Next Article in Journal
Spherical Activated Carbons with High Mechanical Strength Directly Prepared from Selected Spherical Seeds
Previous Article in Journal
Textile-Based, Interdigital, Capacitive, Soft-Strain Sensor for Wearable Applications
Open AccessArticle

Enhanced Uptake of Iodide from Solutions by Hollow Cu-Based Adsorbents

Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, China
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Authors to whom correspondence should be addressed.
Materials 2018, 11(5), 769;
Received: 10 April 2018 / Revised: 8 May 2018 / Accepted: 9 May 2018 / Published: 10 May 2018
(This article belongs to the Section Porous Materials)
Cu2O exhibits excellent adsorption performance for the removal of I anions from solutions by doping of metallic Ag or Cu. However, the adsorption process only appears on the surface of adsorbents. To further improve the utilization efficiencies of Cu content of adsorbents in the uptake process of I anions, hollow spheres of metallic Cu, Cu/Cu2O composite and pure Cu2O were prepared by a facile solvothermal method. Samples were characterized and employed for the uptake of I anions under various experimental conditions. The results show that Cu content can be tuned by adjusting reaction time. After the core was hollowed out, the uptake capacity of the samples increased sharply, and was proportional to the Cu content. Moreover, the optimal uptake was reached within only few hours. Furthermore, the uptake mechanism is proposed by characterization and analysis of the composites after uptake. Cu-based adsorbents have higher uptake performance when solutions are exposed to air, which further verified the proposed uptake mechanism. Finally, hollow Cu-based adsorbents exhibit excellent selectivity for I anions in the presence of large concentrations of competitive anions, such as Cl, SO42− and NO3, and function well in an acidic or neutral environment. Therefore, this study is expected to promote the development of Cu-based adsorbents into a highly efficient adsorbent for the removal of iodide from solutions. View Full-Text
Keywords: Cu-based adsorbent; hollow structure; iodide; uptake; air Cu-based adsorbent; hollow structure; iodide; uptake; air
Show Figures

Graphical abstract

MDPI and ACS Style

Mao, P.; Jiang, J.; Pan, Y.; Duanmu, C.; Chen, S.; Yang, Y.; Zhang, S.; Chen, Y. Enhanced Uptake of Iodide from Solutions by Hollow Cu-Based Adsorbents. Materials 2018, 11, 769.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop