Nature Communications
·
2023
·Vol. 14
·期 1
·1-14
·
IF 16.6
Li Jingjing,Cui Yihan,Lu Yi-Lin,Zhang Yunfei,Zhang Kaihuang,Gu Chaonan,Wang Kaifang,Liang Yujia,Liu Chun-Sen
The dynamic regulation of supramolecular chirality in non-equilibrium systems can provide valuable insights into molecular self-assembly in living systems. Herein, we demonstrate the use of chemical fuels for regulating self-assembly pathway, which thereby controls the supramolecular chirality of assembly in non-equilibrium systems. Depending on the nature of different fuel acids, the system shows pathway-dependent non-equilibrium self-assembly, resulting in either dynamic self-assembly with transient supramolecular chirality or kinetically trapped self-assembly with inverse supramolecular chirality. More importantly, successive conducting of chemical-fueled process and thermal annealing process allows for the sequential programmability of the supramolecular chirality between four different chiral hydrogels, affording a new example of a multistate supramolecular chiroptical switch that can be recycled multiple times. The current finding sheds new light on the design of future supramolecular chiral materials, offering access to alternative self-assembly pathways and kinetically controlled non-equilibrium states.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2023
·
IF 5.8
Sun Zuyou,Zhou Jiali,Zhang Hui,Liu Zufan,Tao Shiyong,Xu Jing
The widespread used organoarsenicals have drawn attention for decades due to their potential environment risks. In this study, a heterogeneous system of goethite/oxalate irradiated using UVA light ( λ = 365 nm) was applied for the removal of ASA, a kind of organoarsenicals used in animal feeding operations as additives, from the aqueous phase through photodegradation. Results showed that the presence of 5 mM of oxalate significantly enhanced the photodegradation efficiency of ASA in the 0.1 g/L of goethite suspended system from 28 to ~100% within 180 min reaction at pH 5. Acid conditions favored the photoreaction rate, compared with neutral and basic conditions. This reaction process was also influenced by the initial concentration of oxalate and ASA. Furthermore, the mechanism study was conducted by quenching experiments and revealed the important roles of ·OH in the degradation of ASA in the goethite/oxalate/UVA system. By analyzing the reaction products, both inorganic arsenic (As(III) and As(V)) and ammonia were detected during the photodegradation of ASA. These findings help to gain a better understanding of the geochemical behavior of ASA in surface water and can also provide a potential treatment method for the organoarsenicals contaminated water.
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IONICS
·
2023
·Vol. 29
·期 11
·4825-4833
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IF 2.8
Yu Dan,Dong Seng,Liu Qian,Jia Weiyi,Gao Faming,Wang Yatao
The preparation of platinum-free electrocatalysts with ideal oxygen reduction reaction (ORR) activity is of great significance for cost-effective fuel cells. Herein, we synthesize a series of Pd-based (PdFe, PdCo, PdNi, and Pd) nanowires (PdM NWs). Their diameters are about 10 nm. And the lengths are up to even micrometers. The mass activity of the series of Pd-based catalysts followed the descending order: PdNi NWs/C > commercial Pt/C > PdCo NWs/C > PdFe NWs/C > pure Pd NWs/C. The optimal half-wave (E 1/2 ) of PdNi NWs/C (839 mV) is positive shift 138 and 25 mV compared with pure Pd NWs/C (701 mV) and commercial Pt/C (814 mV), respectively. The mass activity (MA) of PdNi NWs/C only dropped 28% after 10,000 potential cycles between 0.6 and 1.1 V versus RHE in acid medium. This work provides a promising and reliable strategy to synthesize high performance Pd-based electrocatalyst, which is promising alternative to expensive Pt-based electrocatalysts for fuel cells. Graphical Abstract TOC: We prepared bimetallic PdNi nanowires, which ORR mass activity higher than pure Pd nanowires and commercial Pt/C in acidic medium.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2023
·
IF 5.8
Zhang Shuwen,Luo Ting,Weng You,Wang Dou,Sun Li,Yu Zheping,Zhao Yao,Liang Senmiao,Ren Haiying,Zheng Xiliang,Jin Yuanxiang,Qi Xingjiang
Carbendazim (CBZ) and prochloraz (PCZ) are broad-spectrum fungicides used in agricultural peat control. Both fungicides leave large amounts of residues in fruits and are toxic to non-target organisms. However, the combined toxicity of the fungicides to non-target organisms is still unknown. Therefore, we characterized the toxic effects of dietary supplementation with CBZ, PCZ, and their combination for 90 days in 6-week-old male Institute of Cancer Research (ICR) mice. CBZ-H (100 mg/kg day), PCZ-H (10 mg/kg day), and their combination treatments increased the relative liver weights and caused liver injury. The serum total cholesterol (TC), triglyceride (TG), glucose (Glu), pyruvate (PYR), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C) levels were reduced, and synergistic toxicity was observed. Hepatic transcriptome revealed that 326 differentially expressed genes (DEGs) of liver were observed in the CBZ treatment group, 149 DEGs in the PCZ treatment group, and 272 DEGs in the combination treatment group. According to KEGG enrichment analysis, the fungicides and their combination affected lipid metabolism, amino acid metabolism, and ferroptosis. In addition, the relative mRNA levels of key genes involved in lipid metabolism were also examined. Compared with individual exposure, combined exposure to CBZ and PCZ caused a more obvious decrease in the expression of some genes related to glycolipid metabolism. Furthermore, the relative mRNA levels of some key genes in the combination treatment group were lower than those in the CBZ and PCZ treated groups. In summary, CBZ, PCZ, and their combination generally caused hepatotoxicity and glycolipid metabolism disorders, which could provide new insights for investigating the combined toxicity of multiple fungicides to animals.
