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Controllable synthesis of CeO2/g-C3N4 Hybrid Catalysts and its Structural, Optical and Visible Light Photocatalytic Activity
Diamond and Related Materials ( IF 4.1 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.diamond.2020.108161
D. Barathi , N. Rajalakshmi , R. Ranjith , R. Sangeetha , S. Meyvel

Abstract Herein, we construct the visible light active CeO2/g-C3N4 hybrid nanocomposite catalysts via a facile hydrothermal method. Different mass ratio of CeO2 (5, 10 and 15 wt%) in to g-C3N4 was making to optimize the physic-chemical properties of the composites. Numerous studies such as XRD, TEM, Raman, UV-DRS, PL and BET was utilize to examine the structural, morphological and light absorption properties of the catalyst. Cubic structure with uniform spherical (25–35 nm) were consistently wrapped on the g-C3N4 nanosheet. The photocatalytic activity of the obtained catalyst was monitored using highly toxic hexavalent chromium and 2-nitrophenol abbreviation as Cr(VI) and 2-NP pollutants. The results showed that 15 wt% CeO2 demoralized g-C3N4 nanosheets possessed tremendous photocatalytic behavior such as high efficiency (96%), huge apparent rate of 1.2734 min−1 and desirable long term stability. This could be due to the heterostructure provide huge surface area, smaller band gap as well as efficient charge separation, which enhancing the improved photocatalytic activity under visible light irradiation. The improved photocatalytic mechanism has also been proposed.

中文翻译:

CeO2/g-C3N4杂化催化剂的可控合成及其结构、光学和可见光光催化活性

摘要 在此,我们通过简便的水热法构建了可见光活性 CeO2/g-C3N4 杂化纳米复合催化剂。CeO2 (5、10 和 15 wt%) 与 g-C3N4 的不同质量比用于优化复合材料的理化性能。许多研究,如 XRD、TEM、拉曼、UV-DRS、PL 和 BET,被用来检查催化剂的结构、形态和光吸收性能。具有均匀球形(25-35 nm)的立方结构始终包裹在 g-C3N4 纳米片上。使用剧毒的六价铬和 2-硝基苯酚的缩写作为 Cr(VI) 和 2-NP 污染物监测所得催化剂的光催化活性。结果表明,15 wt% 的 CeO2 去气化 g-C3N4 纳米片具有巨大的光催化性能,如高效率 (96%)、1.2734 min-1 的巨大表观速率和理想的长期稳定性。这可能是由于异质结构提供了巨大的表面积、更小的带隙以及有效的电荷分离,从而提高了在可见光照射下的光催化活性。还提出了改进的光催化机理。
更新日期:2021-01-01
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