标题：Ultrahigh aniline-removal capacity of hierarchically structured layered manganese oxides: trapping aniline between interlayers作者：Xiao, Wei; Zhou, Peng; Mao, Xuhui; Wang, Dihua

来源出版物：JOURNAL OF MATERIALS CHEMISTRY A 卷：3 期：16 页：8676-8682 DOI：10.1039/c5ta01305d 出版年：2015

摘要：A significant improvement in adsorption capacity and selectivity for pollutants from wastewater over adsorbents is intrinsically limited by the disordered intra-granule pores of traditional adsorbents. Herein, we propose an unprecedented strategy of trapping pollutants between the interlayers of inorganic layered materials for the high-capacity and highly selective treatment of wastewater, utilizing the interlayer gaps of layered materials containing ordered two-dimensional (2D) nanoscaled channels for intra-lattice trapping of foreign species with sizes smaller than the interlayer gaps. Using such a trapping-between-interlayers mechanism, the layered matrixes can function as "sponges", absorbing pollutants by transforming the surface-adsorption of traditional adsorbents into bulk absorption. As a proof of concept, the trapping of toxic aniline with a diameter of 0.58 nm from alkaline aqueous solutions between interlayers of K+-preintercalated layered manganese oxides (delta-MnO2 or birnessite) with an interlayer gap of 0.73 nm via a K+/aniline exchange process is verified and rationalized by both experiments and density functional theory (DFT) simulations. An equilibrium aniline-removal capacity as high as 940.2 mg g(-1) is therefore achieved over hierarchically structured Mn3O4@delta-MnO2, one order of magnitude higher than that of traditional adsorbents. The proposed and verified strategy on trapping pollutants between the interlayers of inorganic layered materials opens a new avenue towards the high-capacity and highly selective treatment of wastewater.

入藏号：WOS:000352489200033

文献类型：Article

语种：English

扩展关键词：AQUEOUS-SOLUTION; CARBON NANOTUBES; WATER-TREATMENT; WASTE-WATER; ADSORPTION; PERFORMANCE; OXIDATION; PHENOL; EQUILIBRIUM; ADSORBENT

通讯作者地址：Wang, Dihua; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址：wangdh@whu.edu.cn

地址：

[Xiao, Wei; Mao, Xuhui; Wang, Dihua]Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Zhou, Peng] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Photochem, Beijing 100190, Peoples R China.

研究方向：Chemistry; Energy & Fuels; Materials Science

ISSN：2050-7488

eISSN: 2050-7496