Nanomaterials
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2024
·Vol. 14
·期 12
·1026
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IF 4.4
Shijing Xie,Min Lei,Jiawei Sun,Chongdou Yang,Wenbo Liu,Di Yun,Xiqiang Zhao,Jie Qiu
The corrosion behavior of 20G and TP347H materials was investigated in molten LiCl-NaCl-KCl salt. The corrosion rates of these materials in molten chloride salt are high and are strongly affected by the alloying surface oxide formation. The 20G shows uniform surface corrosion with almost no protective oxide formation on the surface. In contrast, the austenitic steel TP347H exhibits better corrosion resistance in molten chloride salts due to its high Cr content. Owing to the highly corrosive nature of molten chloride salts, the Cl−in molten salt could react with oxides and alloy, inducing intergranular corrosion of austenitic steel in molten chloride salt environments.
研究领域:
材料科学
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腐蚀工程
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Pei Zhang,Yu Zuo,Guochao Nie
Anodic films are prepared on AZ91D magnesium alloy in the electrolytes with Al 2 O 3 、SiC、TiO 2 、ZrO 2 and CeO 2 nanoparticles respectively. The oxide nanoparticles are partly embedded in the anodic films during the oxidation process . The film porosity decreases with the addition of oxide nanoparticles. As the film porosity increases, the film microhardness decreases while the bonding strength increases, and the microhardness of the anodic film prepared with SiC nanoparticles is as high as 900.7 HV. The increased interpore distance and the decreased film porosity could decrease the thermal cracking tendency of the anodic films. Particularly, the anodic film prepared with CeO 2 nanoparticles does not crack after heating. The crack density increases more quickly than the crack width with the changed pore parameters. After 1200 h immersion in NaCl solution the resistance values of the anodic films prepared in the electrolytes with SiC、TiO 2 、ZrO 2 and CeO 2 nanoparticles are still higher than 10 5 Ω cm 2 , two orders of magnitude higher than the values of the films prepared with Al 2 O 3 and without oxide nanoparticles, and the film capacity increases very slowly. The anodic film prepared with ZrO 2 nanoparticles shows the best corrosion resistance . The better corrosion resistance of the anodic films is attributed to the oxide nanoparticles filling the defect position, changing the film composition and improving the film defect structure .
研究领域:
材料科学
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电化学
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Yanwei Zeng,Liu Yang,Guoqiang Liu,Yichao Guo,Bing Lei,Zhiyuan Feng,Honglei Guo,Ping Zhang,Guozhe Meng
Steel rebars with oxide scale, which is usually rich of defects, are widely used in industry. On the surface of the oxide scale, it is difficult to prepare a conversion film with desirable corrosion resistance because of the acidity of conventional conversion solutions. In this work, a sol–gel solution (pH = 11) was employed to retard the diffusion of cerium ions avoiding the formation of cerium salt precipitates at room temperature. After treatments, the diffusion of cerium ions would be accelerated and a protective conversion film would form to repair natural defects on oxide scale of steel rebars at a higher temperature. This strategy can not only avoid the peeling of the oxide scale by the acid solution, but also prevent a large amount of non-uniform precipitation of the film-forming Ce 3+ ions. The conversion film@oxide scale was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization curve (PPC) etc. It is found that the corrosion resistance of the prepared film@oxide scale was enhanced greatly when the concentration of added cerium ion (III) was 0.5 M, with pH adjusted to 11. After 30 days of immersion, R ct of surface treated rebar is more 180 times that of blank sample. The excellent corrosion resistance is closely related to the double-layer structure of the prepared sol-gel film, especially an about 2 nm inner layer of cerium oxide.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yuxuan Feng,Shuhui Chen,Kaisheng Hua,Hui Li,Dong Jiang,Lujie Sheng,Dan Zhao,Jizhong Ren
Thermally rearranged(TR) polymers are usually prepared at an insert atmosphere and display high gas permeability, but their low gas selectivity results in high energy consumption. Thermal oxidation is an effective method to enhance the gas selectivity of microporous polymers. In this work, the effect of oxygen in the purge environment on imide-to-benzoxazole conversion and membrane structures was investigated. 1% oxygen content of the purge environment could restrain imide-to-benzoxazole conversion of 6FDA-DETDA/bisAPAF hydroxyl block polyimide(bHPI) membranes effectively, and oxygen induced the oxygen bridge formation, improving the gas selectivities of the resulting thermal-oxidative membranes with the increased oxygen content. Thermal-oxidative PBOCI membranes (TO-PBOCI) based on block poly(benzoxazole-co-imide)(PBOCI) precursor membranes were prepared to enhance gas separation performance of microporous polymers. The stable polybenzoxazole structures and microphase separation of polybenzoxazole blocks maintained membrane structures and the gas transport channels in the thermal-oxidative process at high temperature. Significantly, the remaining hydroxyl groups in PBOCI precursor membranes were beneficial for oxygen bridge formations of TO-PBOCI membranes, enhancing H 2 /CH 4 selectivity. As a result, the TO-PBOCI membranes treated at a high temperature kept high H 2 permeability and H 2 /CH 4 selectivity, surpassing the 2008 Robeson upper bound. The study about TO-PBOCI membranes promotes a better understanding of the polymeric materials and process development of microporous polymer membranes for hydrogen separation applications.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Foods
