INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Nannan Li,Dongyang Jiang,Zeguang Zhou,Yanyue Lu,Lei-Zhong,Wing Cheung Law,Chak Yin Tang
Active packaging, which can monitor food freshness and extend the shelf life, has gained significant attention in recent years. This study aims to develop a novel carboxymethyl cellulose (CMC)/starch/anthocyanins/ZnO active films with enhanced properties and specific functionalities. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) revealed that the addition of anthocyanins and nano-ZnO particles (ZnO-NPs) led to heterogeneous microstructures and a slight decrease in the crystallinity. Fourier transform infrared spectroscopy (FTIR) indicated that there were no chemical interactions among film components. Active films containing ZnO-NPs exhibited improved ductility, as well as enhanced light barrier and water resistance properties. Notably, a shift from hydrophilic to hydrophobic behavior of the films was observed with high ZnO-NP content, as evidenced by a significant increase in the water contact angle (from 63.44° to 114.22°). Furthermore, the presence of only 1 % ZnO-NPs resulted in efficient inhibition of Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) growth. Moreover, active films containing both anthocyanins and ZnO-NPs were highly sensitive to pH changes in buffer solutions (pH 2–11). Based on the results, a recommended film formulation for future active packaging applications is a 80:20 CMC/starch blend with 3 % ZnO-NPs and 0.1 g anthocyanins.
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高影响因子
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
·
2020
·Vol. 108
·期 11
·2190-2205
·
IF 3.525
Yulu Yang,Bailong Tao,Yi Gong,Rui Chen,Weihu Yang,Chuanchuan Lin,Maowen Chen,Lu Qin,Yile Jia,Kaiyong Cai
After bone tumor resection, the large bony deficits are commonly reconstructed with Ti-based metallic endoprosthesis, which provide immediate stable fixation and allow early ambulation and weight bearing. However, when used in osteosarcoma resection, Ti implant-relative infection and tumor recurrence were recognized as the two critical factors for implantation failure. Hence, in this work, a novel zinc oxide nanoparticle decorating with naringin was prepared and immobilized onto Ti substrate. The drugs delivery profiles proved that in the bacterial infection and Warburg effect of osteosarcoma-induced acidic condition, naringin and Zn 2+ can be released easily from the functional Ti substrate. The anti-osteosarcoma and antibacterial assay showed the delivered naringin and Zn 2+ can induce a remarkable increase of oxidative stress in bacteria ( Escherichia coli and Staphylococcus aureus ) and osteosarcoma (Saos-2 cells) by producing reactive oxygen species (ROS). Accumulation of ROS results in damage of bacterial biofilm and bacterial membrane, leading to the leakage of bacterial RNA and DNA. Meanwhile, the increase of ROS induces osteosarcoma cell apoptosis by activating ROS/extracellular signal-regulated kinase signaling pathway. Furthermore, in vitro cellular experiments, including cell viability, alkaline phosphatase activity, collagen secretion, extracellular matrix mineralization level, indicated that the functional Ti substrate exhibited great potential for osteoblasts proliferation and differentiation. Hence, this study provides a simple and promising strategy of developing multifunctional Ti-based implants for the reconstruction of large bony after osteosarcoma resection.
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高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Xin Yuan,Rongcao Yu,Yilin Du,Bing Lei
To evaluate the barrier properties of the composite coatings reinforced by PDA (polydopamine)-BN@ZnO nano-pigments, the correlation between electrolyte transport characteristics and different nano-pigment contents in the composite coatings was studied. The electrochemical response of composite coatings was mainly controlled by non-Faraday process. A two-layer model based on Young's impedance was established to fit the non-Faraday process of the composite coatings from the 6th day of immersion. The coating resistivity varying with electrolyte transport could be used as a key parameter to describe the barrier properties of the coatings. At the same time, the explanation that different contents of nano-pigments enhance or weaken the barrier performance of composite coatings was given, that is, the nanoconfinement effect of the polymer under the effect of nano-pigments.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tiandi Pan,Zhibo Huang,Jianquan Zhang,Ning Tang,Ermiao Wu,Peijian Du,Youna Liu,Xiaofei Liu
Nanofiber membranes are widely used to separate water-in-oil emulsions. However, the membrane fouling from surfactant absorption reduces the permeation flux, while pressure-driven induces nanofiber slippage due to weak inter-fiber adhesion, leading to pore enlargement and a reduction in separation efficiency. To address these problems, this study developed gradient structure nanofiber composite membrane by in-situ growth ZnO nanowires on PVDF nanofibers through hydrothermal synthesis and chemical vapor deposition (CVD). The introduction of ZnO nanowires increases the surface roughness, endowing the membrane with superhydrophobicity, thus excellent the anti-fouling properties. Additionally, by virtue of the gradient growth ZnO nanowires, the pore size of membrane showed a trend from small to large. The top layer with small pore could efficiently collect micro-sized water droplets from the emulsions. The bottom PVDF nanofibers possessed large pore and high porosity, ensuring high permeation flux. As a result, the optimized membrane achieved a separation efficiency of 99.2 %, permeation flux of up to 7554 L m −2 h −1 for water-in-xylene emulsion under the driving pressure of 20 kPa. Besides, the obtained membrane exhibited favorable reusability with efficiency 91.1 % for water-in-diesel emulsion after 10 cycles. The work provides a way to construct gradient structured membrane for high efficiency and rapid water removal from oil products.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Shuang Liang,Guozhe Sui,Jinlong Li,Dongxuan Guo,Ze Luo,Rongping Xu,Hong Yao,Chao Wang,Shijie Chen
