SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Wenlan Ji,Weiwei Li,Yuan Wang,Tian C. Zhang,Shaojun Yuan
The urgent need to remove arsenic from groundwater stems from the irreversible damage it causes to aquatic systems and biological health. In this study, unique magnetic Fe 3 O 4 /graphene oxide (GO) nanocomposites derived from MIL-100(Fe)/GO precursor were rationally and precisely developed by combination of solvothermal synthesis and pyrolysis methods. The optimized MIL-100(Fe)/1%GO-400 magnetic nanocomposite (where 1% and 400 represent the mass ratio of GO to MIL-100(Fe) and pyrolysis temperature, respectively) exhibited exceptional adsorption capacity for As(V) and possessed magnetic separation properties. The novel nanocomposite had complete MOF morphology and crystal structure, as well as good resistance to interference from ions and could be used effectively over a wide pH range (2–9) for adsorption of As(V). The As(V) adsorption on the nanocomposite was found to follow the pseudo-second-order (PSO) kinetic model and Temkin adsorption isotherm model, as well as a spontaneous endothermic process dominated by chemisorption. The incorporation of GO and pyrolysis of the Fe-MOFs was proven to enhance the adsorption capacity of nanocomposite, water stability, and magnetic recovery ability. The adsorption mechanism was attributed to the synergistic effect of chemical complexation, hydrogen binding and electrostatic interaction. This work not only presents a feasible strategy for the development of Fe-MOFs-based derivatives, but also offers a promising approach to expanding the application of functional Fe-MOFs-based derivatives in arsenic-contaminated wastewater treatment.
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ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Tao Zhang,Yaming Sun,Xiaxing Feng,Jingna Li,Wenjie Zhao,Guoqiang Xiang,Lijun He,Shusheng Zhang
Background The development of efficent chromatographic stationary phases (SP) with mixed-mode or multiple interactions in high-performance liquid chromatography (HPLC) for the separation of complex samples is a challenging task. Metal organic frameworks (MOFs)-based SP can provide desired multiple interactions and enable the separation of a diverse range of solutes, but have limitations of low column efficiency and poor stability. Results Herein, the hybrid MOFs@Covalent organic frameworks (COFs) materials were used as SP in HPLC due to their synergistic structural features. The SiO 2 @NH 2 -UiO-66@CTF SP was synthesized by integration of NH 2 -UiO-66 and covalent triazine framework (CTF) onto silica surface. Due to the unique structure of SiO 2 @NH 2 -UiO-66@CTF with hierarchical-pores, this column showed higher column efficiency (up to 49,369 plates m −1 for alkylbenzenes) than the reported columns packed with MOFs-based SP. Owing to the Zr 4+ -N coordination bonding between CTF and NH 2 -UiO-66, the structural stability of SiO 2 @NH 2 -UiO-66@CTF can be improved. Furthermore, this new column exhibited remarkable column stability with relative standard deviation of retention time of <0.40% after 400 injections. With the combined advantages of multifunctional properties, high column efficiency, and good stability, SiO 2 @NH 2 -UiO-66@CTF SP showed excellent selectivity for the separation of a variety of hydrophobic, aromatic, heteroatomic, and hydrophilic analytes. Significance and novelty This work not only offers a promising SP with multiple retention mechanisms for HPLC, but also provides an efficient strategy for development of high column efficiency MOFs-based SP with good stability. Moreover, the MOFs@COFs hybrid materials were expanded in application area through this study, and the research results can also afford the foundation for further explore its structural characteristics.
