Colloid and Interface Science Communications
·
2021
·
IF 4.914
Mohd Talha,Qi Wang,Mingjie Xu,Yucong Ma,Zhonghui Li,Yuanhua Lin
In this research, silane hybrid coatings based on γ-glycidoxypropyltrimethoxysilane/ methyltrimethoxysilane/ 3-aminopropyl trimethoxysilane (GPTMS/MTMS/ APS) were produce by sol-gel method. ZnO nanoparticles were embedded in the silane coating and this exclusive silane coating was employed to 316 L stainless steel (SS) substrates by the dip-coating method. The surface characteristics of the samples were examined by FTIR analysis, XRD , SEM-EDS, and contact angle measurements. Further, the corrosion protection behavior of the coatings was examined in 3.5 wt% aqueous NaCl solution using potentiodynamic polarization , EIS, and SECM analysis. AFM was applied to determine the surface morphologies of the samples after the polarization test. Our results exhibited that the coatings enhanced the anti-corrosion performance of SS substrates. It was also obtained that the combination of GPTMS/MTMS/APS provided better corrosion protection properties and acts as a strong physical barrier to the corrosive molecules. The presence of nano ZnO further improved the protective barrier of the coating.
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Current Analytical Chemistry
·
2022
·Vol. 18
·期 10
·1131-1140
·
IF 2.374
Tao Jiaqing,Zhao Changrong,Zhuang Chang,You Zhaoyang,Shah Kinjal J.
Background: Zinc oxide nanoparticles (ZnO-NPs) have been shown to exert a non-negligible impact on the environment. Objective: Kaolin and humic acid were used in the aqueous environment to study their effects on the removal of ZnO-NPs. Methods: In this work, polyaluminum ferric
chloride (PAFC)/cationic polyacrylamide (CPAM) coagulants were used together with kaolin and humic acid to study their effects on the removal of ZnO-NPs and analyze their mechanism of action. Results: The results showed that the removal rate of ZnO-NPs in the humic acid system decreased
by about 30% compared to that in the pure water system, and increasing ionic strength and humic acid concentration were not conducive to removing ZnO-NPs. On the other hand, the ZnO-NPs removal rate in the kaolin system was up to 96.28%, and increasing ionic strength and kaolin concentration
contributed to the removal of ZnO-NPs. In the humic acid and kaolin systems, the effects of coagulant dosage and pH on the removal of ZnO-NPs were about the same as in the pure water system. Moreover, 5 mg/L humic acid inhibited floc growth during removal of ZnO-NPs by coagulation with PAFC/CPAM.
In contrast, 5 mg/L kaolin promoted flocs growth, resulting in stronger and more stable flocs and a 5.25% increase in the fractal dimension compared to the pure water system. Conclusion: These results suggested that suspended solids and natural organic matter in the water could directly
affect the effectiveness of coagulation to remove ZnO-NPs.
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Scientific Reports
·
2022
·Vol. 12
·期 1
·1-13
·
IF 4.996
Ren Zhenkun,Han Xibin,Wang Lixin,Wang Yi
Artesunate was reported to have inhibition effect on tumors via amplified oxidative stress while the lack of intratumoral ferrous ions supply greatly hinders its efficacy. Herein, the AS/GOD@HAZnO NPs we proposed could be efficiently taken in by the affinity between hyaluronic acid and the CD44 receptors. DLS and TEM results manifested the nano-size (~ 160 nm) and circular shape of AS/GOD@HAZnO NPs. Due to the acid-responsive degradation, AS/GOD@HAZnO NPs realized responsive release (up to 80%) in acid environment while only 20% was released in neutral medium. The cellular and in vivo experiment showed that co-delivery of AS and GOD via HAZnO NPs could effectively induce the overproduction of ROS and cut the glucose supply of tumor cells, and thus result in efficient cell apoptosis and tumor inhibition.
