刘民

个人信息Personal Information

副教授

博士生导师

硕士生导师

主要任职:Associate Professor

其他任职:系教工党支部书记

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:化工学院

学科:工业催化. 能源化工

办公地点:大连理工大学西校区化工实验楼B421

电子邮箱:lium@dlut.edu.cn

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In situ synthesis of titanium doped hybrid metal-organic framework UiO-66 with enhanced adsorption capacity for organic dyes

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论文类型:期刊论文

发表时间:2017-11-01

发表刊物:INORGANIC CHEMISTRY FRONTIERS

收录刊物:SCIE

卷号:4

期号:11

页面范围:1870-1880

ISSN号:2052-1553

摘要:Titanium in different amounts has been successfully doped into the zirconium-based metal-organic framework UiO-66 via an in situ synthesis method, resulting in a series of hybrid UiO-66-nTi MOFs. These materials maintain a relatively high crystallinity and excellent structural stability. The addition of titanium has a significant effect on the crystal size and morphology of UiO-66. The UiO-66-nTi MOFs exhibit a sphere-like crystal morphology with a smaller crystal size and a rougher surface compared to the octahedral UiO-66 crystals. The framework order and porosity of the UiO-66-nTi MOFs decrease slightly due to titanium doping. The UiO-66-nTi MOFs were studied as adsorbents for the removal of an organic dye from water. The results demonstrate that these hybrid materials have enhanced adsorption capacity for the organic dye Conge red in comparison with the parent UiO-66. UiO-66-2.7Ti with 2.7% titanium doping shows the highest adsorption capacity of 979 mg g(-1), which is three times higher than that of the parent UiO-66. The strong electrostatic attraction between the positively charged surface of UiO-66-2.7Ti and the negatively charged Congo red molecules was identified as the main driving force for the high adsorption capacity.