INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jinyue Sun,Hui-Ling Shen,Jia-Neng Pan,Ting Yu,Wen-Wen Zhou
The ferrous sulfate (FeSO 4 )-based mechanism causing ferroptosis-like death in Pseudomonas aeruginosa was investigated. FeSO 4 triggered ferroptosis in P. aeruginosa planktonic cells, decreased the ratio of glutathione to oxidized glutathione, and resulted in the increase of reactive oxygen species and lipid peroxidation, damaging the integrity of the cell membrane. In addition, FeSO 4 prevented P. aeruginosa from forming biofilms on the surface of stainless steel, glass, and high-density polyethylene. Transcriptome analyses indicated that there were 412 up-regulated genes and 782 down-regulated genes following FeSO 4 treatment. FeSO 4 increased the cross-linking density of a carboxymethyl chitosan (CMCS) agar-based film, reducing its water solubility, swelling degree, water vapor permeability, and oxygen permeability. Finally, FeSO 4 @CMCS agar-based film showed potential antibacterial ability against the growth of P. aeruginosa in grapes, purple kale, and cherry tomatoes during storage.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Guoping Yu,Binglin Tang,Qingcheng Luo,Huanyu Chen,Zhe Yin,Zhichao Zhang,Ziwen Wang,Bo Lv,Shaoyun Shan
Powdered titanium dioxide (TiO 2 ) photocatalysts are widely used in the photodecomposition of water for H 2 production due to their low cost, and high stabilizing activity under UV light . However, it has encountered great challenges in photocatalytic reactions, such as easy aggregation and being difficult to recycle. To solve these problems, we proposed a hydrogel (HY) composite material. The material Au@TiO 2 /HY was created by mixing HY with TiO 2 supported co-catalyst Au nanoparticles (NPs). The results show that Au@TiO 2 /HY is difficult to spread owing to its block shape in the photocatalytic reaction, the H 2 evolution rate is only 4.59 mmol/g/h. Therefore, on account of the fact that hydrogel microspheres (HYM) can enhance performance, Au@TiO 2 /HYM was self-assembled by mechanical methods on the synthesis scheme of Au@TiO 2 /HY, which improves the Ultraviolet and visible (UV–vis) light absorption range. The H 2 evolution rate of Au@TiO 2 /HYM is 17.08 mmol/g/h, which is ∼3.7-fold higher than that of Au@TiO 2 /HY (4.59 mmol/g/h), according to the data. The mechanism studies demonstrate that the HYM improve the UV–vis light absorption range and promote the separation of photogenerated electron-hole pairs in Au@TiO 2 /HYM during photocatalysis compared to typical bulk HY, thus improving the photocatalytic H 2 evolution activity. The results provide a reference for the preparation of recyclable HYM for photocatalytic H 2 production.
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Journal of Materials Chemistry B
·
2024
·
IF 6.1
Ming You,Shuming Zhang,Binjie Chen,Fangzhi Mou,Jianguo Guan
Micro/nanorobots (MNRs) hold great promise for various applications due to their capability to execute complex tasks in hard-to-reach micro/nano cavities. However, the developed magnetic MNRs, as marionettes of external magnetic fields, lack built-in intelligence for self-targeting, while chemotactic MNRs suffer from limited self-targeting range. Here, we demonstrate magnetic–chemotactic ZnO/Fe–Ag Janus microrobots (JMRs) capable of rapid, remote self-targeting for bacterial elimination. The JMRs utilize the magnetic Fe engine for coarse navigation from a distance, allowing for external control to swiftly guide them to the vicinity of a hidden/uncharted target that establishes a local chemical gradient ([CO2] or [H+] gradient). Once in proximity, the inherent chemotaxis of the JMRs takes over, the chemotactic engine enables them to autonomously accumulate at the target site along the chemical gradient in high precision. Upon reaching the target, the ZnO/Fe–Ag JMRs can release Zn2+ and Ag+ to eliminate bacteria residing there. The proposed strategy of integrating on-board chemotaxis with external magnetic field-driven propulsion paves the way for efficient precise therapies using MNRs, especially in targeted drug/energy delivery involving remote hidden or uncharted targets.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Shuang Hao,Lingshuang Liu,Jun Xiao,Jianxiao Wang,Yongkai Xu,Yunxia Hu
Surfactants assisted interfacial polymerization (IP) has been demonstrated as an effective method to finely tailor the structure and performance of polyamide (PA) reverse osmosis (RO) membranes. However, little is done to illustrate how molecular structure of cationic surfactants affects IP and the amounts of surfactants incorporated into PA. In this study, three types of quaternary ammonium cationic surfactants were employed to assist the IP process and to fabricate RO membranes. Results show that these three cationic surfactants can not only significantly accelerate m -phenylenediamine (MPD) diffusion from aqueous phase into oil phase and promote the PA crosslinking, but also can be incorporated into PA to affect the surface properties (hydrophilicity, charge properties). Benzyl dimethyl phenyl ammonium chloride (BDMPAC) having two benzene rings had been found to be incorporated into PA with the highest amount because of its similar benzene structure as PA. Moreover, benzalkonium chloride (BAC) with the longest aliphatic tail induced a pronounced Marangoni convection during IP, resulting in an enlarged surface area of PA with large leaves and abundant internal/backside voids, and thus the highest water permeance. This study demonstrates a facile and simple way of using cationic surfactants to engineer the high-performance polyamide RO membrane.
