FIBERS AND POLYMERS
·
2018
·Vol. 19
·期 4
·703-710
·
IF 1.353
Jiang Huiyu,Wang Yujiao,Quan Heng,Li Wei
Waterborne polyurethane modified by acrylate/nano-ZnO (PUA/ZnO) was synthesized and used to improve the wet rubbing fastness of reactive dyed cotton fabric. The reaction conditions were optimized and the products were characterized by FT-IR, TG, DSC, SEM, and particle size distribution. The dyed cotton fabrics were finished with PUA/ZnO emulsion and the rubbing fastness, ultraviolet resistant property, and wearability of treated fabrics were measured. The wet rubbing fastness of treated fabrics was increased by about 0.5–1 rate to achieve 3–4 rate, and the ultraviolet protection factor (UPF) achieved 50+ level. The whiteness, air permeability, and elongation at break of treated fabric were not decreased significantly. SEM showed that the smooth and reticular coating on the surface of treated fabric reduced the mechanical friction force between dyed fabric and rubbing cloth, and thus improved the rubbing fastness. The decomposition temperature of finished fabric was increased by 50–80 °C.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Huaixian Xiao,Na Liu,Ke Tian,Shixiang Liu,Fei Ge
Nanoparticles have been reported to induce toxicity to aquatic organisms, however, their potential impacts on phosphorus removal from wastewater by algae are unclear. In this study, the effects of nanoparticle ZnO (nano-ZnO) on phosphate (PO 4 3− ) removal by a green alga Chlorella vulgaris were investigated. We found that PO 4 3− removal efficiency was accelerated with high concentrations of nano-ZnO (0.04–0.15 mM) but reduced with low concentrations of nano-ZnO (0.005–0.04 mM) compared to the control (without nano-ZnO), suggesting that PO 4 3− removal efficiency by C. vulgaris was related to nano-ZnO concentrations. Moreover, we observed changes of nano-ZnO morphology and detected element P on the surface of nano-ZnO by using transmission electronic microscopy (TEM) combined with energy dispersive X-ray spectroscopy (EDX), indicating that PO 4 3− was interacted with nano-ZnO or the dissolved Zn 2+ from nano-ZnO. Furthermore, we confirmed this interaction induced the formation of Zn 3 (PO 4 ) 2 crystallites sedimentation by employing X-ray diffraction analysis (XRD) and X-ray photoelectron spectroscopy (XPS), which finally accelerates the removal of PO 4 3− .
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PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2018
·
IF 0
Zhitong Zhao,Anran Mao,Weiwei Gao,Hao Bai
Over exposure of UV light could cause serious damages to human being, such as DNA damage, skin aging and cancer, cataract and so on. Hence, there is an urgent need to develop optically transparent materials as windows, glasses and protection film etc. to filter UV light. In the present study, a homogeneous polyvinyl alcohol (PVA)/zinc oxide (ZnO) film was fabricated via a facile in situ method by controlling the reaction of Zn 2+ with OH - ions and the dehydration process of Zn(OH) 4 2- throughout PVA hydrogel matrix. The obtained PVA/ZnO film can absorb over 99% of UV light at wavelength region between 200 and 350 nm, and its optical transparency in the visible region was similar to that of neat PVA film (87–90%). In addition, this hybrid film was flexible (~5% strain at fracture) with excellent tensile strength (130–140 MPa), and able to be easily modulated onto various substrates as UV-protection film. Overall, this facile, low cost in situ fabrication method with environment-friendly nature could be applicable to various hydrogel systems for developing novel transparent UV-shielding nanocomposites with desired properties.
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THIN SOLID FILMS
·
2018
·
IF 1.939
Hao Li,Sirong Yu,Jinhui Hu,Enyang Liu
In this research, a simple and economical method was used to fabricate a superhydrophobic Zn coating with ZnO nanosheets on steel substrates. Electrodeposited Zn coating was firstly formed on the steel substrate for anti-corrosion. Then we used hydrothermal method to process the electrodeposited Zn coating for in-situ growth of ZnO nanosheets. After low-energy modification with pentadecafluorooctanoic acid, the Zn coating with ZnO nanosheets on the steel substrate became superhydrophobicity, with water contact angle of 158° and the sliding angle of about 6°. The prepared superhydrophobic Zn coating with ZnO nanosheets exhibited good stability and excellent self-cleaning property. As a result, this combination method could be utilized in large scale production due to its simplicity and low-cost.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 14
·12161-12168
·
IF 2.324
Xie Fan,Qin Panliang,Zhuo Longhai,Lu Zhaoqing,Wang Yafang
The synthesis of ZnO nanowires (NWs) on aramid fiber (AF) surface via a facile in situ hydrothermal method was studied and the as-obtained AFs@ZnO NWs acting as the thermal conductive fiber fillers in the fabrication of aramid paper-based materials by wet-forming process were also investigated. SEM showed a dense and uniform ZnO NWs layer with vertical alignment was well established on surface of AFs. EDS and XRD characterization further confirmed the formation of ZnO NWs on AFs surface. Compared with the pristine paper, the composite paper exhibited better thermal conductivity increased by 129% from 0.0867 to 0.1985 W/m K and kept good insulating properties inherent to aramid paper. The excellent thermal conductivity of aramid paper was mainly attributed to the effective heat conduction networks formed by the AFs@ZnO NWs within the aramid paper. This study proposed an innovative way to fabricate fibrous thermally conductive filler, which effectively improved the dispersion, retention of fillers and interfacial bonding between fillers and fibers.