This study presents a novel approach for synthesizing C–ZnO/CdS graded nanorods derived from metal–organic frameworks (MOFs) that can be applied as a catalyst for photocatalytic hydrogen evolution from pure water. Porous C-doped ZnO was prepared by a self-template method using imidazole-like metal–organic backbone (ZIF-L) as a precursor through a two-step calcination method. CdS nanoparticles were deposited on ZIF-L surface by chemical deposition . The two-step calcination method introduced elemental C, and the unique architecture of ZIF-L played an essential role in forming the hierarchical structure of the porous ZnO nanorods. Compared with other ZnO/CdS catalysts, the C-doped ZnO/CdS graded nanorods exhibited remarkable photocatalytic activity for hydrogen production . The highest hydrogen production rate of 20.25 mmol g −1 h −1 with an apparent quantum yield (AQY) of 24.7% at 365 nm obtained over C–ZnO/CdS with Pt as co-catalyst, which was 24.4 and 65.3 times higher than that over CdS (0.83 mmol g −1 h −1 ) and ZnO (0.31 mmol g −1 h −1 ), respectively. This outcome was attributed to (i) the formation of Z-scheme heterojunction that significantly promoted the separation and migration of photogenerated electron–hole pairs; (ii) C doping that reduced the bandgap of ZnO and broadened its spectral response range; and (iii) the ordered arrangement of porous nanorods that effectively reduced the recombination rate of the electron–hole pairs.
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 27
·275712
·
IF 3.953
Yangchun Feng,Wangyang Yang,Yufang Li,Honglie Shen
In recent years, high-performance acetone gas sensors have attracted great attention for their potential in noninvasive blood glucose monitoring. In this work, black TiO2 (B-TiO2) was introduced as an electron trapping layer between TiO2 and ZnO to form TiO2@B-TiO2@ZnO core–shell nanoparticles, through a simple and safe method. The acetone sensing performance of TiO2@B-TiO2@ZnO varied with the thickness of ZnO. Because of the electron trapping effect of the introduced B-TiO2 layer, the best performing sample exhibited a low optimal operating temperature of 275 °C and a high response of 49.25–50 ppm acetone. In addition, a low detection limit of 170 ppb was obtained. The pretty selectivity of the sample was also been proved. The mechanism of enhanced acetone response was explained by the energy band-based model of TiO2@B-TiO2@ZnO core–shell nanoparticle and depletion layer theory.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Fengdong Qu,Bingxue Zhang,Xinxin Zhou,Huifang Jiang,Chuanxi Wang,Xiaohua Feng,Chunjie Jiang,Minghui Yang
The utilization of metal-organic frameworks (MOFs) as precursors or templates to design synthesize nanostructured metal oxides has attracted intense interest for their great potential applications in gas separation/storage, drug delivery, catalysis device, gas sensors, etc. In this paper, porous double-shelled nanocages (NCs), namely ZnO/Ni 0.9 Zn 0.1 O double-shelled nanocages (DSNCs), were synthesized simply through a metal-organic frameworks (MOFs) route. The ZIF-8 rhombododecahedron was first synthesized and then transformed into ZIF-8/Ni-Zn layered double hydroxides (LDH) precursor. Finally, the ZnO-inner/Ni 0.9 Zn 0.1 O-outer DSNCs were obtained through thermal annealing of the as-prepared precursor in air. The ZnO/Ni 0.9 Zn 0.1 O DSNCs, when utilized as gas sensing material, exhibited high sensitivity and selectivity towards xylene. Besides, enhanced gas sensing properties of ZnO/Ni 0.9 Zn 0.1 O DSNCs were observed when compared with ZnO NCs. Such outstanding gas sensing performance of the ZnO/Ni 0.9 Zn 0.1 O DSNCs benefits from their high porosity, large specific surface area, and synergistic effect of ZnO and Ni 0.9 Zn 0.1 O.
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ORGANIC ELECTRONICS
·
2022
·
IF 3.868
Jipeng Jing,Lihua Lin,Kaiyu Yang,Hailong Hu,Tailiang Guo,Fushan Li
Zinc oxide (ZnO) is widely used as an electron transport layer (ETL) in quantum dot light-emitting diodes (QLED) because of its advantages of appropriate energy level and the simple process at low temperature. However, its high conductivity and abundant surface defects have become essential factors limiting the development of QLED. Here, we employ sol-gel derived lithium (Li)-doped ZnO (LZO) film as an ETL for inverted red QLED to achieve low-cost and high-efficiency QLED. We show that the conduction band minimum, the density of oxygen defects and conductivity of ZnO can be tuned by Li-doping. Consequently, the red QLED with 3 wt% Li-doped ZnO ETL exhibit maximum external quantum efficiency (EQE) and current efficiency of 16.4% and 24.1 cd/A, respectively, which are about 1.3-fold greater than those of the device with ZnO ETL. The Li-doping in sol-gel derived ZnO provides a feasible strategy for low-cost and high-performance inverted QLEDs.
