0% and 1.8%, the material shows a relatively excellent thermochromic properties, with the lowest phase transition temperature tc = 30.8 ℃. The sunlight modulation amplitude ΔTsol of the material is 11.8%, which is maintained above 10%. The average visible light transmittance Tlum of the material is 69.7%, which is 12.1% higher than that of the undoped VO2 film. The properties above meet the requirements for the application in thermochromic smart windows. This work provides scientific basis for the preparation of VO2 materials suitable for thermochromic smart windows.

References:

[1] KIM J B, LEE D, YEO I H, et al. Hydrothermal synthesis of monoclinic vanadium dioxide nanocrystals using phase-pure vanadium precursors for high-performance smart windows [J]. Solar Energy Materials and Solar Cells, 2021, 226: 111055.
[2] SOUZA A, CERCENA R, DUARTE R, et al. The influence of precursors and additives on the hydrothermal synthesis of VO2: a route for tuning the metal-insulator transition temperature [J]. Ceramics International, 2020, 46(15): 23560-23566.
[3] LONG Shiwei, CAO Xun, SUN Guangyao, et al. Effects of V2O3 buffer layers on sputtered VO2 smart windows: improved thermochromic properties, tunable width of hysteresis loops and enhanced durability [J]. Applied Surface Science, 2018, 441: 764-772.
[4] HE Xinfeng, ZENG Yijie, XU Xiaofeng, et al. Orbital change manipulation metal-insulator transition temperature in W-doped VO2 [J]. Physical Chemistry Chemical Physics, 2015, 17(17): 11638-11646.
[5] KHAN G R, ASOKAN K, AHMAD B. Room temperature tunability of Mo-doped VO2 nanofilms across semiconductor to metal phase transition [J]. Thin Solid Films, 2017, 625: 155-162.
[6] PICCIRILLO C, BINIONS R, PARKIN I P. Nb-Doped VO2 thin films Prepared by aerosol-assisted chemical vapour deposition [J]. European Journal of Inorganic Chemistry, 2007(25): 4050-4055.
[7] CUI Yuanyuan, SHI Siqi, CHEN Lanli, et al. Hydrogen-doping induced reduction in the phase transition temperature of VO2: a first-principles study [J]. Physical Chemistry Chemical Physics, 2015, 17(32): 20998-21004.
[8] ALIVIO T E G, SELLERS D G, ASAYESH-ARDAKANI H, et al. Postsynthetic route for modifying the metal-insulator transition of VO2 by interstitial dopant incorporation [J]. Chemistry of Materials, 2017, 29(12): 5401-5412.
[9] ZHOU Qiaoting, L?(LV) Weizhong, QIU Qi, et al. Boron doped M-phase VO2 nanoparticles with low metal-insulator phase transition temperature for smart windows [J]. Ceramics International, 2019, 46(4): 4786-4794.
[10] AKAGI H, OHABA H, YOKOYKMA K, et al. Rotational-coherence molecular laser isotope separation [J]. Applied Physics B, 2009, 95(1): 17-21.
[11] JI Chunhui, WU Zhiming, LU Lulu, et al. High thermochromic performance of Fe/Mg co-doped VO2 thin films for smart window applications [J]. Journal of Materials Chemistry C, 2018, 6(24): 6502-6509.
[12] ZHANG Ruibo, JIN Haibo, GUO Deyu, et al. The role of Fe dopants in phase stability and electric switching properties of Fe-doped VO2 [J]. Ceramics International, 2016, 42(16): 18764-18770.
[13] LI Bin, TIAN Shouqin, TAO Haizheng, et al. Tungsten doped M-phase VO2 mesoporous nanocrystals with enhanced comprehensive thermochromic properties for smart windows [J]. Ceramics International, 2019, 45(4): 4342-4350.
[14] WANG Ning, LIU Shiyu, ZHAO Xiujian, et al. Mg/W-codoped vanadium dioxide thin films with enhanced visible transmittance and low phase transition temperature [J]. Journal of Materials Chemistry C, 2015, 3: 6771.
[15] WANG Ning, GOH Q S, LEE P L, et al. One-step hydrothermal synthesis of rare Earth/W-codoped VO2 nanoparticles: reduced phase transition temperature and improved thermochromic properties [J]. Journal of Alloys and Compounds, 2017, 711: 222-228.

Memo

Memo:
-