JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Chaoyi Guo,Jie Jiang,Zhihua Zhu,Jinjin Li,Ling Zhao,Zhenhao Xi
Semi-aromatic nylon MXD6 shows superior mechanical strength and gas barrier properties. To improve its toughness and get sight into its excellent properties, a series of poly( m -xylylene adipamide-co-isophthalamide) (MXD6/I) random copolyamides were synthesized using adipic acid, isophthalic acid (IPA) and m -xylylene diamine as monomers via direct melt polycondensation. The effect of IPA content on the thermal, crystallization, heat resistant, mechanical, and barrier properties of the copolyamides were systematically investigated. The results showed that the increase of IPA content from 0 to 12 mol% resulted in a decrease in the melting point of the copolyamides from 238 to 217°C but the glass transition temperature ( T g ) increased from 88 to 105°C. Correspondingly, the Vicat softening temperature decreased from 199.2 to 172.5°C. The crystallization rate of the copolyamides significantly decreased with the increase of the IPA content. The copolyamides had improved elongation and rupture energy and decent oxygen barrier properties with the introduction of IPA. It is expected that this study would guide design of MXD6 macromolecular chain structure to prepare high-performance MXD6 materials.
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Reaction Kinetics Mechanisms and Catalysis
·
2025
·
IF 1.7
Badr Shahad Ali,Bai Yang,Gu Deng,He Jianing,Badr Rafal Ali
In this study, we explored the photocatalytic degradation of methyl orange (MO) and Rhodamine B (RhB) via 2.0 wt% I–Bi 2 S 3 , ZnIn 2 S 4 , and their composite ZnIn 2 S 4 /2.0 wt% I–Bi 2 S 3 under visible light irradiation. While 2.0 wt% I–Bi 2 S 3 revealed insignificant photocatalytic activity, ZnIn 2 S 4 showed outstanding efficiency, degrading 94.7% of MO in 150 min and 98.9% of RhB in just 35 min. The composite achieved even better performance, 95% MO degradation (150 min) and 99.7% RhB degradation (35 min), demonstrating a synergistic effect between 2.0 wt% I–Bi 2 S 3 and ZnIn 2 S 4 . TEM, SEM, XRD, XPS, UV–Vis DRS, ESR, photoelectrochemistry, and PL tests were performed to characterize the structure, morphology, and separation efficiency of the products. According to kinetic studies, the photocatalytic degradation kinetics of rhodamine B and methyl orange exhibited various patterns. For Rhodamine B (RhB), a nonlinear exponential decay function was applied to obtain the rate constants, yielding k = 0.17186 ± 0.00147 min⁻ 1 for ZnIn 2 S 4 and k = 0.25567 ± 0.00405 min⁻ 1 for the composite with R 2 = 0.99. This outcome indicates that RhB degradation follows first order kinetics closely. While the degradation of methyl orange fulfills R 2 ≈ 0.93, which means it is less consistent with the first order model. The computed rate constants were k = 0.01171 ± 0.00157 min⁻ 1 for ZnIn 2 S 4 and k = 0.01362 ± 0.00184 min⁻ 1 for the composite. MO degradation is characterized by pseudo-first order behavior due to the deviation from linearity of a first order reaction. The boost in photocatalytic degradation was related to the reduction in electron–hole recombination that resulted from the creation of a heterostructure and a doping strategy. This study shows the potential of ZnIn 2 S 4 -based composites as high-performance photocatalysts for environmental remediation, displaying an exceptional solution for effectively eliminating hazardous organic dyes from wastewater.
