COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Chao Hou,Md All Amin Newton,Binjie Xin,Tingxiao Li
Wound infection caused by excessive exudate leads to overhydration of wounds and prevents wound healing. Thus, there is a need for a wound dressing to be developed that can unidirectionally export excess biological fluid while inhibiting bacterial infection. Herein, a nanofibrous bilayer membrane with a unidirectional water transport function was fabricated by electrospinning as a novel wound dressing, which can export excess biological fluid efficiently and further inhibit bacterial infection. The inner layer of the bilayer nanofiber membrane is polylactic acid (PLA)-zinc oxide (ZnO) nanofibers, which are hydrophobic and antibacterial. The outer layer is polyacrylonitrile (PAN)-sodium polyacrylate (SPA) nanofibers, which are hydrophilic and liquid-absorbent. The bilayer nanofibrous membrane's morphology, mechanics, thermal stability, wettability , water absorption, gas permeability, and unidirectional water transport ability were characterized and evaluated. The study showed that the nanofibrous bilayer membrane exhibited excellent physicochemical properties and biological performance, and its mechanical properties can reach 4.6 MPa. In addition, when the thickness of the hydrophobic layer is 3 µm and the thickness of the hydrophilic layer is 44 µm, the double-layer fiber membrane can effectively export the excess biological fluid in 5.09 s and prevent the wound from wetting again. The nanofibrous bilayer membrane with excellent water absorption, air permeability , thermal stability, and mechanical strength provides a feasible solution for chronic wound healing.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Jie Cui,Lin Ye,Xiaoxi Chen,Jianing Li,Bian Yang,Man Yang,Qing Yang,Daqin Yun,Shaodong Sun
Exploring novel materials with both high adsorption capacity and photocatalytic properties is urgent in environmental remediation. In this work, a Z-scheme ZnO/Cu 2 O heterostructure with a large surface area of 45.42 m 2 /g was constructed by using the liquid phase reduction method. Compared to pure ZnO and pure Cu 2 O, the as-synthesized ZnO/Cu 2 O nanocomposites exhibited excellent capacity of adsorption and photodegradation for tetracycline (TC), which was degraded 95.3% of TC within 120 min under simultaneous adsorption and photocatalytic processes. Theory and experimental analysis manifested that the excellent adsorption-photocatalytic activity can be attributed to the large BET specific surface area, the efficient charge carrier separation and the high redox capability. The results of this study identified the potential advantages of ZnO/Cu 2 O composites for removing antibiotics to purify water resources and protect the environment.
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高影响因子
ACS Omega
·
2023
·
IF 4.1
Jie Dong,Laixi Zhang,Wei Li,Xin Hu,Anyi Chen,Chaorui Li
In this study, a facile and cost-effective hydrothermal synthesis method was used to synthesize zinc oxide nanoflowers modified by reduced graphene oxide, and subsequently, trimetallic AuPtRu nanoparticles(AuPtRuNPs) were supported via the reduction method for high-sensitivity colorimetric detection of H2O2 in weakly acidic solutions. Compared to monometallic and bimetallic nanoparticles, trimetallic nanoparticles exhibit significant synergistic effects and enhanced catalytic activity. After providing a three-dimensional structure with multiple pores by zinc oxide and enhancing electron transfer ability by reduced graphene, the trimetallic nanocomposites (AuPtRu/ZnO-rGO) exhibited excellent peroxidase-mimicking activity, which can effectively catalyze 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue oxidation product (oxTMB) in the presence of H2O2. Compared to horseradish peroxidase (HRP), AuPtRu/ZnO-rGO demonstrated significantly enhanced catalytic velocity (Vmax = 6.16 × 10–8 M/s) and affinity (Km = 0.02) for H2O2. The study of the catalytic mechanism showed that trimetallic Au, Pt, and Ru could effectively catalyze H2O2 to produce hydroxyl radicals (•OH) to accelerate the oxidation of TMB and enhance the peroxidase-mimicking activity of the AuPtRu/ZnO-rGO nanocomposites. The results showed that the as-synthesized hydrangea-like AuPtRu/ZnO-rGO nanocomposites showed enhanced peroxidase-mimicking activity. It could be used for the colorimetric detection of H2O2 in the range 5–1000 μM with a LOD of 3.0 μM (S/N = 3), and the recoveries are 93.0–101.7%. In addition, the AuPtRu/ZnO-rGO nanocomposites have good applicability for sensitive colorimetric determination of H2O2 in milk, and it has broad application prospects as a multifunctional sensing platform in the food processing industry.