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高影响因子
Journal of Materiomics
·
2026
·
IF 10.6
Shuheng Lin,Yixin Yang,Xi Lin,Yoav Kalcheim,Daniel Q. Tan
An order-of-magnitude reduction in leakage current density via 0.1 mol% In 2 O 3 doping compared to reference varistors. • Synergy of doping and low temperature sintering increased interface-state density (Ns) at grain boundaries and barrier height. • The 900 °C fired microstructure corroborates the strengthened boundary insulation, evidenced by charge distribution across grain boundaries using DPC-STEM. ZnO-based varistors protect sensitive electronics by clamping high-voltage transients closely associating with dopant chemistry and grain-boundary architecture. Here, nano-ZnO precursors coupled with 0.1% (in mole) In 2 O 3 enable low-temperature sintering and dense ZnO-Bi 2 O 3 varistors. Record-low leakage current (0.03 μA/cm 2 ), high nonlinearity ( α = 68) and elevated breakdown field (692 V/mm) are achieved simultaneously, fully compatible with Ag inner electrodes. The synergy-resulted increase in interface-state density (Ns) at grain boundaries raises the Schottky barrier height ( ϕ b ) from 0.723 eV to 0.744 eV by thickening electron depletion layer. Impedance spectroscopy reveals higher activation energy (1.02 eV), longer grain-boundary relaxation times, and higher resistivity with In 2 O 3 -doping, supporting the Double Schottky Barrier model, while in-situ DPC-STEM directly maps strengthened charge trapping across individual boundaries. The formulation fires 150 °C below industrial practice and transfers immediately to LTCC multilayer chips for miniaturized, high-performance surge protectors. Download: Download high-res image (350KB) Download: Download full-size image
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Hongjian Wen,Xinhua Zhou,Zhichuan Shen,Zhicheng Peng,Huayao Chen,Li Hao,Hongjun Zhou
Polyethyleneimine (PEI) was immobilized on SBA-15 for obtaining polyethyleneimine-modified silica [email protected] ( [email protected] , [email protected] , and [email protected] ). With the coordination from PEI, zinc ions were impregnated on the [email protected] , and then, Zn 2+ [email protected] were calcined at 550 ℃ to obtain the nano zinc oxide loaded on the mesoporous silica, ZnO-SBA-15s (ZnO-SBA-1.0, ZnO-SBA-1.5, and ZnO-SBA-2.0). The anti-bacterial activity of ZnO-loaded SBA-15 was; thereafter, assessed by the zone of inhibition and enzyme labeling methods. The results confirmed that the coordination ability of the imino groups in PEI helped adsorb more zinc ions during the process of impregnation so that more nano-ZnO could be supported on the surface of SBA-15. The modification did not change the mesostructure of the two-dimensional hexagonal phase and orderliness of SBA-15. At the mass ratio of PEI:SBA-15 = 1.0:1, 1.5:1, and 2.0:1, the concentration of zinc element (wt.%) was measured by inductively coupled plasma optical emission spectrometry as 2.5, 2.56, and 3.5% for ZnO-SBA-1.0, ZnO-SBA-1.5, and ZnO-SBA-2.0, respectively. The size of inhibition of SBA-15, ZnO-SBA-0, ZnO-SBA-1.0, ZnO-SBA-1.5, and ZnO-SBA-2.0 were 0, 1.14 ± 0.01, 2.56 ± 0.01, 2.58 ± 0.01, and 2.69 ± 0.02 cm, respectively. ZnO-SBA-15s suppressed the growth of Escherichia coli compared to blank SBA-15 in a ZnO dose-dependent manner.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Zeng Dong,Ziqing Du,Xingyue Wu,Kefeng Zhai,Zhaojun Wei,Marwan M.A. Rashed