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高影响因子
Advanced Healthcare Materials
·
2023
·Vol. 12
·期 30
·2300746
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IF 10
Jianwen Zhang,Xinyu Pei,Yihan Liu,Xianlan Ke,Ya Peng,Yajun Weng,Qinyong Zhang,Junying Chen
There is an urgent need to develop a series of multifunctional materials with good biocompatibility, high mechanical strength, hemostatic properties, antiadhesion, and anti-infection for applications in wound care. However, successfully developing multifunctional materials is challenging. In this study, two superhydrophobic composite coatings with good biocompatibility, high mechanical strength, strong antifouling and blood repellency, fast hemostasis, and good antibacterial activity are prepared on cotton fabric surface by simple, green, and low-cost one-step dip-coating technology. The results discussed in the manuscript reveals that the two superhydrophobic composite coatings can maintain good mechanical stability, strong water repellency, and durability under various types of mechanical damage, high-temperature treatment, and long-term strong light irradiation. The coatings also exhibit good repellency to various solid pollutants, highly viscous liquid pollutants, and blood. In vitro and in vivo hemostatic experiments show that both composite coatings have good hemostatic and anticlot adhesion properties. More importantly, this superhydrophobic coating prevents bacterial adhesion and growth and released Cu 2+ and Zn 2+ ions and chitosan to achieve bactericidal properties, thereby protecting injured skin from bacterial infection. The two superhydrophobic coatings enhance the antifouling, antiadhesion, hemostatic, and antibacterial functions of blood-repellent dressings and therefore have broad application prospects in medical and textile fields.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Caiyu Luo,Yan Lin,Yupei Zhang,Shuai Zhang,Shehua Tong,Shaohua Wu,Chunping Yang
Antibiotics in swine wastewater could lead to risks to the environment and human health, and it is a competitive alternative to degrade antibiotics via photocatalysis which is green and eco-friendly. However, charge separation efficiency and light absorption capacity have been key factors limiting the technology. In this work, we synthesized the novel photocatalysts of MOF-545/Ag 3 PO 4 via solvothermal methods, and examine the performance and mechanism for the degradation of oxytetracycline (OTC) in swine wastewater. The results showed that compared with Ag 3 PO 4 , the composite catalysts have stronger photoresponse and charge separation ability. MOF-545/Ag 3 PO 4 could completely degrade OTC within 3.0 min with a rate constant of 3.97 min −1 which is 12.9 times that of Ag 3 PO 4 . OTC removal was still 100% within 3.0 min after 5 cycles, which confirmed that the composite catalyst was stable. Data from free radical capture tests showed that photogenerated holes (h + ) and superoxide radicals (•O 2 – ) played a dominant role in OTC degradation. In-situ X-ray photoelectron spectroscopy (XPS) spectra and electron spin resonance (ESR) spectra proved the formation of an S-scheme heterojunction in MOF-545/Ag 3 PO 4 , which greatly improves the carrier separation efficiency of catalysts. This study provides a novel MOF-based catalyst for improving photocatalytic performance.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Bingzhang Li,Yao Meng,Xiaoxia Lin,Degui Tu,Shunxi Shen,Ting He,Yuqi Li,Hui Zhang
Difficulties in mineralizing organic dyes and antibiotics have been bottlenecks limiting wastewater treatment technology development. Electrocatalytic advanced oxidation through selective two-electron oxygen reduction on cathodes is a promising method of mineralizing organic wastewater. However, most developed cathodes cannot efficiently synthesize H 2 O 2 in situ via 2e − pathways and their durability cannot be guaranteed due to Fe 2+ leaching. Therefore, the electrospun cathode (MOFs (2Fe/Co)/CNF) with both photocatalytic and electrocatalytic functions was ingeniously fabricated for efficient degradation of dyes and antibiotics through graphene template effect, carbonization and in-situ growing strategies. On the cathode surface , H 2 O 2 was continuously generated in situ via 2e − reduction reactions, activating Fenton-like reactions. In addition, the developed cathode (MOFs (2Fe/Co)/CNF) had a low band gap (1.32 eV), which enhanced visible light response and improved catalytic active sites of the cathode. Degradation experiments of methylene blue and erythromycin solution indicate that the developed cathode showed excellent synergistic photoelectrocatalysis performance. In a photo-electro-Fenton system (PEF), the mineralization rate of methylene blue and erythromycin reached 86.5% and 90.2% within 10 and 30 min, respectively. The cathode in this research is expected to have great potential to efficiently mineralize wastewater via PEF.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaoyan Shi,Weiquan Liang,Guoping Liu,Bin Chen,Lianyi Shao,Yanxue Wu,Zhipeng Sun,Felipe García
