JOURNAL OF INORGANIC BIOCHEMISTRY
·
2022
·
IF 4.336
Qiong Liu,YingKai Wu,Ju Li,Ertao Liu,Fan Tian,Huiping Zhao,Rong Chen
Ag-decorated ZnO nanorods with different Ag contents were prepared by deposition-precipitation method, which demonstrated enhanced inhibition ability for the common pathogen, especially exhibited excellent antibacterial effects on clinical drug resistant bacteria. Moreover, Ag-decorated ZnO nanorods presented much lower cytotoxicity to HEK293 cell than that of silver nanoparticles (AgNPs). The electron spin resonance (ESR) spectra revealed that oxygen vacancies (V O ) were formed in ZnO after the decoration of AgNPs . To understand the improved antibacterial activity of Ag-decorated ZnO nanorods, reactive oxygen species (ROS) were determined. It was found that more H 2 O 2 were generated over Ag-decorated ZnO compared to pure ZnO, which was closely related to the oxygen vacancy (V O ) concentration. The production of large amount of H 2 O 2 resulted in more serious membrane leakage of cytosol and dehydrogenation inactivation of respiratory chain for bacterial, thus leading to the enhanced antibacterial activities of Ag-decorated ZnO nanorods.
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JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Chen Li,Guoqing Feng,Zonglin Pan,Menghan Sun,Xinfei Fan,Chengwen Song,Tonghua Wang
Treatment of antibiotics wastewater by electrocatalytic functional membrane has drawn much attention in recent years. One of the key factors that affects the membrane performance is the electrochemical activity of the electrocatalyst , which is crucial related to its morphology. Herein, a series of well-defined ZnO with different morphologies ranging from nanorods (NRs), nanoflowers (NFs) and nanoplates (NPs) were synthesized directionally with the induction of morphology-dependent functional ions by a facile electrodeposition method, thereby realizing the controllable preparation of morphological different ZnO/CMs. The intrinsic relationship between the morphology of electrocatalysts and their electrochemical properties was revealed and results indicated that ZnO NRs/CM exhibited the highest removal efficiency for the treatment of Amoxicillin synthetic wastewater. It was attributed to the largest surface of facet (0001) of NRs exposure, which strengthen the electrochemical property of ZnO NRs/CM with the fastest electron transfer rate and the highest rate of hydroxyl radical generation.
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CATALYSIS TODAY
·
2018
·
IF 4.667
Shuanglong Ma,Sihui Zhan,Yuguo Xia,Pengfei Wang,Qianlei Hou,Qixing Zhou
The Ag/ZnO/g-C 3 N 4 composite photocatalyst, which was synthesized by thermal polymerization of a melamine precursor combined with solvothermal reaction, was used as a visible-light-driven biocide toward Escherichia coli ( E. coli ). The Ag/ZnO/g-C 3 N 4 composite displayed considerably increased visible-light-driven bactericidal activity compared to g-C 3 N 4 , Ag/g-C 3 N 4 , and ZnO/g-C 3 N 4 powders. The photocatalytic destruction of E. coli cells was verified by fluorescence-based cell live/dead analysis and SEM. The mechanism of increased bactericidal effect was studied by UV–vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, photocurrent response, and electrochemical impedance spectroscopy (EIS). The enhanced photocatalytic bactericidal effect was attributed to the matching conduction band levels of g-C 3 N 4 and ZnO and the surface plasmon resonance (SPR) effect of Ag nanoparticles, which resulted in enhanced adsorption of visible light, reduced recombination of free charges, and rapid separation and transportation of photogenerated electrons-holes. The disinfection mechanism was investigated using different chemical scavengers and electron spin-resonance spectroscopy (ESR), and indicating the important role of h + and H 2 O 2 . Furthermore, taking into account the bulk availability and better bactericidal effect of Ag/ZnO/g-C 3 N 4 , this work provides a new pathway to develop advanced materials for water disinfection.