The current study sought to fabricate pectin nano-films from Premna microphylla Turcz (PMTP) leaves using a combination of ZnO-carboxymethyl cellulose. The rheological and physical properties of fabricated nano-ZnO films were studied. Spectroscopy FT-IR, microscopic study (SEM), thermogravimetry (TG), and XRD were applied to characterize the fabricated film. The antibacterial activity of the nanofilm was determined using the antibacterial circle method. The findings showed that the addition of PMTP can reduce the nanofilm color, water solubility/hydrophilicity, air permeability, and ultraviolet light permeability of the nanofilm. Treatment CPN0.5 achieved the optimized Tensile strength (TS) of 4.50 Mpa, significant differences compared to CPN2 (3.99 Mpa) and CPN1 (3.65 Mpa). In addition, treatment CPN1 achieved the lowest WVP value (29.35) compared to the highest value (41.62) achieved by CPN0.5 treatment with no significant differences with CPN3 (29.7) and CPN1 (30.98) treatments. Elongation (E%) at break was the best for each CP10 (74.9) and CPN0.5 (73.03). Moreover, ZnO can enhance the nanofilm activity and the nanofilm water swelling ratio. Furthermore, adding ZnO to the nano-formula improved the antibacterial activity of the fabricated film against Staphylococcus aureus . In sum, nanofilms fabricated of PMTP and ZnO possess promising prospects as antibacterial agents in packaging applications.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 17
·期 1
·15-23
·
IF 4.803
Qu Qi,Zeng Chuan,Huang Jing,Wang Mengfan,Qi Wei,He Zhimin
Recently, various semiconductor/metal composites have been developed to fabricate surface-enhanced Raman spectroscopy substrates. However, low metal loading on semiconductors is still a challenge. In this study, cystine was introduced to increase the accumulation of gold nanoparticles on zinc oxide, owing to the biomineralization property of cystine. Morphological analysis revealed that the obtained ZnO/Au/cystine composite not only had a higher metal loading but also formed a porous structure, which is beneficial for Raman performance. Compared with ZnO/Au, the ZnO/Au/cystine substrate displayed a 40-fold enhancement in the Raman signal and a lower limit of detection (10 −11 mol·L −1 ) in the detection of rhodamine 6G. Moreover, the substrate has favorable homogeneity and stability. Finally, ZnO/Au/cystine displayed excellent performance toward crystal violet and methylene blue in a test based on river water samples. This study provided a promising method to fabricate sensitive semiconductor/noble metal-based surface-enhanced Raman spectroscopy substrates for Raman detection.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 33
·期 1
·458-467
·
IF 2.478
Dong Hua-Dong,Zhao Jian-Ping,Peng Ming-Xing,Zhang Yong-Hui
The Schottky barrier at the interface between the semiconductor phase and the metal phase has excellent rectification effect which can greatly facilitate the formation of the electron accumulation region. The interface electronic modulation can promote the formation of electron depletion layer in the gas sensing process, which is a powerful strategy to improve the sensing performance. In this work, ZnO–TiC composites were successfully prepared. XRD, TEM, BET and XPS characterizations of the ZnO–TiC composites were proformed to investigate the compositions and structures. The as-synthesized samples were applied to fabricate gas sensors to investigate their gas sensing performance. Compared to pure ZnO and TiC, the composites achieved high sensitivity (232 for 100 ppm aniline) and linear detection ( R 2 = 0.986) of aniline. The improvement of sensor performance is mainly attributed to the electronic modulation of Schottky barrier at the interface between ZnO and TiC. Our results indicate that the construction of ZnO-TiC Schottky barrier is a promising strategy for enhancing the performance of gas sensors.