The development of new energy-related materials is the pinnacle to attaining a sustainable society based on renewable energy. Over the past decades, plenty of electrode materials have been investigated seeking better energy storage properties. However, the often-tedious synthetic procedures and large amounts of solvents utilised during their syntheses incur high costs and severe environmental pollution. Here we present a solvent-free approach to metal–organic-frameworks/MXene-derived carbonaceous metal selenide/MXene composites with unique nanostructures rich in mesopores and macropores. These species can be readily transformed into high-performance electrode materials with enhanced Li/Na ion storage properties compared with their solution-based counterparts. Herein we report not only a unique metal–organic framework/MXene-derived electrode material displaying high-performance for advanced lithium/sodium storage applications but also its novel environmentally benign production process.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Dongdong Liu,Xiuming Liu,Kuanjun Fang,Jixian Gong,Shuai Zhang,Xiran Qiao,Jinkun Wang,Tianning Wang,Enzheng Xing
The use of auxiliaries for textile dyeing and printing and the release of residual dyeing liquor cause enormous harm to the environment, while the single function of dyed fabrics hinders their development in more advanced fields. In this work, zeolitic imidazolate framework-8 (ZIF-8) nanocrystals were grown in situ on carboxymethyl cotton fabric to absorb acid dyes without auxiliaries. To further improve its durability and color fastness, polymethylhydrosiloxane (PMHS) hydrophobic coating was used to protect its surface. The as-prepared cotton fabrics exhibited a K/S value of 21.78, a hydrophobic angle of 160.2° and a UPF value close to 50+. They showed high stability under various environmental conditions, which provided a simple and enviromental way to prepare multifunctional dyed textiles. The high hydrophobic angle of the fabric offered excellent adsorption of oil agent in the oil–water mixture, and the oil–water separation efficiency can still reach more than 95% even after 20 cycles, indicating that the fabric also had promising applications in the treatment of oiled wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liyan Chen,Meng Rong,Jiemiao Yu,Qiyu Meng,Shan Ni,Xia Wu,Li Wang,Huifang Xing,Huizhou Liu,Liangrong Yang
Due to the biotoxicity and ecological hazards of 2,4-toluene diamine (TDA) and 4,4′-methylene dianiline (MDA), it is the key process for upcycling polyurethane (PU) waste to remove them from the PU bio-hydrolysate with high selectivity and efficiency. Herein, MIL-53 series metal–organic frameworks (MOFs) were prepared and applied to remove aromatic diamines. Besides, the effects of their different structural units on the adsorption performance were investigated. Among the three metal nodes (Cr 3+ , Al 3+ , Fe 3+ ) of MIL-53, MIL-53(Al) demonstrated the highest adsorption capacities upon TDA (4.17 mmol/g) and MDA (2.00 mmol/g) due to its more μ 2 -OH sites and higher porosity. Compared with MIL-53(Al), DUT-4 and DUT-5 owned longer linkers but exhibited inferior aromatic diamine adsorption performance, which was ascribed to the more appropriate pore size and more μ 2 -OH sites of MIL-53(Al). Notably, MIL-53(Al) exhibited excellent selectivity towards aromatic diamines, while the removal efficiency reached over 90 %. In addition, spectral analysis before and after adsorption revealed the mechanism, which involved host–guest interactions, H-bonding interactions, and π-π stacking. The results indicate the great potential of applying the optimal MIL-53(Al) as an alternative adsorbent for removing hazardous aromatic diamines from the PU bio-hydrolysate.
