Polymers
·
2025
·Vol. 17
·期 10
·1356
·
IF 4.9
Yumeng Guo,Qian Wang,Guoming Sun,Ying Zheng
Developing an oral fibrous barrier membrane that prevents bacterial invasion while possessing antibacterial properties and facilitating fluid decompression remains a significant clinical and scientific challenge. In this study, we developed a novel Janus membrane by modifying a polypropylene (PP) fibrous membrane with dopamine and zinc oxide nanoparticles (ZnO-NPs). Fabricated via a simple floating immersion method, this asymmetric bilayer structure consists of a hydrophobic PP layer and a hydrophilic PP/dopamine@30 nm ZnO layer, providing both antibacterial properties and enhanced fluid filtration. The mechanical properties of the PP/ZnO membrane were significantly enhanced, with an increase in the Young’s modulus and ultimate tensile strength, indicating improved strength. Antibacterial activity againstStreptococcus mutans(S. mutans) demonstrated a significant reduction in biofilm formation on the PP/dopamine@30 nm ZnO surface compared to unmodified PP. Water flux tests confirmed a stable, high filtration rate, with increased permeability under rising pressure. In vivo experiments with miniature pigs confirmed reduced bacterial presence on the sterile side of the membrane. These findings highlight the potential of the membrane for oral exudate filtration, extending filtration time and minimizing infection risks under strict sterility conditions. Further improvements in barrier properties are necessary to optimize its clinical performance.
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DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Li Mingguang,Li Jing,Yu Longsheng,Zhang Ying,Dai Yizhong,Chen Runfeng,Huang Wei
Trap-assisted recombination loss in the cathode buffer layers (CBLs) is detrimental to the electron extraction process and severely restricts the power conversion efficiencies (PCEs) of organic solar cells (OSCs). Herein, a novel organic–inorganic hybrid film composed of zinc oxide (ZnO) and 2,3,5,6-tetrafluoro-7,7,8, 8-tetracyanoquinodimethane (F4TCNQ) is designed to fill the intrinsic charge traps of ZnO-based CBLs by doping F4TCNQ for high-performance inverted OSCs. Thus, constructed ZnO:F4TCNQ hybrid film exhibits enhanced surface hydrophobicity and adjustable energy levels, providing favorable interfacial condition for electron extraction process. Consequently, trap-assisted recombination loss in the CBLs was efficiently suppressed, leading to the significantly improved fill factor and PCEs of both fullerene- and non-fullerene-based OSCs using the ZnO:F4TCNQ hybrid CBLs. This work illustrates a convenient organic acceptor doping approach to suppress the internal charge traps of traditional inorganic CBLs, which will shed new light on the fabrication of high-performance CBLs with facile electron extraction processes in inverted OSC devices.
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PubMed
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Yanwei Cao,Yao Peng,Danyang Cheng,Lin Chen,Maolin Wang,Cheng Shang,Lirong Zheng,Ding Ma,Zhi-Pan Liu,Lin He
The conversion of carbon monoxide (CO) into high-value organic molecules has long been pursued by both industry and academia. One of the central challenges is to realize carbon–carbon coupling with high selectivity for CO insertion. We report here a highly selective Au/ZnO composite catalyst for one-step oxidative coupling of CO with secondary amines, producing oxamides. The reaction is >99% selective under ambient conditions, which exhibits a subtle change of catalyst activity over ∼120 h in a fixed-bed reactor. A combination of microscopic and spectroscopic studies (including X-ray photoemission spectroscopy, X-ray absorption spectroscopy, CO-Fourier transform infrared spectroscopy, and aberration-corrected high-angle annular dark-field scanning transmission electron microscopy) and machine learning reveal that the active site is the Au–ZnO interface with a Au nanocluster attached to the ZnO support via nonstoichiometric ZnOx (x > 1) linkages. The reaction mechanism and key reaction intermediates were confirmed by density functional theory calculations and in situ diffused reflectance infrared Fourier transform spectroscopy signals. Our results open an avenue in heterogeneous catalysis to achieve the ambient-condition CO transformation by exploiting the interfacial synergistic effects.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2022
·Vol. 26
·期 11
·2515-2525
·
IF 2.747
Zhou Huilian,Yan Siming,He Yi,Xiang Yuxin,Li Hongjie,Song Ruxia,Cheng Xinyu,Yan Liping,Song Jinxue,Shangguan Jianxin
There are two key factors in the fabrication of superhydrophobic surfaces. One is to have the appropriate micro/nano structure, and the other is to reduce the surface energy of the solid surface. In this work, the cyclic voltammetric electrodeposition method (CVE) was used to construct the micro/nano rough structure of zinc oxide nanosheets (ZnO NS) on steel sheets. Triethoxy(octyl)silane (TTOS) is used to reduce the surface energy of solid surfaces. Their synergistic effect fabricated a superhydrophobic surface (ZnO NS-TTOS). X-ray photoelectron spectroscopy (XPS) and contact angle measurement (CA) confirmed the successful fabrication of superhydrophobic surfaces. The surface roughness and morphology were characterized by 3D optical profiler and scanning electron microscope (SEM). The results showed that the hydrophobic modification of TTOS thickened the zinc oxide film and greatly enhanced the anti-corrosion performance of the zinc oxide film. The influence of voltage range on contact angle and the synthesis mechanism of zinc oxide nanosheets are discussed. In addition, the Tafel curve shows that the fabricated superhydrophobic surface can achieve 99.83% corrosion inhibition rate compared with blank steel and electrochemical impedance spectroscopy (EIS) is used to explore its anti-corrosion mechanism. Finally, anti-fouling performance and photoelectric effect tests show that the fabricated superhydrophobic surface can resist and photodegrade pollutants, which further improves the versatility of the superhydrophobic surface.
