CORROSION SCIENCE
·
2024
·
IF 7.4
Liangliang Xiong,Huaning Jiang,Mengxue Wu,Yongji Gong,Xiaoqiang Fan,Minhao Zhu
A centimeter-size carbon nitride (CN) film, with nanoscale thickness, is in situ deposited on various metals through the thermal condensation of melamine, achieving broad and uniform coverage, without any pre- and post-treatments. As the temperature rises, the nitrogen content in the film increases, leading to the part of CN to transform into g-C 3 N 4 . Benefit from higher Gibbs adsorption free energies of g-C 3 N 4 with Cl - and O 2 in aqueous environment, a 30 nm CN film deposited at 475 ℃ with large g-C 3 N 4 network, minimal segregation and low internal stress enables pure metals and alloys to achieve over 90 % protection efficiency.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zhan Shu,MengQi Li,Lu Gan,Lijia Wan,Xiaoling Chen,Xiaohang Zhang,Weijun Gui
Highly luminescent GdVO 4 :Eu 3+ /carbon dots (CDs) nanocomposite was synthesized by hydrothermal deposition method for the first time. With the use of dialyzed CDs solution as precursor, the synthetized composite shows negligible emission intensity of CDs. On replacing the dialyzed CDs solution with the crude one, highly luminescent composite can be obtained successfully. Based on the analysis of XPS and FT-IR spectra, one can deduce that the existence of a large amount of citrate anions, ethylenediamine cations and polymer-like CDs in the crude CDs solution make it as nutrient solution of CDs, which can not only facilitate growth of CDs on the surface of GVE, but also greatly prevent nitrogen atoms from falling off the particles during the hydrothermal deposition process. For the dialyzed CDs solution, due to the ions and polymer-like CDs being thoroughly dialyzed, the coated CDs are fragile during hydrothermal deposition process. Besides, the effects of different dosages of ammonia on emission intensities of the two composites are studied. Based on the designable patterns for security application, one can think that the highly luminescent composite is one of the most promising candidates in the anti-counterfeiting field.
研究领域:
材料科学
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光学
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化学工程
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产品关联
DOI
高影响因子
LUMINESCENCE
·
2023
·Vol. 38
·期 8
·1521-1528
·
IF 2.9
Zhan Shu,Mingzhe Du,Mengqi Li,Yanghui Liu,Lu Gan,Xiaohang Zhang,Weijun Gui
To obtain optimal luminescence, 0.12 g of GdVO 4 :3%Eu 3+ nanocrystals (NCs) and different volumes of nitrogen-doped carbon dots (N-CDs) crude solution were used as precursors, and the composite synthesized using the hydrothermal deposition method showed optimal luminescence when 11 ml (2.45 mmol) crude solution was used. In addition, similar composites with the same molar ratio as GVE/cCDs(11) were also prepared with the hydrothermal and physical mixing processes. Based on the test results of XRD, XPS, and PL spectra, for the composite GVE/cCDs(11), the highest (lowest) peak intensity of the C–C/C=C (C=O/C=N) bond, which was 1.18 (0.75) times that of GVE/cCDs-m, indicated most N-CDs deposition and led to their highest emission intensity under 365 nm excitation, although nitrogen atoms in the composite were shed slightly during the deposition process. Finally, as can be seen from the patterns designed for security applications that the optimally luminescent composite is one of the most promising candidates in the anti-counterfeiting field.
研究领域:
材料科学
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化学
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光学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Cuiyan Li,Guibiao Li,Haibo Ouyang,Jianfeng Huang,Xianghui Hou
Carbon fiber reinforced carbon matrix containing ZrC (C/C–ZrC) composites were prepared by hydrothermal deposition combined with carbothermal reduction. The submicron ZrC particles (100–300 nm) were dispersed in the matrix. The stress-strain curves of the composites presented a typical pseudo-plastic fracture behavior . The mass and linear ablation rates of the composites were 3.7 × 10 −3 g/s and 4.2 × 10 −3 mm/s, respectively. The formation of ZrO 2 glass layer reduced erosion of the composites in the ablation center. The continuous C–ZrC–ZrO 2 skeleton layer generated from the oxidation of ZrC can protect the composites from erosion at the ablation brim region. The obtained C/C–ZrC composites present a promising potential as ablation resistance materials.
