Self-supported trimetallic NiZnLa nanosheets on hierarchical porous graphene oxide-polymer composite fibers for enhanced phosphate removal from water

Kong，Lingchao1; Yan，Qinlin1; Wang，Yi2; Wang，Qinyu3; Andrews，Charles B.1,4; Zheng，Chunmiao1,5

2022-12-15

10.1016/j.jcis.2022.08.093

JOURNAL OF COLLOID AND INTERFACE SCIENCE   Impact Factor & Quartile

0021-9797

1095-7103

Phosphate-induced water eutrophication has attracted global attention. Fabricating adsorbents with both high phosphate adsorption affinity and accessible separation property is challenging. Herein, PG@NZL, a hierarchical nanocomposite fibrous membrane, was fabricated via in-situ growth of La-doped NiZn-LDH (NiZnLa) over electrospun graphene oxide-polymer composite fibers (PG). The porous surface of the PG fibers provided abundant anchor sites for the vertical self-supported growth of NiZnLa nanosheets, contributing to a high surface area. The La-doped NiZnLa trimetallic LDH achieved a much higher adsorption capacity than NiZn-LDH. The negative adsorption energy (-1.45 eV), calculated with DFT, confirmed its spontaneous adsorption potential for phosphate. Interestingly, the PG fibers contributed to oxygen vacancies and the metal center electronic structure evolution of NiZnLa, thus strengthening the coordination with phosphate. Mechanistic analysis revealed that the high adsorption capacity of PG@NZL is attributed to its superior anion exchange property, oxygen vacancies, and inner-sphere complexation. Therefore, the flexible and easily separated PG@NZL nanocomposite fibrous membrane is a promising adsorbent for effectively treating phosphate-bearing wastewater.

Electronic structure evolution Graphene oxide doping Nanofiber composites Phosphate adsorption Trimetallic layered double hydroxides

SCI ; EI

English

First ; Corresponding

China Postdoctoral Science Foundation[2020 M682778] ; National Natural Science Foundation of China[41931292] ; Special Funding Project for Science and Technology Innovation Strategy of Guangdong Province[pdjh2021c0036] ; Shenzhen Science and Technology Innovation Committee["JSGG20210802153010033","JCYJ20200109141437586"]

Chemistry

Chemistry, Physical

WOS:000863111600007

ACADEMIC PRESS INC ELSEVIER SCIENCE

20223512630530

Adsorption ; Composite membranes ; Electrospinning ; Eutrophication ; Fibers ; Graphene ; Nanocomposites ; Nanosheets ; Oxygen vacancies ; Ternary alloys ; Wastewater treatment ; Zinc alloys

Industrial Wastes Treatment and Disposal:452.4 ; Zinc and Alloys:546.3 ; Nanotechnology:761 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Fiber Chemistry and Processing:819.3 ; Solid State Physics:933 ; Crystalline Solids:933.1

CHEMISTRY

2-s2.0-85136472128

Scopus

1.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science & Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.State Key Laboratory of Urban Water Resource and Environment (SKLUWRE),School of Environment,Harbin Institute of Technology,Harbin,150090,China
4.S.S. Papadopulos & Associates,Inc.,Rockville,20852,United States
5.EIT Institute for Advanced Study,Ningbo,Zhejiang,315200,China

Kong，Lingchao,Yan，Qinlin,Wang，Yi,et al. Self-supported trimetallic NiZnLa nanosheets on hierarchical porous graphene oxide-polymer composite fibers for enhanced phosphate removal from water[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2022,628:807-818.

Kong，Lingchao,Yan，Qinlin,Wang，Yi,Wang，Qinyu,Andrews，Charles B.,&Zheng，Chunmiao.(2022).Self-supported trimetallic NiZnLa nanosheets on hierarchical porous graphene oxide-polymer composite fibers for enhanced phosphate removal from water.JOURNAL OF COLLOID AND INTERFACE SCIENCE,628,807-818.

Kong，Lingchao,et al."Self-supported trimetallic NiZnLa nanosheets on hierarchical porous graphene oxide-polymer composite fibers for enhanced phosphate removal from water".JOURNAL OF COLLOID AND INTERFACE SCIENCE 628(2022):807-818.