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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Structural characterization and photocatalytic activity of NiO/AgNb0_3
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Structural characterization and photocatalytic activity of NiO/AgNb0_3

机译：NiO / AgNb0_3的结构表征和光催化活性

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摘要

NiO/AgNbO_3 composites are prepared by wetness impregnation method. The physical and chemical properties of catalysts are characterized by XRD, XPS, SEM-EDS and DRS techniques. The photocatalytic performance of the samples is evaluated by photocatalytic oxidation of methylene blue dye under UV light irradiation. The results of XRD indicate that perovskite-type AgNbO_3 has a good crystal phase at different calcination temperatures and different NiO contents loaded. The XRD, XPS and SEM-EDS data indicate that NiO particles are presented on the surface of the pure AgNbO_3. The DRS analysis shows that the NiO formed on AgNb0_3 surface promotes the optical absorption in the visible region and makes it possible to enhance the photocatalytic activity. The result reveals that the degradation efficiency of methylene blue (MB) over NiO/AgNbO_3 is higher than that of pure AgNbO_3 under UV light and visible light irradiation, respectively. The highest photocatalytic degradation efficiency is observed when the sample calcined at 300 °C with 3 wt% Ni content under UV light irradiation with 3 h.
机译：采用湿法浸渍法制备了NiO / AgNbO_3复合材料。催化剂的物理和化学性质通过XRD，XPS，SEM-EDS和DRS技术表征。通过在紫外线照射下亚甲基蓝染料的光催化氧化来评估样品的光催化性能。 XRD结果表明，钙钛矿型AgNbO_3在不同的煅烧温度和不同的NiO含量下具有良好的晶相。 XRD，XPS和SEM-EDS数据表明，NiO颗粒存在于纯AgNbO_3的表面。 DRS分析表明，在AgNb0_3表面上形成的NiO促进了可见光区域的光吸收，并有可能增强光催化活性。结果表明，在紫外光和可见光照射下，亚甲基蓝（MB）在NiO / AgNbO_3上的降解效率均高于纯AgNbO_3。当样品在300℃，3％镍含量的紫外​​光照射3 h下煅烧时，观察到最高的光催化降解效率。

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