AUTHOR=Peng Dengzeyu , Fan Xin , Fang Dong 

TITLE=High-efficiency adsorption of Cd2+ and Cr3+ by sodium vanadate nanowire arrays

JOURNAL=Frontiers in Materials

VOLUME=10

YEAR=2023

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2023.1302072

DOI=10.3389/fmats.2023.1302072

ISSN=2296-8016

ABSTRACT=<p>With the development of economy, the problem of heavy metal pollution in water environment is becoming more and more serious, so it is urgent to find a kind of efficient water purification material. The current work aimed to investigate the potential power of sodium vanadate nanowire arrays (Na<sub>5</sub>V<sub>12</sub>O<sub>32</sub>) to remove cadmium (Cd<sup>2+</sup>) and chromium (Cr<sup>3+</sup>) from simulated aqueous solutions. The adsorption effects of Na<sub>5</sub>V<sub>12</sub>O<sub>32</sub> on Cd<sup>2+</sup> and Cr<sup>3+</sup> under different adsorption conditions were analyzed. The products before and after adsorption were compared by XRD, SEM, TEM, FTIR and XPS. The results showed that the irregular grass-like structure of Na<sub>5</sub>V<sub>12</sub>O<sub>32</sub> nanowire arrays provided more active sites for the ion exchange reaction, and the maximum adsorption capacity of Cd<sup>2+</sup> and Cr<sup>3+</sup> was 541.2 and 251.8 mg·g<sup>-1</sup>, respectively. The pseudo-second-order kinetic model was more suitable to describe the adsorption behavior by kinetic study. The research demonstrated that Na<sub>5</sub>V<sub>12</sub>O<sub>32</sub> nanowire arrays exhibited excellent adsorption performance, which provided an effective parameter basis for the future adsorption of heavy metal ions.</p>