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CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Yucheng Liu,Meng Zhu,Mingyan Chen,Lili Ma,Bing Yang,Lingli Li,Wenwen Tu
A nanocomposite of metal-organic frameworks (MOFs)-HKUST-1 based on graphene oxide (GO) was modified by polydopamine (PDA). These nanomaterials formed the PDA/RGO/HKUST-1 membrane over the surface of the commercial cellulose acetate membrane support layer to treat dye wastewater. The membranes were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The results showed enhanced membrane separation performance because of improved surface flatness and layer spacing. With the insertion of porous HKUST-1 and the cross-linking modification of PDA, the PDA/RGO/HKUST-1 membranes exhibited excellent flux, rejection, hydrophilic, and anti-fouling performance. The composite membrane could effectively reject methylene blue and Congo red, with removal rates of 99.8% and 89.2%, respectively. In addition, the flux of the PDA/RGO/HKUST-1 membrane increased 31-fold with the addition of HKUST-1 and PDA. Overall, the prepared high-flux composite membrane can be used as an excellent material in a variety of environmental applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Haoting Niu,Yong Zhang,Yu Liu,Na Xin,Weidong Shi
Exploring porous nano-structured materials has great significance for energy storage equipment. The metal-organic frameworks (MOFs) can be used as the outstanding sacrificial templates for electrode material of high performance supercapacitors due to their superior features that high specific surface area and tunable pore size distribution. However, the poor conductivity of MOFs is one of the biggest barriers to achieve high rate capacity and stable cycling performance. Herein, MOFs derived NiCo-layered double-hydroxide (NiCo-LDH) and nitrogen-doped carbon nanosheets (NC) on the flexible carbon nanotubes (CNTs) film are rationally designed, both of which as the binder-free electrodes can greatly improve the specific surface area and reaction sites. An asymmetric supercapacitor based on porous NiCo-LDH nanosheets on CNTs (CNT@NiCo-LDH) as the positive electrode and the NC nanosheets on carbon nanotubes film (CNT@NC) as the negative electrode exhibits the maximum energy density of 37.4 W h/kg at the power density of 750 W/kg, as well as a long-term cycling stability (94.5% capacity retention after 5000 cycles). Rationally design such combination is a meaningful process for energy storage equipment with excellent electrochemical performance.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Maru Dessie Walle,Mengyuan Zhang,Ke Zeng,Yajuan Li,You-Nian Liu
Despite their high energy density , low-cost, and low environmental impacts compared with the current state-of-the-art lithium-ion batteries, lithium–sulfur (Li S) batteries still suffer from the low sulfur content, dissolution of polysulfides and capacity loss, which hinder their commercial application. To address these issues, nitrogen-doped cubic carbon (NC) interwoven with carbon nanotubes (CNT) host is introduced to achieve high sulfur content for lithium–sulfur batteries. The NC/CNT composites are derived from metal–organic frameworks (MOFs), which can physically confine sulfur, thus providing efficient sulfur loading. The sulfur content in the as-obtained S@NC/CNT composite is as high as 89 wt%, while the cathode membrane has a sulfur loading of 3.6 mg cm − 2 . In addition, the NC/CNT composite can obstruct the dissolution and outward diffusion of polysulfides . Impressively, under the high sulfur content and high sulfur loading conditions, the S@NC/CNT cell exhibits initial specific capacity of 1141 mA h g − 1 at the current rate of 0.5C (837.5 mA g − 1 ) and the capacity retains 674.4 mA h g − 1 after 120 cycles. The S@NC/CNT cathode also shows high areal capacity (4.1 mA h cm − 2 ). The NC/CNT composite derived from MOFs has great potential applications for high‑sulfur loading cathodes.
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Catalysts
·
2019
·Vol. 9
·期 8
·682
·
IF 3.444
Wenjie Sun,Xiaomin Li,Chao Sun,Zhen Huang,Hualong Xu,Wei Shen
Metal organic frameworks (MOFs) have recently been used as precursors of the catalysts for the combustion of volatile organic compounds (VOCs). In the present work, three kinds of CeO2catalysts were successfully synthesized from Ce-MOF-808, Ce-BTC, and Ce-UiO-66, with specific topological structures and coordinate environments. Catalysts with small particle size, stacking mode, and structural defects could be created by pyrolysis of Ce-MOFs, which affects the activity in the toluene combustion significantly. Raman spectra, XPS, and OSC studies were performed to reveal the formation of defect sites. The thermal redox properties were determined by H2-TPR. Catalytic activity tests were conducted on the toluene combustion, and CeO2-MOF-808 showed the best catalytic performance (T90 = 278 °C) due to its having the largest specific surface area, abundant active surface oxygen species, and low-temperature reducibility.Keywords:Ce-MOF;cerium oxide;catalytic combustion of toluene;environmental catalysis;pyrolysis process
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