A series of H₃PW₁₂O₄₀ (HPW)-containing polyimide (PI) hybrid composites (TPI) are prepared through in-situ solid-state polymerization using HPW, melem and pyromellitic dianhydride as precursors. The effect of HPW on the morphology, porosity, chemical structure, and optical and visible-light photocatalytic degradation efficiency of TPI composites are systematically investigated by various characteristic methods. By comparing the structure, property and photocatalytic activity of the TPI composites and the HPW-PI composites (prepared by the impregnation method), it indicates that HPW can promote the formation of CN bond in the five-membered imide rings between amines and anhydrides during the in-situ solid-state condensation process. Subsequently, the visible-light (λ > 400 nm) photocatalytic degradation efficiency of imidacloprid on TPI composites is also enhanced compared with the pristine PI because of the enhancement of the in-situ solid-state condensation reaction, photogenerated electron-hole separation efficiency and visible-light utilization efficiency after the introduction of HPW. The visible-light photocatalytic degradation rate constant k of 15% TPI composites prepared at 300 °C and 5% TPI composites prepared at 325 °C are about 10.33 and 2.42 times of the corresponding pristine PI, respectively. Compared with commercial P25, the photocatalytic degradation efficiency of 15% TPI-300 and 5% TPI-325 are about 4.58 and 5.13 times of P25 under visible light irradiation.

通过以HPW，Melem和均苯四甲酸二酐为前体，通过原位固相聚合制备了一系列含H ₃ PW ₁₂ O ₄₀（HPW）的聚酰亚胺（PI）杂化复合材料（TPI）。通过各种特征方法系统地研究了HPW对TPI复合材料的形貌，孔隙率，化学结构以及光学和可见光光催化降解效率的影响。通过比较TPI复合材料和HPW-PI复合材料（通过浸渍法制备）的结构，性质和光催化活性，表明HPW可以促进C的形成。在原位固态缩合过程中，胺和酸酐之间的五元酰亚胺环中的N键。随后，吡虫啉在TPI复合材料上的可见光（λ> 400 nm）光催化降解效率也比原始PI有所提高，这是因为原位固态缩合反应，光生电子-空穴分离效率和引入HPW后的可见光利用效率。可见光光催化降解率常数k在300°C下制备的15％TPI复合材料和在325°C下制备的5％TPI复合材料分别约为相应原始PI的10.33和2.42倍。与市售P25相比，在可见光下15％TPI-300和5％TPI-325的光催化降解效率分别约为P25的4.58和5.13倍。