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PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Meixian Li,Jun Liu,Tao Zhang,Nina Liang,Lijuan Yan,Fengzhen Lv,Wenjie Kong,Fuchi Liu,Lizhen Long
The construction of semiconductor heterojunctions is an effective approach to enhance the performance of optoelectronic devices. In this study, graphene-quantum-dots (GQDs) were grown on ZnO nanorods arrays in - situ to form intimate heterojunctions. The fabricated photoelectrochemical (PEC) photodetector based on ZnO/GQDs heterojunctions displayed good self-powering characteristics, with an on/off current ratio of approximately 21 at zero bias, which was almost seven-fold higher than that of the bare ZnO device. The responsivity and detectivity of the ZnO/GQDs-based photodetector were also enhanced compared with those of bare ZnO devices. A unique type-II band alignment was established at the ZnO/GQDs heterojunction interface, which facilitated the carrier transfer. Moreover, the ZnO/GQDs heterojunction reduced the passivation of the surface states, resulting in large energy-band bending and an internal electric field at the semiconductor/electrolyte interface, which provided a powerful driving force for the separation and transport of photogenerated carriers. These combined effects enhance the performance of the photodetector, indicating that this approach can be used to fabricate high-performance PEC optoelectronic devices.
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高影响因子
ANALYTICAL BIOCHEMISTRY
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2023
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IF 2.9
Zhimin Li,Xiong Lu,Guiqiao Liu,Libin Yang,Faming Gao
Core-shell ZIF-8@ZIF-67 was synthesized by growing a cobalt-based ZIF-67 on a ZIF-8 seed particle. Herein, through selective etching of the ZIF-8@ZIF-67 core and subsequent direct carbonization , core-shell hollow ZnO@CoO nitrogen-doped nanoporous carbon (HZnO@CoO-NPC) nanocomposites were prepared. HZnO@CoO–NPCs possessed a high nitrogen content, large surface area, high degree of graphitization and excellent electrical conductivity , all of which were attributed to successfully integrating the unique advantages of ZIF-8 and ZIF-67. HZnO@CoO–NPCs were used to assemble acetylcholinesterase (AChE) biosensors for organophosphorus pesticides (OPs) detection. The low detection limit of 2.74 × 10 −13 M for chlorpyrifos and 7.6 × 10 −15 M for parathion-methyl demonstrated the superior sensing performance. The results showed that the electrochemical biosensor constructed by HZnO@CoO-NPC provided a sensitive and efficient electrochemical strategy for OPs detection.
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PubMed
高影响因子
VACUUM
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2023
·
IF 4
Dayu Li,Longfei Li,Wenchao Zhang,Chao Zhang
Construction of heterojunction can inhibit the recombination of electron holes and improve the sunlight absorption, thus improving the photocatalytic performance of semiconductors. In this research, Bi@BiOBr/ZnO coatings are in-situ grown on nickel foam by a facile hydrothermal method . Before coating deposition the nickel foam surface is modified under different radiofrequency plasma atmospheres (O2, H2/Ar, Ar, CH4) in pulsed mode. The plasma treating effects on the coating morphology, crystallization, chemical and photocatalytic properties are investigated. It is found that various morphologies of Bi@BiOBr/ZnO coatings have been grown on the plasma-treated nickel foam surface by using the different plasma atmospheres. The polycrystalline structure including Bi, BiOBr and ZnO phases has been identified for the different coatings. The photocatalytic mechanism includes the SPR effect of metal Bi which can inhibit the recombination of electron holes and heterojunction structure of BiOBr–ZnO has good effects on the photodegradation performance of MO solution under visible light .
