Regenerative Therapy
·
2024
·
IF 3.4
Xun Xu,Jun Wang,Tian-Ci Sun,Qing Li,Ren-De Ning
Hydrogel has emerged as a promising wound dressing material, and in situ forming hydrogel has emerged as a promising wound dressing recently. But most in situ forming hydrogel are normally unstable. Herein, we report an in-situ forming hydrogel synthesized from poly(Nisopropylacrylamide166- co - n -butyl acrylate9)-poly(ethyleneglycol)-poly(N-isopropylacrylamide166- co - n -butyl acrylate9) copolymer (P(NIPAM166- co -nBA9)-PEG-P(NIPAM166-conBA9), denoted as PEP) and zinc oxide nano-particle(ZnO nano-particle) in response to skin temperature. This thermoresponsive hydrogel exhibits sol-gel reversibility at high temperatures, which is closed to the temperature of human skin. To investigate its healing effects, we used the Hydrogel dressing® in an SD rat model. The biocompatibility and antibacterial ability against methicillin-resistant Staphylococcus aureus(MRSA) of this PEP-ZnO hydrogel wound dressing are confirmed in vitro and in vivo, which could transparently promote the healing of a MRSA-infected frostbitten skin Injury. Materials and methods Thirty rats were randomly divided into two groups. The treatment group received hydrogel and transparent film dressing 30 min to 1 h post-burn, while the control group received only cotton dressing. The wound area was measured, and the wound closure rate was calculated on days 3, 7, and 14 post-surgery. Tissue samples were collected from each rat on these days and stored at −80 °C for histological analysis using H&E, Masson and immunohistochemical staining. This analysis assessed factors such as granulation tissue length, re-epithelialization, re-angiogenesis, collagen deposition, inflammatory cell infiltration, and collagen production. Clinical and histological assessments at 14 days showed more rapid healing in the hydrogel dressing group compared to the control group. Conclusion Our results indicate that the design of our hydrogel for cooling injury wounds effectively improves healing and mitigates the damage from low temperatures.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Hang-bo Zheng,Di Wu,Yuan-li Wang,Xiao-pan Liu,Peng-zhao Gao,Wei Liu,Jin Wen,Evgeny V. Rebrov
A new approach was proposed for the preparation of metal–organic framework/metal oxide composites in one step using only metal salts. Here, crystalline rhombohedral dodecahedron ZIF-8, hollow ZnO microsphere , and ZIF-8/ZnO composites were obtained in different one-pot solvothermal processes where the growth toward individual ZIF-8 and ZnO phases and toward ZIF-8/ZnO composites was controlled by adjusting the ratio of metal salts to 2-methylimidazole. Subsequently, a series of derived (C and/or N)-doped ZnO nanoparticles was obtained by a two-step calcination process. The absorption kinetics and photocatalytic activity in methyl orange degradation under visible light were investigated. ZIF-8-derived ZnO could maintain their original morphology and displayed excellent photocatalytic activity 10 times higher than that of the original ZIF-8.
