Facet-Dependent Selective Adsorption of Mn-Doped alpha-Fe2O3 Nanocrystals toward Heavy-Metal Ions
文献类型:期刊论文
作者 | Yuan, Qinglin1,2,3; Li, Pengfei2,3; Liu, Jun2,3; Lin, Yue1; Cai, Yunyu2,3; Ye, Yixing2,3; Liang, Changhao1,2,3 |
刊名 | CHEMISTRY OF MATERIALS |
出版日期 | 2017-12-12 |
卷号 | 29期号:23页码:10198-10205 |
ISSN号 | 0897-4756 |
DOI | 10.1021/acs.chemmater.7b04114 |
英文摘要 | Engineering exposed active facets by doping impurities can dramatically modify the morphology and physicochemical properties of nanocrystalline hematite. In the work described in this paper, through the combination of laser ablation in liquid and hydrothermal treatment techniques, faceted Mn-doped alpha-Fe2O3 nanocrystals (NCs) were prepared by adjusting the doping level of elemental Mn. With the increase of Mn doping level, the hematite crystal evolved sequentially from isotropic polyhedral nanoparticles (NPs) to {116}-faceted saucer-shaped nanosheets (NSs), and then to {001}-faceted hexagonal NSs. Electrochemical stripping tests revealed that the Mn-doped alpha-Fe2O3 NCs show a facet-dependent adsorption ability toward Pb(II), Cd(II), and Hg(II) heavy-metal ions; that is, {001}-faceted hexagonal NSs exhibit high and selective adsorption toward Pb2+ ions, while {116}-faceted saucer-shaped NSs present strong and selective adsorption toward Cd2+ and Hg2+ ions. Density functional theory (DFT) calculations found that Pb2+ and Cd2+ ions have the highest adsorption energy on the {001} and {116} facet, respectively, while Hg2+ ions have the largest adsorption energy on the {110} facet. Carved with a variety of facets, such as {012} and {104} facets with weak and even positive adsorption energy, polyhedral NPs show poor adsorption ability and nonselective adsorption toward the three heavy-metal ions selected. Our experimental and computational results not only provide new insights into the facet-related properties, but also guide the design of crystals with exposed active facets for specific applications. |
WOS关键词 | SENSING PROPERTIES ; PHOTOELECTROCHEMICAL PERFORMANCE ; HEMATITE NANOCRYSTALS ; VISIBLE-LIGHT ; NANOSTRUCTURES ; CRYSTALS ; WATER ; NANOSHEETS ; SYSTEMS ; OXIDE |
资助项目 | National Key Basic Research Program of China[2014CB931704] ; National Natural Science Foundation of China[11304315] ; National Natural Science Foundation of China[51401206] ; National Natural Science Foundation of China[11404338] ; National Natural Science Foundation of China[51371166] ; National Natural Science Foundation of China[51571186] ; National Natural Science Foundation of China[11504375] ; Chinese Academy of Sciences/State Administration of Foreign Experts Affairs (CAS/SAFEA) |
WOS研究方向 | Chemistry ; Materials Science |
语种 | 英语 |
出版者 | AMER CHEMICAL SOC |
WOS记录号 | WOS:000418206600040 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/34922] |
专题 | 合肥物质科学研究院_中科院固体物理研究所 |
通讯作者 | Liang, Changhao |
作者单位 | 1.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Hefei 230031, Anhui, Peoples R China 3.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China |
推荐引用方式 GB/T 7714 | Yuan, Qinglin,Li, Pengfei,Liu, Jun,et al. Facet-Dependent Selective Adsorption of Mn-Doped alpha-Fe2O3 Nanocrystals toward Heavy-Metal Ions[J]. CHEMISTRY OF MATERIALS,2017,29(23):10198-10205. |
APA | Yuan, Qinglin.,Li, Pengfei.,Liu, Jun.,Lin, Yue.,Cai, Yunyu.,...&Liang, Changhao.(2017).Facet-Dependent Selective Adsorption of Mn-Doped alpha-Fe2O3 Nanocrystals toward Heavy-Metal Ions.CHEMISTRY OF MATERIALS,29(23),10198-10205. |
MLA | Yuan, Qinglin,et al."Facet-Dependent Selective Adsorption of Mn-Doped alpha-Fe2O3 Nanocrystals toward Heavy-Metal Ions".CHEMISTRY OF MATERIALS 29.23(2017):10198-10205. |
入库方式: OAI收割
来源:合肥物质科学研究院
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