JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 28
·11486-11499
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IF 4.5
Jiang Yanxiao,Song Wei,Zhang Meng,Feng Yu,Liu Boyan,Zhang Hong,Kan Guangfeng,Yu Kai,Jiang Jie
In this study, metal–organic framework (MOF)-functionalized sponge columns were prepared using a simple approach by embedding melamine sponge in a homogeneous MOF solution and first applied in the removal of methyl orange dye from water samples. Various MOF materials (MIL-101(Cr), MIL-101(Fe), ZIF-8(Zn), HKUST-1(Cu), and MIL-68(Al)) with different structures were synthesized and used as coating materials for a blank sponge. This method not only can be used for a wide variety of MOF materials, but also can retain their unique properties. The results show that the sponge as an adsorbed base material can effectively simplify the separation procedures of adsorption. Under the optimal conditions, the prepared MOF/PVDF-sponge column had an excellent adsorption capacity (229.4 mg g −1 ) toward methyl orange and reached the equilibrium within 1 h. With simple one-step infiltration, excellent adsorption properties and simple operation, the MOF/PVDF-sponge column presents a promising commercial value. Moreover, this study provides a new approach for exploring functional porous sponges for adsorption of dyes from environmental water samples.
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Frontiers in Nutrition
·
2022
·
IF 6.59
Weifang Wang,Yunfeng Li,Guojing Han,Aimin Li,Xiaomei Kong
Background Asthma is a chronic disease, which is harmful to the health of the body and the quality of life. Supplementation of Lactobacillus can affect the immune environment of the lungs through the gut-lung axis. This study aimed to explore the potential regulatory targets of Lactobacillus to relieve inflammation in asthma and determine a new approach for improving asthma. Methods A mouse ovalbumin (OVA)-induced model was constructed. OVA mice were supplemented with Lactobacillus fermentum CECT5716 by gavage. The gut microbiota composition of normal and OVA mice was analyzed using 16S ribosomal DNA identification. BALF, serum, lung tissues, and duodenal tissues were collected. Wright’s staining was performed to determine the cell content of the alveolar lavage fluid. Hematoxylin-eosin staining, Masson staining, and periodic acid-Schiff staining were performed to observe the improvement in the lungs of OVA mice supplemented with Lactobacillus . Immunofluorescence was performed to measure the severity of the intestinal barrier leakage. Enzyme-linked immunosorbent assay was carried out to determine the expression levels of inflammatory cell factors, while quantitative reverse transcription-polymerase chain reaction and western blotting were performed to detect the levels of toll-like receptor 2 (TLR2)/TLR4 expression and cell adhesion factors. Results Compared with Control mice, OVA mice exhibited malignant conditions, such as intestinal leakage and lung edema. After supplementation with Lactobacillus , the inflammatory cell content in the bronchoalveolar lavage fluid decreased, and the inflammatory response was alleviated. The level of TLR2/TLR4 expression was reduced. The inflammatory cell infiltration in the airway mucosa of OVA mice was improved, alveolar swelling was reduced and the basement membrane appeared thinner. Conclusion The Lactobacillus inhibited the TLR2/TLR4 expression in OVA mice. Supplementation with Lactobacillus can alleviate the inflammatory response in OVA mice, inhibit pulmonary fibrosis, and treat asthma.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 25
·13378-13392
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IF 14.511
Panpan He,Huiying Bai,Zifen Fan,Liang Hao,Ning Liu,Bingyu Chen,Ran Niu,Jiang Gong
Interfacial solar-driven vapor generation is considered to be a promising technology to produce freshwater from non-potable water. However, when the source water contains organic pollutants, the solar-driven water evaporation process might worsen the pollution of the source water. Herein, we construct a bifunctional interfacial solar-driven evaporator by facilely dip-coating MOF-derived N/Co-doped carbon on cotton cloth, which can simultaneously realize freshwater production by solar-driven evaporation and the degradation of organic pollutants. The derived carbon hybrid is composed of wrinkled bamboo-like N-doped carbon tubes and embedded Co nanoparticles, which not only contribute to efficient sunlight absorption and photothermal conversion but also provide abundant catalytic sites for visible light-driven peroxymonosulfate (PMS) activation to produce diverse reactive oxygen species (ROS). In another aspect, the cotton cloth consisting of interlaced cellulosic fibers offers hydrophilic channels for fast water transport and decreases the water evaporation enthalpy to accelerate evaporation. As a result, the bifunctional evaporator presents a notably high evaporation rate of 2.2 kg m−2 h−1 under 1 kW m−2 illumination, securing one of the best values among solar evaporators. More importantly, it displays excellent performance in PMS activation under visible light irradiation to produce plenty of ROS for the catalytic degradation of various toxic organic pollutants in source water (e.g., its Congo red degradation efficiency was 96.6% within 90 min). The bifunctional solar evaporator provides an ingenious way to handle the issues of global freshwater scarcity and water contamination via the marriage of interfacial solar-driven evaporation technology and advanced oxidation processes.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Xiang Ke,Shuxian Tang,Zhiyun Dong,Hao Wang,Xinyuan Xu,Rongmin Qiu,Jiaojiao Yang,Jun Luo,Jianshu Li
