Wang Yuwei, Xu Kelin, Fan Liquan, Jiang Yongwang, Yue Ying, Jia Hongge
Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, China.
Nanomaterials (Basel). 2023 Jan 28;13(3):518. doi: 10.3390/nano13030518.
Black TiO with abundant oxygen vacancies (OVs)/B-doped graphitic carbon nitride (g-CN) Z-scheme heterojunction nanocomposites are successfully prepared by the one-pot strategy. The OVs can improve not only photogenerated carrier separation, but also the sorption and activation of antibiotic compounds (tetracycline hydrochloride, TC). The prepared heterojunction photocatalysts with a narrow bandgap of ∼2.13 eV exhibit excellent photocatalytic activity for the degradation of tetracycline hydrochloride (65%) under visible light irradiation within 30 min, which is several times higher than that of the pristine one. The outstanding photocatalytic property can be ascribed to abundant OVs and B element-dope reducing the bandgap and extending the photo-response to the visible light region, the Z-scheme formation of heterojunctions preventing the recombination of photogenerated electrons and holes, and promoting their effective separation.
通过一锅法策略成功制备了具有丰富氧空位（OVs）的黑色TiO/硼掺杂石墨相氮化碳（g-CN）Z型异质结纳米复合材料。氧空位不仅可以改善光生载流子的分离，还能提高抗生素化合物（盐酸四环素，TC）的吸附和活化。所制备的具有约2.13 eV窄带隙的异质结光催化剂在可见光照射下30分钟内对盐酸四环素的降解表现出优异的光催化活性（65%），这比原始材料高出几倍。优异的光催化性能可归因于丰富的氧空位和硼元素掺杂降低了带隙并将光响应扩展到可见光区域，异质结的Z型形成阻止了光生电子和空穴的复合，并促进了它们的有效分离。
