Hybrid composite materials with hierarchical structures have attracted continuing attention for their enhanced features and various applications. The new hybrid composites XW₉@PDA (XW₉ means Na₈H[α-PW₉O₃₄], Na₁₀[α-SiW₉O₃₄] and Na₁₀[α-GeW₉O₃₄]; PDA means polydopamine) have been synthesized for potential sensing applications. The effect of polyoxometalates on the formation of the hybrid composites was investigated. Scanning electron microscopy (SEM) supported the obtained XW₉@PDA were hierarchical microsphere. By monitoring the reaction of classical peroxidase substrate o-phenylenediamine (OPD) to form yellow 2, 3-diaminophenazine (DAB) in the presence of H₂O₂, the peroxidase-like activity of XW₉@PDA was calculated. The results showed that XW₉@PDA still keep the peroxidase-like activity and have 505.98%, 208.58% and 582.78% enhancement in intrinsic catalytic activity for PW₉@PDA, SiW₉@PDA and GeW₉@PDA. Among the three composites, PW₉@PDA showed the highest peroxidase-like activity. Therefore, PW₉@PDA was applicable to the colorimetric and electrochemical sensing for H₂O₂.

具有分层结构的混合复合材料因其增强的特性和各种应用而受到持续关注。新型混合复合材料 XW ₉ @PDA（XW ₉表示 Na ₈ H[α-PW ₉ O ₃₄ ]、Na ₁₀ [α-SiW ₉ O ₃₄ ] 和 Na ₁₀ [α-GeW ₉ O ₃₄ ]；PDA 表示聚多巴胺）已被合成用于潜在的传感应用。研究了多金属氧酸盐对杂化复合材料形成的影响。扫描电子显微镜 (SEM) 支持获得的 XW ₉@PDA 是分层微球。通过监测经典过氧化物酶底物邻苯二胺 (OPD) 在 H ₂ O ₂存在下形成黄色 2, 3-二氨基吩嗪 (DAB)的反应，计算了 XW ₉ @PDA的类过氧化物酶活性。结果表明，XW ₉ @PDA 仍保持类过氧化物酶活性，对 PW ₉ @PDA、SiW ₉ @PDA 和 GeW ₉ @PDA 的内在催化活性分别提高了 505.98%、208.58% 和 582.78% 。在三种复合材料中，PW ₉ @PDA 表现出最高的过氧化物酶样活性。因此，PW ₉ @PDA 适用于 H 的比色和电化学传感₂ O ₂。