POLYMER DEGRADATION AND STABILITY
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2023
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IF 5.9
Jingsheng Wang,Xi Chen,Jun Wang,Shuang Yang,Kaiwen Chen,Lu Zhu,Siqi Huo,Pingan Song,Hao Wang
Carbon fiber reinforced polymer (CFRP) composite is a kind of lightweight material with excellent comprehensive properties, but low production efficiency and inherent flammability have become two crucial limitations for its further application. Herein, two phosphorus-derived imidazoliums (CEPM-1 and CEPM-2) were synthesized by aqueous self-assembly, and applied to flame-retardant, one-component epoxy resins (EPs). Moreover, the well-designed EPs (EP/CEPM-1–25 and EP/CEPM-2–20) were used as resin matrixes for CFRP. Both EPs featured superior latency and modest-temperature fast curing, especially EP/CEPM-1-25, which had a long shelf life of 30 days and can gel within 20 min at 150 °C. The limiting oxygen index (LOI) and UL-94 classification of EP/CEPM-1-25 were 33.0% and V-0, indicative of superior flame retardancy. The total smoke production and maximum smoke density of EP/CEPM-1-25 displayed 37.7 and 72.1% reductions relative to those of the control EP sample cured by imidazole, demonstrating improved smoke suppression. EP/CEPM-2-20 also displayed satisfactory fire safety, but slightly inferior to EP/CEPM-1-25. As expected, the CFRP composites based on EP/CEPM-1-25 and EP/CEPM-2-20 showed high LOIs (42.5 and 39.0%) and UL-94 V-0 classification due to the inhibition of P-containing groups in CEPM-1 and CEPM-2 on the wick effect. Therefore, this work proposes a facile and ‘green’ methodology to create high-performance, intrinsically fire-safe single-component EPs and CFRP composites.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Rong Ji,Yuming Dong,Hui Zhao,Chengsi Pan,Guangli Wang,Yongfa Zhu,Junshan Li
Fenton technology has been famous on antibiotics removal, but seriously restricted by the extra addition of H 2 O 2 and low mineralization efficiency. Herein, we develop a novel cobalt-iron oxide/perylene diimide organic supermolecule (CoFeO/PDIsm) Z-scheme heterojunction under photocatalysis-self-Fenton system, in which the holes (h + ) of photocatalyst can mineralize organic pollutants and the photo-generated electrons (e − ) are used to in-situ H 2 O 2 production with high efficiency. The CoFeO/PDIsm exhibits superior in-situ H 2 O 2 production at a rate of 281.7 µmol g −1 h −1 in contaminating solution, correspondingly of total organic carbon (TOC) removal rate of ciprofloxacin (CIP) is 63.7 %, far exceeding current photocatalysts. The high H 2 O 2 production rate and remarkable mineralization ability are ascribed to great charge separation in Z-scheme heterojunction. This work provides a novel Z-scheme heterojunction with photocatalysis-self-Fenton system for environmental-friendly removing the organic containment.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
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IF 4.2
Yan Wang,Shuhang Ren,Yucui Hou,Yuanyuan Zhang,Yaling Li,Wanxiang Zhang,Weize Wu
In this work, a series of novel functionalized deep eutectic solvents (DESs) using 1,1,3,3-tetramethylguanidinium tetrazolate ([TMG][Tetz]) as a hydrogen-bond acceptor (HBA) and azole derivatives as hydrogen-bond donors (HBDs) were synthesized for the capture and catalytic reduction of SO2. [TMG][Tetz]:imidazole (Im) (1:2) DES with favorable stability and reversibility could effectively capture 2000 ppm of SO2. The absorption capacity of [TMG][Tetz]:Im (1:2) DES for 2000 ppm of SO2 was high up to 2.0 mol SO2/mol DES (0.40 g SO2/g DES) at 293.15 K. The results of the UV–vis and FTIR spectra revealed that two kinds of combination existed between SO2 and the DES: charge transfer interaction and chemical interaction. Surprisingly, the absorbed SO2, which was found to form charge transfer complexes with the DES, can be reduced by H2 to elemental sulfur under mild conditions without byproduct and additional catalysts. The yield of elemental sulfur could reach up to 37% at 373.15 K.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Liangri Ying,Fei Liang,Zhen Huang,Jing Ding,Weilong Wang,Shule Liu,Jianfeng Lu