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Journal of Advanced Dielectrics
·
2024
·
IF 2.1
Yao Feng,Jinhua Li,Hao Yan
In this work, a series of BiFeO 3 /ZnO composites with varying molar ratio of BiFeO 3 to ZnO (Bi:Zn = 2.5:1, 5:1, 10:1, 20:1) have been synthesized via a one-step hydrothermal method and evaluated for their efficiency in rhodamine B (RhB) degradation performance. The morphology results reveal that the microsphere-shaped ZnO is dispersed on the surface of the blocky-like BiFeO 3 , with intimate contact between the two phases. It has been found that the maximum piezocatalytic activity could be achieved at BiFeO 3 /ZnO molar ratio of 5:1, with a degradation rate up to 92% for RhB. Compared with pure BiFeO 3 and ZnO, the composites have superior piezocatalytic degradation performance. The reason for the enhanced piezocatalytic dye degradation rate may be that the BiFeO 3 /ZnO composites effectively separate the positive and negative charges to reduce the recombination of positive and negative charges. These active species, such as superoxide radicals ( O 2 • − ) in the process of piezocatalytic, are proved on the active species capture experiments. The BiFeO 3 /ZnO composites have good piezocatalytic degradation performance, which provides an option for collecting vibration energy to degradation dye wastewater in the future.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Qi Xue,Tao Hang,Jianghu Liang,Chun-Chao Chen,Yunwen Wu,Huiqin Ling,Ming Li
Memristors have been seen as promising candidates for next-generation nonvolatile memory and neuromorphic computing . Solution-processed memristors can offer many advantages, such as low-cost fabrication, large-area uniformity, and high versatility. However, the high annealing temperature of the solution process and unsatisfactory performance are impeding the advancement of flexible memristors. In this work, the combustion method was proposed to fabricate the Mn-ZnO-based memristor without a high-temperature process on the flexible substrate. The device demonstrates stable bipolar resistive switching behavior with ultralow switching voltage (−0.6 V/0.71 V), high on/off ratio (˃ 2 × 10 3 ), multilevel storage capability, and uniform resistance distribution ( σ / µ = 18%/16%). The flexible device with a bend radius of 10 mm shows no obvious performance degeneration compared with the device in the flat state. Furthermore, tunable repetitively synaptic weight was achieved by the memristor. Synaptic plasticity functions, such as excitatory postsynaptic current, paired-pulse facilitation, and learning/forgetting behaviors, have been emulated. This work provides a simple and feasible strategy for fabricating the flexible high-performance memristor, with the expectation to facilitate the development of flexible electronics.
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SOLID STATE IONICS
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2024
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IF 3
Wenxuan Wang,Haohao Sun,Shan Hu,Zelang Jian,Wen Chen
Solid-state sodium metal batteries have attracted much attention due to the high energy density and safety. However, the poor physical contact and morphology instability at the anode interface decrease the dendrite tolerance of Na 3 Zr 2 Si 2 PO 12 at high current density . Herein, NaF/NaZn 13 multi-functional artificial layer is prepared by in-situ thermal decomposition and alloying reaction. The anode interface resistance is significantly decreased from 1258.5 to 41.5 Ω cm 2 due to the improved sodiophilic property. Moreover, the NaF/NaZn 13 interphase can promote the Na + diffusion and suppress the electron leakage at the interface, enabling a high critical current density of 2.4 mA cm −2 and a stable Na stripping/plating at 0.5 mA cm −2 for 500 h and 0.7 mA cm −2 for 200 h. The Na 3 V 2 (PO 4 ) 3 /Na all-solid-state battery shows excellent rate and cycling performance. This work proves the feasibility of fluorinated multifunctional interphase in realizing high current and dendrite tolerant solid-state electrolytes.