·
2025
·Vol. 14
·期 10
·1678
·
IF 5.1
Mengyuan Niu,Jiaxin Wang,Zhaoying Xun,Mengzhuo Liu,He Li,Weiyi Wang,Yuchen Wang,Chao Guo,Hanyu Li,Ning Xu,Huajiang Zhang,Ning Xia
In this study, hazelnut shell-based vegetable carbon black (HCB) was synthesized from renewable agricultural waste and incorporated into chitosan (CS) and gelatin (GEL) matrices to fabricate active packaging films. The structure of HCB was characterized, and the structure, physicochemical properties, antibacterial activity, ultraviolet resistance, and functional performance of CS-GEL-HCB films with varying HCB contents (0, 1, 5, and 9 wt% based on GEL) were systematically investigated. The FT-IR results revealed that intermolecular hydrogen bonds were formed between HCB and CS and GEL. The results showed that the tensile strength of CS-GEL film (15.83 ± 0.40~32.06 ± 0.61 MPa), as well as its water vapor and oxygen barrier properties (0.55 ± 0.03~0.15 ± 0.02 g/d·m2), and UV-visible light barrier properties were significantly improved (p< 0.05) after the addition of HCB, while the water permeability, moisture content, and water solubility of CS-GEL film were effectively reduced (24.84 ± 0.45~20.10 ± 0.45%). More importantly, the CS-GEL-HCB film exhibited enhanced ultraviolet barrier properties, which helped delay the oxidation and deterioration of the oil sample during the accelerated light oxidation test. These results suggest that the CS-GEL-HCB film could serve as an effective food packaging material to improve the oxidation stability of soybean oil in the food industry, showing great potential in maintaining food quality and extending shelf life.
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Pei Zhang,Yu Zuo,Guochao Nie
Microarc oxidation films on 2024 aluminium alloy were prepared in sodium silicate-based electrolyte with α-Al 2 O 3, SiC, TiO 2 , ZrO 2 and CeO 2 nanoparticles . The effects of oxide nanoparticles on the pore parameters and the properties of the films were studied. EDS and XRD analysis showed that the nanoparticles partly entered the film, probably by the combination effects of embedding and melting. The porosity of the microarc oxidation films prepared in electrolytes with nanoparticles increased to some extent. With the addition of the different nanoparticles, the film porosity increased from 9.6% to 21.6%, the bonding strength of the films to the adhesives increased from 12.3 MPa to 22.8 MPa, and the film microhardness decreased from 785.7 HV to 564.2 HV. Particularly, the microhardness of the film prepared with SiC nanoparticles was as high as 1063.5 HV. The addition of all the nanoparticles into the electrolytes did not affect the thermal cracking resistance of the films. EIS measurements showed that after 1440 h immersion in NaCl solution the resistance of the microarc oxidation films prepared in electrolyte with nanoparticles was still much higher than that of the original film, and the film capacity increased slowly. Among the nanoparticles, TiO 2 and CeO 2 showed the best effect to increase the corrosion resistance . Weight loss test results showed that the corrosion rate of the films prepared with TiO 2 and CeO 2 nanoparticles was only about one third of the original film after 8640 h immersion. The good corrosion resistance of the microarc oxidation films may depend mainly on the good shielding property of the inner compact layer.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Hao Yu,Ce Zhang,Xin Lu
Titanium and its alloy powders are highly sensitive to oxygen, and the limited development of deoxygenation processes restricts the recycling of powders with elevated oxygen levels. In this study, we employed calcium hydride as a deoxygenating reductant and implemented a normal pressure solid-state deoxygenation technique, the in-situ reactions of Ca and H 2 generated from the decomposition of calcium hydride, along with partial gaseous CaH, effectively reduce the oxygen content in the powders. By performing the deoxygenation above the β-transition temperature, we successfully reduced the oxygen content in titanium alloy powder from 3593 ppm to 839 ppm. The deoxygenated powder retained the original appearance, size, and morphology of the initial powder, with no residual impurity elements. The thickness of the surface oxide film was reduced to 3.5 nm, and the interstitial oxygen content was lowered to 300 ppm. In comparison with the current deoxidation in solid-state process, this method significantly reduced the total process time while achieving an equivalent oxygen reduction rate.