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IRANIAN POLYMER JOURNAL
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2023
·
IF 3.1
Ding Xuanxuan,Wang Minying,Wei Liuyun,Wang Licheng,Yuan Mingqing,Yu Fei,Yang Hua
Poly( N -isopropylacrylamide) (PNIPAm) is a well-known thermosensitive polymer due to its special temperature sensitivity. However, the poor mechanical strength of PNIPAm hydrogels has limited their practical applications. To address this limitation, a novel assembly strategy has been developed to enhance the mechanical properties of PNIPAm hydrogels. The bilayer hydrogel is constructed by combining an upper layer of cross-linked N -isopropylacrylamide (NIPAm) with a lower layer of cross-linked polyacrylamide (PAAm) and polyacrylic acid (PAAc). This innovative hydrogel exhibits bidirectional deformation in response to stimuli, such as temperature, pH, and metal ions. To ensure consistency in the mechanical properties of both layers, sodium alginate, polyvinyl alcohol, and polyethylene glycol were incorporated into the upper layer to form a semi-interpenetrating (semi-IPN) network structure. Notably, the addition of these substances not only improves the mechanical properties and strength of the hydrogel but also accelerates the flow of water molecules within the hydrogel, in addition it enhances its responsiveness to external stimuli. In the end, we obtained three different bilayer hydrogels, among which the bilayer hydrogel with the addition of polyvinyl alcohol (PVA) demonstrated the best mechanical performance. Its maximum tensile stress reached 28.7 kPa and its maximum tensile strain reached 470%, which was about five times higher compared to the original PNIPAm hydrogel. Furthermore, this hydrogel also exhibited a faster response to external stimuli, making it the hydrogel with the best overall performance. Graphical abstract
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COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 301
·期 11
·1285-1294
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IF 2.4
Shi Ran,Yang Qingfeng
Gels formed by bio-macromolecules, free of any initiators, crosslinkers, and other chemical additive agents, are prospective environmentally friendly materials. In this work, organohydrogels prepared from chitosan and polyvinyl alcohol (PVA) without any chemical additive agents are fabricated based on physical crosslink approach and are endowed with anti-freezing and highly stretchable properties. The mechanical properties and phase transition behaviors are investigated. These highly-stretchable organohydrogels display obvious strain and strain rate-dependent tensile properties, where the rupture strain can reach as large as ~ 17. The samples show reversible elasticity at small strains and irreversible plasticity at large strains, accompanied with first a strain softening and then a strain hardening during the stretching process. The cyclic tensile tests present that the samples exhibit residual strain and hysteresis at step loadings, and the rupture behaviors strongly depend on the strain, strain rate, and waiting time. The differential scanning calorimetry (DSC) tests demonstrate that the organohydrogels present only one endothermic melting peak around 60 °C without obvious glass transitions at − 60–60 °C, indicating the stability of the anti-freezing organohydrogels at ultralow temperatures.
