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Shape‐Dependent CeO2@BiOI for Degradation of Aqueous Cr(VI)
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-03-12 , DOI: 10.1002/admi.201901879
Shuaishuai Peng 1 , Jingxia Yang 1, 2 , Lei Guo 1 , Jinjie Wang 1 , Jiachang Zhao 1 , Jingli Xu 1 , Zhiquan Li 2
Affiliation  

CeO2 with different morphologies (nanoparticles/NP, nanorods/NR, nanocubes/NC, nano‐octahedra/NO) are synthesized and decorated on BiOI nanoplates substrates to form CeO2@BiOI composites, which are used for aqueous Cr(VI) degradation. The intersurface states between BiOI and diverse CeO2 nanoparticles exhibit distinct behaviors when checked by XPS and photoluminescence intensity. The Cr(VI) degradation results show that the synthesized CeO2@BiOI nanocomposites possess higher photocatalytic activity than pure CeO2 or BiOI, and the CeO2‐NP@BiOI nanocomposite (molar ratio of CeO2: BiOI = 1:2) is the best one among them, with which the Cr(VI) is degraded up to 95.0% after 30 min irradiation using it as the photocatalyst. The superior catalytic performance of CeO2‐NP@BiOI can be attributed to a higher Ce3+ ratio of CeO2‐NP, a larger specific surface area, relatively low OH/CO32− content on the composite surface, and especially the good interaction between the CeO2 (111) facet and the BiOI surface.

中文翻译:

形状相关的CeO2 @ BiOI用于降解Cr(VI)

的CeO 2具有不同形态(纳米粒子/ NP,纳米棒/ NR,纳米立方体/ NC,纳米八面体/ NO)合成和装饰上BiOI纳米片基板以形成的CeO 2层@BiOI复合材料,其用于含水的Cr(VI)降解。当通过XPS和光致发光强度检查时,BiOI和各种CeO 2纳米颗粒之间的界面状态表现出不同的行为。Cr(VI)降解结果表明,合成的CeO 2 @BiOI纳米复合材料具有比纯CeO 2或BiOI更高的光催化活性,以及CeO 2 ‐NP @ BiOI纳米复合材料(CeO 2的摩尔比):BiOI = 1:2)是其中最好的一种,使用它作为光催化剂,在辐照30分钟后,Cr(VI)降解高达95.0%。CeO 2 -NP @ BiOI的优异催化性能可归因于CeO 2 -NP的Ce 3+比例更高,比表面积更大,复合材料表面上相对较低的OH / CO 3 2-含量,特别是CeO 2(111)面与BiOI表面之间的良好相互作用。
更新日期:2020-03-12
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