VPO catalysts were prepared by Four methods. BET and XRD techniques were used to investigate the surface area and phase composition of VPO catalysts.
采用BET、XRD等测试手段，考察了由四种不同方法和条件下制备的VPO催化剂的比表面积和晶体结构。
VPO catalysts were prepared by Four methods. BET and XRD techniques were used to investigate the surface area and phase composition of VPO catalysts.
采用BET、XRD等测试手段，考察了由四种不同方法和条件下制备的VPO催化剂的比表面积和晶体结构。
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