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MATERIALS LETTERS
·
2021
·
IF 3.423
Xudong Wu,Dayakar Gandla,Li Lei,Chaoxin Chen,Daniel Q. Tan
The primary strategy to increase dielectric constant and energy storage density is adding a high fraction of fillers with high dielectric constant to polymer matrix. Yet, it has not been very successful without encountering processing difficulties, lowered breakdown strength, and mechanical inflexibility. Herein, we introduce an unconventional approach using ultra-low fraction of zinc oxide core and boron nitride shell (ZnO@BN) filler with very high thermal conductivity dispersed in polyetherimide (PEI) for the same purpose. For the 0.1 vol% core-shelled fillers, the PEI composite film exhibits a superior dischargeable energy density of 10.8 J/cm 3 and a high efficiency of 92.1% at an electric field of 500 kV/mm. The polarization responses under high electric fields and simulation reveal the association with the increased interfacial polarization of the thermally conductive core-shelled structure. This strategy lays out a new route to further investigate of high energy density composite and capacitor technologies.
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RSC Advances
·
2017
·Vol. 7
·期 74
·46760-46766
·
IF 3.108
Mengjie Li,Weijun Huang,Weijin Qian,Boyang Liu,Hao Lin,Wei Li,Li Wan,Changkun Dong
Ag–ZnO nanocomposites were prepared on alloy substrates by two simple and inexpensive steps, i.e. synthesis of ZnO nanorod arrays (ZNAs) by a low-temperature hydrothermal method, followed by electrophoretic deposition method to coat ZNAs with Ag nanoparticles (NPs). The sizes and densities of the Ag NPs could be facilely adjusted by changing the deposition time. The field emission (FE) performances of Ag–ZnO emitters were improved greatly by adjusting the sizes and densities of the Ag NPs, and the optimized FE performance of the Ag–ZnO emitter was obtained with the lowest turn-on field of 0.86 V μm−1 and a current density up to 7.96 mA cm−2 at 4.45 V μm−1. More importantly, the Ag–ZnO emitter exhibited excellent current stabilities with 1900 min operation under only 6.5% current fluctuation. These results suggest that the Ag–ZnO composite is a promising cathode material for fabrication of future FE devices.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Weili Ye,Jin Li
Formaldehyde vapor (CH 2 O) is a well-known hazardous gas. Long-term exposure to high concentrations of CH 2 O can cause chronic respiratory diseases in humans and increase the risk of cancers such as leukemia and nasopharyngeal cancer. Zeolite imidazolic frame-67 (ZIF-67) has a high specific surface area and porosity; therefore, it can be used to prepare gas-sensitive materials. In this study, rod-flower-like ZnO was obtained by activation of the rod ZnO using 2-methylimidazole. The ZIF-67-coated rod-flower-like ZnO was then used to synthesize ZnO@ZIF-67 (ZZ67). Experimental and theoretical analyses showed that the ZIF-67 on the ZZ67 surface provided abundant active sites for pure ZnO, which helped to capture target gas molecules more quickly in the experimental atmosphere and realize susceptible detection. Moreover, ZZ67 had a high response (1210) to 500 ppm of CH 2 O at room temperature (~25 ℃), which was 4.8 times the response of activated ZnO (251). Furthermore, owing to the high hydrophobicity of ZIF-67, ZZ67 was mainly unaffected by humidity. Overall, ZZ67 exhibited good selectivity, a high response to CH 2 O, and low sensitivity to high relative humidity.
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产品关联
DOI
高影响因子
iScience
·
2025
·
IF 4.1
Yichao Tao,Wenbin Zhuang,Wensi Fan,Longxiang Zhou,Lihong Fan,Huanlong Qin,Yefei Zhu
Recent advancements in sonodynamic therapy (SDT) for cancer treatment have highlighted the potential of enhancing reactive oxygen species (ROS) generation and improving therapeutic outcomes. This study introduces zinc oxide (ZnO) nanorods (NRs) in situ loaded with silver nanoparticles (ZnO@Ag NRs), designed to optimize ROS production under ultrasound irradiation and offer significant advantages in tumor specificity and biosafety. The transmission electron microscopy and elemental mapping confirmed the consistent size and monodispersed Ag nanoparticle for ZnO@Ag NR. Sonodynamic properties showed that ZnO@Ag NRs produce higher singlet oxygen and hydroxyl radicals under ultrasound. In vitro studies demonstrated excellent biocompatibility and enhanced cell-killing effects of ZnO@Ag NRs on CT-26 cells, while in vivo results confirmed its superior anti-tumor efficacy and biosafety. Furthermore, the ZnO@Ag NRs’ antibacterial properties were also confirmed, suggesting additional benefits in treating cancers associated with bacterial infections. Collectively, these findings establish ZnO@Ag NRs as a potent and safe agent for ultrasound-driven cancer therapy.
