标题：Trichloroacetic acid-modulated synthesis of polyoxometalate@UiO-66 for selective adsorption of cationic dyes
作者： Zeng, L (Zeng, Liang); Xiao, L (Xiao, Ling); Long, YK (Long, Yangke); Shi, XW (Shi, Xiaowen)
来源出版物：JOURNAL OF COLLOID AND INTERFACE SCIENCE 卷：516 页码: 274-283 DOI：10.1016/j.jcis.2018.01.070 出版年：APR 15 2018
摘要：In this study, POM@UiO-66 nanoparticles were fabricated by encapsulation of POM (K6P2W18O62 polyoxometalate) into mesoporous UiO-66 metal organic framework through a solvothermal method with trichloroacetic acid as a modulator to promote the defects formation of UiO-66. The as-prepared samples were characterized by TEM, SEM, PXRD, TG, XPS, and EDX elemental mapping, and the successful combination of POM and UiO-66 was confirmed. Two cationic dyes, rhodamine B and malachite green, and one anionic dye orange G were employed to investigate the adsorption performance of POM@UiO-66. The adsorption data showed that the removal process of cationic dyes by POM@UiO-66 matched well with the pseudo-second-order model and Langmuir isothermal model. The resulting POM@UiO-66 nanoparticles exhibited high adsorption to cationic dyes but low adsorption to anionic dyes, and the adsorption capacities of rhodamine B, malachite green, and anionic dye orange G were 222.6, 190.6 and 40 mg g(-1), respectively. Furthermore, the cationic dyes could be selectively removed from a cationic-anionic dye binary system. These results suggested that the novel polyoxometalate-based UiO-66 material is a promising candidate for the adsorption of cationic dyes from effluent.
作者关键词：UiO-66; Polyoxometalate; Acid-modulated synthesis; Selective adsorption; Cationic dyes
扩展关键词： METAL-ORGANIC FRAMEWORKS; AQUEOUS-SOLUTION; POLYDOPAMINE MICROSPHERES; CARBON NANOTUBES; METHYLENE-BLUE; REMOVAL; WATER; NANOPARTICLES; SEPARATION; ADSORBENT
通讯作者地址：Xiao, L (reprint author), Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechn, Wuhan 430072, Hubei, Peoples R China.
地址：[Zeng, Liang; Xiao, Ling; Long, Yangke; Shi, Xiaowen] Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechn, Wuhan 430072, Hubei, Peoples R China.
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