研究领域:
材料科学
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复合材料工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yuqian Huang,Rongfeng Tang,Peng Xiao,Bo Che,Yan Wang,Huihui Gao,Gang Wang,Changfei Zhu,Tao Chen
Sulfuration plays a decisive role in enhancing crystal growth and passivate defects in the fabrication of high-efficiency metal-sulfide solar cells. However, the traditional sulfuration process always suffers from high-price professional equipment, tedious processes, low activity of S, or high toxicity of H2S. Here, we develop a desired in situ sulfuration by introducing tartaric acid additive into the hydrothermal deposition process of Sb2S3. Tartaric acid, sodium thiosulfate, and potassium antimony tartaric can form Sb2Sx-contained (x > 3) as-prepared films. Encouragingly, the annealing becomes an inspiring in situ sulfuration process, which can obtain a more compact absorber layer. In addition, the crystallinity and defect property of the Sb2S3 film are also improved significantly. Finally, we achieve a high-performance Sb2S3 solar cell with a power conversion efficiency of 6.31%, which shows an encouraging enhancement of ∼15% compared with the traditional hydrothermal process. This study provides an innovative way to prepare high-efficiency Sb2S3 solar cells and provides a desirable guide to realize the in situ sulfuration process.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 19
·1-13
·
IF 2.8
Lan Mingyang,Fan Zhanhui,Yang Chao,Qiu Jianhui,Zang Limin
Flexible energy storage devices have been applied more and more in recent years, such as wearable electronic products, folding mobile phones, and so on. In this study, through the use of waste face mask (WFM) unique three-layer structure, designed a zinc-ion hybrid capacitor (ZHC), the outer layer of WFM through the vapor phase polymerization method on the surface of WFM uniformly covered with a layer of polypyrrole (PPy), to enhance the conductivity of the material and improve the surface topography. The loading of PPy is then increased by electrodeposition and dopants are introduced to further improve its electrochemical properties. It improves the problem that the conductivity of the active material becomes poor with increasing polymerization time and cannot continue to grow so that the electrochemical and mechanical properties of the electrode can be effectively strengthened. The other pole also through the way of electrodeposition on the surface of Zn deposition. ZHC is assembled using ZnSO 4 /gelatin as the electrolyte and WFM inner layer as the separator. The assembled ZHC has excellent electrochemical performance, with a mass-specific capacity of 121.5 mAh g −1 at 0.1 A g −1 and an energy density of 97.6 Wh kg −1 at 0.1 A g −1 . In addition, the capacity retention rate remains 77.1% after 10,000 charge-discharge cycles. The assembled ZHC allows a small fan or digital watch to function properly. These results indicate that the prepared ZHC can be widely used in reality.
研究领域:
材料科学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE ENGINEERING
·
2025
·
IF 2.6
Xiaobing Li,Ruijie Lu,Zhenping Wu,Jianfeng Chen
In this study, a multi-step synergistic process combining chemical etching, hydrothermal deposition and stearic acid modification was proposed for the corrosion protection needs of aluminium alloys in marine environments, and micro- and nano-composite superhydrophobic coatings (STZ) were successfully constructed on the surface of aluminium bases. Scanning electron microscopy, EDS, and XRD confirmed the presence of zinc oxide particles with micron-level rough structures on the coating surface. Contact angle testing showed a static contact angle of up to 156° and a rolling angle of less than 5°, which is consistent with superhydrophobic properties. Electrochemical tests showed that the corrosion current density of the STZ coating was three orders of magnitude lower than that of the untreated substrate, and the charge transfer resistance was significantly higher, confirming a significant increase in corrosion resistance. After 400 linear abrasion cycles, the coating retained 70% of its hydrophobic properties. In self-cleaning tests, the rate of contaminant adhesion was reduced by 75% compared to the untreated substrate.This process provides a feasible solution for the long-term protection of aluminium alloys in harsh environments.
