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通过一步热解法合成了一种新的复合光催化剂C@CdS/埃洛石纳米管(HNTs).用扫描电镜(SEM),X射线能谱(EDS),透射电镜(TEM),X射线衍射(XRD),紫外-可见漫反射光谱(UV-Vis DRS),傅里叶变换红外(FT-IR)光谱,比表面积和拉曼光谱(RS)对材料进行表征.利用可见光下降解四环素探究了C@CdS/HNTs的光催化活性.结果表明,所制备的不同热解温度的样品中,400°C热解温度下的样品降解四环素效果最好,可见光照射60 min降解率能达到86%.此外,得益于碳层、CdS和HNTs的共同作用,光催化剂展示了很好的稳定性.放置一年对催化活性没有任何影响,并且经过三次循环实验,光催化剂活性没有很大变化.最后讨论了光催化剂的制备机理,并且对光催化降解过程的中间产物进行了分析.
A new composite photocatalyst, C @ CdS / halloysite nanotubes (HNTs), was synthesized by a one-step pyrolysis method.Using scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), X-ray The materials were characterized by XRD, UV-Vis DRS, FT-IR, Raman spectroscopy (RS), and the degradation of tetracycline by visible light The photocatalytic activity of C @ CdS / HNTs was investigated.The results showed that tetracyclines degraded best at 400 ° C pyrolysis temperature and the degradation rate reached 86% after 60 min exposure to visible light, In addition, photocatalysts exhibited good stability due to the combined effect of carbon layer, CdS and HNTs, which had no effect on the catalytic activity for one year and showed no significant change in photocatalytic activity after three cycles. Finally, the preparation mechanism of photocatalyst was discussed, and the intermediates of photocatalytic degradation process were analyzed.