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NANOTECHNOLOGY
·
2018
·Vol. 29
·期 50
·505101
·
IF 3.404
Lijia Wang,Ying Cai,Zhengbin An,Wenhong Gu,Ping Chen,Qingyun Cai
Here we report a novel drug delivery system using mesoporous inner-empty upconversion microspheres carrying drugs with ZnO quantum dots (UCMPS@ZnO) acting as a 'door-keeper' for pH-triggered drug release. Compared to other upconversion drug delivery systems, it is smarter, simpler, more efficient and more biocompatible. In particular, the UCMPS@ZnO microspheres show low cytotoxicity, are simple to produce and have a high drug loading rate (15%). Promisingly, a mice treatment experiment demonstrated that the multifunctional nanoparticles have efficient inhibition of tumor growth after a 14-day treatment. This makes UCMPS@DOX–ZnO microspheres a promising theranostic candidate in cancer treatment and clinical trials.
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PubMed
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Ying Chen,Li Wang,Ruijie Gao,Yong-Chao Zhang,Lun Pan,Chenyu Huang,Kan Liu,Xin-Yuan Chang,Xiangwen Zhang,Ji-Jun Zou
Photosynthesis with Z-scheme charge transfer has been recognized as an efficient pathway to achieve solar-energy conversion. Herein, the all-solid-state direct Z-scheme ZnO-WO 3-x nanorod arrays were synthesized by in-situ solvothermal treatment for highly piezoelectric (PE)-photoelectrochemical (PEC) water splitting. The chemical bonding between WO 3-x and ZnO via W-O-Zn and the inherent band structures/Fermi levels drive the formation of direct Z-scheme charge-transfer pathway. Importantly, the optimized structure (Zn-W-5) shows higher PEC activities with high photocurrent density of 2.39 mA/cm 2 at 1.23 V vs. RHE, which is 2.13 times higher than pure ZnO. Surprisingly, the obvious PE polarization of ZnO increases its Fermi level toward conduction band and significantly enhances Z-scheme effect between ZnO and WO 3-x . Especially, the best sample (Zn-W-5-1000 rpm) shows a photocurrent of 3.38 mA/cm 2 at 1.23 V vs. RHE, which is 3.02 times higher than pure ZnO. This work provides a facile PE polarization approach for enhancement of Z-scheme charge-transfer process.
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APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Innocent O. Arukalam,Meijiang Meng,Haigang Xiao,Yuantai Ma,Emeka E. Oguzie,Ying Li
Poly(dimethylsiloxane)-ZnO coatings modified with different amounts of perfluorodecyltrichlorosilane (FDTS) were prepared using sol-gel technique. The results of field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) examinations showed that the surface structures and roughness of the coatings were respectively influenced by the increasing addition of FDTS. The water contact angle measurements showed maximum value of 130.52° with the 0.10 g FDTS-modified coating sample. The X-ray photoelectron spectroscopy (XPS) results indicated the coatings’ hydrophobicity was also influenced by surface chemistry. The FTIR-ATR characterization results showed there was remarkable increase in the crystallinity of 0.10 g FDTS-modified coating after modification, and was confirmed by differential scanning calorimetry (DSC) analysis of crystallization temperature and the X-ray diffraction (XRD) results with an estimation of 71.29% percent crystallinity. The mechanical properties of the coatings were also conducted. The EIS measurements for anti-corrosion behavior showed that 0.10 g FDTS-modified coating had the highest barrier performance and lowest rate of degradation. Indeed, the obtained data have demonstrated that 0.10 g (≈ 0.18%) FDTS produced the most significantly effect on the surface and barrier properties of the coatings and thus, can effectively be used for anti-corrosion application in the marine environments.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 10
·1-12
·
IF 2.02
Tian Fei,Niu Libo,Chen Bo,Gao Xuejia,Lan Xingwang,Huo Li,Bai Guoyi
A novel magnetic core-shell nanocomposite Fe 3 O 4 @Chitosan@ZnO was successfully prepared by in situ chemical precipitation method. It has a clear core-shell structure with magnetic Fe 3 O 4 (about 160 nm in diameter) as core, chitosan as the inner shell, and ZnO as the outer shell, as demonstrated by the transmission electron microscopy and the related elemental mapping. Moreover, this nanocomposite has high magnetization (43.6 emu g −1 ) so that it can be easily separated from the reaction mixture within 4 s by an external magnetic field. The introduction of the natural chitosan shell, instead of the conventional SiO 2 shell, and its combination with the active ZnO ensures this novel nanocomposite green character and good catalytic performance in the synthesis of 2-benzimidazoles with moderate to excellent isolated yields at room temperature. Notably, it can be recycled seven times without appreciable loss of its initial catalytic activity, demonstrating its good stability and making it an attractive candidate for the green synthesis of 2-benzimidazoles.
