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二价金属对M/MgAl层状双氢氧化物紫外屏蔽性能的影响

Effect of Divalent Metals on the UV-Shielding Properties of M/MgAl Layered Double Hydroxides.

作者信息

Zhang Yi, Yang Jiaqi, Fan Faying, Qing Binju, Zhu Chaoliang, Shi Yifei, Fan Jie, Deng Xiaochuan

机构信息

Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources and Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources, Chinese Academy of Sciences, Xining 810008, China.

University of Chinese Academy of Science, Beijing 100049, China.

出版信息

ACS Omega. 2019 Jun 11;4(6):10151-10159. doi: 10.1021/acsomega.9b00721. eCollection 2019 Jun 30.

DOI:10.1021/acsomega.9b00721
PMID:31460107
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6648468/
Abstract

Both the particle size and compositions have a strong influence on the UV-shielding performance of layered double hydroxides (LDHs), and they will interact with each other. To investigate the effects of divalent metal ions on the UV-shielding properties of layered double hydroxides (LDHs), M/MgAl-CO LDHs (M = Mg, Co, Ni, Cu, or Zn) with the same primary and secondary particle size have been prepared and their UV-shielding performance have been studied in this work. The UV-vis spectra show that the ZnMgAl-LDHs exhibit the highest absorbance under the ultraviolet B and ultraviolet A rays among these LDH samples, but in the ultraviolet C region, the CuMgAl-LDHs show the highest absorbance and this result is in good accordance with the UV-shielding performance, which was examined by protecting the photocatalytic degradation of rhodamine B aqueous solution. Moreover, under UV rays, PP/ZnMgAl-LDH films show excellent resistance to UV aging, which can be attributed to the strong inhibition of ZnMgAl-LDHs during the production of free radicals in polypropene, as has been confirmed by electron spin resonance results.

摘要

粒径和组成对层状双氢氧化物(LDHs)的紫外线屏蔽性能都有很大影响,并且它们会相互作用。为了研究二价金属离子对层状双氢氧化物(LDHs)紫外线屏蔽性能的影响,本工作制备了具有相同一次和二次粒径的M/MgAl-CO LDHs(M = Mg、Co、Ni、Cu或Zn),并研究了它们的紫外线屏蔽性能。紫外可见光谱表明,在这些LDH样品中,ZnMgAl-LDHs在紫外线B和紫外线A波段表现出最高的吸光度,但在紫外线C区域,CuMgAl-LDHs表现出最高的吸光度,这一结果与通过保护罗丹明B水溶液的光催化降解所检测的紫外线屏蔽性能良好吻合。此外,在紫外线照射下,PP/ZnMgAl-LDH薄膜表现出优异的抗紫外线老化性能,这可归因于ZnMgAl-LDHs在聚丙烯中自由基产生过程中的强烈抑制作用,电子自旋共振结果已证实了这一点。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e555/6648468/633ea59e521f/ao-2019-007217_0010.jpg
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