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ANALYTICAL SCIENCES
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2023
·
IF 1.6
Zhou Shaomin,Wang Heng,Tang Jun,Wang Heng,Yan Jianbo
A high-performance liquid chromatography-inductively coupled plasma mass spectrometry-based method was developed for the simultaneous determination of four iodine species (i.e. iodate, 3-iodo-tyrosine, 3,5-diiodo-tyrosine, and iodide) and six arsenic species (i.e. arsenobetaine, arsenite, dimethylarsinic acid, arsenocholine, methylarsonic acid, and arsenate) in human urine. The chromatographic separation was performed on a Dionex IonPac As7 anion exchange column. The mobile phase was initiated with 0.5 mmol/L ammonium carbonate solution, followed by 50 mmol/L ammonium carbonate/100 mmol/L ammonium nitrate solution (with 4% methanol). The limits of quantification of the analytes ranged from 0.045 to 2.26 μg/L. At three spiked levels (10.0, 20.0, 50.0 μg/L), the average recoveries (%) ranged from 87.4 to 113.1%, and the relative standard deviations (RSD, %) ranged from 0.4 to 17.2%. The ratio of the sum of six arsenic species to the total arsenic measured by ICPMS ranged from 77.4 to 121.2%, and the ratio of the sum of the four iodine species to the total iodine ranged from 70.7 to 114.7%, indicating a good agreement between these two methods for both arsenic and iodine. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE
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2023
·
IF 4.5
Zhou Jianhua,Yuan Jing,Wang Lin
Superhydrophobic cotton fabric was prepared by coating fluorine-free cationic polyhedral oligomeric siloxane/polydimethylsiloxane-modified polyacrylate emulsion using the pad-bath method. Due to the successful introduction of heptaoctylmethacryloxypropyl polyhedral oligomeric siloxane and monovinyl polydimethylsiloxane, the film with a rough structure and low surface energy was formed on the cotton fabric surface, exhibiting excellent superhydrophobicity with a water contact angle of 161°. Additionally, the finished cotton fabric showed exceptional self-cleaning and anti-foiling abilities. The finished cotton fabric had a separation efficiency of over 97% for oil–water mixtures and maintained a high separation efficiency of over 96% after 20 cycles of separating the n-hexane/water mixture. In addition, the separation of different water-in-oil emulsions was achieved by overlapping three layers of finished cotton fabric. This suggests that the as-prepared superhydrophobic cotton fabric will be a promising material in application for treating oil–water mixtures and water-in-oil emulsions due to the low-cost, simple fabrication method and the superior separation capabilities. Graphical abstract
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JOURNAL OF NANOBIOTECHNOLOGY
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2023
·Vol. 21
·期 1
·1-19
·
IF 10.2
Xu Yanlong,Du Longhai,Han Binxu,Wang Yu,Fei Jichang,Xia Kuo,Zhai Yonghua,Yu Zuochong
Background Osteosarcoma (OS) is the most prevalent primary malignant bone tumor. However, single-agent chemotherapy exhibits limited efficacy against OS and often encounters tumor resistance. Therefore, we designed and constructed an integrated treatment strategy of photothermal therapy (PTT) combined with chemotherapy and used a surface-encapsulated platelet-osteosarcoma hybrid membrane (OPM) that enhances circulation time and enables OS-specific targeting. Results The OPM functions as a shell structure, encapsulating multiple drug-loaded nanocores (BPQDs-DOX) and controlling the release rate of doxorubicin (DOX). Moreover, near-infrared light irradiation accelerates the release of DOX, thereby extending circulation time and enabling photostimulation-responsive release. The OPM encapsulation system improves the stability of BPQDs, enhances their photothermal conversion efficiency, and augments PTT efficacy. In vitro and ex vivo experiments demonstrate that BPQDs-DOX@OPM effectively delivers drugs to tumor sites with prolonged circulation time and specific targeting, resulting in superior anti-tumor activity compared to single-agent chemotherapy. Furthermore, these experiments confirm the favorable biosafety profile of BPQDs-DOX@OPM. Conclusions Compared to single-agent chemotherapy, the combined therapy using BPQDs-DOX@OPM offers prolonged circulation time, targeted drug delivery, enhanced anti-tumor activity, and high biosafety, thereby introducing a novel approach for the clinical treatment of OS.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 8
·1-11
·
IF 5.7
Liao Linhong,Lin Xiao,Wang Kai,Hu Zhiyuan,Wu Fengshou
