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Magnetically separable and visible light-active Ag/NiCo2O4 nanorods prepared by a simple route for superior photodegradation of atrazine in water
Progress in Natural Science: Materials International ( IF 4.7 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.pnsc.2020.01.021
Ahmed Shawky , Maha Alhaddad , R.M. Mohamed , Nasser S. Awwad , Hala A. Ibrahium

Abstract Atrazine (ATZ) is a known herbicide used in agriculture and caused many concerns according to its toxicity. Herein, we have prepared NiCo2O4 nanorods that can work as a photocatalyst under visible light exposure by Ag loading through a simple route. The characterizations revealed the role of Ag for improving the structural, optical and optoelectronic properties of the produced photocatalyst. The Ag loading with 5 wt% confirms the minimization of the bandgap from 3.6 down to 2.57 eV with enhanced visible light absorption and sustaining the magnetic properties. The Ag/NiCo2O4 nanorods showed a superior photodegradation of ATZ within 20 min at 2.0 g L–1 with excellent recyclability. The enhancement of the photocatalytic activity is referred to the local surface plasmon resonance of Ag-loaded photocatalyst. This reduces the electron-hole recombination and outperforms the unloaded sample. This work is highlighting the application of magnetically separable spinel photocatalysts for the removal of herbicides and water remediation.

中文翻译:

通过简单途径制备的可磁分离和可见光活性的 Ag/NiCo2O4 纳米棒可在水中对莠去津进行优异的光降解

摘要 阿特拉津(ATZ)是一种已知的农业除草剂,其毒性引起了许多关注。在此,我们通过简单的途径制备了 NiCo2O4 纳米棒,该纳米棒可在可见光下通过负载 Ag 充当光催化剂。表征揭示了银在改善所生产的光催化剂的结构、光学和光电性能方面的作用。5 wt% 的 Ag 负载证实了带隙从 3.6 eV 最小化到 2.57 eV,增强了可见光吸收并保持了磁性。Ag/NiCo2O4 纳米棒在 20 分钟内在 2.0 g L–1 下显示出优异的 ATZ 光降解,并具有出色的可回收性。光催化活性的增强是指负载Ag的光催化剂的局部表面等离子体共振。这减少了电子-空穴复合并优于未加载的样品。这项工作突出了磁可分离尖晶石光催化剂在去除除草剂和水修复方面的应用。
更新日期:2020-04-01
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