Bioadhesives have gained considerable popularity for application in wound closure. However, applying bioadhesives incurs risks associated with bacterial infection during wound healing. Hence, in this study, a silk fibroin based bioadhesive was constructed via employing natural macromolecule, silk fibroin (SF), to spontaneously coassemble with natural plant polyphenol, tannic acid (TA), and iron oxide nanoparticles (Fe 3 O 4 NPs). In the system, the natural macromolecule SF plays a key role in fabricating the macromolecular network matrix due to the change of the secondary structure of SF (from random coil to β-sheet) under the trigger of TA. Importantly, the strong hydrogen bonding interactions between SF and TA, and the coordination bonds between TA and Fe 3 O 4 NPs endow the bioadhesive with high extensibility, self-healing properties, and considerable wet adhesion. Meanwhile, the synergy between the inherent photothermal properties of Fe 3 O 4 NPs and TA/Fe 3+ complexes under near-infrared (NIR) radiation enables the bioadhesive superior photothermal-reinforced antibacterial activity. The multifunctional natural macromolecule bioadhesive is a potential candidate in clinical wound management for improved outcomes, especially in infected wounds.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 9
·5438-5455
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IF 4.682
Liu Boyu,Liu Moxi,Xie Zhiyuan,Li Yiru,Zhang Aibo
Metal–organic frameworks (MOFs), a new type of porous functional material, have attracted widespread attention in the field of adsorption separation, medicine, and catalysis, etc., due to their unique adjustable pore structure and large specific surface. The defective zirconium-based MOF is rich in terminal Zr–OH induced by the lack of linkers and the μ3-OH originating from the Zr cluster, exhibiting high affinity for the carboxyl and sulfonic acid groups in the dyes. We report the performance of two defective zirconium-based MOFs (MOF-808 and MIL-140C) to remove Eosin y (EY), Methyl orange (MO), and Orange g from the water. Owing to the strong affinity, larger specific surface area, and better-matched pore structure, MOF-808 exhibits higher adsorption capacity for EY and MO, with maximum adsorption capacities of 661.7 mg g −1 and 532.4 mg g −1 , respectively. The adsorption kinetics, thermodynamics, adsorption cycle performance, and adsorption mechanism of two MOFs for three dyes were investigated. Adsorption thermodynamics and XPS analysis certified that both chemical adsorption and physical adsorption occur during the adsorption process, especially chemical adsorption. Desorption and regeneration tests demonstrate that both MOF-808 and MIL-140C maintained their high adsorption capacity after four cycles, indicating two MOFs are favorable candidates for removing pollutants. Graphical abstract
In this article, the adsorption performance of MOF-808 and MIL-140C on three different sizes and structures of anionic dyes is mainly studied. The results show that MOF-808 has better adsorption performance for EY and MO. At the same time, the adsorption results show that the chemical adsorption between the adsorbate and the MOFs material plays a leading role in the adsorption, resulting in a high adsorption capacity for EY, although the EY molecule has a larger molecular size.
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JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Yanqing Xu,Guibing Peng,Wenfei Li,Yuying Zhu,Zhaohuan Mai,Natalie Mamrol,Junbin Liao,Jiangnan Shen,Yan Zhao
Kevlar aramid nanofibers (KANF) are formed by the nanoscale structure of poly (paraphenylene terephthalamide) chains and are the emerging candidate for organic solvent permeation. However, the KANF membranes have a highly ordered and compact structure with few nanofluidic channels, resulting in low-efficiency solvent transport and undesirable membrane filtration. Here, the aligned composite membranes were fabricated by assembling the amino-polystyrene nanospheres (APN) into the KANF matrix and finally obtained a series of the APN@KANF membranes. These APN disrupted the KANF chain packing and increased the fractional free volume (from 27.7 to 35.6%). The ethanol permeance of the APN@KANF membrane was six times higher than the KANF membrane and maintained its rejection performance. Experiments and molecular simulations indicated that these APN increased the pore interconnectivity, which enhanced solvent permeability and molecular sieving. In addition, these highly stable and rigid resulting APN@KANF composite membranes could be used in extreme polar aprotic and nonpolar environmental conditions. This work highlights a promising application of the APN@KANF membranes in organic solvent nanofiltration .