研究领域:
材料科学
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表面工程
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腐蚀与防护
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纳米材料
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功能涂层
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 48
·期 10
·6397-6405
·
IF 1.676
Yang Mengru,Shi Yonghong,Li Yuangang,Li Huajing,Luo Ningdan,Li Jin,Fan Jing,Zhou Anning
Abstract 2D Bi 2 S 3 /CdS nanosheet arrays have been constructed by a simple three-step method. Firstly, BiOI nanosheet arrays have been electrochemically grown on the surface of conductive FTO substrate and then converted into Bi 2 S 3 nanosheet arrays by ion exchange. Finally, CdS was hydrothermally deposited onto the surface of Bi 2 S 3 nanosheet arrays to form hybrid Bi 2 S 3 /CdS nanosheet arrays. The obtained hybrid heterojunction arrays have been used as photoanodes for photoelectrochemical hydrogen evolution and showed enhanced performance and prolonged stability. The photocurrent density of the elegant Bi 2 S 3 /CdS nanosheet arrays reaches 9.48 mA/cm 2 at 1.23 V RHE under an illumination of 100 mW/cm 2 from AM 1.5G sun simulator, which is more than ten times higher than that of the pure Bi 2 S 3 nanosheet arrays and the photocurrent density does not decline obviously after 4 h of continuous operation. Ultimately, a rational mechanism is proposed to elucidate the high performance and excellent stability of Bi 2 S 3 /CdS nanosheet arrays for photoelectrochemical cells. Graphic Abstract To obtain nanosheet arrays : Arrays of Bi 2 S 3 /CdS nanosheets on a FTO substrate are synthesized by electrodeposition, ion exchange and hydrothermal process. The Bi 2 S 3 /CdS nanosheet photoanodes show better photoactive and photostability compared to bare Bi 2 S 3 (CdS) nanosheets for photoelectrochemical splitting of water.
研究领域:
材料科学
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纳米技术
·
光电化学
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产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 31
·17489-17496
·
IF 2.936
Xiaodong Sun,Mingxu Sui,Guangzhen Cui,Ling Li,Xiaopeng Li,Xuliang Lv,Fan Wu,Guangxin Gu
Electromagnetic irradiation has caused environmental pollution and harmful effects on human health. The use of effective materials to attenuate electromagnetic energy is urgently required. In this study, Fe3O4 nanoparticles (NPs) decorated on a CuS platelet-based sphere (CuS/Fe3O4) with popcorn chicken-like micromorphology were synthesized through a solvothermal deposition method. The effects of reaction temperature and quantity of Fe3O4 NPs on the heterostructures, morphologies and electromagnetic absorption (EA) properties of the heterostructures were investigated. CuS/Fe3O4 heterostructures exhibited remarkable enhancement in comparison with pure Fe3O4 NPs and the CuS platelet-based sphere. With the contribution from dielectric and magnetic losses, a CuS/Fe3O4 heterostructure-loaded composite could achieve a minimum reflection loss (RL) of −61.32 dB at 14.00 GHz and an effective EA bandwidth (≤−10 dB) of 4.15 GHz at a thickness of only 1.5 mm simultaneously. The current study indicates that the CuS/Fe3O4 heterostructures can potentially be applied as advanced electromagnetic absorbers.
研究领域:
材料科学
·
电磁工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Rumin Ma,Jingpeng Li,Shenjie Han,Zaixing Wu,Yongjie Bao,Sheng He,Yuhe Chen
In this study, different morphologies of WO 3 ⋅H 2 O/TiO 2 (WT) heterojunction films were successfully synthesized on bamboo biotemplate via facile two-step hydrothermal deposition methods. The WO 3 ·H 2 O self-assembled by nanosheets or nanoplates on anatase TiO 2 -coated bamboo (TiO 2 -B) exhibited a distinctive surface color. The addition of WO 3 ·H 2 O could significantly extend the optical responses of TiO 2 -B in the ultraviolet to the visible region. Based on the various analysis techniques, the formation mechanisms of the WO 3 ·H 2 O hierarchical architectures with different crystal structures were also proposed. In addition, the photoactivity and post illumination activity of WT films were examined by constructing ·O 2 ˉ and ·OH in light and in light-off, respectively. The results showed that WT films with different crystal structures exhibited different photoactivity and energy storage abilities, and the photoactivity of WT films was negatively correlated with their energy storage ability. The presence of an anatase TiO 2 thin film on the bamboo surface provided abundant active sites for WO 3 ·H 2 O growth, which formed direct S-scheme heterojunctions for solar energy conversion and storage. Therefore, we anticipate that solar-driven energy storage heterojunctions with accessible and rich crystal morphologies will provide new insights for various applications, such as efficient wastewater treatment , self-cleaning coating, and air purification.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
能量存储
·
光化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）