以ZnO和 NaOH 为原料,采用低温水热法合成纳米 ZnO 半导体材料,并与聚乙烯醇(PVA)水溶液在超声作用下混合,通过直接煅烧制备出 PVA 中含共轭双键碳链结构(C)的 ZnO/PVAC 复合光催化材料。采用SEM、XRD、FTIR、Raman和 UV-Vis DRS对样品进行表征。结果表明：ZnO/PVAC 复合光催化材料由结晶性能良好的纳米 ZnO 和具有共轭结构的聚合物组成,且界面间通过化学键 Zn—O—C 相连接；在模拟太阳光照射下, ZnO/PVAC 复合光催化材料对光的吸收响应可扩展到整个可见光区,并产生较高光电流。光催化性能测试结果表明,ZnO/PVAC 复合光催化材料对罗丹明 B 的降解催化性能(30 min 降解率接近于100%)明显高于纯纳米ZnO。
Nano ZnO semiconductor material was synthesized using ZnO and NaOH as raw materials through low-temperature hydrothermal method,and then the ZnO/PVAC composite photocatalyst materials containing conj ugated double bond carbon chain structure (C)in poly (vinyl alcohol)(PVA)water solution were fabricated through direct thermal degradation of the coacervated PVA layer.The samples were characterized by SEM,XRD,FTIR,Raman and UV-Vis DRS.The results show that ZnO/PVAC composite photocatalyst materials contain nano ZnO with good crystallization property and conj ugated polymer structure,where nano ZnO is cavlently linked with conj ugated struc-tures of PVAC through the interfacial Zn—O—C chemical bonds.The ZnO/PVAC composite photocatalyst materials show extended light absorption in the visible light region and occur higher photocurrent under simulated sunlight ir-radiation.The photocatalytic property test results confirm that ZnO/PVAC composite photocatalyst materials exhibit better photocatalytic effect on the degradation of Rhodamine B (30 min degradation rate of up to 100%)compared to that with only nano ZnO.
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