为较全面地展示MOFs材料在环境污染控制领域的研究进展并服务于同行，NMTer课题组每周收集整理“MOFs基材料用于环境污染控制”方面的文献资料，通过“MOFs帮助环境”公众号推送。欢迎各位老师和同学关注！同时，欢迎各位老师将您的相关成果在本公众号做专题推送宣传。“赠人玫瑰，手有余香”！

题目：Fabrication strategies of metal-organic frameworks derivatives for catalytic aqueous pollutants elimination 

作者：Fei Wang, Ya Gao, Shan-Shan Liu, Xiao-Hong Yi, Chong-Chen Wang*, Huifen Fu.

摘要：Metal-organic frameworks (MOFs) derivatives have attracted widespread attentions due to their outstanding merits like large BET surface area, tunable porosity, unsaturated active sites inherited from MOFs precursors and higher water/thermal stability. Up to now, MOFs derivatives, as emerging catalytic materials with above-mentioned merits, were widely applied in catalytic removal pollutants from water. This review systematically summarized the fabrication strategies of MOFs derivatives (metal oxides, metal-carbon composites, metal sulfides, metal phosphides, metal selenides, metal nitrides and metal free carbon materials), in which the relationships between the various factors in different preparation methods (pyrolysis, sulfuration, phosphorization and selenylation) and the physicochemical property of MOFs derivatives was clarified. The recent progress of MOFs derivatives for catalytic aqueous pollutants removal was highlighted. Furthermore, the reaction mechanisms and unique features of various catalysis processes over MOFs derivatives for pollutants removal were summarized in detail. As well, the immobilized MOFs derivatives on some specific structure accomplished continuous operation for catalytic removal pollutants were presented. Finally, the outlooks of the preparation of MOFs derivatives and applications in catalytic removal pollutants were proposed. 

期刊信息：Chem. Eng. J. 

题目： Hollow cavity engineering of MOFs-derived hierarchical MnO_x structure for highly efficient photothermal degradation of ethyl acetate under light irradiation

作者：Jun Li, Shengpeng Mo*, Xuegang Ding, Lili Huang , Xiaobin Zhou, Yinming Fan, Yanan Zhang, Mingming Fu, Qinglin Xie*, Daiqi Ye*.

摘要：The designed synthesis of hollow-structure catalysts is central for enhancing the absorption and utilization of light irradiation, which is the core process of improved photothermal catalytic activity of VOCs. Herein, we introduced a viable cavity engineering for the fabrication of hollow MnO_x-m architectures with a well-defined central space by in situ polyvinylpyrrolidone (PVP)-assisted Mn-BTC self-aggregation. The optimized MnOx-100 catalyst with hollow cavity environment exhibited approximately 96% ethyl acetate degradation toward CO₂, stability and moisture resistance under light irradiation, which was much better than the traditional Mn-based MOFs derivatives (MOF-74-O and MIL-100-O). Combined experiment and DFT calculations, the more exposed Mn⁴⁺ sites in the MnO_x-100 catalyst through a hollow cavity engineering could provide abundant adsorption sites, lower temperature reducibility and narrower band gap, and its hollow structure endowed with significant advantages for the separation efficiency of photogenerated carriers and light absorption capacity. Moreover, coexistence of photocatalysis, thermocatalysis and photoactivation in this catalyst system synergistically participated in the light-driven photothermal catalytic ethyl acetate oxidation. Finally, in situ DRIFTS results revealed that the introduction of light could change the possible reaction pathway of ethyl acetate degradation over the MnO_x-100 catalyst, and aldehyde and ethylene were generated as by-products or non-critical intermediates under light irradiation. The main degradation pathway of ethyl acetate degradation occurred through ethyl acetate → aldehyde, ethanol and acetic acid → methanol and formic acid → CO₂ and H₂O. 

期刊信息：Chem. Eng. J. 

DOI：10.1016/j.cej.2023.142412

论文链接：

题目：A green hydrothermal synthesis of polyacrylonitrile@carbon/MIL-101(Fe) composite nanofiber membrane for efficient selective removal of tetracycline

作者：Yakun Teng, Wenyan Li, Jing Wang, Shushu Jia, Hao Zhang, Tianyi Yang, Xiang Li*, Lijuan Li, Ce Wang.

