MOLECULES
·
2023
·Vol. 28
·期 18
·6509
·
IF 4.6
Yanbiao Zhou,Qingqing Ye,Yongjun Han,Guoxu He,Changdong Chen
By taking advantage of typical dealloying and subsequent aging methods, a novel homogeneous porous brass with a micro/nano hierarchical structure was prepared without any chemical modification. The treatment of commercial brass with hot concentrated HCl solution caused preferential etching of Zn from Cu62Zn38alloy foil, leaving a microporous skeleton with an average tortuous channel size of 1.6 μm for liquid transfer. After storage in the atmosphere for 7 days, the wettability of the dealloyed brass changed from superhydrophilic to superhydrophobic with a contact angle > 156° and sliding angle < 7°. The aging treatment enhanced the hydrophobicity of the brass by the formation of Cu2O on the surface. By virtue of the opposite wettability to water and oil, the aged brass separated surfactant-stabilized water-in-oil emulsions with separation efficiency of over 99.4% and permeate flux of about 851 L·m−2·h−1even after recycling for 60 times. After 10 times of tape peeling or sandpaper abrasion, the aged brass maintained its superhydrophobicity, indicating its excellent mechanical stability. Moreover, the aged brass still retained its superhydrophobicity after exposure to high temperatures or corrosive solutions, displaying high resistance to extreme environments. The reason may be that the bicontinuous porous structure throughout the whole foil endows stable mechanical properties to tolerate extreme environments. This method should have a promising future in expanding the applications of alloys.Keywords:dealloying;porous brass;Cu2O;superhydrophobic;stability
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xiangzhong Kong,Yanting Cai,Xinwei Dai,Ruibo Jiang,Liya Rong,Xi Chen,Zhongmin Wan,Zequan Zhao,Guozhao Fang
Aqueous zinc metal batteries (AZMBs) have triggered tremendous research interest in large-scale energy storage systems due to the advantages of resource abundance, low cost and environmentally friendly. Current collectors play significant roles in enhancing the electrochemical performance of AZMBs, especially aqueous zinc metal pouch cells (AZMPCs). However, the influence of the carbon or metal based current collectors on the performance of AZMPCs has rarely been investigated. This work comprehensively studies the chemical and electrochemical corrosion behaviors of graphite felt (GF), nickel foam (Ni) and stainless steel (SS) as current collectors in AZMPCs for the first time to identify the optimal candidate. The 3D porous GF collector with chemical inertness exhibits excellent chemical corrosion resistance under 2 M ZnSO 4 + 0.2 M MnSO 4 aqueous electrolyte by immersion testing for 30 days. In addition, linear sweep voltammetry and chronoamperometry results demonstrate that GF has high electrochemical stability, which is beneficial to the inhibition of swelling and active materials shedding in pouch cells. In contrast, 2D SS and Ni collectors displays severe structural damage along with surface corrosion after cycling for 100 cycles in AZMPCs. This phenomenon could be ascribed to the intrinsic high activity of metal and formation of corrosion layer under high electrolyte content. Lastly, the corrosion behavior of SS from button cells to pouch cells has been investigated to reveal the rigorous requirements of the latter on current collectors in terms of chemical/electrochemical corrosion resistance and electrochemical stability. This work provides guidance for the development of advanced current collectors for AZMPCs.
研究领域:
材料科学
·
电化学
·
储能技术
·
腐蚀科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Heritage Science
·
2024
·Vol. 12
·期 1
·1-13
·
IF 2.6
Wu Huihua,Xie Quanhua,He Yuanyuan,He Xuefeng,Zhou Yuan,Liu Yang,Liu Yufei,Liu Yang,Wan Bo,Zhong Nianbing
Temperature changes during the chemical corrosion of stone cultural relics affect the condensation and evaporation of water and chemical reactions between soluble substances and corrosive solutions. This ultimately leads to changes in the internal structure and composition of the artifacts, which in turn lead to changes in the microstrain of cultural relics. To obtain in-situ real-time information on changes in the temperature and microstrain of stone cultural relics during chemical corrosion damage, a fiber Bragg grating (FBG) detection system was developed. The detection principle for the temperature and microstrain of sandstone was provided. Thermal field emission scanning electron microscopy, X-ray diffraction, and mercury intrusion porosimetry were used to characterize the surface morphology, composition, and pore structure of the sandstone samples, respectively. The temperature and microstrain changes of the sandstone samples under deionized water with different acidic/alkaline and salt solutions and at different temperatures were examined online in situ using the FBG measurement system. The results indicate that the dissolution of sandstone in the acidic solution (H 2 SO 4 and NaHSO 4 ) resulted in an exothermic chemical reaction as well as the dissolution of sandstone in the neutral salt solution (Na 2 SO 4 ) and alkaline solution (NaOH and Na 2 CO 3 ) led to material conversion and exothermic chemical reaction; the deionization reaction belongs to the dissolution reaction. The NaHSO 4 solution caused the most serious corrosive disease on the sandstone surface. When the temperature of the NaHSO 4 solution was 60 °C, the temperature and microstrain of the sandstone reached 63.9 °C and 253.6 με, respectively. The results of this study can support the research of revealing the corrosion mechanism of sandstone in different environments.