研究领域:
材料科学
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冶金工程
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产品关联
DOI
高影响因子
DESALINATION
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2023
·
IF 9.9
Shasha Zhang,Rongli Fang,Le Zhang,Shunjiang Huang,Yanshuang Zhao,Yue Wang
Two-dimensional (2D) layer material MXene (Ti 3 C 2 T x ) is a promising electrode material in capacitive deionization (CDI) because of its advantages of large capacitance, high conductivity and abundant active sites. However, MXene nanosheets have a large number of metastable metal atoms, which are easy to react with dissolved oxygen and form metal oxides , resulting in structural instability and attenuation of electrochemical performance of MXene. Moreover, the inherent defects of MXene layered structure that are easy to stack, seriously limiting its application in CDI. In this paper, MXene fully coated by WS 2 antioxidant film with mesoporous structure was designed and successfully prepared by hydrothermal method to form a 3D mutually supported heterostructure , so as to improve the structural stability and CDI performance of MXene. The heterostructure performs abundant mesoporous, excellent electrical conductivity , good hydrophilicity and excellent cyclic stability. Therefore, the WS 2 @MXene composite demonstrates high specific capacitance (217.0 F g −1 ) and retention rate of 90.51 % after 1000 GCD cycles. The hybrid AC//WS 2 @MXene cell composed of AC anode and WS 2 @MXene cathode shows excellent desalination capacity (39.1 mg g −1 ). The retention rate of the cell is still 94.9 % after 40 desalting cycles, which is better than that of AC//MXene cell (84.4 %).
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
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IF 7.9
Xiaoshuai Yu,Mo Zhang,Lingjie Dai,Shah Noor,Yan Liu,Chuncheng Yang,Jianshe Lian,Guoyong Wang
Hydrogen production by water electrolysis is efficient and has high throughput. But the scarcity of current noble metal catalysts limits its scalability. In contrast, transition metals are rich in reserves. Replacing noble metal catalysts with them would significantly cut the cost of water electrolysis for hydrogen production. However, a single transition metal's catalytic performance is far from that of noble metals. Studies show multi-transition metallic elements often have better catalytic properties due to coupling effects, like those of iron, cobalt, nickel enhancing catalyst activity and selectivity. Also, iron, cobalt, and nickel phosphides easily get partially oxidized in air, forming an oxide layer with thickness order FeP > CoP > NiP. Adjusting the proportion of these elements can control the oxide film thickness, and a proper one can improve catalyst activity. This article explores the mechanism and coupling effect of iron, cobalt, and nickel phosphides as overall water splitting catalysts. The chosen Fe 0.2 Co 0.6 Ni 0.2 P with an optimal oxide film thickness shows good electrochemical performance for oxygen evolution reaction (280 mV in 1.0 M KOH at 100 mA cm⁻ 2 ), good hydrogen evolution reaction performance in both acidic and alkaline environments, and has the lowest overall hydrolytic potential in alkaline electrolyte with excellent 300-h stability.