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Advanced Sustainable Systems
·
2022
·Vol. 7
·期 4
·2200443
·
IF 6.737
Hongli Yang,Junlun Gao,Man Yang,Huilin Hou,Fengmei Gao,Yong Luo,Weiyou Yang
The development of visible-light-induced photocatalysts is one of the critically important issues because it offers a green and sustainable route for solar energy conversion. Herein, In-doped ZnO@In 2 O 3 hybrid photocatalysts are designed and constructed through a one-pot metal-organic frameworks (MOFs)-encapsulation-derived method. The photocatalytic activity of the sample photocatalysts is systematically investigated by photocatalytic hydrogen evolution under visible light irradiation. The composition of the hybrid photocatalysts is also controlled to find the best photocatalytic activities. Interestingly, using a visible-light irradiation source, the optimized In-doped ZnO@In 2 O 3 photocatalyst shows an H 2 evolution rate of 417 µmol∙g −1 ∙h −1 , which is nearly 20 times higher than that of the In-doped ZnO sample and also exceeds most ZnO-based catalysts ever reported. The enhanced catalytic performance is ascribed to the increased visible-light response and enhanced charge separation efficiency by the synergistic effects of electron-trapped In doping and electron-donated In 2 O 3 coupling. This work presents a promising pathway for fabricating MOFs-encapsulation derived visible-light-driven composites for high photocatalytic performance towards hydrogen evolution.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Jinlong Li,Hong Zhou,Shuo Huang,Xin Gao,Qinhan Liu,Shuai Zhang,Hang Su,Haopeng Zhang,Hongyan Yue
Low conductivity and slow reaction kinetics are partly responsible limiting the sensing performance of metal-organic-framework (MOF) derived metal oxides, which can be overcome by rational composition and novel microstructural design. In this study, hollow dandelion-like Ce-Zn MOF/reduced graphene oxide (rGO) nanosheets precursor were synthesized by solvothermal reaction and the precursor was annealed to obtain CeO 2 -ZnO/rGO (CZO/rGO). The effects of polyvinylpyrrolidone (PVP), rGO and annealing temperature on its morphology and sensing properties were investigated. The unique morphology of CeO 2 -ZnO provides abundant active sites and large specific surface areas which can improve the ion diffusion efficiency, and the high conductivity of rGO reduces the interfacial resistance and improves the electron transfer rate. The optimized CZO/rGO/ITO electrode achieves a high sensitivity of 17.67 μA·μM -1 ·cm -2 and a limit of detection of 2.1 nM (S/ N = 3) for dopamine (DA) detection. This study broadens the application of MOF derivatives in DA sensing.
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RADIOCHIMICA ACTA
·
2021
·Vol. 110
·期 3
·193-203
·
IF 1.44
Wenhong Han,Guilin Wei,Yi Liu,Xirui Lu,Shunzhang Chen,Zhentao Zhang,Yi Xie,Xiaoyan Shu
A new glass solidification process aims at radioactive iodine waste was explored in order to reduce the possible harm to environment. Samples with different iodine content in silver-coated silica gel were pretreated by hydration device at 300 °C and then sintered at relatively low temperatures (500, 550 and 600 °C). XRD results show that AgI is mainly chemically fixed in the glass network with some AgI particles being physically wrapped by the glass. Moreover, as the sintering temperature reached to 550 °C, B element crystallized. SEM-EDS results show that Ag and I elements are enriched, while the other elements are evenly distributed. AFM results showed that the sample surface becomes rougher as the iodine content increases in the silver coated silica gel. The FT-IR results show that the structure of the sintered sample is mainly composed of [BiO 3 ], [BiO 6 ] and [BO 3 ]. This study provides a new sintering method by hydration device for the treatment of radioactive iodine waste.
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Molecular Catalysis
·
2022
·
IF 5.089
Huixing Xu,Xin Ye,Xiaoyu Shi,Heng Zhong,Daoping He,Binbin Jin,Fangming Jin
Catalytic production of lactic acid (LA) from biomass has attracted increasing attention due to the wide applications of LA. However, the industrial-scale production of LA is seriously limited by the complex synthetic process of efficient catalyst. In this work, we applied commercially available ZnO as a simple and facile heterogeneous catalyst to catalyze the conversion of glucose into LA under hydrothermal conditions. The ZnO possesses abundant strong Lewis acid and base sites and acts as bifunctional catalyst to promote the cascade reactions from glucose to LA, leading to a high yield of 41.5%. The robustness of catalytic process and the wide scope of applicable substrates like monosaccharides and disaccharides further extend the application of hydrothermal biomass conversion using facile catalysts.
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