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Journal of Environmental Sciences
·
2024
·
IF 5.9
Yunjin Yao,Zhongming Tao,Hongwei Hu,Lijie Zhang,Ziwei Ma,Yaoyao Wang,Shiyang Lin,Shaobin Wang
Catalytic oxidation of organic pollutants is a well-known and effective technique for pollutant abatement. Unfortunately, this method is significantly hindered in practical applications by the low efficiency and difficult recovery of the catalysts in a powdery form. Herein, a three-dimensional (3D) framework of Fe-incorporated Ni 3 S 2 nanosheets in-situ grown on Ni foam (Fe-Ni 3 S 2 @NF) was fabricated by a facile two-step hydrothermal process and applied to trigger peroxymonosulfate (PMS) oxidation of organic compounds in water. A homogeneous growth environment enabled the uniform and scalable growth of Fe-Ni 3 S 2 nanosheets on the Ni foam. Fe-Ni 3 S 2 @NF possessed outstanding activity and durability in activating PMS, as it effectively facilitated electron transfer from organic pollutants to PMS. Fe-Ni 3 S 2 @NF initially supplied electrons to PMS, causing the catalyst to undergo oxidation, and subsequently accepted electrons from organic compounds, returning to its initial state. The introduction of Fe into the Ni 3 S 2 lattice enhanced electrical conductivity, promoting mediated electron transfer between PMS and organic compounds. The 3D conductive Ni foam provided an ideal platform for the nucleation and growth of Fe-Ni 3 S 2 , accelerating pollutant abatement due to its porous structure and high conductivity. Furthermore, its monolithic nature simplified the catalyst recycling process. A continuous flow packed-bed reactor by encapsulating Fe-Ni 3 S 2 @NF catalyst achieved complete pollutant abatement with continuous operation for 240 h, highlighting its immense potential for practical environmental remediation. This study presents a facile synthesis method for creating a novel type of monolithic catalyst with high activity and durability for decontamination through Fenton-like processes.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Tianqi Jiang,Jialiang Zhou,Ruixue Wang,Hengxue Xiang,Jinqi Wang,Zexu Hu,Senlong Yu,Gongxun Zhai,Chao Jia,Meifang Zhu
Achieving rapid and long-term antibacterial effects in medical protective textiles is a significant challenge. In this work, Cu 2 O-GO nanocomposites are prepared by in-situ growth of small-sized cuprous oxide (Cu 2 O) nanoparticles on the surface of graphene oxide (GO). At a concentration of 20 µg/mL, Cu 2 O-GO achieves 99 % antibacterial rate against E. coli and B. subtilis within 10 min, with complete eradication in 30 min. After 6 months of air exposure, the Cu 2 O-GO exhibits an antibacterial efficacy of 84.7 % against B. subtilis and 96.7 % against E. coli , significantly higher than that of Cu 2 O alone. PA6/Cu 2 O-GO fibers produced via melt spinning show over 99.99 % antibacterial efficiency at just 0.6 % addition and retain effectiveness even after 50 washes. The antibacterial mechanism of Cu 2 O-GO involves the release of copper ions and generation of reactive oxygen species, which disrupt bacterial cell membranes, leading to protein and DNA damage, ultimately causing cell death. This research offers valuable insights for the development of long-term antibacterial materials.