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Xiangbo Feng,Lvwei Sun,Wei Wang,Yuzhen Zhao,Jian-Wen Shi
Photoelectrochemical (PEC) water splitting provides a promising strategy for the production of clean hydrogen fuel. Herein, a new CdS@ZnO core–shell nanorod arrays (NRAs) is successfully constructed by atomic layer deposition (ALD) for H 2 evolution from PEC water splitting. The CdS@ZnO 200 obtained after 200 ALD cycles presents a significantly enhanced PEC H 2 evolution rate of 21.64 μmol·h −1 ·cm −2 , which is about 9.4 times of pristine CdS NRAs (2.31 μmol·h −1 ·cm −2 ). The reasons for the improved PEC H 2 evolution performance can be ascribed to several aspects: firstly, the Z-scheme charge transfer mechanism formed between CdS core and ZnO shell promotes the effective spatial separation of photo-induced electrons and holes; secondly, the close contact between the two semiconductors resulted from ALD process helps to reduce the transfer resistance of charge carriers. In addition, the CdS core is tightly wrapped by ZnO shell, which helps to prevent the photo-corrosion of CdS core. This work provides a new type of photoanode material suitable for PEC H 2 evolution from water splitting, and provides an efficient anti-corrosion method for the use of photocorrosive semiconductor materials.
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高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Fang Wang,Fengna Shi,Jingfang Li,Naipin Chen,Cheng Chen,Ziqi Xu,Jiajun Wang
It is extremely important to simultaneously detection different biomarkers in various biological systems. Hereby, we have developed an original flexible nonenzymatic glucose and uric acid sensor using carbon cloth loaded with copper microspheres (Cu MSs) and ZnO nanoparticles decorated single-walled carbon nanotubes (Cu MSs/ZnO@CNTs/CC). Firstly, ZnO@CNTs was synthesized via sol–gel method, and then Cu MSs were uniformly electrodeposited on ZnO@CNTs/CC substrate rapidly. Morphological and compositional characteristics were examined to confirm the successful decoration of Cu microspheres and ZnO nanoparticles. Importantly, the nanocomposite electrode displayed remarkable electrocatalytic activity for glucose and UA, including wide linear detection range, low detection limit, outstanding sensitivity, respectively. Moreover, the nanostructure biosensor exhibited fast response time (0.1 s) and favorable long-term stability, which are attributed to synergistic catalytic effects: (a) the large specific surface area of CNTs offered abundant sites for the decoration of ZnO nanoparticles, and (b) the rough nanosheets assembled Cu microspheres could expose plentiful active sites. Finally, in practical serum samples, the sensor also exhibits considerably favorable precision and accuracy. As such, the novel flexible Cu MSs/ZnO@CNTs/CC sensor developed with economical and efficient preparation method provided a new easy and sensitive platform for glucose and UA determination in real application.
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高影响因子
Polymers
·
2023
·Vol. 15
·期 9
·2215
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IF 5
Zhe Liu,Xi Yu,Zhenchao Zhou,Jinyu Zhou,Xinyi Shuai,Zejun Lin,Hong Chen
The worldwide prevalence of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) have become one of the most urgent issues for public health. Thus, it is critical to explore more sustainable methods with less toxicity for the long-term removal of both ARB and ARGs. In this study, we fabricated a novel material by encapsulating zinc oxide (ZnO) nanoflowers and activated carbon (AC) in an alginate biopolymer. When the dosage of ZnO was 1.0 g (≈2 g/L), the composite beads exhibited higher removal efficiency and a slight release of Zn2+in water treatment. Fixed bed column experiments demonstrated that ZnO/AC alginate beads had excellent removal capacities. When the flow rate was 1 mL/min, and the initial concentration was 107CFU/mL, the removal efficiency of ARB was 5.69-log, and the absolute abundance of ARGs was decreased by 2.44–2.74-log. Moreover, the mechanism demonstrated that ZnO significantly caused cell lysis, cytoplasmic leakage, and the increase of reactive oxygen species induced subsequent oxidative stress state. These findings suggested that ZnO/AC alginate beads can be a promising material for removing ARB and ARGs from wastewater with eco-friendly and sustainable properties.Keywords:antibiotic resistance;calcium alginate;zinc oxide/activated carbon;fixed bed;reactive oxygen species
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Hongyu Niu,Xing-Bao Wang,Jingjie Luo,Jiaxin Liu,Chuang Li,Wen-Ying Li,Changhai Liang
Desulfurization plays a critical role in refining crude oil to produce fuel and the manufacture of fine chemicals. However, its low efficiency becomes a great challenge for the present desulfurization if only the C-S cleavage is considered a promising approach to reducing hydrogen consumption under atmospheric pressure. Accordingly, we investigate the critical factors necessary to achieve high C-S cleavage of dibenzothiophenes under mild conditions of 0.1 MPa and H 2 /oil = 100. The mechanism of reactive adsorption desulfurization of dibenzothiophenes with or without steric hindrance at atmospheric pressure on Pt/ZnO is proposed by studying the adsorption model of active metal sites, the Pt efficiency in C-S cleavage influenced by the steric hindrance and the structural evolution of Pt active centers in the presence of sulfur adsorption/deposition. Based on both experimental and DFT results, we report C-S cleavage of dibenzothiophenes with (TOF = 15 h −1 ) or without steric hindrance (TOF = 128 h −1 ) that can be highly efficiently fractured (99.9%) by the interface between PtS x and ZnO . This work has great practical significance for developing atmospheric industrial adsorbents for ultra-deep reactive adsorption desulfurization.
