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Heterogeneous Ternary Metal Oxide Nanocomposites for Improved Advanced Oxidation Process under Visible Light
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2020-08-23 , DOI: 10.1002/crat.202000099 Gaurav K. Upadhyay 1 , Trilok K. Pathak 1, 2 , Lakshami P. Purohit 1
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2020-08-23 , DOI: 10.1002/crat.202000099 Gaurav K. Upadhyay 1 , Trilok K. Pathak 1, 2 , Lakshami P. Purohit 1
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Here, heterogeneous ternary metal oxide CdO:TiO2:ZnO (coded as CTZ0, CTZ1, CTZ2, CTZ3, CTZ4) nanocomposites are synthesized by a sol–gel precipitation method for the advanced oxidation process (AOP) under visible light. The structure, texture, and surface morphology of heterogeneous nanocomposites are identified by X‐ray diffraction, high‐resolution transmission electron microscopy, and field emission scanning electron microscopy, respectively, while the optical property is investigated by UV–vis spectrophotometry. Furthermore, mixed phases such as anatase and rutile TiO2, cubic CdO and hexagonal ZnO, as well as a mixture of morphology, viz., nanorod, nanoflakes, cluster, and aggregation of particles are observed concurrently for sample CTZ3. The reflectance of heterogeneous CdO:TiO2:ZnO nanocomposites is recorded in the visible wavelength range from 400 to 800 nm and optical bandgap is varied from 1.91 to 2.20 eV for samples CTZ1–CTZ4. The effect of weight load 5 g L−1 of heterogeneous nanocomposites is evaluated for degradation of organic dyes at neutral pH and obtains the highest efficiency for sample CTZ3 as 99.6% and 99.4% in methyl orange and methylene blue, respectively. Both biological oxygen demand and chemical oxygen demand values are reduced followed by AOP increasing the number of pollutant molecules for absorption in the mixture.
中文翻译：
可见光下非均相三元金属氧化物纳米复合材料用于改进高级氧化工艺
在这里，通过溶胶-凝胶沉淀法在可见光下对高级氧化过程（AOP）合成了异质三元金属氧化物CdO：TiO 2：ZnO（编码为CTZ0，CTZ1，CTZ2，CTZ3，CTZ4）纳米复合材料。分别通过X射线衍射，高分辨率透射电子显微镜和场发射扫描电子显微镜来鉴定异质纳米复合材料的结构，质地和表面形态，同时通过紫外可见分光光度法研究其光学性质。此外，同时观察到样品CTZ3的混合相，如锐钛矿和金红石TiO 2，立方CdO和六角形ZnO，以及形态，纳米棒，纳米薄片，簇和聚集的混合物。异质CdO：TiO的反射率2：ZnO纳米复合材料记录在可见光范围为400至800 nm的范围内，样品CTZ1–CTZ4的光学带隙在1.91至2.20 eV之间变化。评估了5 g L -1的异质纳米复合材料在有机pH值下降解有机染料的效果，并获得了样品CTZ3的最高效率，分别为甲基橙和亚甲基蓝，分别为99.6％和99.4％。降低生物需氧量和化学需氧量，然后通过AOP增加混合物中吸收的污染物分子的数量。
更新日期：2020-08-23
中文翻译：
可见光下非均相三元金属氧化物纳米复合材料用于改进高级氧化工艺
在这里，通过溶胶-凝胶沉淀法在可见光下对高级氧化过程（AOP）合成了异质三元金属氧化物CdO：TiO 2：ZnO（编码为CTZ0，CTZ1，CTZ2，CTZ3，CTZ4）纳米复合材料。分别通过X射线衍射，高分辨率透射电子显微镜和场发射扫描电子显微镜来鉴定异质纳米复合材料的结构，质地和表面形态，同时通过紫外可见分光光度法研究其光学性质。此外，同时观察到样品CTZ3的混合相，如锐钛矿和金红石TiO 2，立方CdO和六角形ZnO，以及形态，纳米棒，纳米薄片，簇和聚集的混合物。异质CdO：TiO的反射率2：ZnO纳米复合材料记录在可见光范围为400至800 nm的范围内，样品CTZ1–CTZ4的光学带隙在1.91至2.20 eV之间变化。评估了5 g L -1的异质纳米复合材料在有机pH值下降解有机染料的效果，并获得了样品CTZ3的最高效率，分别为甲基橙和亚甲基蓝，分别为99.6％和99.4％。降低生物需氧量和化学需氧量，然后通过AOP增加混合物中吸收的污染物分子的数量。
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