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以钛酸四丁酯〔Ti(OC4H9)4〕、硝酸锌和聚乙烯吡咯烷酮(PVP)为原料,采用溶胶-凝胶法和静电纺丝法制备无机有机复合的PVP/ZnO-TiO2纤维,高温焙烧制得直径100～200 nm的ZnO-TiO2纳米纤维。通过差动-热重(DSC-TGA)、傅里叶变换红外光谱(FTIR)、扫描电镜(SEM)等进行了表征,并测定了其对亚甲基蓝溶液的太阳光催化性能。结果表明,w(ZnO)=3%时,ZnO-TiO2纳米纤维对亚甲基蓝催化活性最高,太阳光照射6 h后降解率达99.4%,重复使用8次降解率仍然在95%以上。
The inorganic-organic composite PVP / ZnO-TiO2 fibers were prepared by sol-gel method and electrospinning method using tetrabutyl titanate [Ti (OC4H9) 4], zinc nitrate and polyvinylpyrrolidone (PVP) ZnO-TiO2 nanofibers with diameter of 100-200 nm were prepared by calcination. The samples were characterized by differential-thermogravimetry (DSC-TGA), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The solar photocatalytic activity of methylene blue solution was also determined. The results showed that the ZnO-TiO2 nanofibers had the highest catalytic activity for methylene blue when w (ZnO) = 3%, the degradation rate was 99.4% after 6 h of solar irradiation, and the degradation rate was still over 95% after 8 cycles.