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Polymers
·
2018
·Vol. 10
·期 2
·127
·
IF 2.935
Qianni Zhang,Ruizhi Peng,Chunfu Zhang,Dazheng Chen,Zhenhua Lin,Jingjing Chang,Jincheng Zhang,Yue Hao
The aqueous-based Zn-ammine complex solutions represent one of the most promising routes to obtain the ZnO electron transport layer (ETL) at a low temperature in inverted organic solar cells (OSCs). However, to dope the ZnO film processed from the Zn-ammine complex solutions is difficult since the introduction of metal ions into the Zn-ammine complex is a nontrivial process as ammonium hydroxide tends to precipitate metal salts due to acid-base neutralization reactions. In this paper, we investigate the inverted OSCs with Al-doped-ZnO ETL made by immersion of metallic Al into the Zn-ammine precursor solution. The effects of ZnO layer with different immersion time of Al on film properties and solar cell performance have been studied. The results show that, with the Al-doped-ZnO ETL, an improvement of the device performance could be obtained compared with the device with the un-doped ZnO ETL. The improved device performance is attributed to the enhancement of charge carrier mobility leading to a decreased charge carrier recombination and improved charge collection efficiency. The fabricated thin film transistors with the same ZnO or AZO films confirm the improved electrical characteristics of the Al doped ZnO film.Keywords:organic solar cell;inverted structure;electron transport layer;Al-doped-ZnO
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DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Weidong Sang,Xuefeng Yang,Haitao Tian,Jialin Wang,Yuchang Wang,Zhengxin Li
During the process of sintering diamond/ceramic composites, the wettability between diamond and the ceramic matrix is poor, and there are many irregular pores in the composites, which leads a low bending strength of the composites and easy shedding of diamond. In order to solve these problems, SiO 2 -B 2 O 3 -Li 2 O-ZnO-Al 2 O 3 glass-ceramic coated diamond was prepared by a sol-gel method, and the properties of the coated diamond abrasive particles were studied. The SBLZA glass-ceramic-coated diamond exhibited high thermal stability and excellent oxidation resistance, making it a good protective material for diamond. The oxidation resistance of the SBLZA glass-ceramic-coated diamond was determined by thermogravimetric analysis (TGA). The uncoated diamond abrasive particles began to oxidize at 723 °C, while the coated abrasive particles were resistant to oxidation at temperatures up to 1000 °C. The glass-ceramic coating significantly improved the bonding between diamond and the ceramic matrix. The use of SBLZA glass-ceramic-coated diamond instead of uncoated diamond in the composites sintered at 750 °C resulted in a decrease in the volume expansion rate of the diamond/ceramic composites from 37.2 % to 28.5 %, and an increase in the bending strength from 38.4 MPa to 61.5 MPa.
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EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2017
·Vol. 2017
·期 32
·3787-3793
·
IF 2.444
Qianji Han,Haikuo Zheng,Mingxing Wu
Graphical Highly effective sulfide-sphere counter electrodes are prepared for ZnO nanorod-based quantum-dot-sensitized solar cells. To increase the competitiveness of quantum-dot-sensitized solar cells (QDSCs) among the various photovoltaic devices, it is necessary to develop new counter-electrode (CE) catalysts to replace the unviable Pt CE. Herein, a series of metal-sulfide spheres (e.g., FeS 2 , Co 9 S 8 , NiS, CuS, and ZnS) are designed and synthesized as CE catalysts for QDSCs. As inferred from cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization-curve results, except for ZnS, all of the sulfide spheres perform better than Pt toward S x 2– /S 2– redox-couple regeneration, among which, NiS shows the highest catalytic activity, followed by Co 9 S 8 , CuS, and FeS 2 . The power conversion efficiencies of ZnO nanorod-array photoanode-based QDSCs with sulfide-sphere CEs are 2.5 % (NiS), 2.2 % (Co 9 S 8 ), 1.8 % (CuS), and 0.8 % (FeS 2 ), much higher than that of their Pt CE-based counterparts (0.30 %).
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Nanoscience and Nanotechnology Letters
·
2014
·Vol. 6
·期 11
·953-958
·
IF 1.444
Yang Lili,Chen Gang,Sun Yunfei,Han Donglai,Yang Shuo,Gao Ming,Wang Zhe,Zou Ping,Luan Hongmei,Yang Jinghai
We construct CdS quantum dots (QDs) sensitized solar cells with ZnO nanorods as photoanodes. To enlarge the QDs loading surface of ZnO nanorods, we perform primary and secondary growth to obtain ZnO nanorods with different length. We investigate its influence on the photovoltaic performance
of the solar cells. The photovoltaic performance for ZnO nanorods photoanodes with secondary growth exhibits a 41% enhancement in energy conversion efficiency compared to the ZnO nanorods photoanodes with primary growth.
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危险品化学品经营许可证（带存储）