研究领域:
材料科学
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化学工程
·
可再生能源
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Yuan Qin,Mingxia Wu,Yongfeng Yang,Yi Yang,Gang Yang
To improve the antiwear properties of halloysite nanotubes as an oil-based additive, the effect of thermal activation on the tribological properties of halloysite was investigated. The results showed that the anti-wear properties of the halloysite and calcined products are improved by 34.54% and 45.45 –54.76%, respectively, compared with the base oil. The outstanding wear resistance of the surface lubricated by the calcined product is attributed to the faster and easier formation of a multilayer nanocrystalline tribofilm, which mainly contains the nanocrystalline transition layer, the oxide film (composed of nanoscale iron oxide , Al 2 O 3 , SiO x ) and the amorphous carbon film . The findings here provide new insights into optimizing the tribological properties of phyllosilicate and enrich the tribological mechanism of halloysites.
研究领域:
材料科学
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摩擦学
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Kemeng Qin,Xinyu Sun,Ruican Wang,Jingmin Liu,Haitao Wang,Yi Wang,Shuo Wang
The development of sustainable and high-performance food packaging materials is crucial for addressing global food waste and environmental pollution issues. An innovative approach was proposed by using fish skin protein (FSP) from Channa argus as a natural carrier to promote the self-assembly of rosmarinic acid (RA) and curcumin (CUR) into stable nanospheres (FSP/CUR/RA) through non-covalent interactions such as hydrogen bonds, π-alkyl/π-anion interactions, and electrostatic interactions in this study. Compared with binary systems, the self-assembled FSP/CUR/RA ternary nanospheres exhibited significant advantages in colloidal stability and functionality: the optimized RA6 nanospheres have the smallest particle size (508 ± 19.30 nm), the highest ζ-potential (13.04 mV), and excellent antioxidant activity (ABTS + scavenging rate of 87.91 % at 20 μL), effectively overcoming the limitations of poor solubility and instability of CUR and RA. Upon incorporating the nanospheres into the active film, its overall performance was significantly enhanced. Specifically: Barrier properties were improved, with the water vapor transmission rate reduced to 4.06 × 10 −13 g m −1 ·Pa −1 ·s −1 , representing a 27.6 % decrease compared to the pure FSP film. Mechanical properties were optimized due to RA's effective inhibition of CUR aggregation, achieving a well-balanced tensile strength (TS) and elongation at break (EAB). The film demonstrated outstanding antioxidant capacity, with a free radical scavenging rate of 86.39 %, significantly higher than the control groups. Multifunctional characteristics were evident, including ultraviolet shielding capability, controlled release of CUR/RA, and complete biocompatibility (cell viability 100 %). In practical applications, FSP/CUR/RA films significantly extended the shelf life of fresh shrimp by reducing weight loss (3 % compared to 4.44 % in the control group), maintaining a low TVB-N level (11.84 mg/100 g after 3 days), and inhibiting lipid oxidation (TBARS < 1 mg MDA/100 g). This study not only provided a sustainable strategy for the value-added utilization of fish processing by-products but also promoted the design of multifunctional food packaging materials with enhanced preservation capability.
研究领域:
食品包装
·
可持续材料
·
生物高分子
·
功能性薄膜
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2025
·
IF 4.4
Peng Feng,Donghai Xu,Gang Yin,Kunkun Song,Ruibo Wang,Zhiyuan Li,Pan Wang
This study investigated the corrosion behavior of 316 L (316LSS) and 304 (304SS) stainless steels under a Na 2 SO 4 deposition layer in supercritical water (SCW). The salt layer reduced oxide film densification versus pure SCW, with 304SS exhibiting more severe corrosion (e.g., pitting) due to the absence of Mo which resists pitting corrosion. Without the salt layer, oxide film thicknesses were 6.50 µm (316LSS) and 1.60 µm (304SS); in contrast, 6.52 µm and 9.33 µm, respectively, indicating thicker in SCW with the salt layer. At 723 K and 25 MPa, higher water density increased Ni/Fe ion solubilities, while the salt layer trapped these ions in the microenvironment between the layer and oxide film, generating a locally acidic and oxidizing environment via hydrolysis of Ni/Fe ions. This process accelerated metal ion leaching and oxide dissolution, further enhanced in the presence of SO 4 2- . Na 2 SO 4 deposition layer and SCW synergistically intensified corrosion in both alloys.
研究领域:
材料科学
·
腐蚀工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）