研究领域:
文物保护
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2018
·
IF 2.687
Yang Wenxuan,Yuan Yuan,Liu Guoyong,Zhang Bing,Yang Rongkai
Icing on aluminum conductors might cause failure of transmission lines. Much work has been done to study the issue. In this study, superhydrophobic surface with hydrangea-like micro/nano structure on aluminum was successfully prepared by ultrasonic chemical etching in combination with boiling. The wettability of the as-prepared surface was analyzed, the contact angle of the surface was 161.37° as well as the sliding angle was less than 1°. The as-prepared surface could greatly prolong the time of icing and frosting even in low temperature, for the structure induced lots of micro/nano air bags. They could certainly reduce the heat transferring between the solid surface and water. Moreover, the as-prepared surface demonstrated good stability under the continuous corrosion of simulated acid rain, remained superhydrophobicity after 7-days corrosion.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 19
·195601
·
IF 3.953
Zhongming Jiang,Jiamin Zhang,Kaizhao Wang,Tianyou Chen,Jiuwei Zhao,Kaijun Wang,Jin Hu
A mild strategy for fabricating nanoporous silver (np-Ag) pieces was reported via preparation of Ag–Ga alloys in relatively low temperature and subsequent electrochemical dealloying in nitric acid (HNO3) aqueous solution. After selectively etching Ga out of the Ag–Ga alloy, a typical three-dimensional (3D) bicontinuous nanoporous structure with a pore size of ∼67.21–159.33 nm was observed. A series of studies have shown that the addition of sodium dodecyl sulfate (SDS) results in minimum pore size. The coarsen exponent (n) is 1.61, and the activation energy was calculated to be 27.04 kJ mol−1. The ζ'-AgGa alloy prepared at low temperature can be used as the precursor for the preparation of fine np-Ags, and this method provides a new strategy for the industrial production of dealloyed np-Ag.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Wentong Liu,Zunli Mo,Chao Shuai,Simin He,Ruimei Yue,Xudong Guo,Ying Chen,Hui Zheng,Jianchen Zhu,Ruibin Guo,Nijuan Liu
The TiO 2 /CeO 2 /PPS composite coating is prepared by air spraying method. The introduction of TiO 2 and CeO 2 into the PPS substrate significantly improves the corrosion resistance of the composite coating , and the electrochemical corrosion current density reduces two orders of magnitude. The coating is surface-modified with cetyltrimethoxysilane and has good hydrophobicity , so it has excellent anti-fouling and self-cleaning ability. It has the advantages of low processing cost and simple preparation method compared with other anti-corrosion coatings, since the coating is only prepared by a physical mixing method and does not involve complex chemical reactions, which possess the potential for practical application.
研究领域:
材料科学
·
防腐蚀工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Limin Zhang,Yunyan Wang,Yong Ke,Zhumei Sun,Yun Li,Cong Peng,Mingfei Zhu,Yongjian Luo,Xiaobo Min
Zinc ferrite is a dominant phase in mass solid wastes generated from zinc or iron production, which causes the obstacle of metal recovery and recycling. A facile and efficient sulfuric acid leaching process of zinc ferrite assisted by copper powder was proposed in this study. The effects of factors on the leaching of zinc ferrite and copper were investigated. The results showed that zinc ferrite and copper were coupled and leached. The complete dissolution of zinc ferrite was obtained with wide ranges of leaching conditions. The shortest time for the complete dissolution of zinc ferrite was 10 min at 80 ℃ under the conditions: copper to zinc ferrite molar ratio of 1.5, sulfuric acid concentration of 100 g/L, liquid to solid ratio of 30 mL/g, and copper powder of + 38.5–20 μm. The least consumption of copper to realize the complete dissolution of zinc ferrite was 27.15%. The leaching kinetics was studied by the shrinking core model. It was found that zinc ferrite leaching assisted by copper was controlled by surface chemical reaction. The apparent activation energies for zinc, iron, and copper are 56 kJ/mol, 56 kJ/mol, and 50 kJ/mol, respectively. Characterization of the leaching residues and determination of iron and copper species in the leaching solution showed galvanic corrosion took place between zinc ferrite and copper, enhancing their acid dissolution.
