Wu Xiaoge, Qin Nan, Yan Lei, Ji Renlong, Wu Di, Hou Zhenhua, Peng Weihua, Hou Jianhua
College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, , China.
College of Materials Science and Engineering, Yantai Nanshan University, Longkou, Shandong, China.
Front Chem. 2023 Jan 9;10:1102528. doi: 10.3389/fchem.2022.1102528. eCollection 2022.
Semiconductors have similar crystal structures and matched energy levels could form a coupled heterojunction at an interface between them which may allow response to visible light, achieving efficient decomposition of organic compounds. The BiOCO/BiOI (BOC/BOI) with 2D/2D p-n heterojunction was prepared by one-pot room-temperature strategy. The prepared materials were tested by various technologies, and the three-dimensional structure, light absorption properties, electrochemical properties and other information were obtained. Photocatalytic tests have also been carried out. BOC/BOI heterojunction with oxygen vacancies showed much higher photocatalytic activity than pure BOC and BOI. For example, the preferred BOC/BOI-0.5 heterojunction of the degradation rate for Rhodamine B (RhB) is 97.6 % within 2 h, which is 15.8 and 2.2 times faster than that of BiOI and BOC. In addition, the removal rates of tetracycline, ciprofloxacin and bisphenol A by BOC/ BOI-0.5 were 92.4, 80.3 and 68.6%, respectively. The 2D/2D structures of BOC/BOI-0.5 with rich in oxygen vacancies combined p-n junction can effectively inhibit the photoinduced electron-hole pair recombination and increase the production of active free radicals. The O- and h+ are the main reactants, giving the composite catalyst potential for degrading a variety of pollutants.
半导体具有相似的晶体结构，匹配的能级可以在它们之间的界面处形成耦合异质结，这可能允许对可见光产生响应，从而实现有机化合物的高效分解。通过一锅室温策略制备了具有二维/二维 p-n 异质结的 BiOCO/BiOI（BOC/BOI）。通过各种技术对制备的材料进行了测试，获得了三维结构、光吸收特性、电化学特性等信息。还进行了光催化测试。具有氧空位的 BOC/BOI 异质结表现出比纯 BOC 和 BOI 高得多的光催化活性。例如，降解罗丹明 B（RhB）的优选 BOC/BOI-0.5 异质结在 2 小时内的降解率为 97.6%，分别比 BiOI 和 BOC 快 15.8 倍和 2.2 倍。此外，BOC/BOI-0.5 对四环素、环丙沙星和双酚 A 的去除率分别为 92.4%、80.3%和 68.6%。富含氧空位的 BOC/BOI-0.5 的二维/二维结构结合 p-n 结可以有效抑制光生电子-空穴对的复合，并增加活性自由基的产生。O-和 h+是主要反应物，赋予复合催化剂降解多种污染物的潜力。
