MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 4
·1-10
·
IF 5.3
Xue Mengjie,Sang Shengbo,Zhao Dong,Duan Qianqian,Guo Xing
African swine fever virus (ASFV) is a highly infectious and pathogenic DNA virus with a mortality rate of nearly 100%. Here, we developed a flexible biosensor based on a AgNWs/hydrogel/PS(polystyrene)/Fe 3 O 4 composite film for the detection of ASFV P72 protein gene fragments. A large number of carboxyl groups in the hydrogel provide modification sites for capture probes (cp) simplifying the preparation process of the biosensor. Combined with the excellent magnetic properties of Fe 3 O 4 , the excellent electrical conductivity of silver nanowires (AgNWs) and the unique optical properties of two-dimensional photonic crystals (2DPC), the flexible biosensor can convert biological signals into optical signals and electrical signals, and the micro-deformation of the film can be verified by simple optical methods. In order to improve the sensitivity, we introduce Fe 3 O 4 and apply an external magnetic field to amplify the thin film micro-deformation. The concentration of P72 protein gene fragment and the relative change rate of resistance showed a good linear relationship, and the linear equation is y = − 0.00126x − 0.31729; the detection limit (LOD) is as low as 0.208 μM. The composite film was used to detect real serum samples, and the recovery of the composite film fluctuated in the range 91.89 to 103.19%, indicating that the composite film has practical application potential in clinical detection of ASFV. In addition, the biosensor also shows good biocompatibility, stability, and specificity. Graphical
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qi Fu,Xing-Xing Wang,Huan He,Tian-Yang Zhang,Jian Lu,Meng-Yuan Xu,Renjie Pan,Tong-Cheng Cao,Mohamed Gamal El-Din,Bin Xu
Residual carbamazepine (CBZ) in water is difficult to remove through conventional treatment processes, threatening the safety of drinking water. Ultraviolet-based advanced oxidation processes (UV-AOPs) have shown promise in removing refractory organic pollutants, while the low energy and efficiency of traditional mercury lamps hinder their practical applications. In this study, the performance and mechanism of an intensive-energy light source, UV laser, were systematically explored in UV-AOPs (laser/chlorine, laser/persulfate (PS)). It was found that UV laser exhibited a significantly activating ability for chlorine and PS due to its precise wavelength and high pulse energy. When exposed to UV laser (266 nm, 4.2 mW/cm 2 ) combined with 200 μM chlorine and PS, the kinetic rate constants for the degradation of 10 μM CBZ were determined to be 3.160 × 10 -3 and 1.227 × 10 -3 s −1 , respectively. The degradation of CBZ was dominated by hydroxyl radicals (60.98 %) and sulfate radicals (23.15 %) in laser/PS system, while in laser/chlorine system, hydroxyl radicals (54.90 %), chlorine radicals (27.43 %), and chlorine oxide radicals (13.81 %) were primary reactive species. Furthermore, both the laser/chlorine and laser/PS systems demonstrated compatibility with a wide pH range of 5.0–9.0 and high resistance to anionic interference. Moreover, the electrophilic and nucleophilic sites of CBZ and energy barrier of the initial reaction were calculated based on the density functional theory (DFT). Additionally, the degradation pathways of CBZ and the toxicity of transformation products in laser/chlorine and laser/PS processes were proposed and evaluated. These results demonstrated that the UV laser-based processes exhibited promising prospects in eliminating refractory organic pollutants in water treatment.