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Wenhui Zhang,Haiming Song,Lijing Zhu,Gang Wang,Zhixiang Zeng,Xiaocheng Li
Thin-film composite (TFC) nanofiltration (NF) membranes efficiently remove dyes from wastewater. However, most of the membranes often sacrifice water flux for high rejection because of the trade-off between them. The demand for TFC membranes with high rejection and high water flux is increasing. Here, polyethylene (PE) membrane with a thickness of 7 µm was covered by polydopamine and polyethyleneimine (PDA/PEI), and then directly initiated interfacial polymerization (IP) with trimesoyl chloride (TMC), forming the dense and negatively charged polyamide-polyester selective layer. As the amount of PDA/PEI increases, the selective layer becomes denser, leading to the efficient removal of anionic dyes at high water flux. The water flux of the optimal membrane is 61.0 ± 18.3 L m −2 h −1 bar −1 , and the removal efficiency is 91.4 ± 0.8% for an anionic dye eosin Y (EY, M w = 691.9 Da), but poor decolorization for natural VB 12 (M w = 1355.4 Da). Moreover, the TFC membrane shows excellent selectivity for filtrating dye/NaCl mixture solution. The synergistic effect of adsorption-filtration control the removal of anionic dyes from wastewater in large flux. This work utilizes commercial PE porous substrate to fabricate TFC membrane having outstanding separation performance and a low thickness of about 7 µm.
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TALANTA
·
2022
·
IF 6.556
Ming Guan,Xiaojing Kang,Le Wei,Xingjun Hu,Chao Han,Xing Li,Hanwen Liu,Liang Qu,Zhenwen Zhao
Silk, as one of the representative artifacts of China, profoundly affects the communication between eastern and western civilizations, and dyes, as the color support of silks, reflected crucial historical, cultural and technological information. Surface enhanced Raman spectroscopy (SERS) characterized by vibrational information has been extensively employed in dye analysis. However, since natural plants with complex coloring compositions in ancient China were broadly applied in dying textiles, the existing SERS methods often misinterpret results in dye analysis. Besides, semi-quantification of each component was of great difficulty by SERS, limiting the exquisite comparative analyses of different historical samples. For the first time, a dual-mode strategy combining SERS with high mass resolution MALDI FTICR MS was developed in virtue of core-shell silver nanoparticles (AgNPs@PDA), which realized the precise identification and semi-quantification of complex dye mixtures, thus significantly improving the accuracy and applicability of traditional SERS method. Four typical dye components (alizarin, purpurin, berberine and indigo) have been identified and semi-quantified in unearthed dyed silks from Tang Dynasty based on the method. More interestingly, multiple dye components with different contents and their ratio could be precisely determined, which might help in further investigating their dyeing techniques. This dual-mode strategy represents a promising tool for providing solid support for cognition, evaluation and restoration of textile objects in museums and conservation centers.
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Biomaterials Science
·
2023
·Vol. 11
·期 14
·4930-4937
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IF 6.6
Birong Fan,Wan Peng,Yu Zhang,Pingsheng Liu,Jian Shen
Photodynamic therapy (PDT) is becoming an efficient antibacterial strategy without drug-resistance. Here, we report a promising reactive oxygen species (ROS) conversion strategy to increase the antibacterial efficiency of an Eosin Y (EOS)-based PDT system. Based on visible-light illumination, EOS generates a high concentration of singlet oxygen (1O2) in the solution. With the introduction of HEPES in the EOS system, it can almost completely convert 1O2 to hydrogen peroxide (H2O2). The orders-of-magnitude increases in the half-lives of the ROS (H2O2vs.1O2) present in the solution can enable more persistent oxidation ability. Thus, it is able to increase the bactericidal efficiency (against S. aureus) from 37.9% to 99.9%, promote the inactivation efficiency of methicillin-resistant S. aureus (MRSA) from 26.9% to 99.4%, and enhance the eradication rate of MRSA biofilm from 69% to 90%. Further in vivo investigation showed that the increased oxidation ability of the EOS/HEPES PDT system can enable quicker healing and maturing (even better than that for vancomycin administration) of MRSA-infected skin wounds on rats. This strategy may find many creative applications for the efficient eradication of bacteria and other pathogenic microorganisms.
