Shi Huancong, Zheng Tao, Zuo Yuanhui, Wu Qiming, Zhang Yun, Fan Yi, Tontiwachwuthikul Paitoon
Department of Environmental Science and Engineering, University of Shanghai for Science and Technology Shanghai 200093 P. R. China
Huzhou Institute of Zhejiang University Huzhou Zhejiang 313000 P. R. China
RSC Adv. 2021 Nov 12;11(53):33471-33480. doi: 10.1039/d1ra05905j. eCollection 2021 Oct 8.
Antibiotic drugs have become dominating organic pollutants in water resources, and efficient removal of antibiotic drugs is the priority task to protect the water environment. CuP/SnO photocatalysts of various CuP loadings (10-40 wt% CuP) were synthesized using a combination of hydrothermal synthesis and a partial annealing method. Their photocatalytic activity was tested for tetracycline hydrochloride (TC-HCl) degradation under visible light irradiation. CuP/SnO samples were characterized by X-ray diffraction (XRD), N-adsorption, ultraviolet-visible diffuse reflectance spectra (UV-vis DRS), scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The results showed that the p-n type heterostructure between CuP and SnO was successfully constructed, and addition of CuP to SnO could improve its photocatalytic activity at an optimized loading of 30 wt% CuP. In photocatalytic degradation studies, removal rates of around 80% were found in 30 minutes of dark reaction and 140 min of photodegradation. The removal rate was superior to that of CuP and SnO alone under the same experimental conditions. According to trapping experiments and electron spin resonance (ESR) measurements, photogenerated holes (h) and superoxide radicals ˙O were considered as the main oxidation species in the present system. Finally, the reuse experiments showed high stability of CuP/SnO. This study reports CuP as a cocatalyst combined with semiconductor SnO to form a highly efficient heterogeneous photocatalyst for the degradation of tetracycline hydrochloride for the first time.
抗生素药物已成为水资源中占主导地位的有机污染物，高效去除抗生素药物是保护水环境的首要任务。采用水热合成和部分退火方法相结合的方式，合成了不同CuP负载量（10 - 40 wt% CuP）的CuP/SnO光催化剂。在可见光照射下，对其光催化降解盐酸四环素（TC - HCl）的活性进行了测试。通过X射线衍射（XRD）、N吸附、紫外 - 可见漫反射光谱（UV - vis DRS）、扫描电子显微镜（SEM）和电化学阻抗谱（EIS）对CuP/SnO样品进行了表征。结果表明，成功构建了CuP与SnO之间的p - n型异质结构，在SnO中添加CuP，当CuP负载量为30 wt%时可优化其光催化活性。在光催化降解研究中，暗反应30分钟和光降解140分钟后，去除率约为80%。在相同实验条件下，该去除率优于单独的CuP和SnO。根据捕获实验和电子自旋共振（ESR）测量结果，光生空穴（h）和超氧自由基˙O 被认为是本体系中的主要氧化物种。最后，重复使用实验表明CuP/SnO具有很高的稳定性。本研究首次报道了将CuP作为助催化剂与半导体SnO结合，形成一种高效的非均相光催化剂用于降解盐酸四环素。