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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2015
·Vol. 54
·期 3
·368-380
·
IF 3.113
Jingang Li,Yixin Xiang,Sixun Zheng
In this contribution, we reported the synthesis of a hyperbranched block copolymer composed of poly(ε-caprolactone) (PCL) and polystyrene (PS) subchains. Toward this end, we first synthesized an α-alkynyl- and ω,ω′-diazido-terminated PCL- b -(PS) 2 macromonomer via the combination of ring-opening polymerization and atom transfer radical polymerization. By the use of this AB 2 macromonomer, the hyperbranched block copolymer ( h -[PCL- b -(PS) 2 ]) was synthesized via a copper-catalyzed Huisgen 1,3-dipolar cycloaddition (i.e., click reaction) polymerization. The hyperbranched block copolymer was characterized by means of 1 H nuclear magnetic resonance spectroscopy and gel permeation chromatography. Both differential scanning calorimetry and atomic force microscopy showed that the hyperbranched block copolymer was microphase-separated in bulk. While this hyperbranched block copolymer was incorporated into epoxy, the nanostructured thermosets were successfully obtained; the formation of the nanophases in epoxy followed reaction-induced microphase separation mechanism as evidenced by atomic force microscopy, small angle X-ray scattering, and dynamic mechanical thermal analysis. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016 , 54 , 368–380
研究领域:
高分子化学
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材料科学
·
纳米结构功能材料
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聚合物自组装
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热固性树脂改性
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MARINE POLLUTION BULLETIN
·
2025
·
IF 4.9
Shiwei Lv,Chaozheng Lu,Xun Liu,Yao Lu,Yu Chen,Xianhua Liu,Renju Liu,Jingjuan Wang,Xiang Zeng,Quanfu Wang,Zongze Shao
Microplastics (MPs), as an emerging pollutant, are posing a potential threat to ecosystems and human health. It is critical to understand the fate and transport of microplastics in the marine environment to assess the ecological risks. However, the single and combined effects of minerals and extracellular polysaccharides on microplastic aggregation and sedimentation are not fully understood. This study experimentally demonstrated that nanoplastics could form heteroaggregates with montmorillonite or hematite in artificial seawater, accelerating the settling process. In particular, montmorillonite was able to lead to 70.4 % nanoplastics settled after 120 h of incubation at 28 °C, showing stronger adsorption capacity to nanoplastics. The presence of extracellular polymeric substances (EPS) affected the fate of nanoplastics in binary system and ternary systems. Xanthan gum significantly inhibited the aggregation and settlement of nanoplastics probably due to its strong steric hindrance. The nanoplastics remained evenly dispersed and hardly settled in the presence of montmorillonite or hematite. Comparatively, the inhibition activity of sodium alginate on nanoplastic aggregation and settlement was weak. In the respect of water temperature, the self-aggregation, heteroaggregation and sedimentation rates of nanoplastics were less at 4 °C and 10 °C than at 28 °C. These findings provide new perspectives for understanding the fate and transport of nanoplastics in the marine environment, and also provide a theoretical basis for assessing the potential impacts of mciroplastics on deep-sea ecosystems.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xinying Gong,Junyi Ma,Yang He,Yuxin Dong,Yuanjun Tong,Jiayu Mao,Mao Li,Dongmei Wang,Zhengjun Gong
As widely used plastic additives, organophosphate flame retardants (OPFRs) widely coexists with microplastics (MPs) in agricultural soil, where MPs could act as carriers, increasing their environmental risk. However, the combined effects of UV aging and soil dissolved organic matter (DOM) on OPFR adsorption to MPs remains unclear. This study investigated the adsorption kinetics and mechanisms of six OPFRs on polyvinyl chloride (PVC) and polystyrene (PS). Results showed that OPFR adsorption positively correlated with their hydrophobicity (log K ow ), dominated by hydrophobic interaction and partition. Kinetic studies indicated chemisorption governed adsorption, following pseudo-second-order kinetics. Upon UV aging, PVC exhibited increased affinity for polar/medium-polar OPFRs (triethyl phosphate, tributyl phosphate, and tris(2-butoxyethyl) phosphate), attributed to hydrophilic microzones formation, while PS preferentially adsorbed non-polar OPFRs (triphenyl phosphate and tris(2-ethylhexyl) phosphate) due to increased surface roughness and abundant binding sites. For soil DOM, it competitively inhibited OPFRs adsorption via hydrogen bonding on PVC but enhanced the OPFRs adsorption on PS through π-π interactions, acting as a molecular bridge. These findings highlight the critical role of polymer type, UV aging, and DOM in regulating OPFRs fate in soil. This will enhance our understanding of the environmental risks caused by the combined pollution resulting from MPs in soil environment.
研究领域:
环境科学
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土壤化学
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高分子科学
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吸附机制
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生态毒理学
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Frontiers of Chemical Science and Engineering
·
2021
·Vol. 15
·期 5
·1281-1295
·
IF 4.204
Yang Jinian,Xu Yuxuan,Su Chang,Nie Shibin,Li Zhenyu
Poor interfacial adhesion and dispersity severely obstruct the continued development of carbon nanotube (CNT)-reinforced epoxy (EP) for potential applications. Herein, hierarchical CNT nanohybrids using nickel phyllosilicate (Ni-PS) as surface decorations (CNT@Ni-PS) were synthesized, and the nanocomposites derived from varied mass fractions of EP and CNT@Ni-PS were prepared. The morphological structures, tribological performances, curing behaviors and thermal properties of EP/CNT@Ni-PS nanocomposites were carefully investigated. Results show that hierarchical CNT nanohybrids with homogeneous dispersion and well-bonded interfacial adhesion in the matrix are successfully obtained, presenting significantly improved thermal and tribological properties. Moreover, analysis on cure kinetics proves the excellent promotion of CNT@Ni-PS on the non-isothermal curing process, lowering the curing energy barrier steadily.