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高影响因子
FUEL PROCESSING TECHNOLOGY
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2023
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IF 7.5
Yi Yuan,Lijia Huang,Tian C. Zhang,Yuan Wang,Shaojun Yuan
Metal oxide loaded carbon-based materials have attracted extensive attention as promising desulfurizers to solve the problem of H 2 S emission at room temperature . However, low desulfurization capacity, difficult regeneration and high economic cost are the main problems of metal oxide loaded carbon-based desulfurizers, which limit their industrial application. Herein, a novel and low-cost CaCO 3 -ZnO loaded biochar (RCZ) was synthesized by one-step pyrolysis of scrap rice and metal salts for highly efficient H 2 S removal at room-temperature. The optimized RCZ-1-1-1-800 sample showed an excellent H 2 S removal ability of 834.48 mg/g at the reaction temperature of 25 °C, oxygen content of 10%, and relative humidity of 70% as compared to 29.31 mg/g achieved by the inactivated biochar (prepared without activator). Such an RCZ-1-1-1-800 desulfurizer also delivered a high H 2 S removal ability under different desulfurization conditions. The associated desulfurization mechanism of RCZ was the coupling of reactive adsorption and catalytic oxidation with sulfur being the main desulfurization product. Moreover, the as-fabricated RCZ also exhibited a high reusability , retaining about 95% of the initial H 2 S removal capacity after five adsorption/regeneration cycles. This work provides a promising idea for the preparation of low-cost and high-capacity metal oxide- and carbonate-loaded carbon-based desulfurizers.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Gang Chen,Yun Guo,Xuechun Yang,Guohao Li,Zhanpeng Yang,Jingyu Huang,Lingli Cheng,Zheng Jiao
Herein, in order to efficiently enhance the sensing properties based on zinc oxide (ZnO) sensors toward n-butanol, a series of MOF ZIF-8 (zeolite imidazolate framework-8)-derived Tourmaline@ZnO core–shell nanostructures were prepared with a facile solution mixing method and an after-treatment calcination process, and the gas sensing performances were systematically characterized. The results exhibited that the paucity of tourmaline introduction could significantly improve the gas sensitivity for n-butanol, simultaneously increasing the gas selectivity and reducing the response–recovery times. In particular, the sensor based on 5 wt % Tourmaline@ZnO nanocomposites achieved a superior response value, reaching up to 294.4 for 100 ppm n-butanol at 320 °C. Through the integrated testing and analyses of BET, XPS, PL, and UV, it has been confirmed that the introduction of tourmaline can not only enlarge the specific surface area and enrich the surface defects of the ZnO matrix, but its unique spontaneous polarization electric field can also reduce the recombination rate of electron–hole pair efficiency, promoting the efficiency of electron transport and accelerating the gas sensing process ultimately. The enhancement mechanism of the nanostructured Tourmaline@ZnO core–shell gas sensing material was also elucidated from the perspective of the energy band theory at length.
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危险品化学品经营许可证（带存储）