ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Junlong Zhang,Jie Wei,Jianting Li,Minchuan Xiahou,Zehao Sun,Ao Cao,Youxin Yuanfeng,Guogang Chen,Yanchun He
The indiscriminate discharge of micropollutants ( e.g. , dyes, antibiotics, industrial additives, etc .) represents a significant risk to human health, and the removal of these substances from water bodies has become a prominent area of research within the field of environmental remediation. A simple hydrothermal-precipitation-photoreduction method was employed to synthesize novel Z-scheme heterojunction photocatalysts of AgBr/CoWO 4 /Ag. The catalysts demonstrated remarkable degradation capabilities with regard to a range of micropollutants present in wastewater. Of the catalysts tested, 5AgBr/CoWO 4 /Ag exhibited the highest degradation rates, reaching 98.58% for Rhodamine B, 86.82% for tetracycline hydrochloride, and 95.60% for 2-mercaptobenzothiazole within 60 min. In particular, the reaction kinetic rate of 5AgBr/CoWO 4 /Ag towards Rhodamine B degradation ( k 2 = 0.26278 L mg −1 ·min −1 ) is 9 times that of AgBr ( k 2 = 0.02953 L mg −1 ·min −1 ) and 113 times that of CoWO 4 ( k 2 = 0.00233 L mg −1 ·min −1 ), which serves to highlight the exceptional photocatalytic activity of the material. The experimental data and subsequent analysis indicated that the enhanced photocatalytic performance can be attributed to two factors: firstly, the electron mediation by Ag nanoparticles leading to improved charge separation efficiency, and secondly, the formation of Z-scheme heterojunctions between AgBr and CoWO 4 . The cyclic tests provided confirmation of the excellent stability and recyclability of the AgBr/CoWO 4 /Ag photocatalysts. It is anticipated that this study will facilitate the development of novel methods for the degradation of refractory micropollutants and provide insights into environmental remediation, thereby contributing to the sustainable development of society.
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POLYMER BULLETIN
·
2024
·
IF 3.1
Liang Zhijie,Peng Jiayu,Xu Yang,Wang Haifeng
A series of carboxyl-modified polyether block silicone (CPES) surfactants were synthesized by the polymerization of 1,1,3,3-tetramethyldihydrodisiloxane, D4, allyl polyoxyethylene and sodium chloroacetate. The structures of the surfactants were characterized by IR and 1 H-NMR. Furthermore, the surface tension, wetting properties, foam properties, emulsifying properties and cleansing properties of the synthesized products were investigated. The results show that these compounds have high surface activity and good foaming stability. The wetting properties are general, but increasing temperature can improve the wetting ability of the product. Besides, CPES surfactants exhibit good emulsifying and cleaning ability.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Yu Yang,Yuanfang Fan,Jinkai Zhang,Shiqiang Liang,Chi Wang,Zhi Geng,Zhongmin Su,Mingxin Huo
In light of the challenges posed by heightened water viscosity and aggravated membrane fouling at low temperatures, this study proposes a novel approach to enhance ultrafiltration (UF) performance. By integrating micro/nano bubbles (MNBs) with UF membrane modification, we aim to mitigate the adverse effects of increased viscosity of feed solution and reduce membrane fouling at low temperatures. Specifically, the utilization of carboxyl-modified poly (aryl ether sulfone) UF membranes enhances water flux and fouling resistance. Our findings indicate that the coupled system maintains comparable flux at both low (5 ± 1 °C) and room (22 ± 1 °C) temperatures, indicating excellent UF permeate performance under low temperatures. Notably, when applied to the cyclic filtration of secondary effluent during winter, the permeate flux of the proposed system surpasses that of the commercial PES UF membrane system by 184.82 %. After three filtration cycles, the permeate flux remains 233.19 % higher than that of the commercial PES UF membrane system, with flux recovery rates ( F RR ) exceeding 90 % in each cycle. These results demonstrate the efficacy of our strategy in addressing the challenges of low-temperature UF, achieving efficient separation processes. Our coupled system represents a promising advancement, offering novel insights and practical solutions for membrane-based water treatment in low-temperature environments.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Kailiang Zhang,Chen Cai,Haizhen Sun,Yupan Wu,Zhijie Xie
Controllable fluid concentration regulation is significant for numerous applications, including cell culture, material synthesis and protein crystallization. However, current methodologies are confined by intricate fluidic networks, specialized chip fabrication and manipulation equipment, as well as limited and inflexible manipulation capabilities. In this study, we introduce a novel approach for efficient droplet concentration modulation utilizing AC electrothermal (ACET) flow. The designed microfluidic device comprises two functional units: a fluid mixing zone and a droplet generation region. The fluid mixing zone features an electrode array positioned at the microchannel's bottom, configured in an asymmetrical layout to induce robust ACET flow. When two aqueous solutions with different concentrations are introduced into the device through separate inlets, they undergo mixing to achieve the desired concentrations in the main channel due to the stirring of ACET flow first and encapsulated into dispersed droplets by the shear force of the oil phase afterwards. The droplet concentrations can be dynamically adjusted by modulating the driving voltage, signal frequency and inlet flow rates. The versatility of this technique is validated through the successful fabrication of phenolphthalein crystal particles under different fluid concentrations. Therefore, this research holds significant promise for a wide range of applications requiring droplet concentration manipulation.