Solar-driven steam generation is widely considered as a promising strategy for desalination. However, before this technology can be practically implemented, certain challenges such as suboptimal steam generation rates and inevitable salt deposition need to be addressed. In this study, we propose a novel bilayer structure aerogel (MS-aerogel), which confines urchin-like MoS 2 /Mo 5 N 6 /C in a biomass gelatin substrate to achieve high-efficiency desalination in high concentration brine solutions. The urchin-like MoS 2 /Mo 5 N 6 /C that hybrid semiconductor MoS 2 , plasmonic Mo 5 N 6 and porous carbon performs superior light-to-heat conversion performance to its individual components. Additionally, under the collaborative action of hydrophilic groups and unique nanostructured surface, the MoS 2 /Mo 5 N 6 /C exhibits a notable reduction in interface evaporation enthalpy from 2405.8 to 1694.6 J g −1 . Taking into consideration the comprehensive thermal management performance, the self-floating MS-aerogel achieves an excellent evaporation rate of 1.89 kg m -2 h −1 under one sun irradiation. Furthermore, the vertically aligned vessels present in the MS-aerogel facilitate salt transportation, effectively preventing crystalline salt accumulation on the evaporator surface. Consequently, even after continuous 12 h desalination in 20 wt% brine, the MS-aerogel maintains an outstanding evaporation rate of 1.54 kg m -2 h −1 , surpassing most reported self-floating evaporators. This research offers a valuable reference for the design of high-efficiency and salt-resistant solar evaporators.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 43
·2303272
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IF 19
Si Yu Zheng,Jiahui Zhou,Mengjie Si,Shuaibing Wang,Fengbo Zhu,Ji Lin,Jimin Fu,Dong Zhang,Jintao Yang
Polyzwitterionic hydrogel is an emerging material for solar-driven water evaporation in saline environment due to its special anti-polyelectrolyte effect, which is a promising approach to co-generation of freshwater and electricity. However, the molecular impact on anti-polyelectrolyte effect remains unclear, let alone to optimize the zwitterionic structure to promote water evaporation efficiency in high-salinity brine. Herein, a molecularly engineered zwitterionic hydrogel is developed and the incorporated phenyl-methylene-imidazole motif greatly enhances the salt binding ability and strengthens anti-polyelectrolyte effect, leading to boosted hydration, improved salt tolerance, ultra-low evaporation enthalpy (almost half of traditional zwitterionic gel), and durable anti-microbial ability in brine. Besides, gradient solar-thermal network is penetrated to optimize water transport channel and heat confinement. The gel exhibits excellent evaporation rate of 3.17 kg m −2 h −1 in seawater, which is 1.6 times of that in water and such high efficiency could be maintained during 8 h continuous desalination, demonstrating outstanding salt tolerance. The high flux of ion stream can generate considerable voltage (321.3 mV) simultaneously. This work will bring new insights to the understanding of anti-polyelectrolyte effect at molecular level and promote materials design for saline water evaporation.
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ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Yong Chang,Gang Liu,Shuang Li,Lin Liu,Qijun Song
Accurate and sensitive determination of recombinant glycoproteins is in great demand for the treatment of anemia-induced chronic kidney disease and the illegal use of doping agents in sports. In this study, an antibody and enzyme-free electrochemical method for the detection of recombinant glycoproteins was proposed via the sequential chemical recognition of hexahistidine (His 6 ) tag and glycan residue on the target protein under the cooperation interaction of nitrilotriacetic acid (NTA)-Ni 2+ complex and boronic acid , respectively. Specifically, NTA-Ni 2+ complex-modified magnetic beads (MBs-NTA-Ni 2+ ) are employed to selectively capture the recombinant glycoprotein through the coordination interaction between His 6 tag and NTA-Ni 2+ complex. Then, boronic acid-modified Cu-based metal-organic frameworks (Cu-MOFs) were recruited by glycans on the glycoprotein via the formation of reversible boronate ester bonds. MOFs with abundant Cu 2+ ions acted as efficient electroactive labels to directly produce amplified electrochemical signals. By using recombinant human erythropoietin as a model analyte, this method showed a wide linear detection range from 0.01 to 50 ng/mL and a low detection limit of 5.3 pg/mL. With the benefits from the simple operation and low cost, the stepwise chemical recognition-based method shows great promise in the determination of recombinant glycoproteins in the fields of biopharmaceutical research, anti-doping analysis and clinical diagnosis.