研究领域:
材料科学
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纳米技术
·
化学工程
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Lili Tian,Miaomiao Sun,Yinglin Liu,Bingyu He,Guangli Dong,Hong Hao
The development of superhydrophobic and highly oleophobic nanocomposites that are highly adhesive to substrates is a major challenge in surface-related technologies. In this study, litchi-like polystyrene (PS) particles were prepared by soap-free emulsion polymerization with styrene (St) as monomer , KH-570 as crosslinking agent and KPS as initiator. Dual-sized litchi-like 1H,1H,2H,2H-perfluorodecyltriethoxy silane-SiO 2 -PS (PFDTES-SiO 2 -PS) particles was sol–gel synthesized using TEOS, PS, and PFDTES. Special superhydrophobic , highly oleophobic, and highly adhesive FDA-SiO 2 -PS (fluoride hdroxyl acrylate-resin-SiO 2 -PS copolymer) coatings were fabricated by embedding fluorosilane-modified litchi-like SiO 2 particles in fluoride hdroxyl acrylate-resin (FHA resin) followed by curing through cross-linking using free radical polymerization . The structure, surface morphology , and properties of the coatings were examined by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM) and contact angle measurements, and chemical analysis. The measured Ra roughness value was 181 nm for FDA-SiO 2 -PS coating. The fluorine-containing groups have a strong tendency to direct themselves to the coating surface , resulting in a superhydrophobic and highly oleophobic coating (water and CH 2 I 2 contact angles of 169.61° and 137.04°, respectively, and a water rolling angle of 4.35°) that is also highly adhesive to substrates (adhesion 5B). Exposing to air for 24 months, the coating possessed long air-stability with contact angles of 159.31° and 135.04° for water and CH 2 I 2 , independently. Furthermore, the FDA-SiO 2 -PS coating endows it with excellent antifouling and self-cleaning abilities, and resistance to E. coli and platelet adhesion; hence, FDA-SiO 2 -PS is a promising coating for use in biomedical and marine antifouling applications.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiangyu Yang,Fucheng Guo,Tao Liu,Qiang He,Jan Vymazal,Yi Chen
Ammonia-oxidizing microorganisms (AOMs, archaea (AOA) and bacteria (AOB)) are primarily responsible for the ammoxidation in constructed wetlands (CWs). However, little is known about evaluating the response of AOA and AOB to engineered nanomaterials (ENMs) and quantifying the shift of their contribution to ammoxidation. Herein, we operated a series of CWs exposing to silver nanoparticles (Ag-NPs), single-walled carbon nanotubes (SWCNTs), and polystyrene nano-sized plastics (PS-NPs) with the wastewater-accumulating concentration of ENMs for 180 days. The results showed that the abundance of AOA amo A gene in situ was far lower than that of AOB, while the abundance ratio of AOA to AOB increased by 15 folds after 180-day experiment. Using DNA stable isotope probing (DNA-SIP) experiment, we found that the active AOB microbiota varied substantially but the AOA was more stable across different groups. Furthermore, the co-occurrence analysis proved that ENMs stress increased the negative coexistence pattern of AOA and AOB; predictive functional profiling showed that the ENMs enhanced the functional advantage of AOA by inhibiting AOB (mainly hydroxylamine oxidation process). Finally, the contribution of AOA increased under exposing to SWCNTs (18.35%), PS-NPs (24.92%), and Ag-NPs (32.14%) compared with control group (0.03%) for 180 days. Despite this, AOB was still the primary executant of ammoxidation in CWs. Overall, in our study, the differences in activities and contributions of AOMs were quantified in CWs, and a significantly negative coexistence relationship between AOA and AOB was revealed when exposed to emerging nanomaterials.
