Sodium hydrogensulfite (NaHSO3) is used as reductant to synthesize vanadium dioxide(VO2) from vanadium pentoxide(V2O5) particles. Metastable VO2(B) nanobelts are prepared hydrothermally at 260℃ for 8 h(pH = 1). NaHSO3 is not only a reductant but plays a key role in controlling the morphologies of the products. VO2(B) nanobelts with length of 0. 5~5 μm, width of 50~100 nm, are synthesized by the hydrothermal method. After annealing at 600℃ for 6 h, thermochromic VO2(M) is synthesized and the transition temperature is 68. 7 ℃.%以NaHSO3作为还原剂,将V2O5颗粒还原为VO2.在260℃、pH=1的水热条件下反应8h制得亚稳相VO2(B).NaHSO3不仅作为还原剂,而且对产物形貌的控制起关键作用.通过水热反应得到的VO2(B)是长0.5～5 μm、宽50～100 nm的纳米带.600℃下退火处理6h,VO2(B)完全转化为具有相变性质的VO2(M),相变温度为68.7℃.
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