The preparation of nitrogen and sulfur co-doped carbon dots (N, S-CDs) with highly bright orange-red fluorescence is reported through a facile solvothermal approach with naphthalenetetracarboxylic dianhydride as starting material. The N, S-CDs exhibited superior properties, including intense long-wavelength emission with a narrow full width at half maxima (FWHM) of 33 nm, high fluorescence quantum yield (QY) of 60.5% in aqueous solution, excitation-independent emission behavior, and excellent water dispersibility. In addition, sulfide ions (S 2− ) could selectively recover the fluorescence of N, S-CDs quenched by Sn 2+ . The selective experiment suggested that the N, S-CDs/Sn 2+ complex could be used as a fluorescence-enhancement sensor for sulfide ions (S 2− ), with the linear range of 5–50 μM and the LOD of 0.35 μM. The practicality and feasibility of this sensor for the determination of sulfide ions in tap and lake water were verified with good recoveries. Furthermore, because of their highly bright fluorescence and strong water solubility, the N, S-CDs could be easily fabricated into fluorescent ink and transparent films, demonstrating the promising application in anti-counterfeiting. Therefore, the designed N, S-CDs exhibited the advantages of facile preparation, intense fluorescence, high stability, easy processing, and selective fluorescence change for specific analytes, which showed high potential in fluorescence detection and anti-counterfeiting. Graphical abstract
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Nano Research
·
2023
·
IF 9.9
Wu Mengjun,Song Jiangping,Lei Jiaheng,Tang Haolin
Composite polymer electrolytes (CPEs) have attracted much attention for high energy density solid-state lithium-metal batteries owing to their flexibility, low cost, and easy scale-up. However, the unstable Li/CPE interface is always challengeable for the practical utilization of CPEs. Herein, a polymer interlayer containing K + prepared by ultraviolet (UV)-curing precursor solution is coated on Li surface to stabilize the interface between poly(vinylidene difluoride) (PVDF) composite electrolytes and Li anode. Benefiting from the physical barrier of the interlayer, the continuous decomposition of PVDF is restrained and the intimate contact between electrode and electrolyte is also achieved to reduce the interface impedance. Moreover, the added K + is utilized to further regulate smooth Li deposition. As a consequence, the symmetric Li∣Li cell with coated Li demonstrates steady cycling at 0.4 mAh·cm −2 and a high critical current density of 1 mA·cm −2 . The assembled Li∣LiFePO 4 cell presents outstanding cycling stability (capacity retention of 90% after 400 cycles at 1 C) and good rate performance. The associated pouch cell performs impressive flexibility and safety. This work provides a convenient strategy to achieve stable Li/PVDF interface for high-performance PVDF-based solid state Li metal batteries.
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EUROPEAN JOURNAL OF PLANT PATHOLOGY
·
2023
·
IF 1.8
Xiang Ligang,Yu Zhihe,Wang Hancheng,Cai Liuti,Hsiang Tom,Li Wenhong,Guo Moyan,Li Tong,Sun Meili
Tobacco, as one of the major cash crops in Guizhou province, China, is severely affected by diseases caused by Rhizoctonia solani . Azoxystrobin is a quinone outside inhibitor (QoI) fungicide extensively used to control various crop diseases in China. To evaluate the potential effect of azoxystrobin on the physiology, morphology, and sclerotial formation of Rhizoctonia solani , 104 isolates of R. solani from tobacco collected in Guizhou were evaluated for in vitro sensitivity to azoxystrobin, and scanning electron microscopy was used to observe the effects of azoxystrobin on mycelial morphology. The effects of azoxystrobin on reactive oxygen species (ROS), superoxide dismutase (SOD), catalase (CAT), and succinate dehydrogenase (SDH) in hyphae at three time points (at 5, 10 and 15 days) and on sclerotial differentiation were examined. The effective concentration that caused 50% growth inhibition (EC 50 ) ranged from 0.3 to 552 μg/mL with a geometric mean of 8.4 μg/mL, and the frequency distribution of EC 50 values was unimodal. Scanning electron microscopy revealed that azoxystrobin caused folding, collapse and crumpling of hyphae. Under azoxystrobin stress, sclerotial differentiation was inhibited, and the production of hydrogen peroxide (H 2 O 2 ) and superoxide anion (O 2− ) as well as activities of SOD, CAT and SDH in hyphae increased significantly compared to the untreated control at day 5; while at day 10 or 15, H 2 O 2 production decreased significantly, CAT activity increased significantly, and O 2− , SOD, and SDH concentrations returned to normal levels. In general, the results provide a better understanding of the physiological effects of azoxystrobin on R. solani .
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