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CHEMOSPHERE
·
2023
·
IF 8.8
Yuqiong Gao,Han Ning,Yanyan Rao,Kexuan Li,Chaole Zeng,Naiyun Gao
The feasibility of the degradation of phenazone (PNZ), a common anti-inflammatory drug used for reducing pain and fever, in water at neutral pH by an electrochemically assisted Fe 3+ -ethylenediamine disuccinate-activated persulfate process (EC/Fe 3+ -EDDS/PS) was investigated. The efficient removal of PNZ at neutral pH condition was mainly attributed to the continuous activation of PS via electrochemically driven regenerated Fe 2+ from a Fe 3+ -EDDS complex at the cathode. The influence of several critical parameters, including current density, Fe 3+ concentration, EDDS to Fe 3+ molar ratio, and PS dosage, on PNZ degradation was evaluated and optimized. Both hydroxyl radicals (•OH) and sulfate radicals (SO 4 ●– ) were considered major reactive species responsible for PNZ degradation. To understand the mechanistic model of action at the molecular level, the thermodynamic and kinetic behaviors of the reactions between PNZ with •OH and SO 4 ●– were theoretically calculated using a density functional theory (DFT) method. The results revealed that radical adduct formation (RAF) is the most favorable pathway for the •OH-driven oxidation of PNZ, while single electron transfer (SET) appears to be the dominant pathway for the reaction of SO 4 ●– with PNZ. In total, thirteen oxidation intermediates were identified, and hydroxylation, pyrazole ring opening, dephenylization, and demethylation were speculated to be the major degradation pathways. Furthermore, predicted toxicity to aquatic organisms indicated that PNZ degradation resulted in products that were less harmful. However, the developmental toxicity of PNZ and its intermediate products should be further investigated in the environment. The findings of this work demonstrate the viability of effectively removing organic contaminants in water at near-neutral pH by using EDDS chelation combined with electrochemistry in a Fe 3+ /persulfate system.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2023
·Vol. 37
·期 4
·e7037
·
IF 3.9
Linbo Li,Baogang Su,Linjun Shao,Shujing Zhou,Jinjing Li,Chenze Qi
A series of Schiff-base functional groups modified MCM-41 materials have been synthesized and used as the supports of palladium species. The chemical structures of MCM-41 functionalized by nine Schiff-base functional groups were characterized by Fourier transform infrared spectroscopy (FT-IR), whereas their grafting densities of functional groups were achieved from the results of thermogravimetric analysis (TGA) and elemental analysis (EA). Small angle powdered X-ray (SAX) patterns demonstrate that the ordered mesoporous structures of MCM-41 were well retained after modification of functional groups and immobilization of Pd 2+ cations. Moreover, the regular mesoporous structures of supports and homogeneous dispersions of Pd 2+ cations were characterized by transmission electron microscopy (TEM). The positron annihilation lifetime spectroscopic (PALS) results revealed that the electronic and steric factors of functional groups could affect the o -Ps annihilation properties of support Pd 2+ cations. Meanwhile, the catalytic activities of these supported Pd 2+ cations chelated by different functional groups were determined by the Heck reaction of iodobenzene with n -butyl acrylate. At last, the catalytic activities of these supported Pd 2+ cations were linearly correlated to their o -Ps annihilation properties. This result demonstrates that the catalytic activities of supported Pd 2+ cations chelated by different functional groups can be readily determined by the o -Ps annihilation, which can be potentially used in the design and preparation of highly active palladium catalysts.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Bolin Lian,Yuanyuan Li,Qilei Yang,Lanlan Xie,Qian Zhang,Yanjie Liu,Xiuhua Zhao,Shujun Li
Phloretin loaded porous starch (Ph-PS) were prepared for its application in food. The effects of Ph-PS in vitro release and its ability against AAPH-induced oxidative stress in vivo zebrafish model were investigated. Ph-PS was prepared by absorption method, the physical and chemical characterization showed that PS decreased the crystallinity of Ph obviously. Ph-PS exhibited higher release amount and faster release rate of Ph compared to free Ph in vitro release study. What's more, the effect of Ph-PS reduced ROS generation and lipid peroxidation was better than that of free Ph in zebrafish model. These findings suggest Ph-PS is a new and simple strategy to improve dissolution rate and antioxidant ability of Ph.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Jiahe Lin,Chongyi Chi,Yuxia Zhang,Jianrong Lin,Qinhui Chen
The interfacial interaction determines the morphology of polymer blends and affects their properties. Herein, snowman-like SiO2@polystyrene (PS) Janus particles (JPs) were synthesized by the phase separation method, and the JPs modified by epoxysilane (EJPs) were used as compatibilizers on PS/PA6 blends. The morphology transformation of PS/PA6 blends and the migration process of EJPs in blends with different processing times were studied. With prolonged processing time, EJPs migrate to the phase interface gradually. PS/PA6 blends with EJPs undergo a similar morphology transformation of sea island, cocontinuous, and sea island to that without EJPs. However, EJPs play refining and fibrotic roles on the dispersed phase, which increases the continuity of PA6. As a result, a continuous PA6 skeleton can be obtained by etching the PS phase from PS/PA6 blends (60/40/1.0) mixed for 5 min. The PA6 skeleton perfused with reduced graphene oxide (rGO) shows electrical conductivity. Moreover, PA6/rGO composites show perfect solar vapor generation properties due to the capillary action of microchannels and the photothermal conversion property of rGO. The water evaporation rate reaches 1.84 kg/m2 h under 1 sun irradiation in the presence of PA6/rGO9 composites, which is 4.7 times more than pure water. The phase separation method is one of the promising industrialization methods for Janus preparation, and PA6/rGO9 composites are expected to be used for solar water evaporators.
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