Preparation and characterization of CdS/BiOI composites with enhanced photocatalytic activity for degradation of 17α-ethinyl estradiol
Preparation and characterization of CdS/BiOI composites with enhanced photocatalytic activity for degradation of 17α-ethinyl estradiol
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DOI：
10.1016/j.materresbull.2017.11.041
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发表时间：
2018-03
影响因子：
5.4
通讯作者：
Shan Wang;Yu Chen;Lingxin Li;Yanju Long;Yingying Shi;Yefei Zhang;F. Jiang
中科院分区：
文献类型：
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作者：
Shan Wang;Yu Chen;Lingxin Li;Yanju Long;Yingying Shi;Yefei Zhang;F. Jiang
采用化学浴沉积法制备了CdS/BiOI复合材料。采用XRD、SEM、TEM、EDS、XPS、UV-vis DRS、PL等手段对复合材料的物理化学性能进行了表征。与纯CdS和纯BiOI相比，所合成的CdS/BiOI复合材料对17α-乙炔基雌二醇（EE 2）的光催化降解具有上级的活性，以3：1的CdS/BiOI复合材料为催化剂，在可见光照射12 min后，EE 2的去除率接近100%.在3：1 CdS/BiOI复合物上的反应速率常数分别是纯CdS、纯BiOI和P25的6.3、7.1和70.9倍。此外，根据实验结果和理论计算，提出了Z型电荷分离机理。此外，所制备的复合材料具有良好的稳定性和可回收性，这有利于其实际应用。
A novel CdS/BiOI composite has been prepared via a chemical bath deposition method. The physical and chemical properties of as-prepared composites were characterized by XRD, SEM, TEM, EDS, XPS, UV–vis DRS, and PL. The synthesized CdS/BiOI composites exhibited superior photocatalytic activity in photodegrading of 17α-ethinyl estradiol (EE2) compared to pure CdS and pure BiOI, and the removal rate of EE2 could approach 100% after only 12 min of visible light irradiation using 3:1 CdS/BiOI composite as photocatalyst. The reaction rate constant over 3:1 CdS/BiOI composite was 6.3, 7.1 and 70.9 times higher than that of pure CdS, pure BiOI and P25 respectively. In addition, a Z-scheme charge separation mechanism was proposed on the basis of the experimental results and the theoretical calculation. Moreover, the prepared composite showed good stability and recyclability which are beneficial for its practical application.