摘要：Developing highly efficient, low-cost and reusable adsorbents toward antibiotics is a great challenge for the treatment of wastewater. Here, a polyacrylonitrile@carbon/MIL-101(Fe) composite nanofiber membrane (PAN@C/MIL-101(Fe)) has been prepared for the first time via the combination of electrospinning technique and green hydrothermal method and showed a high adsorption performance toward tetracycline (TC). The MIL-101(Fe) nanocrystals were uniformly grown in-situ on the surface of activated hydrothermal carbon coated electrospun PAN nanofiber membrane. The incorporation of hydrothermal carbon and MIL-101(Fe) in nanofiber membrane obviously enhanced its adsorption ability. The adsorption process followed pseudo-second-order kinetic model and Freundlich isotherm model, with an adsorption capacity of 392.64 mg/g for TC. Moreover, the PAN@C/MIL-101(Fe) exhibited high selectivity and good regenerability, and the removal efficiency remained above 94% after five cycles. After the real wastewater filtration experiment, chemical oxygen demand (COD) concentration of TC significantly decreased from 155.55 mg/L to 51.84 mg/L, which is below the standard of wastewater discharge (GB 21904-2008). This study provides a promising green strategy for uniform MOFs modified carbon coating nanofiber membrane adsorbent, which has potential application in practical antibiotic wastewater treatment.

期刊信息: Sep. Purif. Technol.

DOI: 10.1016/j.seppur.2023.123610

论文链接：

题目：Ambient temperature NO₂ removal by reversible NO₂ adsorption on copper-based metal-organic frameworks (MOFs)-derived nanoporous adsorbents

作者：Mingzhe Sun, Aamir Hanif*, Tianqi Wang, Qinfen Gu, Jin Shang*.

摘要：Nitrogen dioxide (NO₂) is a potent atmospheric pollutant generated from fossil fuel combustion at power plants, industrial plants, and vehicles, which raises serious health concerns (e.g., respiratory diseases) and contributes to severe environmental pollution issues (e.g., acid rain and ground-level ozone). Adsorption is an efficient approach for ambient temperature NO₂ removal, whose efficiency highly depends on the design of the adsorbents. The widely reported activated carbon adsorbents suffer from low and typically irreversible NO₂ capacity apart from co-generation of considerable amounts of polluting NO (up to 50% of adsorbed NO₂), which is released back into the atmosphere. Herein we report copper-based metal-organic framework (MOF)-derived carbon materials (i.e.,Cu@C(CuBTC) and Cu@C(CuBDC)) featuring high NO₂ capacity coupled with minimal release of NO and outstanding reusability for NO₂ removal under ambient temperature. Both Cu@C(CuBTC) and Cu@C(CuBDC) showed an impressive improvement (up to 13.5 times) in NO₂ capacity over their pristine MOFs counterparts, with Cu@C(CuBTC) showing the highest NO₂ capacity (4.97 mmol/g) and minimal (< 20 % of adsorbed NO₂) release of NO in this study. Such a massive improvement in the NO₂ capacity of carbonized composites is attributed to highly active and homogenously dispersed Cu nanoclusters, which serve as adsorption sites and play the dominant role in NO₂ removal. Further, for the first time, Cu@C(CuBTC) exhibited outstanding reusability for NO₂ removal under humid conditions, reflected by stable NO₂ capacity in the cyclic adsorption tests (5 cycles), suggesting a great potential for real-world applications. This study provides a general and facile strategy for designing highly dispersed, water-resistant, and stable copper nanoclusters on carbon support for efficient adsorptive removal of various toxic gases under ambient temperature.

期刊信息：Sep. Purif. Technol.

DOI: 10.1016/j.seppur.2023.123563

论文链接：

题目：Robust 2D porphyrin metal–organic framework nanosheets for high-efficiency photoreduction-assisted uranium recovery from wastewater

作者：Tao Liu, Jie Wang, Tao Wei, Mengwei Chen, Anping Gu, Xi Guo, Ning Wang*.

摘要：The elimination of highly radioactive and chemically toxic uranium from nuclear waste is of significance for radionuclide remediation and environment protection. Herein, two-dimensional (2D) porphyrin-based nickel (Ni-TCPP) metal–organic frameworks (MOFs) are successfully prepared by a simple surfactant-assisted strategy. Owing to highly accessible active sites and low diffusion barrier, 2D Ni-TCPP nanosheets present fast uranium capture by coordination of uranyl ions with TCPP ligands and Ni paddlewheel metal nodes. Particularly, 2D Ni-TCPP nanosheets display outstanding photocatalytic activity due to the merit of dual ligand-to-metal charge transfer pathways, greatly improving photoreduction-assisted uranium recovery performance. As a result, light-irradiated 2D Ni-TCPP adsorbents display fast removal of uranium from acidic wastewater, excellent selectivity and good reusability. Moreover, a high uranium removal rate can be maintained even in the presence of excess calcium ions. These advantages combined with good structure stability make 2D Ni-TCPP MOFs promising for selective uranium separation in nuclear waste remediation.

期刊信息: Sep. Purif. Technol.

DOI: 10.1016/j.seppur.2023.123601

论文链接：

本期编辑

魏羽玮，女，北京建筑大学环境工程专业2022级硕士研究生。主要研究方向为金属-有机骨架材料的设计与制备及其在水环境修复方面的研究。

扫描下方二维码|关注我们

新型环境修复材料与技术课题组

课题组网站链接：http://nmter.bucea.edu.cn