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Science of Advanced Materials
·
2015
·Vol. 7
·期 3
·526-531
·
IF 2.598
Chen Xiang,Gao Qian,Xiang Di,Lin Huiming,Han Xiao,Li Xin,Du Shantao,Qu Fengyu
Porous ZnO nanofibers were prepared through the electrospun method using zinc acetate as zinc source and polyvinylpyrrolidone as thickener agent. Under adjusting the amount of zinc acetate, the synthesized porous ZnO nanofibers show various structures (fiber, tube, and fiber-in-tube).
And the formation mechanism was discussed in detail. These porous ZnO samples show the uniform structure about 200 to 300 nm in diameter and several microns in length. All the fibers are composed of many ZnO nanoparticles (20–30 nm) that assemble to form the porous structure and induce
the large surface area and high pore volume of the sample. These porous ZnO nanofibers were configured as high performance sensors for acetone sensing, showing high sensitivity (S = 243.3 at 500 ppm), low detection limit (10 ppm), fast response/ recovery (7/17 s), and very good selectivity.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Manman Xie,Dongdong Zhang,Yiqing Wang,Yiping Zhao
Reduced graphene oxide/zinc oxide-rods composites (RGO/ZnO) were prepared through simple hydrothermal treatment of graphene oxide /zinc peroxide (GO/ZnO 2 ) microspheres. The results of TEM, SEM and XRD show that the rod-like structure ZnO were successfully transformed from ZnO 2 microspheres after high temperature treatment and combine well with GO . The synthesized RGO/ZnO-rods composites showed better photocatalytic performance as compared to pure ZnO 2 , ZnO and GO/ZnO 2 under UV and visible-light irradiation. The improved photocatalytic performance of RGO/ZnO-rods composites was attributed to the uniform structure and excellent electrical conductivity of RGO, which could reduce the combination rate of the photo electron-hole pairs. After 5 consecutive cycles of testing, the RGO/ZnO-rods composites still have excellent photocatalytic performance, which was found to depend on ZnO content and NaCl concentration but was not affected by pH. The result of ESR experiment confirmed that the superoxide radicals (O 2 − ) and hydroxyl radicals (O H) play an important role in the decolorization process of MO. Additionally, the kinetic rate constant (K) and mechanism of RGO/ZnO-rods composites had also been studied.
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Materials
·
2020
·Vol. 13
·期 18
·3950
·
IF 3.057
Minmin Chen,Jinxia Hu,Cancan Bian,Chenghao Zhu,Chen Chen,Zhijun Guo,Zhimin Zhang,Godfred Amfo Agyekum,Zhuoqi Zhang,Xichuan Cao
As a drug delivery system (DDS), traditional mesoporous silica nanoparticles (MSNs) suffer from bioaccumulation in vivo and premature drug release in systemic circulation due to low degradation rate and lack of protective gatekeeper. Herein, we developed a safe and intelligent DDS with characteristics of pH-responsive biodegradation and controlled drug release based on mesoporous silica composite nanoparticles (MSCNs) capped with ZnO quantum dots (ZnO QDs). Acidic degradable MSCNs were successfully synthesized by doping Ca2+and PO43−into the MSNs’ framework. The in vitro doxorubicin hydrochloride (DOX) release was inhibited at neutral pH 7.4 but triggered significantly at pH 5.0 due to the dissociation of ZnO caps. The internalization behavior and cytotoxicity of 4T1 cells indicated MSCNs-ZnO could efficiently deliver DOX into the cells with significant antitumor activity. Such a DDS with pH-responsive biodegradation and controlled drug release has promising potential for cancer therapy.Keywords:mesoporous silica composite nanoparticles (MSCNs);ZnO QDs;pH-responsive biodegradability;pH-responsive drug delivery
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PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yuhang Chen,Qi Xue,Weiguo Luo,Yu Sun,Xiaonong Zhang,Di Lu,Xin Qian,Chun-Chao Chen,Ming Li,Tao Hang
Zinc oxide nanoparticles (ZnO NPs) as promising and nontoxic fluorescent labels are currently developed for cell imaging owing to their excellent biocompatibility. However, the low intensity of the emission band and stability of ZnO NPs have restricted their further applications. In this work, 5 mol % rare-earth metal erbium (Er)-doped ZnO nanoparticles with poly(ethylene glycol) (PEG) surface modification (Er-doped ZnO/PEG NPs) are fabricated by the sol–gel method. Their fluorescence characteristics and biodegradation behavior are investigated. The results indicate that the visible photoluminescence of Er-doped ZnO/PEG NPs has been dramatically enhanced by 631.6% compared with that of bare ZnO NPs. After being stored for one month, particle size variation is less than 1 nm, and fluorescence performance can be well retained. Furthermore, the degradation and cytotoxicity results confirm the degradable and biocompatible characteristics of Er-doped ZnO/PEG NPs, thus extending their potential applications for cell imaging.
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高影响因子
MOLECULES
·
2019
·Vol. 24
·期 3
·522
·
IF 3.06
Hongwu Wang,Ding Wang,Liang Tian,Huijun Li,Ping Wang,Nanquan Ou,Xianying Wang,Junhe Yang
In order to obtain acetone sensor with excellent sensitivity, selectivity, and rapid response/recovery speed, graphene-like ZnO/graphene oxide (GO) nanosheets were synthesized using the wet-chemical method with an additional calcining treatment. The GO was utilized as both the template to form the two-dimensional (2-D) nanosheets and the sensitizer to enhance the sensing properties. Sensing performances of ZnO/GO nanocomposites were studied with acetone as a target gas. The response value could reach 94 to 100 ppm acetone vapor and the recovery time could reach 4 s. The excellent sensing properties were ascribed to the synergistic effects between ZnO nanosheets and GO, which included a unique 2-D structure, large specific surface area, suitable particle size, and abundant in-plane mesopores, which contributed to the advance of novel acetone vapor sensors and could provide some references to the synthesis of 2-D graphene-like metals oxide nanosheets.Keywords:ZnO/GO nanosheets;nanocomposites;acetone gas sensors;two-dimensional structure
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Biyan Chen,Yafeng Huang,Qingguang Xiao,Tianhao Wang,Yechen Hu,Xiufang Chen,Fengtao Chen,Wangyang Lu
Copper-based agents have been utilized widely in a range of commercial antibacterial products due to their superior release-killing antibacterial properties. However, the environmental concerns associated with the release of Cu2+ ions have restricted their application in textiles. In this study, Cu3P-ZnO nanocomposites with enzyme-like properties were synthesized through the phosphating of CuO-ZnO, which were employed to functionalize the surface of cotton fabric using a dipping–padding–drying method. The physicochemical properties of the functional cotton fabrics were characterized using various techniques. The antibacterial efficacy of Cu3P-ZnO/cotton was assessed against Gram-negative E. coli and Gram-positive S. aureus bacteria. Remarkably, Cu3P-ZnO/cotton demonstrated significant antibacterial activity and stability without necessitating auxiliary conditions; achieving >99% antibacterial effectiveness against both E. coli and S. aureus, while retaining 94.7% efficiency after 50 washing cycles. The underlying antibacterial mechanism was elucidated, revealing that reactive oxygen species (ROS), especially singlet oxygen (1O2), plays a crucial role in mediating the antibacterial action of Cu3P-ZnO/cotton in absence of light, whereas direct contact between Cu3P-ZnO and bacteria serve secondary functions in this process. This research provides valuable insights into the design of ROS-mediated antibacterial agents for applications in antimicrobial textiles.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Ruobing Zheng,Yu Yang,Qian Chen,Jie Huan,Lili Zhu,Yuping Sun,Xuebin Zhu
Co 3 O 4 catalysts were grown on ZnO/carbon cloth (CC) by electrodeposition and then the ZnO layer was etched by KOH, and the electrocatalytic water oxygen evolution reaction was investigated. The introduction and etching of ZnO layer can enhance the specific surface area of Co 3 O 4 due to the increased interface between Co 3 O 4 layer and CC as well as the smaller grain size, leading to more active site exposure. Moreover, oxygen vacancies were increased obviously through the above processing, leading to the further improvement in oxygen evolution reaction performance. The porous Co 3 O 4 through ZnO etching was exhibited 337.40 and 385.40 mV at the current density of 10 and 40 mA cm −2 , respectively, and the Tafel slope of porous Co 3 O 4 through ZnO etching is 79.60 mV dec −1 . The results will provide a feasible route to optimize the oxygen evolution reaction performance of Co 3 O 4 catalysts.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Lijia Zhao,Shupeng Sun,Su Zhang,Zhi Liu,Baoyu Huang,Nan Wang,Jianwei Zhang,Xiaogan Li
The hollow ZnO @ TiO 2 heterostructured nanospheres were synthesized by hydrothermal method using carbon nanospheres as sacrificed templates. With UV activation, the response of ZnO @ TiO 2 based chemiresistive-type sensors to 10 ppm formaldehyde is 11.02 at room temperature which is 5.48 times larger than that of the pure hollow ZnO. The response and recovery time significantly reduced to 14 s and 16 s. Selectivity, stability and repeatability of the hollow ZnO @ TiO 2 based sensor under UV-activation have also been examined. The sensing mechanism of the sensor to formaldehyde have been investigated by AC impedance spectroscopy , in-situ DRIFTS , and DFT theoretical calculation.
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高影响因子
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