A novel magnetic core-shell nanocomposite exhibited high activity and good stability in the green synthesis of 2-benzimidazoles under mild reaction conditions.
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RSC Advances
·
2015
·Vol. 5
·期 24
·18832-18840
·
IF 3.84
Jinjuan Xue,Shuaishuai Ma,Yuming Zhou,Zewu Zhang,Ping Jiang
A novel Ag/ZnO/C plasmonic photocatalyst was synthesized via a facile calcination and photodeposition route. Samples were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). The results indicated that Ag and ZnO nanoparticles sized 5–10 nm were uniformly dispersed on the surface of the carbonaceous layers in Ag/ZnO/C composites. The adsorption capacity and photocatalytic activity were investigated by adsorption and photocatalytic degradation of tetracycline hydrochloride (TC-HCl) in aqueous solution. The results showed that the obtained Ag/ZnO/C sample exhibited higher adsorption capacity and enhanced UV and visible light driven photocatalytic activity to TC-HCl compared to ZnO/C and pure ZnO. With the presence of Ag nanoparticles and carbonaceous layers incorporated in the structure, the Ag/ZnO/C composites can make use of not only the UV region of sunlight, but also the visible region and efficiently promote photogenerated electron separation and transportation as well as generating more active reaction sites, which synergistically facilitate the photocatalysis process. Our present work provides a simple and new pathway for the design of ZnO-based catalysts that respond to both UV and visible light and promotes their practical application in various environmental and energy issues driven by solar light.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Shuxian Hou,Ye Hong,Jihua Shang,Yimei Wang,Xuechao Shi,Xinxin Liu,Guoqiang Yang,Yuxuan Wang,Fei Ge,Yao Xiao,Chaldi Kaoutar,Yuan Wu,Jun Wang
The misuse of antibiotics has led to the growing problem of multidrug-resistant (MDR) bacteria, and there is still a lack of effective antibacterial agents that can replace antibiotics. Therefore, the design and development of multifunctional nanomaterials with long-term inhibitory effects on drug-resistant bacteria are extremely challenging. In this study, a multifunctional biomimetic self-assembly system, BSA-ZnO&Quercetin, based on bovine serum albumin (BSA), ZnO, and quercetin, was established using a simple and controllable method. The prepared self-assembly system has high stability and biocompatibility, and could fully combine the performance advantages of each component. BSA-ZnO&Quercetin showed excellent broad-spectrum antibacterial activity without inducing bacterial resistance. The related antibacterial mechanism of BSA-ZnO&Quercetin primarily involves biofilm inhibition and destruction, and inducing the production of reactive oxygen species, resulting in the death of the bacteria. The biomimetic self-assembly system BSA-ZnO&Quercetin constructed in this research is expected to replace antibiotics for antibacterial application.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qihang Sun,Baoyu Li,Jiaxin Hu,Hongquan Fu,Juan Zhang,Jinming Chang,Hejun Gao,Yunwen Liao
U(VI) in nuclear wastewater threatens human health and the environment due to its high toxicity and mobility. Photocatalysis is seen as a promising, simple, low-cost, and sustainable method for wastewater treatment, but existing photocatalysts face challenges like complex preparation and severe electron-hole recombination. In this work, ellipsoidal Se-linked ZnSe/ZnO was in situ constructed using a simple one-pot hydrothermal method, with non-metallic selenium serving as the carrier. In 30 minutes, the removal rate of U(VI) can reach 90.2 % in 100 mg/L U(VI) solution. The reaction kinetics of the optimal Se/ZnSe/ZnO ratio reached 0.14939 min −1 , which is nearly 10 times that of pure ZnO. Photocatalytic analysis revealed that introducing Se as the medium for electron transport in the composite material can effectively reduce electron-hole recombination, thereby enhancing photocatalytic efficiency. The results of this study offer a simple and efficient new method for photocatalytic reduction of U(VI) and provide an effective strategy for establishing a conductive medium in the heterojunction using a one-pot hydrothermal method.
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