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Small
·
2024
·Vol. 20
·期 37
·2402700
·
IF 13
Xueliang Ma,Wenxu Wang,Xiaojing Cui,Yunsheng Li,Kun Yang,Zhiquan Huang,Hulin Zhang
Identity recognition as the first barrier of intelligent security plays a vital role, which is facing new challenges that are unable to meet the need of intelligent era due to low accuracy, complex configuration and dependence on power supply. Here, a finger temperature-driven intelligent identity recognition strategy is presented based on a thermogalvanic hydrogel (TGH) by actively discerning biometric characteristics of fingers. The TGH is a dual network PVA/Agar hydrogel in an H 2 O/glycerol binary solvent with [Fe(CN) 6 ] 3−/4− as a redox couple. Using a concave-arranged TGH array, the characteristics of users can be distinguished adequately even under an open environment by extracting self-existent intrinsic temperature features from five typical sites of fingers. Combined with machine learning, the TGH array can recognize different users with a high average accuracy of 97.6%. This self-powered identity recognition strategy is further applied to a smart lock, attaining a more reliable security protection from biometric characteristics than bare passwords. This work provides a promising solution for achieving better identity recognition, which has great advantages in intelligent security and human-machine interaction toward future Internet of everything.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chenxi Gao,Xiaoqing Qu,Lei Fu,Jia Chen,Yuefeng Chu,Hongdeng Qiu
Bacterial resistance to antibiotics has rendered bacterial infections an escalating threat to public health, prompting numerous researchers to strive towards the development of novel antimicrobial agents. Designable ionic liquids (ILs) have gained increasing prominence in the field of antibacterials. However, certain ILs exhibit suboptimal antimicrobial activity. In this study, we synthesized ionic liquid-derived carbon dots (IL-CDs: VOIMBr-CD) through vinyl and epoxy group reactions, resulting in enhanced antimicrobial efficacy. The VOIMBr-CD retains the antibacterial structure characteristic of ILs, including a positively charged imidazolium group and long alkyl chain. Moreover, VOIMBr-CD demonstrates selective antibacterial action against Staphylococcus aureus ( S. aureus ) while effectively inhibiting S. aureus biofilm growth. Notably, the antibacterial efficacy of VOIMBr-CD against methicillin-resistant Staphylococcus aureus ( MRSA ), surpasses vancomycin (Van). We conducted comprehensive investigations into the selective antibacterial mechanism of VOIMBr-CD which primarily involves electrostatic interactions, hydrophobic interactions, as well as generation of reactive oxygen species (ROS) within bacteria cells. In vivo experiments demonstrated that VOIMBr-CD significantly alleviate inflammation, facilitated collagen deposition and angiogenesis, and effectively expedited wound healing in MRSA -infected mice models; thus, highlighting their potential as therapeutic candidates for diseases resembling MRSA infection-like conditions. Importantly, this work presents a novel approach utilizing IL-based materials for developing effective antibacterials thereby offering new insights into the application prospects of IL-derived materials.
