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- 저자 : Lisha Xie (검색결과 2 건)
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Lisha Wang,Jinghua Jiang,Ting Yuan,Qiuyuan Xie,Huan Liu,Aibin Ma 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.5
Mg alloys containing long period stacking ordered (LPSO) structures possess excellent mechanical properties and corrosionresistance, exhibiting great application potential in biodegradable implants. The corrosion process of different LPSOphases in the Mg alloys need to be furtherly clarified in different solution environments. In this paper, we mainly reviewedthe influencing factors on the corrosion behavior of LPSO-containing Mg alloys, including the alloying elements, processingtechnologies, and the types, volume fractions and distributions of LPSO phases. Recent researches are well summarized withan emphasis on their corrosion mechanism. Special attention is given to the key issues for LPSO-containing Mg alloys asbiomedical implants, with their biodegradation behavior comprehensively discussed. The motivation is to provide theoreticalsupport for the possible application of LPSO-containing Mg alloys in the biomedical field.
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Ying Xiong,Lisha Xie,Long Zhu,Yuejiao Wang,Weijun Shan,Zhenning Lou,Junshuo Cui,Haibiao Yu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-
In this study, a three-dimensional chitosan/mesoporous silica composite material (I-CTS-KIT-6) was successfullysynthesized by one-step method using ion imprinting technology. To overcome the enormouscost problem, MoO4 2 with similar radius to ReO4was selected as template ion. In addition, the adsorbentwas prepared by using glutaraldehyde and chitosan as crosslinking agents and monomers and TEOS assilicon source in the process of imprinting. The effects of pH values, mass of chitosan and templateion, contact time, temperature and concentration on Re(VII) adsorption were studied. The resultsrevealed that the I-CTS-KIT-6 has the saturated adsorption capacity of 368.8 mg g1 at pH 3.0 for Re(VII), and the adsorption process corresponded to Langmuir isotherm and pseudo-second-order kinetics. Especially, the I-CTS-KIT-6 has higher selectivity for rhenium ions compared with the non-imprintedadsorbent. To verify the adsorption mechanism, density functional theory (DFT) was adopted to analyzethe binding patterns of Re(VII) with the I-CTS-KIT-6. The test analysis and calculation results further mentionedthat the adsorption mechanism is mainly three N atoms of I-CTS-KIT-6 coordinated with threeoxygen atoms of ReO4, which provides the theoretical foundations and explanations for adsorptionprocess.
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