采用柠檬酸作添加剂,用水热法合成了单斜相(γ-WO3)和正交相三氧化钨(β-WO3)矩形片.通过研究产物的组成、形貌和比表面积随反应时间的变化,发现在反应过程中产物组成由γ-WO3变为β-WO3,形貌均保持为矩形片,比表面积基本不变.由此推断,反应中生成的中间产物经历一系列原位变化最终转变为β-WO3.
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