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首页> 外文期刊>RSC Advances >Enhanced photocatalytic activity of magnetically separable bactericidal CuFe2O4-embedded Ag-deposited ZnO nanosheets
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Enhanced photocatalytic activity of magnetically separable bactericidal CuFe2O4-embedded Ag-deposited ZnO nanosheets

机译：磁性可分离的嵌入CuFe2O4的银沉积ZnO纳米片的增强的光催化活性

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Mineralization of organic pollutants by semiconductor-photocatalysis is an emerging technique but recovery of the photocatalyst nanoparticles is a hindrance for putting this technology into practice. Magnetic separation is feasible if a magnetic core is implanted in the photocatalyst particle. An iron oxide core, because of the conduction and valence band potentials, promotes electron-hole recombination in the core/shell photocatalyst and thus suppresses the photocatalytic activity. Here we present for the first time, the synthesis of magnetically recoverable bactericidal CuFe2O4-encapsulated Ag-deposited ZnO nanosheets for enhanced photocatalytic mineralization of dyes; the CB edge of the CuFe2O4 core does not induce charge carrier recombination. The nanosheets were obtained by a two-step synthesis of a hydrothermal method followed by photodeposition. High resolution scanning and transmission electron microscopies, selected area electron and X-ray diffractometries, vibrating sample magnetometry, and energy dispersive X-ray, Raman, solid state electrochemical impedance, UV visible diffuse reflectance, photoluminescence and time-correlated single photon counting lifetime spectroscopies show encapsulation of CuFe2O4 in Ag-deposited ZnO nanosheets. The synthesized composite nanosheets show enhanced photocatalytic activity. The synthesized nanosheets are a trifunctional material. The photocatalyst is photostable, reusable and magnetically separable. Furthermore, it exhibits excellent bactericidal activity.
机译：通过半导体光催化使有机污染物矿化是一种新兴技术，但是光催化剂纳米颗粒的回收是将该技术付诸实践的障碍。如果将磁芯植入光催化剂颗粒中，则磁分离是可行的。氧化铁核由于具有导带和价带电势而促进了核/壳光催化剂中的电子-空穴复合，因此抑制了光催化活性。在这里，我们首次提出了磁性可回收的杀菌CuFe2O4包裹的银沉积ZnO纳米片的合成，以增强染料的光催化矿化作用。 CuFe2O4核的CB边缘不会引起载流子复合。通过水热法的两步合成然后进行光沉积获得纳米片。高分辨率扫描和透射电子显微镜，选定区域电子和X射线衍射仪，振动样品磁力仪以及能量色散X射线，拉曼光谱仪，固态电化学阻抗，紫外可见漫反射率，光致发光和与时间相关的单光子计数寿命光谱图1a显示了CuFe 2 O 4在Ag沉积的ZnO纳米片中的包封。合成的复合纳米片表现出增强的光催化活性。合成的纳米片是三功能材料。光催化剂是光稳定的，可重复使用的和可磁分离的。此外，它表现出优异的杀菌活性。

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