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MOLECULES
·
2024
·Vol. 29
·期 10
·2276
·
IF 4.2
Qun Xue,Zhihui Chen,Wenjing Xie,Shuke Zhang,Jie Jiang,Guoxin Sun
Bioelectrochemical systems (BESs) are an innovative technology for the efficient degradation of antibiotics.Shewanella oneidensis(S. oneidensis) MR-1 plays a pivotal role in degrading sulfamethoxazole (SMX) in BESs. Our study investigated the effect of BES conditions on SMX degradation, focusing on microbial activity. The results revealed that BESs operating with a 0.05 M electrolyte concentration and 2 mA/cm2current density outperformed electrolysis cells (ECs). Additionally, higher electrolyte concentrations and elevated current density reduced SMX degradation efficiency. The presence of nutrients had minimal effect on the growth ofS. oneidensisMR-1 in BESs; it indicates thatS. oneidensisMR-1 can degrade SMX without nutrients in a short period of time. We also highlighted the significance of mass transfer between the cathode and anode. Limiting mass transfer at a 10 cm electrode distance enhancedS. oneidensisMR-1 activity and BES performance. In summary, this study reveals the complex interaction of factors affecting the efficiency of BES degradation of antibiotics and provides support for environmental pollution control.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xiaoyu Fu,Jingfeng Gao,Qian Wang,Hao Chen,Ying Liu,Liqin Zeng,Yukun Yuan,Hongxin Xu
The existence of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) has been a global public environment and health issue. Due to the different cell structures, gram-positive/negative ARB exhibit various inactivation mechanisms in water disinfection. In this study, a gram-negative ARB Escherichia coli DH5α ( E. coli DH5α) was used as a horizontal gene transfer (HGT) donor, while a gram-positive ARB Bacillus as a recipient. To develop an efficient and engineering applicable method in water disinfection, ARB and ARGs removal efficiency of Fe(VI) coupled peroxydisulfate (PDS) or peroxymonosulfate (PMS) was compared, wherein hydroxylamine (HA) was added as a reducing agent. The results indicated that Fe(VI)/PMS/HA showed higher disinfection efficiency than Fe(VI)/PDS/HA. When the concentration of each Fe(VI), PMS, HA was 0.48 mM, 5.15 log E. coli DH5α and 3.57 log Bacillus lost cultivability, while the proportion of recovered cells was 0.0017 % and 0.0566 %, respectively, and HGT was blocked. Intracellular tetA was reduced by 2.49 log. Fe(IV) and/or Fe(V) were proved to be the decisive reactive species. Due to the superiority of low cost as well as high efficiency and practicality, Fe(VI)/PMS/HA has significant application potential in ARB, ARGs removal and HGT inhibition, offering a new insight for wastewater treatment.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ziqiao Li,Yanan Che,Ming Chen,Jing Hu,Pan He,Xiang Sun,Xiaozhen Wu,Youliang Yao,Huili Zheng,Gang Liu,Xiaohui Yan
Helical micro-/nanoswimmers have been extensively explored as a miniaturized robotic tool for advanced biomedicine in the past two decades. However, the integration of biomedical functions on the existing swimmers remains insufficient to allow further in vivo developments. We propose a chemically engineered Spirulina microalgae with biogenic gold nanoparticles deposited in its cells and magnetite nanoparticles assembled on its surface. This biohybrid helical microswimmer is naturally of many desired functions and can be easily functionalized through surface modification and/or intracellular loading. The gold-enabled digital subtraction angiography of multimodal imaging function is highlighted herein. Such imaging modality makes real-time tracking possible in deep anatomical regions, guaranteeing precise in vivo navigation of our swimmers to specific lesions. Meanwhile, the gold-enhanced photothermal efficacy is also noteworthy. It regulates swimmer degradation via controlling photothermal heat and can be harnessed to implement targeted therapy, for which the targeting process and therapeutic effect are successfully demonstrated in a fluidic chip. Furthermore, the fabrication method is straightforward and cost-effective, suitable for mass production. All these results clarify the functionalization strategy enabled by biogenic intracellular deposition and provide a multifunctional biohybrid microswimmer.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yunjin Yao,Wei Wang,Hongwei Hu,Lijie Zhang,Ziwei Ma,Shaobin Wang
Nickel–manganese bimetallic sulfide microparticles in situ grown on Ni foam (NiMnS@NF) with controllable morphology and composition were developed via a hydrothermal method to boost potassium periodate activation for oxidation of multiple micropollutants. Benefiting from the unique morphology and structure, along with a synergistic effect of different components, the optimized NiMnS@NF exhibits outstanding performance and durability in potassium periodate activation, surpassing other oxidant systems (e.g., H 2 O 2 , peroxydisulfate, and peroxymonosulfate). Electron spin resonance analysis, scavenging tests, electrochemical analysis, and galvanic oxidation tests unveiled that NiMnS@NF can initiate the activation of potassium periodate, resulting in the formation of high-potential metastable intermediates (NiMnS@NF–potassium periodate*). Additionally, superoxide radical anions play a cooperative role in organic elimination. The experimental results further indicate that the synergy among Mn/Ni and S induces a local charge redistribution, improving electron transfer capability and Mn(II)/Mn(III)/Mn(IV) and Ni(II)/Ni(III) redox reactions. This work proposes a feasible and efficient monolithic catalyst for environmental remediation.
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