研究领域:
冶金学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 17
·11697-11705
·
IF 3.9
Ting Chen,Wei-Zhi Song,Meng Zhang,De-Jun Sun,Duo-Shi Zhang,Chang-Long Li,Wen-Ying Cui,Ting-Ting Fan,Seeram Ramakrishna,Yun-Ze Long
The corrosion of materials severely limits the application scenarios of triboelectric nanogenerators (TENGs), especially in laboratories, chemical plants and other fields where leakage of chemically corrosive solutions is common. Here, we demonstrate a chemical-resistant triboelectric nanogenerator (CR-TENG) based on polysulfonamide (PSA) and polytetrafluoroethylene (PTFE) non-woven fabrics. The CR-TENG can stably harvest biological motion energy and perform intelligent safety protection monitoring in a strong corrosive environment. After treatment with strong acid and alkali solution for 7 days, the fabric morphology, diameter, tensile properties and output of CR-TENG are not affected, showing high reliability. CR-TENG integrated into protective equipment can detect the working status of protective equipment in real time, monitor whether it is damaged, and provide protection for wearers working in high-risk situations. In addition, the nonwoven-based CR-TENG has better wearing comfort and is promising for self-powered sensing in harsh environments.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CORROSION SCIENCE
·
2020
·
IF 6.479
Ning Peng,Libo Liang,Yuqing Wen
This study investigated the adsorption of hydrogen bubbles and tunnel formation on aluminium foil during direct current (DC) electrochemical etching in an electrolyte with and without silicone oil additive. The results indicated that the etched tunnels obtained in the electrolyte containing silicone oil were more uniformly distributed with a more consistent size and length. This was attributed to the additive ability to facilitate the desorption of large bubbles on the aluminium surface, resulting in uniform corroded regions. Moreover, the generated narrow tunnels can accelerate the hydrogen evolution inside the tunnels, resulting in increasing the length of the etched tunnels.
研究领域:
材料科学
·
电化学
·
金属腐蚀与防护
·
表面工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2021
·
IF 3.871
Bin Han,Shigen Zhu,Weiwei Dong,Yunfeng Bai,Hao Ding,Yilan Luo,Ping Di
In this study, 85-xWC-xTiC-15wt%Al 2 O 3 (x = 0, 5, 10 and 20 wt%) composites were fabricated via hot pressing sintering technology. The influences of TiC additives on the mechanical performance and electrochemical behavior of WC-Al 2 O 3 composite in NaCl solution were investigated. The mean size of WC grain showed a downward trend with the increase of TiC content. The relative density, hardness and fracture toughness of WC-based composites were improved by TiC additives. The maximum values of mechanical performance were obtained when TiC content was 10 wt%. Moreover, the research results indicated that TiC additives significantly increase the corrosion potential and decrease the corrosion current density in NaCl solution. When TiC content increased, the charge-change resistance (R ct ) value presented an uptrend, and then decreased obviously when the TiC content reached 20 wt%. The XPS spectrum and SEM images proved that TiO 2 passivation film was formed on the surface of WA15-10TiC composite. Therefore, it could be concluded that TiO 2 passive film could inhibit further corrosion of the composite.
研究领域:
材料科学
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Bin Han,Shigen Zhu,Weiwei Dong,Yunfeng Bai,Hao Ding,Yilan Luo,Ping Di
(85-x)WC–15 wt%Al 2 O 3 –xTiC (x = 0, 1.5, 2.5, 5, 10, and 20 wt%) composites were prepared by vacuum hot-press sintering. The influence of TiC addition on the corrosion behaviour of WC–Al 2 O 3 composites in 0.1 M NaOH solution was revealed. The results suggest that all the samples containing added TiC had the TiC phase and (W, Ti) C solid-solution phase, while the base composite had neither phase. With increasing added TiC content, the average grain size of WC decreased, and the relative density first increased and then decreased. Furthermore, the results suggest that the addition of TiC could noticeably increase the free corrosion potential and impedance and reduce the corrosion current density. However, the composite containing 20 wt% added TiC showed the opposite trend. Therefore, it can be concluded that the corrosion performance of the composites in an alkaline medium can be improved by adding an appropriate amount of TiC. The change in corrosion properties was caused by changes in the solid-solution phase, relative density, and TiO 2 oxide film .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 45
·1904429
·
IF 15.621
Yonggang Feng,Bolong Huang,Chengyong Yang,Qi Shao,Xiaoqing Huang
Unlike the well-established shape/composition control, surface distortion is a newly emerged yet largely unexplored nanosurface engineering for boosting electrocatalysis. Tapping into the novel electrocatalysts for taking full use of the distortion effect is therefore of importance but remains a formidable challenge. Here, an approach to designing highly distorted porous Pt nanosheets (NSs) by electrochemical erosion of ultrathin PtTe 2 NSs is reported. The inherent ultrathin feature and massive leaching of Te have conspired to produce a highly distorted structure. As a result, the generated Pt NSs exhibit a much-enhanced oxygen reduction reaction (ORR) mass and specific activity of 2.07 A mg Pt −1 and 3.1 mA cm −2 at 0.90 V versus reversible hydrogen electrode, 9.8 and 10.7 times higher than those of commercial Pt/C. The highly distorted Pt NSs can endure 30 000 cycles with negligible activity decay and structure variation. Density functional theory calculations reveal that the electrochemical corrosion induced nanopores, boundaries, and vacancies consist of Pt sites with substantially low coordination numbers deviating from the one of pristine Pt (111) surface. These Pt sites actively act as electron-depleting centers for highly efficient electron transfer toward the adsorbing O-species. This study opens a new design for fully using the distortion effect to promote ORR performance and beyond.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）