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Nanomaterials
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2023
·Vol. 13
·期 14
·2069
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IF 5.3
Min Hu,Hu He,Fei Xiao,Chen Liu
The development of nanohybrid with high electrocatalytic activity is of great significance for electrochemical sensing applications. In this work, we develop a novel and facile method to prepare a high-performance flexible nanohybrid paper electrode, based on nitrogen-doped carbon (NC) wrapped Bi nanoparticles (Bi-NPs) assembly derived from Bi-MOF, which are decorated on a flexible and freestanding graphene paper (GP) electrode. The as-obtained Bi-NPs encapsulated by an NC layer are uniform, and the active sites are increased by introducing a nitrogen source while preparing Bi-MOF. Owing to the synergistic effect between the high conductivity of GP electrode and the highly efficient electrocatalytic activity of Bi-NPs, the NC wrapped Bi-NPs (Bi-NPs@NC) modified GP (Bi-NPs@NC/GP) electrode possesses high electrochemically active area, rapid electron-transfer capability, and good electrochemical stability. To demonstrate its outstanding functionality, the Bi-NPs@NC/GP electrode has been integrated into a handheld electrochemical sensor for detecting heavy metal ions. The result shows that Zn2+, Cd2+, and Pb2+can be detected with extremely low detection limits, wide linear range, high sensitivity, as well as good selectivity. Furthermore, it demonstrates outstanding electrochemical sensing performance in the simultaneous detection of Zn2+, Cd2+, and Pb2+. Finally, the proposed electrochemical sensor has achieved excellent repeatability, reproducibility, stability, and reliability in measuring real water samples, which will have great potential in advanced applications in environmental systems.Keywords:Bi nanoparticles;nitrogen-doped carbon;flexible and freestanding graphene paper electrode;electrochemical catalysis and sensing;heavy metal ions detection
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GREEN CHEMISTRY
·
2023
·Vol. 25
·期 15
·5999-6008
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IF 9.8
Yuanyuan Zhang,Wanxiang Zhang,Yan Wang,Shuhang Ren,Yucui Hou,Weize Wu
To reduce the emission of NO from fossil fuel combustion and the energy consumption associated with NH3 production, the development of simple and efficient methods to transform NO into high-value-added NH3 is essential. Here, we report the efficient catalytic hydrogenation of NO to NH3 under mild reaction conditions by the synergistic catalysis of functionalized ionic liquids (FILs) and Pd catalysts. In this system, an FIL [TEPA][Im] acted as both an absorbent and a catalyst. The presence of [TEPA][Im] enhanced the catalytic performance by changing the coordination and electronic environment of Pd on the Pd/C catalyst. First, NO was absorbed by [TEPA][Im]; then, the hydrogenation of absorbed NO to NH3 was performed at a low temperature via the synergistic catalyzation of [TEPA][Im] and Pd/C. The effects of various factors on NO hydrogenation to NH3 were also investigated. Remarkably, Pd/C exhibited outstanding properties in the formation of NH3 with a high yield of 67% in the FIL [TEPA][Im] under the conditions of 100 °C and an H2 pressure of 0.5 MPa. [TEPA][Im] could be reused multiple times and the product NH3 could be recovered by flashing.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Jiabo Cheng,Mengfei Tian,Zarmina Gul,Chunyu Liang,Bin Qiao,Yuan Gao,Chunjian Zhao,Chunying Li
In this study, a functionalized surface active ionic liquid (SAIL) was designed and prepared, which exhibits pH-responsive behavior and high yield for 6 target flavonoids from the leaves of Vitex negundo L.. Firstly, a series of functionalized SAIL [N-C n , N'–CO 2 H-Im]Br (n = 10, 12, 14, 16) were prepared and used for extraction of the target components, [N-C 14 , N'–CO 2 H-Im]Br showed the highest yield. Secondly, optimized extraction conditions obtained by Plackett-Burman design (PBD) and response surface methodology (RSM) were concentration of 45.5 mM, liquid–solid ratio of 11.6 (mL/g), extraction time of 38.5 min, extraction temperature of 40 °C, and ultrasonic power of 400 W. The yield obtained by [N-C 14 , N'–CO 2 H-Im]Br of vitexin, isovitexin, hyperoside, luteolin, quercetin, apigenin is 2.04, 1.81, 1.24, 1.51, 2.47 and 1.21 mg/g, respectively, which is 1.11–1.56 folds higher than non-functionalized SAIL ([C 14 min]Br) and 1.50–5.36 folds higher than traditional solvents. More importantly, the solvent system can realize the in-situ separation of the target compound by adjusting pH. When pH is changed from 6.1 to 4.9, the system is divided into two phases, and the target compounds were separated to the upper phase with a high recovery rate. Finally, molecular simulation was used to reveal the extraction mechanism of functionalized SAIL on target compounds. The results showed that the target flavonoids were compatibilized to the palisade region of micelles, and the weak interaction between the target flavonoids and functionalized SAIL was mainly van der Waals force.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Junjun Chen,Zhenqiang Shi,Xijing Yang,Xiaoyu Zhang,Dongdong Wang,Shengxu Qian,Wenjing Sun,Cunli Wang,Qiongya Li,Zhengjian Wang,Yanling Song,Guangyan Qing