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Journal of Oleo Science
·
2025
·
IF 1.8
Lin Gu,Yuan Gao,Wenxin Li,Jianing Liu,Danyang Wang,Yongjie Chi,Jing Zhang,Qingyan Gai,Habiba Nazir,Qingye Jia,Huimei Wang,Lianyan Wang
Ozonized sunflower oil has been found to have a valuable antimicrobial activity against bacteria, viruses, and fungi. However, delayed cutaneous wound healing, severe adverse skin reactions such as pain, burns, irritation, and unsatisfactory storage stability have limited its clinical use as it is known that the performance of ozonized sunflower oil is reflected by core indicators such as iodine value (IV), peroxide value (PV), and acid value (AV). Aiming to improve the above characteristics, ozone oxidation conditions such as the oil water content of raw materials, stirring speed, and ozonized time were successfully optimized, and the optimized conditions were 5%, 300 rpm, and 6 h, respectively. Additionally, the UHPLC-Q-Exactive Orbitrap MS was used to identify the compounds of sunflower oil and ozonation sunflower oil, and 10 fatty acids were successfully identified. The results clearly indicated that the ozonized sunflower oil prepared under optimized ozonation conditions achieved a high degree of ozonation (II) and a satisfactory PV/AV ratio. These optimized conditions further proved to be valuable in improving not only the storage stability of ozonized sunflower oil for up to six months but also in ensuring its remarkable antimicrobial effects on Staphylococcus aureus and Candida albicans, with a PV of 165.75 mmol/kg achieving a 100% antibacterial efficacy.
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Advanced Membranes
·
2025
·
IF 9.5
Zhiqiang Wu,Yu Xu,Junbin Liao,Qishun Zhang,Wenlong Ding,Yanqing Xu,Huimin Ruan,Jiangnan Shen,Congjie Gao
A siloxane cross-linked, amino-long-chain modified poly(aryl ether sulfone) (PPH-Im SiO -NH 2 -X) anion exchange membrane (AEM) has been synthesized. The results demonstrated that the perm-selectivity ( ) of the PPH-Im SiO -NH 2 -X AEMs gradually increased with the increasing content of the amino chains and reached its maximum value of 30.17 in the PPH-Im SiO -NH 2 -50 AEM. The mechanism underlying the enhanced selectivity was systematically analyzed by combining SAXS characterization with physico-chemical property evaluations. Specifically: (i) The siloxane cross-linked network effectively suppressed membrane swelling (water uptake ≤ 8.81%, swelling ratio ≤ 3.03%), thereby ensuring the stability of the ion transport channels; (ii) The amino long-chain interacted physically with the cross-linked network to form entanglements, reducing the size of ion clusters to 0.332 nm and further narrowing the ion channels, which selectively inhibited the migration of SO 4 2− via a size-sieving effect. This study not only broadened the application scope of siloxane cross-linking agents in the field of ion exchange membranes (IEMs) but also provided a novel material design strategy for developing anion exchange membranes with high selectivity and excellent stability.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Chen Shao,Runhe Li,Yan Liu,Wen Qin,Yujie Li,Daohong Zhang,Shuyang Sun
A cationic magnetic nano-photosensitizer (CMNP) was developed by co-condensing silanized chlorin e6 and quaternary ammonium groups onto silica-coated iron oxide nanoparticles. CMNP exhibited excellent colloidal stability, strong photodynamic activity, and enhanced bacterial affinity due to its high surface charge. Under 660 nm irradiation (30 J/cm 2 ), CMNP achieved 3.87–6.00 log reductions of Escherichia coli , Salmonella Typhimurium , Staphylococcus aureus , and Listeria monocytogenes in purified drinking water. In clarified apple juice, despite reduced bacterial binding, 2.14–5.17 log reductions were still obtained at 90 J/cm 2 . CMNP enabled complete magnetic removal, leaving no detectable residue and causing minimal impact on juice quality. Cytotoxicity assays confirmed that treated juice exhibited no additional toxicity to HepG2 and b.End3 cells. Moreover, CMNP maintained stable bactericidal efficacy over five reuse cycles. This study demonstrates a residue-free, recyclable photodynamic inactivation strategy and represents the first application of cationic nano-photosensitizers for microbial control in a liquid food system.
