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

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

doi:10.1021/acsomega.9b00721

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

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

Authors

Yi Zhang^{1

2}, Jiaqi Yang^{1

2}, Faying Fan^{1

1}, Binju Qing^{1

1}, Chaoliang Zhu^{1

1}, Yifei Shi^{1

1}, Jie Fan^{1

1}, Xiaochuan Deng^{1

1}

Affiliations

¹ 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.
² University of Chinese Academy of Science, Beijing 100049, China.

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^II/MgAl-CO₃ 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.