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使用MOFs纳米复合材料UiO-66-NH/GO@PVA从水溶液中有效吸附甲基橙

Effective Adsorption of Methyl Orange from Aqueous Solution Using MOFs Nanocomposites UiO-66-NH/GO@PVA.

作者信息

Van Thang Vu, Nguyen Nguyen Tran Duy, Nguyen Phi Long, Phung Thi Viet Bac

机构信息

Center for Environmental Intelligence and College of Engineering and Computer Science, Vin University, Hanoi 100000, Vietnam.

Department of Chemistry, Soongsil University, Seoul 06978, South Korea.

出版信息

ACS Omega. 2025 Aug 28;10(35):40162-40173. doi: 10.1021/acsomega.5c04958. eCollection 2025 Sep 9.

DOI:10.1021/acsomega.5c04958
PMID:40949227
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12423971/
Abstract

The persistent contamination of water resources by synthetic dyes poses a critical global environmental challenge, necessitating the development of efficient and sustainable remediation technologies. This study presents a novel UiO-66-NH/GO/PVA composite for the effective removal of methyl orange (MO) from water solutions. The composite was created by combining graphene oxide (GO) and UiO-66-NH in a poly-(vinyl alcohol) (PVA) matrix, creating a stable and very porous structure. Adsorption studies, fitted to the Langmuir isotherm model ( = 0.9439), revealed a maximum capacity of 188.63 mg/g, with an optimal removal efficiency of 99.6% achieved at an initial MO concentration of 100 mg/L and pH 5. Kinetic analysis confirmed a pseudo-second-order mechanism ( = 0.9930), indicating chemisorption as the dominant process, while thermodynamic data confirmed the adsorption as both endothermic and spontaneous. The material demonstrated robust reusability, retaining over 95% efficiency after four regeneration cycles. These findings position UiO-66-NH/GO@PVA as a promising, eco-friendly adsorbent for wastewater treatment, with future research planned to evaluate its performance in real or simulated wastewater systems, addressing practical applicability.

摘要

合成染料对水资源的持续污染构成了严峻的全球环境挑战，因此需要开发高效且可持续的修复技术。本研究提出了一种新型的UiO-66-NH/GO/PVA复合材料，用于从水溶液中有效去除甲基橙（MO）。该复合材料是通过在聚（乙烯醇）（PVA）基质中结合氧化石墨烯（GO）和UiO-66-NH制备而成，形成了一种稳定且孔隙率很高的结构。吸附研究拟合朗缪尔等温线模型（R² = 0.9439），结果显示最大吸附容量为188.63 mg/g，当初始MO浓度为100 mg/L且pH值为5时，最佳去除效率达到99.6%。动力学分析证实为拟二级反应机制（R² = 0.9930），表明化学吸附是主要过程，而热力学数据证实吸附过程是吸热且自发的。该材料表现出强大的可重复使用性，经过四个再生循环后仍保持超过95%的效率。这些研究结果表明UiO-66-NH/GO@PVA是一种有前景的、环保型废水处理吸附剂，未来计划开展研究以评估其在实际或模拟废水系统中的性能，解决实际应用问题。

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