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Foods
·
2025
·Vol. 14
·期 14
·2441
·
IF 5.1
Erlin Zhai,Jing Zhang,Jiancai Zhu,Rujuan Zhou,Yunwei Niu,Zuobing Xiao
Lard imparts unique organoleptic properties that underpin its essential role in Chinese gastronomy; however, the specific lipid precursors contributing to its aroma remain unclear. This study explores the flavor formation mechanism of lard by comparing its texture and aroma at two preparation temperatures, 130 °C and 100 °C. We identified a total of 256 and 253 lipids at these temperatures, respectively, with triacylglycerols (TGs) and diacylglycerols (DGs) being the predominant lipid species. An HS-GC-IMS analysis detected 67 volatile compounds, predominantly aldehydes, acids, and alcohols. A subsequent Orthogonal Partial Least Squares-Discriminant Analysis (OPLS-DA) identified 49 discriminatory lipids and 20 differential volatiles. A correlation analysis showed a positive relationship between aldehydes and unsaturated triglycerides in lard, with TG (16:1-16:1-18:0), TG (17:2-18:1-18:1), TG (16:1-17:1-18:1), and TG (18:1-18:1-20:1) identified as characteristic markers at both temperatures. Furthermore, there was a positive correlation between ketones and alcohols and phospholipids and sphingolipids containing unsaturated fatty acid chains. TGs and glycerophospholipids (GPs), rich in polyunsaturated fatty acids, are likely key precursors driving the formation of distinct flavors during lard processing. This study elucidates the mechanistic interactions between lipids and volatile organic compounds, providing a framework for optimizing lard processing protocols and flavor modulation.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yanhong Wang,Wenze Guo,Jun Yue,Hero Jan Heeres,Ling Zhao,Zhenhao Xi
The esterification of 2,5-furandicarboxylic acid (FDCA) and ethylene glycol (EG) constitutes a critical initial step in the synthesis of poly(ethylene-2,5-furandicarboxylate) (PEF), a promising biobased alternative to the conventional petroleum-based polyethylene terephthalate with superior physiochemical properties. This work presented experimental and kinetic modeling studies on FDCA-EG esterification for the synthesis of PEF using tetrabutyl titanate as a catalyst at 190–220 °C. A reaction network was proposed, incorporating the reversible esterification, transesterification, and, particularly, the decarboxylation of terminal carboxyl groups to elucidate the coloration phenomenon in PEF synthesis. A comprehensive kinetic model, integrating the reaction kinetics and water removal, was developed using the terminal group method from the homogeneous-stage experiments and validated by the reactions in the heterogeneous stage. The model enables accurate prediction of the time to reach a clear point, the esterification rate, and the concentrations and selectivities of key terminal groups and components under varying conditions. Model implication reveals temperature and water removal efficiency (kLa) as dominant kinetic drivers, while equilibrium water concentration governs the minimum level of terminal carboxyl groups and equilibrium esterification rates, which remain unaffected by temperature or kLa. Although all three parameters show negligible effects on ester product selectivity, byproduct selectivity becomes sensitive to these parameters as the system approaches equilibrium, emphasizing the need to avoid equilibrium extremes for decarboxylation mitigation. These insights provide a kinetic framework to balance reaction regulation and byproduct mitigation, enabling optimized FDCA-EG esterification and efficient PEF synthesis through appropriate process intensification.
