Effect of different MoS2 morphologies on the formation and performance of adsorptive-catalytic nanocomposite membranes

IF 10.4 1区工程技术 Q1 ENGINEERING, CHEMICAL

npj Clean Water Pub Date : 2024-07-13 DOI:10.1038/s41545-024-00360-3

Delal E. Al Momani, Fathima Arshad, Inas Taha, Dalaver H. Anjum, Linda Zou

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Abstract

This study synthesized three MoS₂ morphologies—nanospheres, nanoplatelets, and nanosheets—under varied conditions and incorporated them into chitosan membranes. TEM confirmed unique morphologies and crystallinity. Clean water flux showed that the nanoplatelet (P-CM) membrane had the highest flux due to higher porosity. The P-CM membrane excelled in removing Mn²⁺ and Zn²⁺ ions, achieving 93.0 ± 0.5% and 90.4 ± 1.5% removal, outperforming membranes with nanospheres (S-CM) and nanosheets (T-CM). Its superior performance is attributed to thicker nanoplatelets forming more water channels. The MoS₂‘s tri-layered structure generated reactive oxygen species (ROS) via H₂O₂ catalysis, contributing to enhanced heavy metal removal. These adsorptive-catalytic membranes combine adsorption with catalytic decomposition of heavy metals, highlighting the work’s novelty and superior performance. The membranes demonstrated excellent flux recovery and reusability (96.0 ± 0.5% for P-CM) after chemical cleaning. The findings emphasize the impact of nanomaterial morphologies on membrane performance in water treatment and environmental remediation.

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不同 MoS2 形貌对吸附催化纳米复合膜的形成和性能的影响

本研究在不同条件下合成了三种 MoS₂形态--纳米球、纳米板和纳米片，并将其纳入壳聚糖膜中。TEM 证实了其独特的形态和结晶度。净水通量显示，由于孔隙率较高，纳米片（P-CM）膜的通量最高。P-CM 膜在去除 Mn²⁺ 和 Zn²⁺ 离子方面表现出色，分别达到 93.0 ± 0.5% 和 90.4 ± 1.5%，优于纳米球膜（S-CM）和纳米片膜（T-CM）。其优异的性能归功于较厚的纳米片形成了更多的水通道。MoS₂ 的三层结构通过 H₂O₂ 催化作用产生活性氧 (ROS)，从而提高了重金属去除率。这些吸附催化膜将重金属的吸附和催化分解结合在一起，突出了这项工作的新颖性和卓越性能。这些膜在化学清洗后表现出极佳的通量恢复和重复利用率（P-CM 为 96.0 ± 0.5%）。研究结果强调了纳米材料形态对水处理和环境修复中膜性能的影响。

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来源期刊

npj Clean Water Environmental Science-Water Science and Technology

CiteScore

15.30

自引率

2.60%

发文量

审稿时长

5 weeks

期刊介绍： npj Clean Water publishes high-quality papers that report cutting-edge science, technology, applications, policies, and societal issues contributing to a more sustainable supply of clean water. The journal's publications may also support and accelerate the achievement of Sustainable Development Goal 6, which focuses on clean water and sanitation.