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 82
·78257-78263
·
IF 3.289
Jiabao Cui,Jingjing Jiang,Linqi Shi,Fei Zhao,Dejun Wang,Yanhong Lin,Tengfeng Xie
Ni-Doped ZnO nanofibers have been synthesized by a simple, facile electrospinning method. The structure and morphology of the products were characterized by SEM, HRTEM and XRD analysis. X-ray photoelectron spectroscopy (XPS) confirmed that Ni2+ ions exist in the ZnO nanofiber structures. The photoelectric gas-sensing tests reveal that the response was significantly enhanced by Ni doping, and the 0.7% molar ratio Ni-doped sample (NZ0.7) exhibits the highest response of 532.7% to 100 ppm HCHO at room temperature. Photoluminescence (PL) measurements show that there are more donors in Ni-doped ZnO nanofibers by the introduction of Ni2+ ions. Furthermore, the surface photovoltage (SPV) and transient photovoltage (TPV) tests indicated that Ni doping can effectively enhance the donor density, which could facilitate charge separation and transport in the semiconductor, and promote photogenerated holes to move toward the irradiated surface of the samples. These results contribute to the photocatalytic oxidation of HCHO so as to achieve higher gas-sensing properties for Ni-doped ZnO nanofibers.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shuai-Yu Wu,Kai-Zhen Yuan,Xiao-Feng Xu,Zhao-Jian Li,Zhen Zhang,Peng Wang,Yun-Ze Long,Hong-Di Zhang
Vacancy engineering is a highly efficient approach to enhancing photocatalytic activity. This research presents an innovative development of ZnO/NiO coaxial heterojunction nanofibers (ZN 1/1 ) and ZnO/NiO coaxial heterojunction nanofibers with engineered oxygen vacancies (OVs-ZN 1/1 ) via electrospinning and annealing. Detailed characterization of the nanofiber microstructure was conducted using scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The OVs-ZN 1/1 nanofibers demonstrated outstanding and unprecedented photocatalytic performance, achieving a 99 % degradation rate of Congo red dye (CR) under simulated solar light in just 45 min, with a good degradation coefficient of 0.091 min −1 . Remarkably, the nanofibers’ photocatalytic activity remained a high level even after five cycles. Moreover, the photocatalytic H 2 O 2 yield of OVs-ZN 1/1 increased 20 times as much as that of ZN 1/1 . Experiments and mechanism analysis indicate that oxygen vacancy, as the electron trapping site of photoexcitation, accelerates the charge separation and transfer at the interface, thus promoting the adsorption and activation of target molecules. This study highlights the novel and superior performance of photochemical catalysts achieved through the strategic incorporation of oxygen vacancies and heterojunctions.
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DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2023
·Vol. 12
·期 7
·076009
·
IF 2.2
Chengsha Huang,Jin Li
The low-temperature hydrothermal and water bath methods are used to manufacture CuS@ZnO/CdS catalyst. The Rhodamine B degradation rate constant of CuS@ZnO/CdS is around 1.53 × 10−2 min−1, which is 3.9 times greater than that of ZnO. The coupling of CdS and loading of CuS onto ZnO surfaces were evaluated using XRD, SEM, TEM, and XPS. SEM demonstrated that 5 mg of CdS was the most effective in controlling the shape of ZnO nanoflakes. Ultraviolet-visible absorption (UV–vis) and Photoluminescence (PL) spectra reveal that CdS and CuS decreased the bandgap of ZnO and boosted its ability to absorb visible light. Transient photocurrent response (TPR) and electrochemical impedance spectra (EIS) display that CdS and CuS facilitate the quick separation of photoexcited carriers in ZnO. Notably, the optimal weight ratio of CuS was determined to be 15%, since excessive amounts of CuS would operate as recombination centers and cover active sites. Additionally, the dual Z-scheme carriers movement mechanism was proposed using sacrificed agent experiments, and TOC analyzed the mineralization rate of RhB after degradation. In this study, CuS@ZnO/CdS photocatalyst degraded RhB nearly 99% in 80 min, which is superior to the earlier photocatalysts. Therefore, this article holds great significance in the practical application of metal chalcogenide-modified ZnO-based photocatalysts with superior visible light-induced degradation performance in environmental purification.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Zui Tao,Hewei Si,Xidong Zhang,Jianjun Liao,Shiwei Lin
A highly sensitive and selective sensor is urgently needed in many practical H 2 O 2 detection, such as water quality monitoring, quality control of food products, and so on. However, the traditional three electrode system limits its further development in recent years due to its difficulty in miniaturization and integration. To effectively improve its sensitivity and selectivity, highly-ordered TiO 2 nanotube arrays (TNTAs) are modified with Pt nanoparticles and Prussian blue (PB) nanotubes and creatively combines with thin-film transistor (TFT) based on ZnO to prepare an electrochemical sensor . The sensor uses PBNCs as recognition units for the specific detection of H 2 O 2, and the generated electrical signal is amplified by TFT. Thus, a highly sensitive and selective H 2 O 2 sensor is achieved. The detection limit of the sensor is as low as 5.19 nM, which is three orders of magnitude lower than the conventional electrochemical detection methods using the same electrode. The sensor also possesses wider linear detection range of 0.1–50 μM and 50 μM–5 mM comparable to that of other reported H 2 O 2 sensors. Besides, the sensor has good selectivity for H 2 O 2 in the presence of common interferences such as ascorbic acid , uric acid , glucose, and dopamine. Furthermore, the device presents good reproducibility and exhibits good long-term stability over 27 days of continuous measurement. This study offers important insights for the rational design of sensors with high sensitivity and selectivity.