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ADVANCED MATERIALS
·
2022
·Vol. 35
·期 8
·2209002
·
IF 32.086
Jibin Zhang,Tiankai Zhang,Zhuangzhuang Ma,Fanglong Yuan,Xin Zhou,Heyong Wang,Zhe Liu,Jian Qing,Hongting Chen,Xinjian Li,Shijian Su,Jianing Xie,Zhifeng Shi,Lintao Hou,Chongxin Shan
Pure-red perovskite LEDs (PeLEDs) based on CsPb(Br/I) 3 nanocrystals (NCs) usually suffer from a compromise in emission efficiency and spectral stability on account of the surface halide vacancies-induced nonradiative recombination loss, halide phase segregation, and self-doping effect. Herein, a “halide-equivalent” anion of benzenesulfonate (BS – ) is introduced into CsPb(Br/I) 3 NCs as multifunctional additive to simultaneously address the above challenging issues. Joint experiment-theory characterizations reveal that the BS – can not only passivate the uncoordinated Pb 2+ -related defects at the surface of NCs, but also increase the formation energy of halide vacancies. Moreover, because of the strong electron-withdrawing property of sulfonate group, electrons are expected to transfer from the CsPb(Br/I) 3 NC to BS – for reducing the self-doping effect and altering the n-type behavior of CsPb(Br/I) 3 NCs to near ambipolarity. Eventually, synergistic boost in device performance is achieved for pure-red PeLEDs with CIE coordinates of (0.70, 0.30) and a champion external quantum efficiency of 23.5%, which is one of the best value among the ever-reported red PeLEDs approaching to the Rec. 2020 red primary color. Moreover, the BS – -modified PeLED exhibits negligible wavelength shift under different operating voltages. This strategy paves an efficient way for improving the efficiency and stability of pure-red PeLEDs.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Weiguang Wang,Gequn Shu,Hua Tian,Xiuping Zhu
The treatment of heavy metal ions in wastewater is of great significance for protecting the environment and human health. To improve the power density and removal efficiency of thermally regenerative ammonia electro-deposition battery and expand the concentration range of effective wastewater removal, a new method for removing Cu(II), Co(II), Ni(II) and Ag(I) from wastewater while generating high-power electric energy by using waste heat, called bimetallic thermally regenerative electro-deposition battery (B-TREB), was constructed in this work. For Cu(II)-containing wastewater with a wide concentration range of 0.002–0.3 M, the removal efficiency (RE) of Cu/Zn-TREB could reach more than 90%. With the initial concentration of Cu(II) being increased from 0.0005 to 0.3 M, the peak power density was enhanced from 20 to 546 W m −2 . Besides, for 0.01 M and 0.1 M Co(II) wastewaters, the REs of Co/Zn-TREB were 85% and 90%, respectively. The RE of Ni/Zn-TREB was 88% for 0.01 M Ni(II) wastewater. These results illustrated that B-TREBs could remove many kinds of heavy metal ions in the wastewaters while maintaining a high removal efficiency of ~90% over a wide concentration range, and the produced high-power electricity could provide energy for further treatment or other uses.
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Science China-Materials
·
2020
·Vol. 64
·期 1
·158-168
·
IF 6.098
Fang Cong,Li Ye,Cai Yuting,Zhou Tian-Liang,Tang Xueyuan,Xie Rong-Jun
Cesium lead halide perovskite nanocrystals (NCs) have attracted unprecedented attention owing to their compelling properties for optoelectronic applications. Compared with the classical hot-injection method, the room-temperature (RT) synthetic strategy is more facile and tender, but it is hard to obtain stable CsPbI 3 NCs and it usually uses polar solvents that sometimes reduce the stability and properties of NCs. Here, we reported a simple approach to synthesize highly efficient and stable CsPbI 3 as well as other color-tunable CsPbX 3 NCs with high quantum efficiency at room temperature via an anion exchange at the water-oil interface, in which the as-synthesized pristine CsPbBr 3 NCs in toluene were treated in aqueous solutions of HX (X=Cl, Br, and I) and protonated oleylamine (OAm) acted as a carrier. The synthesized CsPbI 3 NCs had an emission at 680 nm and even showed excellent colloidal stability after being stored for 32 d. The high efficiency and stability of the obtained CsPbX 3 NCs were ascribed to the facts that: (i) the polar reagents were almost removed from the surface of NCs; (ii) the defect-related nonradiative recombination was suppressed efficiently by surface passivation.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Yongjing Deng,Xiaodong Zhao,Ning Ding,Yong Yang,Yongkang Zhu,Mengzhu Wang,Shujuan Liu,Yun Ma,Qiang Zhao
Zero-dimensional (0D) organic–inorganic hybrid metal halides are promising phosphors, yet their wide bandgaps typically require ultraviolet excitation, limiting compatibility with commercial blue light-emitting diode (LED) chips. Here, we present an aggregate-engineering strategy to unlock blue-light excitability in 0D copper(I) iodides by modulating the aggregation architecture of Cu–I motifs within a fixed phosphonium-cation framework. Two homologous compounds, (C26H24OP)2Cu2I4 and (C26H24OP)2Cu4I6, were selectively synthesized through simple stoichiometric regulation. Increasing the nuclearity from a dimer to a tetramer strengthens cuprophilic interactions, narrows the optical bandgap from 2.98 to 2.61 eV, and markedly broadens the excitation window into the blue region. Density functional theory calculations further support the aggregation-induced bandgap narrowing by revealing increased inorganic contributions at the band edges in the tetramer. Notably, the tetramer achieves a high thermal stability and moisture tolerance. Finally, a single-component white LED (WLED) based on the tetramer and a 450 nm chip delivers high-quality white light, and a proof of concept for visible light communication enables high-fidelity audio transmission. This work establishes aggregate engineering as an effective design principle for bridging 0D hybrid halides with practical blue-chip pumping and integrated lighting communication platforms.
