The ability of rare-earth-doped ferroelectric oxides to achieve outstanding upconversion (UC) performances under NIR irradiation despite possessing intrinsic electric properties drives researchers all over the globe to work in this field. The structural and spectroscopic characteristics of the BiTiOphosphor integrated with Er, Yb, and Alhave been thoroughly investigated in this study. The considerable increase in UC emission ∼three times caused by the addition of Alions has been observed and discussed. The processes connected with the UC emission related to the pump power variation have been realized using the rate law equation. Aside from having high sensitivity of 0.011 Kat room temperature, the prepared phosphor possesses excellent thermal stability, i.e., it retains ∼73% of its initial intensity with the addition of Alions.
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http://dx.doi.org/10.1088/2050-6120/ac60a9 | DOI Listing |
J Environ Sci Health A Tox Hazard Subst Environ Eng
June 2018
b School of Environmental Science and Technology, Dalian Maritime University, Dalian , PR China.
This study investigated the impact of dissolved organic matters (DOM) on the ecological toxicity of aluminum oxide nanoparticles (AlONPs) at a relatively low exposure concentration (1 mg L). The unicellular green alga Scenedesmus obliquus was exposed to AlONP suspensions in the presence of DOM (fulvic acid) at various concentrations (1, 10, and 40 mg L). The results show that the presence of DOM elevated the growth inhibition toxicity of AlONPs towards S.
View Article and Find Full Text PDFMultivalent-ion batteries are emerging as low-cost, high energy density, and safe alternatives to Li-ion batteries but are challenged by slow cation diffusion in electrode materials due to the high polarization strength of Mg- and Al-ions. In contrast, Ca-ion has a low polarization strength similar to that of Li-ion, therefore a Ca-ion battery will share the advantages while avoiding the kinetics issues related to multivalent batteries. However, there is no battery known that utilizes the Ca-ion chemistry due to the limited success in Ca-ion storage materials.
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