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CHEMOSPHERE
·
2021
·
IF 7.086
Linfeng Zhang,Xianghui Wu,Jianding Li
To deal with the environmental pollution and energy crises, it is indispensable to find green and efficient means to overcome these challenges. Herein, the Sn-doped BiOI modified multi-shelled ZnO heterojunction composite with a high performance are designed and prepared. The results prove the formation of heterojunction structure in the composites and the morphology is shown as the multi-shelled microsphere. The performances of the composites are evaluated by different kinds of antibiotic degradation and H 2 -evolution under simulation sunlight irradiation. The measurements present that the Sn -BiOI/ZnO (SBZs) could completely remove ciprofloxacin (CIP) within 100 min, which is 4.18 times that of ZnO in kinetics. Typically, the degradation rate of CIP for SBZ6 is over 99.9%, which is more than 25% higher than that of pure ZnO microspheres. In addition, the rate of H 2 production could reach 3.08 mmol g −1 ∙ h −1 , which is 1.79 times of the pure ZnO microspheres. The boosted performance of the composites may originate from the enhanced electronic transmission efficiency and improved separation and recombination efficiency of electrons/holes. The charge transfer mode in the SBZs heterojunction composites is proposed and verified as the Z-scheme by the active species experimental and the possible electron transfer path analysis. Therefore, Sn -doped BiOI is introduced into multi-shelled ZnO microsphere to form contact heterojunction interfacial, which greatly improves the photocatalytic performances of the SBZs. Furthermore, this work supplies a strategy for designing and preparing highly active ZnO-based heterojunction composites, which could effectively address the challenges of environmental remediation and clean energy production.
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GREEN CHEMISTRY
·
2021
·Vol. 24
·期 3
·1335-1341
·
IF 10.182
Wenyan Zhang,Hangmin Guan,Yingfei Hu,Wei Wang,Linyun Hao,Xiaoli Yang,Wenjie Tian
With the dramatic increase in the application of modern office equipment, such as laser printers and photocopiers, large amounts of waste toner powder are used and discarded, ending up in landfills around the world. As waste toner powder contains hazardous compounds that can seriously endanger both the environment and human health, it is urgent to deal with waste toner powder and convert it into high value-added products. In this work, we report, for the first time, visible-light-driven hydrogen production with waste toner activated by cheap Ni species (waste toner@Ni-species) as the photocatalyst. The Ni species adhered to the waste toner through in situ photoreduction, without sophisticated equipment. It is found that the Ni species were composed of metallic Ni and oxidized Ni, which worked in synergy to remarkably enhance the photocatalytic activity of the waste toner. Activated by the Ni species, the hydrogen evolution rate of the waste toner was accelerated by up to 62 times, and the apparent quantum efficiencies (AQEs) of the waste toner were boosted by up to 64 times. In addition, the waste toner@Ni-species exhibited a higher charge separation efficiency, faster interfacial charge transfer rate and ∼200 mV lower barrier for proton reduction than those of the pristine waste toner. In addition to these merits, the waste toner@Ni-species could be separated conveniently from the aqueous system using magnetic attraction, as the saturation magnetization and residual magnetism of the waste toner were improved with the assembly of the Ni species. The approach shown here indicates a simple and promising way to deal with waste toner by converting it to a cost-effective photocatalyst for producing clean energy.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Youlin Wu,Haiyan Zhang,Youji Li,Zhiliang Jin
2D Cu 2 S snowflakes and 2D Ni-MOFs flakes were synthesized by hydrothermal method , and Ni-MOFs were calcined with sodium hypophosphite at 200 °C to form Ni-MOFs-P (Ni-MOFs/Ni 2 P). In the physical mixing process, since the -formation temperature of Cu 2 S is at 80 °C, the physical mixing temperature was controlled at 80 °C, which is advantageous for achieving a close 2D/2D contact. The results showed that 15 vol% TEOA with pH = 10 was used as sacrificent reagent under 5 W LED simulated visible light. 20 mg of EY was used as a photosensitizer . CNP60 had the best hydrogen evolution performance within 5 h, which was 3122.76 μmol g −1 h −1 . The hydrogen evolution rate of CNP60 is 8.72 fold, 3.37 fold, and 91.85 fold faster than that of Ni-MOFs, Ni-MOFs-P, and Cu 2 S, respectively. Ni-MOFs phosphating and Cu 2 S loading can reduce the photocatalyst's photogenerated electron and hole recombination efficiency. This significant improvement was achieved through XRD, SEM, TEM , XPS , UTV-Visible DRS , transient photocurrent , steady-state fluorescence, short fluorescence, related substance reporting studies, radical hydroxyl trapping, and more. The results show that the 2D/2D assembled CNP can effectively enhance the ability to reduce H∗, and a possible photocatalytic hydrogen production mechanism is proposed.
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