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Materials Today Nano
·
2026
·
IF 7.6
Chaohui Zhou,Qi Zheng,Nengqin Jia
I/N co-doped carbonized polymer dot nanozyme was synthesized using DTA, PEI and RhB as precursors. • The DAP CPDs exhibited exceptional peroxidase-like activity, fluorescence property and specific recognition of Hg 2+ . • A portable smartphone-assisted paper-based colorimetric sensing platform for on-site visual detection of Hg 2+ was constructed. • The proposed sensing platform has simplicity, portability, and potential versatility. Mercury ion (Hg 2+ ) pollution poses a serious threat to ecosystems and human health owing to its high toxicity, environmental persistence, and bioaccumulative nature. The development of rapid, cost-effective, on-site visual detection methods for Hg 2+ is paramount but challenging. In this work, we developed a novel iodine/nitrogen co-doped carbonized polymer dots nanozyme (DAP CPDs) via a simple hydrothermal method, which exhibits excellent peroxidase-like activity. Based on the specific inhibitory effect of Hg 2+ on the enzymatic activity of DAP CPDs, a solution-based colorimetric sensor was constructed for the rapid and sensitive visual detection of Hg 2+ , achieving a detection limit of 13.21 nM. Furthermore, A smartphone-assisted, portable paper-based sensing platform was developed by integrating smartphones with paper devices, enabling rapid, cost-efficient, convenient and on-site visual analysis of Hg 2+ in real water samples. This work not only offers insights into the design of high-performance carbonized polymer dot nanozymes, but also presents a practical and portable tool for the on-site monitoring of heavy metal ions in the environment. Schematic diagram of the preparation of DAP CPDs nanozyme and the detection of Hg 2+ by smartphone-based paper device colorimetric platform. Download: Download high-res image (387KB) Download: Download full-size image
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Pharmaceuticals
·
2026
·Vol. 19
·期 4
·640
·
IF 5.7
Zeting Tan,Rongshun Liang,Adam Junka,Haoxuan Sun,Jie Jiang,Haojia Ma,Shisong Fang,Yanfang Sun
Background: Respiratory syncytial virus (RSV) is a leading global pathogen of acute lower respiratory tract infection, posing significant risks to infants, the elderly, and immunocompromised patients.Artemisia argyiLevl.et Vant Extract (AALE) and its active components have a variety of pharmacological effects, but their anti-RSV potential remains unclear. The aim of this study is to investigate the anti-RSV activity of AALE and parthenolide and its underlying mechanisms.Methods: Cell counting kit-8 (CCK-8) assay was used to determine the anti-RSV activities of AALE and parthenolide. Time-of-addition assay and phase of action analysis were used to explore the effect of drugs on the viral replication cycle. Quantitative polymerase chain reaction (qRCR), immunofluorescence (IF) and Western blot (WB) were used to investigate the effects of AALE and parthenolide on RSV-F gene and protein and on RIG-I/TLR-3 pathway related molecules in vitro. In vivo antiviral efficacy was verified by hematoxylin–eosin (HE) staining for lung histopathology, quantitative real-time PCR (qPCR) quantification of RSV-F, RIG-I, TLR-3, IRF3, IL-6, and IFN-β gene expression in lung tissues, and enzyme-linked immunosorbent assay (ELISA) for serum IL-6 and IFN-β levels.Results: AALE exhibited the strongest anti-RSV activity among the extracts (SI = 27.6), while parthenolide was the most potent monomeric compound (SI = 8.19). In vitro, both AALE and parthenolide were effective in the co-treatment and post-treatment models, reducing RSV-F gene and F protein levels in infected cells. Furthermore, they alleviated RSV infection by regulating RIG-I and TLR-3 pathway-related genes and proteins. In vivo, AALE and parthenolide suppressed lung index and RSV proliferation, attenuated lung injury, and down-regulated RIG-I, TLR-3, IRF3, IL-6, and IFN-β expression in the lungs of RSV-infected mice.Conclusions: AALE and its component parthenolide can inhibit the invasion and replication of RSV, making it a potential candidate for the treatment of RSV-related diseases.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Yingying Fang,Guangliang Liu,Ying Wang,Ligang Hu,Yong Liang,Yongguang Yin,Yong Cai,Guibin Jiang
