Phase evolution and crystal growth of VO₂nanostructures under hydrothermal reactions

Abstract

The phase evolution and crystal growth of VO2 nanostructures under hydrothermal conditions was comprehensively investigated and the feasibility of the Ostwald's step rules towards VO2 polymorph evolution was for the first time demonstrated.

Infrared thermochromic properties of monoclinic VO2 nanopowders using a malic acid-assisted hydrothermal method for adaptive camouflage

“…The method is very nice compared to the present ones. Firstly, for the hydrothermal synthesis, most of previously reported studies used V 2 O 5 as a vanadium source, [15][16][17] which exhibited a toxic property, thus limited the usage and development of this method. Secondly, the preparation of VO 2 nanopowders mainly took higher-cost hydrazine as reducing agent, [18][19][20] which increased the cost of VO 2 nanopowders.…”

Hydrothermal Synthesis of VO2 Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

“…VO 2 (A) is another metastable phase of VO 2 , and it is widely accepted that VO 2 (A) is an intermediate phase between VO 2 (B) and VO 2 (R) . However, from the in situ electron microscopy works of Leroux et al, there is no evidence for the presence of VO 2 (A) at any stage during the transformation from VO 2 (B) to VO 2 (R) .…”

Effect of Mie Scattering on Thermochromic Performance of Branched VO2 Prepared by One‐Step Hydrothermal Method

“…As a consequence, the Δ T sol of B‐VO 2 films displays the negative values, as shown in Table . This abnormal optical property has rarely been paid attention in previous studies of B‐VO 2 ,[24b], [24c], but it appears in some works on the size‐dependent thermochromic performance of VO 2 . Long et al prepared VO 2 films by sol‐gel method combined with subsequent annealing treatment, and they observed a red shift of the crossover point with increasing particle size.…”