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Shuo Yang,Kaiyue Li,Wei Feng,Ping Huang,Keyan Liu,Yuquan Zhuo,Wenhui Li,Ziwen Yang,Donglai Han
As the widespread discharge of antibiotics, pesticides, and dyes exacerbates water pollution, the development of efficient photocatalytic materials has become crucial for addressing this challenge. In this study, a new paradigm of n-p-p ternary heterojunction photocatalyst composed of ZnO nanospindle, Ag2CO3, and Ag2O nanoparticles was synthesized via a hydrothermal and coprecipitation method followed by calcination. By adjusting the calcination time, the phase transition from Ag2CO3 to Ag2O was precisely controlled, leading to enhanced charge separation, transition, and improved light absorption properties. The prepared ZnO/Ag2CO3/Ag2O (Z/AC/A) photocatalyst exhibited outstanding photocatalytic performance for the degradation of typical water pollutants, including 2,4-dichlorophenol (2,4-D), tetracycline (TC), and malachite green (MG) under simulated sunlight irradiation. And the photocatalytic efficiencies reached 90.8, 94.8, and 97.4%, respectively, with the ZnO/Ag2CO3/Ag2O photocatalyst, which was calcined at 195 °C for 12 min, abbreviated as Z/AC/A-3, demonstrating the highest activity. Radical scavenging experiments and electron spin resonance (ESR) tests revealed that superoxide radicals (•O2–) serve as the dominant active species, while holes (h+) and hydroxyl radicals (•OH) play secondary roles in the photocatalytic process. Additionally, the photocatalytic degradation mechanism was confirmed to follow a dual Z-scheme charge transfer pathway, which effectively enhanced the charge separation and photocatalytic performance. The photocatalyst also exhibited excellent structural stability and reusability over five consecutive cycles. These results suggest that the Z/AC/A n-p-p ternary heterojunction holds promising potential for practical photocatalytic applications in environmental remediation.
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jianxing Feng,Zhenqing Guo,Runli Li,Chaoqun Zhang,Ting Du,Xiang Li,Xuewei Yang,Junchen Zhuo,Yanmin Liang,Yaru Han,Jianlong Wang,Shuo Shi,Wentao Zhang
Recent advances in functionalized micro-nanostructures have enlightened promising non-thermal-dependent antibacterial strategies with broad applications in preventing agrofood spoilage, clinical infections, and environmental pollution caused by pathogens. These advances highlight the need for precise design of efficient and multi-mode bactericides. Herein, photosensitive vitamin B 2 (VB 2 ) was exploited to functionalize semiconductors with limited visible-light response and intrinsic antibacterial activity, while ZnO served as a paradigm for the fabrication of VB 2 -functionalized zinc oxide (VB 2 -ZnO) with persistent antibacterial effects. The enhanced visible photocatalytic activity and the released Zn 2+ in VB 2 -ZnO contribute to potent antibacterial and anti-biofilm effects by disrupting bacterial structures and inducing oxidative stress. Furthermore, the successful fabrication of composite films incorporating VB 2 -ZnO and natural locust bean gum (LBG) exhibited improved physicochemical properties and persistent antibacterial effects, resulting in the shelf-life extension of perishable berries. This work pioneers a novel approach to functionalizing semiconductor photocatalysts with VB 2 photosensitizer, offering novel solutions for ensuring agrofood safety through multi-mechanism antibacterial materials.
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