Mercury (Hg) biogeochemical cycling involves redox transformations between Hg(0) and Hg(II), likely via a mercurous Hg(I) intermediate. Despite previously thought metastable, Hg(I) was found to exist stably in natural waters; yet, the redox behavior governing Hg(I) occurrence remains elusively studied. Here, we simulated an environmental Eh gradient (0.219–0.600 V, vs SHE) using noninterfering 1,4-benzoquinone and 1,4-hydroquinone as redox mediators, and demonstrate that Hg(I) redox transformations are strongly Eh-dependent. Hg(I) was stable at 0.302–0.339 V, contrasting significant oxidation (19–98%) at 0.369–0.600 V or reduction (81%) at 0.219–0.255 V. Speciation analysis and thermodynamic calculations confirm that varying proton level alters Hg(II) species abundance (HgHPO4, HgPO4–, and Hg(OH)2), driving this Eh-dependence. Specifically, HgHPO4/HgPO4– exhibits lower reduction potentials (to Hg(I), as Hg2(OH)2) than Hg(OH)2. Consequently, Hg(I) is subject to oxidation to HgHPO4/HgPO4– at 0.369–0.440 V (pH 6.0), while Hg(OH)2 preferentially undergoes stepwise reduction to Hg(I) and Hg(0) at 0.236–0.308 V (pH 7.5). Additionally, externally forced Hg(0) removal processes, e.g., purging used in conventional Hg(0) analysis, significantly affect Hg(I) transformations and enhance Hg reduction under reducing conditions, whereas natural degassing has negligible effects. This work provides valuable parameters for Hg redox thermodynamics and important implications for predicting Hg(I) occurrence in aquatic environments.
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FOOD HYDROCOLLOIDS
·
2026
·
IF 13.8
Xueting Zhang,Chuying Huo,Pengfei Shan,Niping Chen,Quanwei Zhang,Hauyee Fung,Wenting Zhao,Jing Li,Peili Zhu,Shanlong Tang,Ye Yuan,Lin Sun,Junmei Xia,Xuwei Liu,Lifeng Li,Yifa Zhou,Quanbin Han
The functions of polysaccharides are governed by their structures, making sample purity essential for robust structure-activity studies. Polygalacturonic acid (PGA) is widely used as a reference hydrocolloid in bioactivity and materials science research. However, commercial PGA is frequently contaminated with co-purifying polysaccharides, which complicates structure-activity relationship studies. This study identifies a prevalent impurity in commercial PGA and reveals its previously unrecognized, dual role in governing both immunostimulatory activity and hydrogel properties. Using chromatographic methods combined with enzymatic strategies, we isolated two distinct impurities and further purified PGA (pPGA). The impurities were determined to be a free β-1,4-galactan (Galactan) and a rhamnogalacturonan I decorated with β-1,4-galactan side chains (RGI) by structural analyses via MS, NMR, methylation and oligosaccharide profiling. Among them, only the RGI—which naturally carries galactan side chains—triggered a significant immune response in RAW264.7 cells, activating MAPK signaling and increasing levels of NO, IL-6, IL-1β, and TNF-α In contrast, neither the pPGA nor the other impurity, Galactan, showed any immunostimulatory activity. Critically, this bioactive RGI was also essential for material properties. Its removal from commercial PGA markedly weakened the Ca 2+ -crosslinked gels, leading to reductions in both storage (G′) and loss (G″) moduli and resulting in a fragile microstructure. In contrast, the removal of the Galactan did not significantly affect the properties of the hydrogel. Our findings demonstrate that a co-purifying RGI, not PGA itself, is the decisive factor for key biological and physical functionalities attributed to commercial PGA. This finding emphasizes the importance of using structurally defined polysaccharides standards for accurate mechanistic research and controlled biomaterial design.
