Visible-light-driven Ag/AgCl@In2O3: a ternary photocatalyst for the degradation of tetracycline antibiotics,Catalysis Science & Technology

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Visible-light-driven Ag/AgCl@In2O3: a ternary photocatalyst for the degradation of tetracycline antibiotics
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020-10-16 , DOI: 10.1039/d0cy01293a
Haiqin Lv _{1,

2,

2,

3,

4} , Yanyan Duan _{1,

2,

3,

5,

6} , Xin Zhou _{1,

2,

2,

3,

4} , Guimei Liu _{1,

2,

2,

3,

4} , Xin Wang _{3,

7,

8,

9,

10} , Yuanhao Wang _{3,

11,

12,

13,

14} , Mingzhe Yuan _{1,

2,

2,

3,

4} , Qingguo Meng _{1,

2,

2,

3,

4} , Chuanyi Wang _{1,

2,

3,

5,

6}

Affiliation

Shenyang Institute of Automation, Guangzhou, Chinese Academy of Science
Guangzhou
PR China
Guangdong Engineering and Technology Research Center for Environmental Purification and Functional Materials
Laboratory of Environmental Science and Technology
The Xinjiang Technical Institute of Physics and Chemistry
International Academy of Optoelectronics at Zhaoqing
South China Normal University
Zhaoqing
Institute of Electronic Paper Displays
SUSTech Engineering Innovation Center
School of Environmental Science and Engineering
Southern University of Science and Technology
Shenzhen

The abuse of tetracycline antibiotics (TCs) has created great threats to both human health and the ecosystem. Therefore, developing efficient technologies to remediate these contaminants is of significant and practical interest. In this work, a ternary plasmonic Ag/AgCl@In₂O₃ nanocomposite was synthesized by growing AgCl on the surface of one-dimensional In₂O₃ nanorods, followed by the in situ photoreduction of Ag from AgCl on AgCl@In₂O₃. The as-synthesized Ag/AgCl@In₂O₃ nanocomposite exhibits excellent performance for the photocatalytic degradation of tetracycline (TTC) with a degradation rate constant of 0.166 min⁻¹, which is much better than that of pristine In₂O₃, Ag@In₂O₃, AgCl@In₂O₃, Ag/AgCl, and In₂O₃ + Ag/AgCl (the mechanical mixture of In₂O₃ and Ag/AgCl) samples. Five photocatalytic cycling tests demonstrate that Ag/AgCl@In₂O₃ possesses outstanding stability. In addition, Ag/AgCl@In₂O₃ also exhibits excellent photo-activity for the degradation of other types of tetracycline antibiotics, e.g. chlortetracycline (CTC) and oxytetracycline (OTC). Further trapping experiments prove that h⁺ and ˙O₂⁻ are responsible for the photocatalytic reactions. The enhancement in the photoactivity of the Ag/AgCl@In₂O₃ system is largely due to the surface plasmon resonance effect (SPR) provided by the Ag nanoparticles, which inject electrons into AgCl and/or In₂O₃, and the efficient separation of photoinduced carriers is possible by transferring electrons to the conduction band of In₂O₃. This work provides a new type of photocatalyst towards the effective treatment of tetracycline antibiotics in aqueous systems.

中文翻译：

可见光驱动的Ag / AgCl @ In2O3：一种降解四环素抗生素的三元光催化剂

四环素抗生素的滥用对人类健康和生态系统都构成了巨大威胁。因此，开发有效的技术来补救这些污染物具有重大和实际意义。在这项工作中，通过在一维In ₂ O ₃纳米棒的表面上生长AgCl ，然后在AgCl @ In ₂ O上从AgCl原位还原Ag来合成三元等离子体Ag / AgCl @ In ₂ O ₃纳米复合材料。₃。合成后的Ag / AgCl @ In ₂ O ₃纳米复合材料对四环素（TTC）的光催化降解性能优异，降解速率常数为0.166 min ^-1，远优于原始In ₂ O ₃，Ag @ In ₂ O ₃，AgCl @ In ₂ O _3。，Ag / AgCl和In ₂ O ₃ + Ag / AgCl（In ₂ O ₃和Ag / AgCl的机械混合物）样品。五个光催化循环测试表明，Ag / AgCl @ In ₂ O ₃具有出色的稳定性。另外，Ag / AgCl @ In ₂ O ₃对其他类型的四环素抗生素（例如金霉素（CTC）和土霉素（OTC））的降解也具有优异的光活性。进一步捕集实验证明满足h ⁺和O ₂^-负责光催化反应。Ag / AgCl @ In ₂ O ₃系统的光活性增强很大程度上归因于由Ag纳米颗粒提供的表面等离子体共振效应（SPR），该表面等离子体将电子注入到AgCl和/或In ₂ O _3中，并且效率很高。通过将电子转移到In ₂ O ₃的导带，可以分离出光生载流子。这项工作为有效处理水性系统中的四环素抗生素提供了一种新型的光催化剂。

更新日期：2020-11-03

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