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JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
·
2025
·
IF 3.6
Wang Ya-jun,Zhang Jian-bao,Liu Shao-hua,Li Jun-guo,Zeng Ya-nan,Wang Yi-tong,Zhang Xi,Liu Bao,Zhang Xiao-pei,Peng Li-jie,Zhang Ya-jing
A slurry-phase carbonation technique was utilized, employing argon oxygen decarburization slag (AOD slag) as a source of calcium and MgCl 2 as a regulator for the crystal morphology of acicular aragonite. Subsequently, the carbonated AOD slag, enriched with acicular aragonite, was employed in fabricating composite cementitious materials, followed by an analysis of their evolution in hydration heat, hydration products, and microscopic morphology. Additionally, it delved into the mechanism through which acicular aragonite enhances the stength of composite cementitious materials. Moreover, advanced simulation software for engineering and sciences (ABAQUS) was utilized to simulate the compressive performance of composite mortar with varying dosages of acicular aragonite. The findings demonstrate that the carbonated AOD slag, containing 83.4% acicular aragonite (with an average aspect ratio of 21.31), exhibited commendable compatibility with cement. Moderate integration of carbonated AOD slag facilitated the formation of calcium sulfoaluminate hydrate (AFt) phases. The acicular aragonite within the cementitious matrix showcased remarkable filling effects. As the dosage of carbonated AOD slag increased, flexural and compressive strengths of cement mortar initially rose before declining. Upon reaching a 6% cement inclusion of carbonated AOD slag, the various constituents of the cementitious material displayed optimal synergy. The numerical simulation results confirmed the experimental findings, demonstrating a favorable increase in compressive strength and flexural strength with the addition of acicular aragonite. The acicular aragonite strengthened the matrix by serving bridging and pull-out functions.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Chen Li,Yuan Liu,Yiqing Guo,Wang Guo,Xinai Zhang,Wen Zhang,Xiaobo Zou,Zongbao Sun
Although electrochemical sensors offer a convenient approach for cyanide detection, they often require multiple components or complex instrumentation. To address this limitation, we designed a covalent organic framework-encapsulated thionine-modified silver‑gold composite (Ag-Au@COF-Thi) sensor that integrates sensitivity and simplicity into a single platform. Ag Au nanoparticles are embedded within a COF matrix, with Thi stably adsorbed on the Au surface to provide an internal reference. The sensor is integrated into a miniaturized electrochemical platform, enabling point-of-care cyanide detection via dual-signal readout: target (I CN − ) and reference (I Thi ). After each cycle, the sensor breaks down the silver-cyanide complex and restores the electrode surface, ensuring repeatable performance. Under optimal conditions, the I CN − / I Thi signal ratio correlates linearly with cyanide concentration from 1 ng/mL to 0.5 μg/mL, achieving a detection limit of 0.82 ng/mL. This sensor effectively quantifies cyanide in Baijiu and fermented grains, offering a promising method for food contamination monitoring.
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Journal of Physical Chemistry Letters
·
2025
·
IF 4.6
Xiaohui Xu,Yu Cheng,Xinnan Xu,Weidong Tang,SiSi Liu,Chunlin Mu,Yinshi Huang,Baocong Guo,Chenglin Yan,Tao Qian
Ammonia is a hydrogen-dense, carbon-neutral energy carrier, but sluggish oxidation kinetics and catalyst toxicity limit its large-scale use in low-temperature alkaline direct ammonia fuel cells (DAFCs). Inspired by the “Grotthuss hopping” theory, we designed a hydroxyl group-modified membrane electrode catalyst system through the modification of interface key groups. This system can interact with adsorbed OH– (hereafter, OH–ad), thus being similar to a “relay” that allows OH–ad to jump from one active site to another and then react with ammonia intermediates, injecting more impetus into the kinetic process of the orderly release of OH–ad. The results of molecular dynamics (MD) simulations and operando Fourier transform infrared spectroscopy (operando-FTIR) further demonstrated and confirmed that this process follows the Gerischer–Mauerer (G–M) mechanism. Consequently, the mass activity of the best membrane electrode catalyst in this series, PtNiNC@OH0.05 (373 A g–1Pt), has been significantly enhanced in alkaline media, which is 3.2 times higher than that of the commercial 20% Pt/C (116 A g–1Pt) catalyst. Even more surprisingly, the DAFC of the membrane electrode catalyst as an anode achieves a peak power density of 17.4 mW cm–2 at 60 °C, which is 9.89-fold higher than that of 20% Pt/C (1.76 mW cm–2). The interface modification method based on the “relay” jumps proposed by us provides a way to fabricate DAFC membrane electrode catalysts.
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