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Green Energy & Environment
·
2026
·
IF 16.7
Na Wang,Wenting Lu,Fengyan Han,Weiping Xiao,Xiaofei Yang
The electron density of Ce active center is modulated via constructing the Ce–O–Bi configuration in Ce-doped BiOX (X = Cl, Br, I). • Halogen-induced differences in electronegativity and ionic radius effectively modulate Bi–O lattice symmetry and electronic properties. • The optimal 2.5%Ce-BOB catalyst delivers excellent H 2 O 2 selectivity, high production yield and favorable 2e - ORR kinetics. • In-situ electro-generated H 2 O 2 realizes efficient electro-Fenton degradation of organic dye pollutants. The selectivity of two-electron oxygen reduction reaction (2e - ORR) is predominantly determined by the adsorption strength of the key intermediate *OOH on the catalyst active sites, which has often been tuned by 3d transition-metal doping. Herein, we fabricate rare earth Ce doped bismuth oxyhalide (BiOX, X = Cl, Br, I) catalysts. The built in Ce–O–Bi local configuration triggers efficient charge rearrangement and tunes the surface electron density of Ce active centers. Meanwhile, the differences in ionic radius and electronegativity among halogen species can modulate the symmetry of the Bi–O lattice, thereby forming a typical volcano-type correlation between the bond length and 2e - ORR catalytic performance. The synergistic effect of Ce doping and halogen modulation endows the 2.5%Ce-BOB catalyst with optimal 2e - ORR performance. It delivers a H 2 O 2 selectivity of over 90% within the potential range of 0.2-0.6 V and achieves a H 2 O 2 production rate of 2631.4 mmol g -1 h -1 at 0.1 V. Furthermore, this optimized catalyst demonstrates potential application in organic wastewater treatment, where the degradation efficiency of methylene blue (MB) reaches approximately 95% in 40 min and that of rhodamine B (RhB) approaches 99% in 15 min. This work provides new insights into the rational design of electrocatalysts and environmental applications of electrosynthesized H 2 O 2 via the synergistic regulation of rare-earth metal doping and halogen modulation. The synergistic strategy integrating Ce-doping and halogen modulation finely tailors the electronic environment of Ce active centers, endowing the 2.5%Ce-BOB electrocatalyst with favorable H 2 O 2 selectivity, considerable production capacity and effective electro-Fenton degradation of organic dyes. Download: Download high-res image (284KB) Download: Download full-size image
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·Vol. 74
·期 30
·23556-23575
·
IF 6.7
Li Wennian,Huang Yujie,Su Hualing,Nong Jiale,Liang Wenyu,Liu Yonghong,Zhao Longyan,Yuan Qingxia
Pectic
polysaccharides hold therapeutic potential for ulcerative
colitis (UC). This study reports the first isolation of two structurally
distinct pectins from Avicennia marina fruit pericarp: AMPP-2-1 (158 kDa), a rhamnogalacturonan-I (RG-I)-rich
pectin with galactan branches and intricate arabinan side chains rich
in β-Ara f terminals; and AMPP-2-2 (16 kDa),
a low-molecular-weight homogalacturonan (HG)-rich pectin with unsaturated
Gal p A at the nonreducing ends. Both pectins significantly
ameliorated dextran sodium sulfate-induced UC by suppressing inflammation,
restoring intestinal barrier integrity, and modulating gut microbiota
to enrich beneficial bacteria while depleting pathogenic bacteria,
alongside promoting short-chain fatty acid production. Low-molecular-weight
HG showed greater ameliorative effects than RG-I under the present
experimental conditions. These findings establish that pectins may
contribute, at least in part, to the intestinal benefits of A. marina fruits in traditional use, expanding the
structural diversity and biomedical applications of pectic polysaccharides
from underexplored plant resources.
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