TY - JOUR
T1 - Monodispersed hierarchical aluminum/iron oxides composites micro/nanoflowers for efficient removal of As(V) and Cr(VI) ions from water
AU - Zhang, Yongxing
AU - Ye, Yingjie
AU - Liu, Zhongliang
AU - Li, Bing
AU - Liu, Qinzhuang
AU - Liu, Qiangchun
AU - Li, Xuanhua
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2016/3/25
Y1 - 2016/3/25
N2 - Many nanomaterials have been widely reported for removal of toxic inorganic metal ions. However, some nanoscale adsorbents are subject to serious aggregation. For example, it is very difficult to directly synthesize the monodispersed Fe(OH)3 nanomaterials. Here, through using the monodispersed hierarchical γ-Al2O3 nanoflowers as adsorbent supports, the Fe(OH)3 colloid nanoparticles have been well deposited onto the surfaces of the hierarchical γ-Al2O3 nanostructures to form γ-Al2O3/Fe(OH)3 composites with hierarchical structures via an electrostatic attraction without forming large aggregates. The γ-Al2O3/Fe(OH)3 composites with hierarchical structures have high specific surface areas and large pore volumes, which are used as adsorbents to remove anion species of As(V) and Cr(VI) from aqueous solution. The maximum capacities of the monodispersed γ-Al2O3/Fe(OH)3 composites with hierarchical structures for As(V) and Cr(VI) are determined at 61.99 mg g-1 and 24.13 mg g-1, respectively, which are higher than those of the other metal oxide nanostructures reported. In addition, the adsorption rates of As(V) and Cr(VI) onto the monodispersed γ-Al2O3/Fe(OH)3 composites with hierarchical structures are rather fast. The γ-Al2O3/Fe(OH)3 hierarchical micro/nanoflower structures show high adsorption capacity for removing anion species of As(V) and Cr(VI), demonstrating a promising potential in environmental remediation.
AB - Many nanomaterials have been widely reported for removal of toxic inorganic metal ions. However, some nanoscale adsorbents are subject to serious aggregation. For example, it is very difficult to directly synthesize the monodispersed Fe(OH)3 nanomaterials. Here, through using the monodispersed hierarchical γ-Al2O3 nanoflowers as adsorbent supports, the Fe(OH)3 colloid nanoparticles have been well deposited onto the surfaces of the hierarchical γ-Al2O3 nanostructures to form γ-Al2O3/Fe(OH)3 composites with hierarchical structures via an electrostatic attraction without forming large aggregates. The γ-Al2O3/Fe(OH)3 composites with hierarchical structures have high specific surface areas and large pore volumes, which are used as adsorbents to remove anion species of As(V) and Cr(VI) from aqueous solution. The maximum capacities of the monodispersed γ-Al2O3/Fe(OH)3 composites with hierarchical structures for As(V) and Cr(VI) are determined at 61.99 mg g-1 and 24.13 mg g-1, respectively, which are higher than those of the other metal oxide nanostructures reported. In addition, the adsorption rates of As(V) and Cr(VI) onto the monodispersed γ-Al2O3/Fe(OH)3 composites with hierarchical structures are rather fast. The γ-Al2O3/Fe(OH)3 hierarchical micro/nanoflower structures show high adsorption capacity for removing anion species of As(V) and Cr(VI), demonstrating a promising potential in environmental remediation.
KW - Adsorption
KW - Heavy metal ions
KW - Hierarchical nanostructures
KW - γ-AlOFe(OH) composites
UR - http://www.scopus.com/inward/record.url?scp=84951268667&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2015.12.062
DO - 10.1016/j.jallcom.2015.12.062
M3 - 文章
AN - SCOPUS:84951268667
SN - 0925-8388
VL - 662
SP - 421
EP - 430
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -