CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2019
·Vol. 35
·期 5
·924-928
·
IF 1.071
Xiang Siyuan,Meng Qingnan,Zhang Kai,Gu Yue,Liu Wendong,Yang Bai
Using dextran as both reductant and stabilizing agent, nanopetals(ZnO-Au NPs) were easily synthesized and possessed a petal-like morphology. The feature structure and size of such ZnO-Au NPs were adjustable by regulating the amount of chloroauric acid(HAuCl 4 ). Moreover, the electrochemical property of the obtained NPs was evaluated by being immobilized on the glassy carbon electrode(GCE), which performed both high sensitivity and stability in dopamine(DA) determinations. Furthermore, the as-prepared ZnO-Au NPs could also detect DA and uric acid(UA) simultaneously in the mixture without interference, indicating good selectivity and showing promising potential in biosensing.
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Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Yulin Ma,Mingming Liu,Yange Feng,Hongyu Zheng,Yongling Wu
Piezoelectric polyvinylidene fluoride (PVDF) based piezoelectric materials are good candidates for energy harvesting devices and sensing systems. Improving the piezoelectric sensitivity of the electro-spun PVDF fibers is still challenging and highly desirable. In this work, ZnO@Ag nanoparticles were synthesized and utilized as surface modifier to generate a hierarchical structure on the fiber surfaces to construct a flexible and piezoelectric three-phase coupling sensor. The effects of the atomic ratio of Ag:ZnO, surface morphology and particle concentration of ZnO@Ag nanoparticles on the β-phase content, piezoelectricity, wettability and mechanical stability of the sensor device were systematically investigated. The elastic modulus of ZnO@Ag/PVDF membrane is 0.01322 GPa, which is close to that of human skin 0.0188 GPa. Due to synergistic effect of the enhanced electrostatic field polarization and surface hierarchical structure, the ZnO@Ag/PVDF piezoelectricity sensor possessed voltage and current outputs of 15.0 V pp and 1.775 μA respectively, which were 3.5 and 5.4 times higher than pure PVDF-based sensor. The sensitivity of the ZnO@Ag/PVDF nanofiber-based sensor was 2.422 V/kPa, which was 14.4 times higher than that of pure PVDF-based sensor. The sensor has a fast response/recovery time of 30/45 ms. The sensor can accurately detect various physiological strain signals such as cantilever oscillatory excitation, finger press, or walking behavior, and can light-up several light-emitting diodes (LEDs) and charge a capacitor (20 μF) in a short period (2.41 V in 5 Sec). This fiber-based energy harvesting and pressure sensor demonstrates promising applications in self-powered flexible wearable electronic devices in healthcare and home-care fields.
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Environmental Science-Nano
·
2019
·Vol. 7
·期 1
·327-338
·
IF 7.704
Tao Wang,Yangyang Liu,Yue Deng,Hanyun Cheng,Yang Yang,Kejian Li,Xiaozhong Fang,Liwu Zhang
Atmospheric photochemistry is widely regarded as an important pathway for SO2 oxidation. The influence of irradiation intensity, especially photochemistry under weak sunlight during heavy haze events is not known. This work investigates the irradiation-intensity-dependence of the dust-related heterogeneous process using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and ex situ flow reaction. Illumination of the particles alters the surface oxygen species, and further accelerates the significant oxidation of sulfite species to sulfate products. The sulfate formation rate grows rapidly from the dark state to faint irradiation, while it becomes insensitive to irradiation intensity variation under strong illumination. According to the photo-electrochemical tests and concentration dependence experiments, this interesting phenomenon can be interpreted by the presence of excess SO2 under weak sunlight and sufficient photoinduced active species (PAS) under strong illumination. This uneven promotion effect is beneficial for explaining the sulfate burst under faint sunlight during heavy haze events. More significantly, the uptake of SO2 accounts for the increase of acidic species and the decrease of adsorbed water on the particle surface, thus elevating the particle acidity. Under these circumstances, the dissolution of zinc oxide (ZnO) takes place, and results in diverse principal products varying with the illumination condition, e.g. ZnSO3 under weak sunlight while ZnSO4 under strong irradiation. In general, photochemistry has profound impacts on atmospheric sulfur cycling, as well as the cycle of metal elements. The irradiation intensity dependent effects imply the raising uncertainty in the current air quality models.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Peiyuan Zhang,Biao Zhang,Ting Yu,Hui Wu,Kai Liu,Lihui Chen,Xiaxing Zhou
The development of hydrogels with high mechanical strength, ionic conductivity and electrochemical activity is crucial for advancing flexible supercapacitors. In this study, zinc oxide nanoparticles (ZnO NPs), recognized for their high chemical activity and conductivity, were incorporated into dual-network hydrogel based on poly (acrylic acid- co -acrylamide) (P (AA- co -AM)) matrix to improve its properties. By optimizing the ratio of AA to AM and adjusting the amounts of AlCl 3 and ZnO NPs, the -COO - groups in AA and the -CONH 2 in AM form a hydrogen bond network. This network effectively integrated the -SO 3 - groups of lignosulfonate (LS) with Zn 2+ , and Al 3+ ions, establishing a multi-pathway ion transport system that served as a dual conductive channel. Leveraging the nanoscale effect, the transport of Zn 2+ and Al 3+ connection framework enhanced the tensile strength from 140.48 kPa to 420.16 kPa by three times. The optimized flexible supercapacitor exhibited a specific capacitance of 99.63 F g −1 , accompanied by exemplary flexibility, with capacitance retention rate of 80.63 % and nearly 100 % coulomb efficiency. This strategy offers a new framework for designing hydrogel electrolytes with high mechanical strength and ionic conductivity, suitable for use in high-performance energy storage devices.
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ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2025
·
IF 2.9
Hu Wenquan,Chen Zhikang,Chen Qi,Zhu Xixi,Qin Yifan,Wang Ming
Heterogeneous photocatalysis has been widely recognized as one of the most effective methods for organic wastewater treatment. In this study, ZnFe 2 O 4 /ZnO nanocomposite were successfully synthesized via a one-step hydrothermal method and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), UV–Visible diffuse reflectance spectroscopy (DRS), and Brunauer–Emmett–Teller specific surface area analyzer (BET). The photocatalytic activities of ZnFe 2 O 4 /ZnO nanocomposites were evaluated in the degradation of organic pollutants under ultraviolet irradiation. The results demonstrate that ZnFe 2 O 4 /ZnO nanocomposites exhibited superior photocatalytic activity in degrading methylene blue (MB), ofloxacin antibiotic (OFL), and sulfadiazine (SDZ), which the degradation rates for MB, OFL, and SDZ were 95.90%, 75.83%, and 72.32%, respectively, with corresponding degradation times of 70 min, 160 min, and 90 min. These values represented respective improvements of 30%, 47.03%, and 27.72% compared to ZnFe 2 O 4 nanomaterials, as well as enhancements of 2.05%, 19.53%, and 19.52% relative to ZnO nanomaterials. The formation of ZnFe 2 O 4 /ZnO heterostructure effectively suppressed electron–hole recombination, thereby significantly enhancing both the activity and stability of the photocatalysts. Furthermore, The findings from the photocatalytic cyclic degradation experiment demonstrate that the ZnFe 2 O 4 /ZnO nanocomposites exhibit excellent reusability as photocatalysts and hold significant potential for application in the treatment of industrial wastewater containing organic pollutants.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 24
·1-13
·
IF 2.8
Yang Xinjuan,Li Yunkai,Li Xiaolong,Wang Lige,Liu Jing
Tin selenide (SnSe), a prominent narrow-bandgap p-type semiconductor in the IV-VI group, has garnered significant research interest due to its exceptionally low thermal conductivity and remarkable thermoelectric performance. This study systematically investigates the synergistic effects of zinc oxide (ZnO) particle size variation (30 nm, 200 nm, and 45 μm) and composite ratios on the thermoelectric transport properties of SnSe matrix composites fabricated through hydrothermal synthesis at 140°C with a 14 h reaction time. Experimental results demonstrate that the incorporation of 45 μm ZnO particles at an optimal 2% mass ratio substantially enhances the thermoelectric performance of ZnO/SnSe composites, achieving a peak thermoelectric figure of merit ( ZT ) value of approximately 1.5 ± 0.1 at 773 K, with an average ZT of 0.9 across 373–773 K. This significant improvement highlights the critical role of secondary phase particle size optimization in developing high-efficiency thermoelectric materials.
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Polymers
·
2023
·Vol. 15
·期 8
·1906
·
IF 5
Xinxin Liu,Dengbang Jiang,Yuyue Qin,Zhihong Zhang,Mingwei Yuan
With the increasing environmental pollution caused by disposable masks, it is crucial to develop new degradable filtration materials for medical masks. ZnO-PLLA/PLLA (L-lactide) copolymers prepared from nano ZnO and L-lactide were used to prepare fiber films for air filtration by electrospinning technology. Structural characterization of ZnO-PLLA by H-NMR, XPS, and XRD demonstrated that ZnO was successfully grafted onto PLLA. An L9(43) standard orthogonal array was employed to evaluate the effects of the ZnO-PLLA concentration, ZnO-PLLA/PLLA content, DCM(dichloromethane) to DMF(N,N-dimethylformamide) ratio, and spinning time on the air filtration capacity of ZnO-PLLA/PLLA nanofiber films. It is noteworthy that the introduction of ZnO is important for the enhancement of the quality factor (QF). The optimal group obtained was sample No. 7, where the QF was 0.1403 Pa−1, the particle filtration efficiency (PFE) was 98.3%, the bacteria filtration efficiency (BFE) was 98.42%, and the airflow resistance (Δp) was 29.2 Pa. Therefore, the as-prepared ZnO-PLLA/PLLA film has potential for the development of degradable masks.
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PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Menghan Yu,Haiyan Wu,Yuhang Meng,Menghan Qu,Huaming Yang
Given the global proliferation of pathogenic microorganisms , there exists a pressing imperative to cultivate efficacious nanomaterials possessing antimicrobial attributes, thereby impeding the transmission of infectious diseases. Clay-based nanoparticles , due to their inherent properties, serve as optimal candidates for the creation of innovative antimicrobial agents, particularly for coating materials . In this study, ZnO nanoparticles were synthesized on talc surfaces and doped with Ag + , yielding an effective antimicrobial composite (Ag-ZnO/talc). The primary aim was to comprehensively evaluate the antimicrobial effectiveness, material compatibility, and biosafety of Ag-ZnO/talc, as well as its potential applications in antibacterial coatings . The finding underscored the remarkable antibacterial properties of Ag-ZnO/talc composites, chiefly through the generation of reactive oxygen species , leading to impairment of the bacterial membrane and leakage of nucleic acid content. A biosafety evaluation indicated minimal cytotoxicity, a low hemolysis rate, and negligible skin tissue reactions, thereby suggesting its suitability for human application. Furthermore, the incorporation of the antimicrobial agent Ag-ZnO/talc did not significantly alter the physicochemical characteristics of the coating, while maintaining an enduring antimicrobial effect for a duration of two months. These findings establish the potential of clay-based antimicrobials for effective and safe application in coatings, facilitating the development of antimicrobial coatings in diverse industrial and public health environments.
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SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Zefei Yu,An Du,Chenyang Wang,Ruina Ma,Yongzhe Fan,Xue Zhao,Xiaoming Cao
Herein, a ZnO-doped plasma electrolytic oxidation (PEO) composite coating was prepared on the surface of a 1060 Al alloy by adding ZnO nanoparticles (ZnO-NPs) to the composite electrolytes of alkaline sodium silicate (Na 2 SiO 3 ) and sodium hexametaphosphate ((NaPO 3 ) 6 ). To efficiently investigate the coating's microstructure, the detached PEO coating was prepared without damage via an electrochemical method. The morphology and phase composition of the PEO coating were analyzed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and X-ray diffraction (XRD), and an incorporation model of ZnO-NPs was established. The results showed that the addition of ZnO-NPs slightly prolonged the anodic oxidation time and increased the breakdown voltage, whereas the working voltage and final voltage decreased slightly. The XRD results indicated that although the addition of ZnO-NPs did not result in the production of Zn-containing phases, it affected the formation and transformation reactions of other phases. SEM micrographs of the fractured cross-section of detached coating and coating/substrate interface indicated that the ZnO-NPs did not enter the interface layer, nor did it participate in the formation of the cap structure at the interface. Based on the experimental results and the “cascade discharge” model, an incorporation model of ZnO-NPs in PEO has been proposed.
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JOURNAL OF CULTURAL HERITAGE
·
2019
·
IF 1.955
Minghao Jia,Xiaogang Zhang,Jiajia Weng,Jie Zhang,Meifang Zhang
Coating of ZnO-cellulose composites on paper surface has potential technological applications. With this motivation, a simple approach of synthesizing ZnO nanoparticles in cellulose nanocrystals (CNC) by in-situ solution casting is reported in this work. The surface morphology of ZnO nanoparticles combined with cellulose fibers and the distribution of these ZnO-cellulose composites on the paper surface were characterized by scanning electron microscopy. The results showed that ZnO nanoparticles are easily and uniformly dispersed in the CNC. The ZnO-cellulose composite nanofluids were prepared by dispersing the composites in isopropanol as a base fluid. To determine the protective potential of these coatings, the chemical and mechanical properties of coated papers after dry heat and UV accelerated aging were measured. Also, a good color stability of the paper coated by the nanocomposites was observed through colorimetric measurements . The paper coated with ZnO-cellulose composites was found to possess antibacterial and antifungal activity against five common fungi (Aspergillus niger, Aspergillus Versicolor, Rhizopus nigricans, Saccharomycetes, Mucor) observed in the archive or museum and two bacteria (Staphylococcus aureus and Escherichia coli) in common life.
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Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 48
·8148-8162
·
IF 4.776
Qi Cai,Jiating Xu,Dan Yang,Yunlu Dai,Guixin Yang,Chongna Zhong,Shili Gai,Fei He,Piaoping Yang
Designing multifunctional nanoplatforms for the purpose of simultaneous theranostic modalities is critical to address the challenges of cancer therapy. Also, single modalities of phototherapy, including photothermal therapy (PTT) and photodynamic therapy (PDT), cannot meet the requirements of highly efficient treatment. Here, a core–shell–shell nanostructure consisting of a core of upconversion nanoparticles (UCNPs), a layer of mesoporous silica with anchored ZnO nanodots, and an outer layer of polypyrrole (PPy) was developed. In the proposed construct, the emitted ultraviolet (UV) light from the UCNPs core upon 980 nm near-infrared light irradiation can trigger the ZnO nanodots to activate ambient O2 molecules around cancerous tissues to produce toxic reactive oxygen species (ROS), realizing the PDT function. On the other hand, the coated PPy layer can concurrently give rise to an obvious heat effect upon NIR light illumination, thus achieving synergistic PDT and PTT effects; this results in excellent anti-tumor efficiency in vitro and in vivo. Furthermore, in hand with the upconversion luminescence (UCL) and computed tomography (CT) imaging derived from the UCNPs core, dual-mode imaging directed cancer therapy has been realized.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zheyan Hu,Sarula Li,Feng Li,Tianqi Wang,Hong Shao,Xiangting Dong
Herein, ZnO-SnO 2 Janus nanofibers (NFs) were synthesized by a parallel electrospinning method and its sensing performances were tested. Considering the compositions of the two metal oxide semiconductors in Janus structure, different ratios of ZnO and SnO 2 were designed and controlled. The optimum ratios of ZnO and SnO 2 was 1:2 by analyzing their sensing performances to triethylamine (TEA) gas. Gas sensors based on ZS-12 Janus NFs exhibited a high response to TEA (45.2) and an excellent sensing response/recovery reproducibility. In order to investigate the sensing mechanism of Janus structure, ZnO NFs and SnO 2 NFs were synthesized and used as controlled experiment. The results indicated that the heterostructures in Janus NFs is the key factor for the enhanced TEA sensing performances. The electrons flowed in the ZnO-SnO 2 Janus structure leading to the variation of ionic oxygen species and electron depletion layer. These phenomena improved the reaction of TEA gas molecules with ionic oxygen species so that the TEA sensing performances were enhanced. Based on the Janus structures, a satisfactory gas sensor for detecting TEA gas were developed. Significantly, this work investigated the sensing mechanism of Janus structures and provided an efficient strategy for the gas sensing materials.
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