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首页> 外文期刊>Desalination and water treatment >Preparation and characterization of Sn/Zn/TiO2 photocatalyst for enhanced amoxicillin trihydrate degradation
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Preparation and characterization of Sn/Zn/TiO2 photocatalyst for enhanced amoxicillin trihydrate degradation

机译：促进阿莫西林三水合物降解的Sn / Zn / TiO2光催化剂的制备与表征

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Sn/Zn/TiO2 nanoparticles were produced via sol-gel method. Characterization of the nanoparticles was carried out by means of X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy, and N-2 adsorption/desorption isotherm and Brunauer-Emmett-Teller (BET) analysis methods. The photocatalytic activity of synthesized nanoparticles was investigated in the photocatalytic degradation of amoxicillin trihydrate (AMOX) antibiotic. The reaction was monitored by chemical oxygen demand, total organic carbon, and average oxidation state (AOS) calculations. The AOS reach values around +4 indicating the formation of low-molecular-weight carboxylic acids. The oxidation reaction fit with the Langmuir-Hinshelwood kinetic model indicating the dependence of reaction rate with initial adsorption step. The temperature dependence of the photocatalytic degradation was studied. The activation energy was 18.013kJmol(-1) in the range of 293-313K for this process. The figures of merit based on electric energy consumption (electrical energy per order (E-EO)) were evaluated in the photodegradation of AMOX in the presence of prepared samples. The results indicate that less energy is consumed during the degradation of AMOX in the presence of Sn/Zn/TiO2 compared with other photocatalysts. The photocatalytic activity of TiO2 co-doped with Sn, and Zn was markedly improved due to the synergistic actions of the two dopants.
机译：通过溶胶-凝胶法制备了Sn / Zn / TiO2纳米粒子。纳米颗粒的表征通过X射线衍射，透射电子显微镜，能量色散X射线光谱，N-2吸附/解吸等温线和Brunauer-Emmett-Teller（BET）分析方法进行。研究了合成纳米颗粒在三水合阿莫西林（AMOX）抗生素的光催化降解中的光催化活性。通过化学需氧量，总有机碳和平均氧化态（AOS）计算来监测反应。 AOS达到+4左右的值，表明形成了低分子量羧酸。氧化反应符合Langmuir-Hinshelwood动力学模型，表明反应速率与初始吸附步骤有关。研究了光催化降解的温度依赖性。在此过程中，活化能在293-313K范围内为18.013kJmol（-1）。在制备的样品存在下，在AMOX的光降解过程中，评估了基于电能消耗（每订单电能（E-EO））的品质因数。结果表明，与其他光催化剂相比，在Sn / Zn / TiO2存在下AMOX降解过程中消耗的能量更少。由于两种掺杂剂的协同作用，TiO 2与Sn和Zn共掺杂的光催化活性显着提高。

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