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DOI
高影响因子
MATERIALS TECHNOLOGY
·
2020
·
IF 1.738
Yusong Pan,Minyuan Yin,Hongjun Fang,Linfeng Xu,Haixian Yan,Chengling Pan
A novel ternary ZnO/CdS/GO heterostructure with boosting photocatalytic performance and stability was prepared by a simple hydrothermal method. The morphology, crystal structure, chemical composition and optical properties of the composite were thoroughly investigated. Results show that the obtained ZnO/2CdS/10GO composite exhibits the optimal activity towards RhB removal under sunlight irradiation, which is higher than that of pristine ZnO and CdS. The enhanced photocatalytic performance of the composite is attributed to the close heterostructure and excellent conductivity of GO. Besides, the radical trapping experiments revealed that superoxide radical (•O2−) and holes (h+) were the vital active species in the photocatalytic process. Meanwhile, the corresponding photocatalytic mechanism was also investigated. In all, this work supplies a facile route to design highly efficient and stable photocatalysts for water purification.
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DOI
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 10
·2200446
·
IF 4.149
Jianding Li,Yun Zheng,Xiaozhi Bao,Liqing He,Haiyan Zhang,Yuxin Tang,Huaiyu Shao
ZnO with high theoretical capacity, low cost, natural abundance, and environmentally friendliness is regarded as a promising anode material for lithium-ion batteries (LIBs). Unfortunately, it suffers from low conductivity and huge volume expansion during charge/discharge, which finally leads to rapid capacity degradation and poor rate capability. To overcome these issues, the honeycombed ZnO@N-doped carbon (HC-ZnO@NC) composite with improved performances is prepared in this work. The composite could be easily prepared as an anode for LIBs and sodium-ion batteries (SIBs) by cross-linking and subsequent calcining at a target temperature. When used as an anode for LIBs, it could possess a reversible capacity of 687 mAh g −1 after 500 cycles at a rate of 0.5C. At a higher rate of 2C, 388 mAh g −1 is observed after 500 cycles. Additionally, HC-ZnO@NC also obtains a capacity of 166 mAh g −1 after 200 cycles at 0.5C for SIBs. When the rate reaches 1C, it maintains a capacity of 126 mAh g −1 after 1000 cycles. The outstanding electrochemical metal ion storage properties might be ascribed to the synergistic effect of honeycombed carbon architecture and micro ZnO nanocrystals.
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DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2018
·
IF 2.399
Zhi Zhang,Ying Chen,Jiansheng Guo
With the development of wearable and flexible electronics, PENGs based on ZnO nanorod arrays patterned-textile have aroused great interests. Nevertheless, the currently used hydrothermal method to fabricate ZnO nanorods and the performance of ZnO strucures prepared at present still need to be further improved. Hence, ZnO nanorods patterned textile based-PENG (ZnO-T-PENG) has been developed in this paper, which consists of vertically arranged ZnO nanorod arrays sandwiched between two symmetrically layers of silver (Ag) coated-fabrics. A facile screen printing method was utilized to plate Ag paste on the fabric surface as electrodes. In particular, a novel hydrothermal method which requires single precursor solution was employed to synthesize ZnO nanorod arrays. Results reveal ZnO nanorod arrays which are uniformly, densely, and vertically arranged on the surface of Ag coated-fabric, have been synthesized successfully. Atomic force microscope (AFM) analysis proves the ZnO nanorods possess excellent coupled piezoelectric and semiconducting properties. This PENG can harvest the energy from human bodies with output voltages of 4 V, 0.8 V and output currents of 20 nA, 5 nA for palm clapping and finger bending respectively. This kind of ZnO-T-PENG exhibits superior flexibility and wearability with the capability of powering for micro electronic devices, which can promote the development of wearable electronics.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 33
·25446-25462
·
IF 2.779