Blood infection can release toxic bacterial lipopolysaccharides (LPSs) into bloodstream, trigger a series of inflammatory reactions, and eventually lead to multiple organ dysfunction, irreversible shock, and even death, which seriously threatens human life and health. Herein, a functional block copolymer with excellent hemocompatibility is proposed to enable broad-spectrum clearance of LPSs from whole blood blindly before pathogen identification, facilitating timely rescue from sepsis. A dipeptide ligand of histidine–histidine (HH) was designed as the LPS binding unit, and poly[(trimethylamine N-oxide)-co-(histidine–histidine)], a functional block copolymer combining the LPS ligand of HH and a zwitterionic antifouling unit of trimethylamine N-oxide (TMAO), was then designed by reversible addition–fragmentation chain transfer (RAFT) polymerization. The functional polymer achieved effective clearance of LPSs from solutions and whole blood in a broad-spectrum manner and had good antifouling and anti-interference properties and hemocompatibility. The proposed functional dihistidine polymer provides a novel strategy for achieving broad-spectrum clearance of LPSs, with potential applications in clinical blood purification.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Shuang Zheng,Shaojuan Zeng,Guilin Li,Bowen Li,Lu Bai,Haiyan Jiang,Qiwei Yang,Xiangping Zhang
Porous ionic liquid (IL) composites, such as impregnated, encapsulated, and porous ILs, are widely used for CO2 capture. However, IL-based adsorbents generally have relatively low IL loading, which cannot fully exploit the unique advantages of ILs. Porous ILs with high IL loading over 90 wt % had high viscosity affecting mass transfer. Therefore, how to simultaneously avoid high viscosity and improve the CO2 absorption rate and IL loadings is of great significant. Herein, a novel fluid IL composite with self-assembled porosity and chemical sites was originally proposed for the CO2 separation. It was prepared by introducing amino-acid IL (AAIL) [N2222][Gly] as the dispersing phase, the mixture of [Emim][Tf2N] (IL1) and [HDBU][Im] (IL2) as the continuous phase, and silica H-20 as the emulsifier, which was named AAIL-H20-IL1/IL2. The results demonstrated that an excellent CO2 capacity of 2.30 mmolCO2/g-sorbent was obtained (313 K/1 bar) with the highest IL loading of 98 wt % among the state-of-the-art value. Meanwhile, micro droplets and porous structures can effectively increase the CO2 absorption rate. The superior CO2 capacity was deduced by the chemisorption of [N2222][Gly] and [HDBU][Im] revealed by in situ FTIR and DFT calculation. In general, this work proposes a pioneer strategy to prepare fluid porous IL composites with ultrahigh IL loading for facilitating CO2 separation.
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GLYCOBIOLOGY
·
2023
·
IF 4.3
Li Chen,Tang Tiancheng,Jiang Jinju,Yao Zhong,Zhu Benwei
Ulva is globally distributed specie and has a high economic value. Ulvan is one of the main active substances in Ulva, which has a variety of biological properties. Ulvan lyase degrades ulvan through a β-elimination mechanism which cleaves the β-glycosidic bond between Rha3S and GlcA or IdoA. The complex monosaccharide composition of ulvan makes it promising for use in food and pharmaceutical applications. This thesis explores a putative ulvan lyase from Alteromonas sp. KUL_42. We expressed and purified the protein, performed a series of characterizations and signal peptide had been removed. The results showed that the protein molecular weight of ULA-2 was 53.97 kDa, and it had the highest catalytic activity at 45 °C and pH 8.0 in Tris–HCl buffer. The Km and Vmax values were 2.24 mg·mL−1 and 2.048 μmol·min−1·mL−1, respectively. The activity of ULA-2 was able to maintain more than 80% at 20 ~ 30 °C. ESI-MS analysis showed that the primary end-products were mainly disaccharides to tetrasaccharides. The study of ULA-2 enriches the ulvan lyase library, promotes the development and high-value utilization of Ulva resources, and facilitates further research applications of ulvan lyase in ulva oligosaccharides.
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危险品化学品经营许可证（带存储）