首页|Defective NH2-UiO-66 for effective Pb(Ⅱ)removal:Facile fabrication strategy,performances and mechanisms

Defective NH2-UiO-66 for effective Pb(Ⅱ)removal:Facile fabrication strategy,performances and mechanisms

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Defective NH2-UiO-66 adsorbent(named as NH2-UiO-66-SD)was successfully fabricated via post-synthesis method with the aid of both sodium carbonate anhydrous(Na2CO3)and diethylenetriaminepentaacetic acid(DTPA),in which the defective structure was confirmed by various characterizations.The as-obtained defective NH2-UiO-66-SD exhibited outstanding Pb(Ⅱ)sorption capacity(172.21 mg g-1)and rapid diffusion rate(29.87 mg g-1 min-0.5)at room temperature with optimal pH being 5.47.The Pb(Ⅱ)sorption behavior was conformed to pseudo-second-order kinetics and Langmuir model,demonstrating that the chemical sorption of the monolayer played a dominant model.As well,the thermodynamic parameters like standard Gibbs free energy change ΔGo(-31.21 kJ mol-1),standard enthalpy change ΔHo(12.79 kJ-1 mol-1)and standard entropy change ΔSo(146.73 J mol-1 K-1)revealed that the Pb(Ⅱ)sorption process of NH2-UiO-66-SD was spontaneous,endothermic and disordered.Furthermore,the NH2-UiO-66-SD exhibited desirable desorption and recirculation performances(removal efficiencies>85%in 5 runs)with ideal stability.Moreover,the Pb(Ⅱ)sorption mechanism of NH2-UiO-66-SD mainly included the electrostatic attractions and coordinative interactions.Overall,this work offered an intriguing method of fabricating defective NH2-UiO-66 adsorbent,which vastly enhanced adsorption efficiency for toxic metal ions elimination from wastewater.

NH2-UiO-66DefectAdsorptionPb(Ⅱ)Mechanism

Meng-Yuan Liu、Lu Zhang、Yu-Hang Li、Chong-Chen Wang、Peng Wang、Chen Zhao、Huifen Fu

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Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation,School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaBeijing Natural Science FoundationR&D Program of Beijing Municipal Education CommissionR&D Program of Beijing Municipal Education CommissionCultivation project Funds for Beijing University of Civil Engineering and ArchitectureDoctor Graduate Scientific Research Ability Improvement Project of Beijing University of Civil Engineering and ArchitectureBUCEA Post Graduate Innovation Project

22176012518780238202016KM202310016007KM202110016010X23034DG2023014PG2023057

2024

10.1016/j.pnsc.2024.04.009

自然科学进展·国际材料(英文)
国家自然科学基金委员会

自然科学进展·国际材料(英文)

影响因子：0.25
ISSN：1002-0071
年,卷(期)：2024.34(2)
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