The results of IR, ESR, NMR indicate that PVA was decomposed and the Keggin structure of SiWnCoP2O7/ kept excellently.

• 红外光谱(IR)、电子自旋共振、核磁共振表明，SiW_(11)Co-P_2O_7/PVA复合纳米纤维在500℃焙烧8h后，PVA分解，而SiW_(11)Co-P_2O_7仍然保持完好的Keggin结构。