Wang Bo-wen,Lu Jia-zheng,Gao Peng-zhao,Fu Zhi-yao,Jiang Zheng-long
In this work, the effect of Bi 2 O 3 content on the microstructure, mechanical, thermal, and electrical properties of ZnO varistors was investigated, and the high impulse current withstand properties and failure mechanism of ZnO varistors was discussed in detail. When content of Bi 2 O 3 equaled to 0.75 mol%, the varistors possessed excellent mechanical, thermal, and electrical properties, where the value of σ f and E f were 130.77 MPa and 69.60 GPa, K T and λ T were 6.504 W·(m·°C) −1 and 7.00 × 10 –6 °C −1 , E 1mA , α, J L , and K were 272.13 V·mm –1 , 55.96, 1.55 μA·cm –2 , and 1.74, respectively, being due to the highest density and finest uniform grain size distribution. Finite Element Analysis (FEA) showed that the thermal stress decreased first and then increased with the increase of Bi 2 O 3 content, where E f and λ T played a more important role than K T . And the loaded impulse current I p can generate Joule heat to improve the temperature of ZnO varistors, thereby increasing the thermal stress and promoting the migration of dopants ions from ZnO to the Bi 2 O 3 crystal lattice. Hence, J L increased and U 1mA reduced, which further increased the thermal effect generated by I p . When the value of I p equaled to 100 kA, high temperature produced a loose microstructure and broken grains originated from the strong thermal stress. Meanwhile, the enhanced migration increased J L (3.77 μA·cm −2 ) and decreased U 1mA (4.93 kV), resulting in a critical value of Δ U 1 mA (9.88%). A further increase in I p led to the failure of ZnO varistors.
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Tiandi Pan,Jian Liu,Nanping Deng,Zongjie Li,Liang Wang,Zhaopeng Xia,Jie Fan,Yong Liu
The anti-wetting and anti-scaling abilities of membrane are two critical properties for the membrane distillation. In this work, a superhydrophobic hybrid composite nanofiber membrane with the construction of hydrophobic ZnO nanowires on PVDF nanofiber membrane (P–ZnO@PVDF) based on hydrothermal method and chemical vapor deposition (CVD) was presented. Imitating the growth of grass was employed to enhance the adhesion between ZnO nanowires and PVDF nanofiber membrane. The P–ZnO@PVDF membrane exhibited high porosity, narrow pore size distribution , superhydrophobicity, anti-wetting and anti-scaling, owing to the slip and Cassie-Baxter state caused by introduction of hydrophobic ZnO nanowires. Moreover, the membrane with robust durability presented the salt rejection of 99.9% and a stable permeation flux of 15.7 L m −2 h −1 for simulated seawater at the feed temperature of 60 °C and the distillate temperature of 20 °C after 60 h operation. The hybrid composite nanofiber membrane is to be a potential candidate for long-term operation of membrane distillation.
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DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 21
·12134-12145
·
IF 3.049
Wenyi Wu,Fengjuan Miao,Bairui Tao,Yu Zang,Lei Zhu,Cuiping Shi,Paul K. Chu
A self-powered nonenzymatic glucose sensor electrode boasts the advantages of both a glucose sensor and fuel cell. Herein, an electrode composed of ZnO–graphene hybrid materials on nickel foam (NF) is prepared by electrodeposition of Pd NPs. The electrode is characterized systematically and the dependence of electrocatalytic oxidation of glucose on the concentrations of KOH and glucose, temperature, and potential limit in the anodic direction is investigated. The Pd/NF-ZnO–G electrode shows high catalytic activity, sensitivity, stability, and selectivity in glucose detection, as exemplified by an electrocatalytic glucose oxidation current of 222.2 mA cm−2 under alkaline conditions, high linearity in the glucose concentration range from 5 μM to 6 mM (R2 = 0.98), and high sensitivity of 129.44 μA mM−1−1 cm−2. The Pd/NF-ZnO–G electrode which exhibits superior electrocatalytic activity under alkaline conditions has large potential in nonenzymatic glucose sensing and direct glucose fuel cells and is suitable for miniaturized self-powered nonenzymatic glucose sensing.
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DOI
高影响因子
危险品化学品经营许可证（带存储）