Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 33, Pages 29736-29745Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b06041
Keywords
lattice defect; arsenic; zirconium oxide; adsorption; water treatment
Funding
- National Natural Science Foundation of China [51678285]
- National Key Research and Development Program of China [2018YFC0406405]
- 5511 Innovative Research Team of Science and Technology of Jiangxi Province [20165BCB19008]
- Key Project of Science and Technology of Jiangxi Province [20173ABC28010]
- Science and Technology Project of the Education Department of Jiangxi Province [GJJ170620]
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Zirconium oxide (ZrO2) nanoadsorbents exhibit great potential in the remediation of arsenic-polluted water. However, physicochemical structure adsorption performance relationship is not well-understood, which retards further development of high-performance ZrO2 nanoadsorbents. Herein, a facile-controlled crystallization strategy was developed to synthesize defective ZrO2 with the assistance of organic ligands. Systematic characterizations showed that this proposed synthesis strategy can be exploited to regulate the defective density of ZrO2, whereas other structural properties remain almost unchanged. Batch adsorption experiments exhibited that UiO-66-SH-A with a higher lattice defect possessed a larger capacity and a faster rate for the uptake of As(III)/As(V). The maximum capacities of UiO-66-SH-A to uptake As(III) and As(V) were up to 90.7 and 98.8 mg/g, respectively, which are 12.3 and 11.5 times larger than those of UiO-66-A. These results from the structure-performance analysis and theoretical calculations further reveal that lattice defect plays a key role in the enhancement of arsenic adsorption on ZrO2. We hope this new understanding of the structure-dependent adsorption performance will provide a valuable insight for designing Zr-based nanoadsorbents to capture arsenic.
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