CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.5
Li Xu,Hualiang Huang
In the article, a silane film on the surface of Q235 steel was successfully prepared using 3-mercaptopropyltrimethoxysilane. The film-forming mechanism and anti-corrosion properties of the silane film on Q235 steel in a 3.5 wt.% NaCl solution were investigated using electrochemical measurements, surface analysis and theoretical calculations. The results indicated that the prepared silane film could effectively suppress the corrosion of Q235 steel, and its highest corrosion inhibition efficiency was 98.64% when the film was cured at 140°C for 60 minutes. That could be explained that the silane film was predominantly bonded to the steel surface through forming Si-O-Fe bond, accompanying a crosslinked Si-O-Si network structure formed during the curing process, which effectively reduced the dissolution of iron, thereby significantly enhancing the corrosion resistance of Q235 steel. In addition, the silane film possessed excellent hydrophobic properties caused by the long-chain alkyl group, preventing the penetration of corrosive medium.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Ye Xing,Mingyuan Li,Xinpeng Zhang,Decheng Li,Kefu Chao,Xin Wang
Moisture-electric generators (MEGs) have emerged as a promising strategy for harvesting energy from omnipresent atmospheric moisture, which is still compromised by restricted electrical output and harsh working temperatures. Herein, a high-output MEG based on high-conductive anti-freezing poly(acrylamide)/NaCl ionic hydrogel (PNIH) is developed to convert ambient chemical potential energy into electricity. The PNIH-based MEG (PNIH-MEG) can achieve excellent electrical outputs with a continuous output voltage of 1.6 V for 16 days, a current density of 1.2 mA/cm 2 , and a power density of 129 µW/cm 2 , which is attributed to synergistic effects of moisture-induced ion migration, interfacial electrical double layer, interfacial reactions, and high conductivity of PNIH. Especially, the persistent voltage output (1.6 V) of the PNIH-MEG is still maintained even under harsh working conditions of low temperature (−20°C) and low relative humidity (20% RH), which indicates a fascinating all-weather operational capability. Furthermore, an integrated array composed of 72 MEGs in series or 6 MEGs in parallel generates a voltage of 120 V or a current of 5.0 mA, respectively, which can further charge commercial capacitors and directly power ten thermohydrometers. Consequently, this work demonstrates new insights for designing renewable, clean, and sustainable power generation with high-output performance and environmental adaptability.
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ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Wenjuan Liu,Fahe Cao,Yan Xia,Linrong Chang,Jianqing Zhang
Corrosion of magnesium is initiated from film-free region where the pit corrosion is the main corrosion form. The incubation and growth of active spots in film-free region is affected by the concentration of Cl − and the composition of surface film. Application of scanning electrochemical microscopy (SECM) in feedback mode for corrosion study of AM60 and AMCe1 (AM60 with additional Ce) magnesium alloy in different NaCl solutions is presented. SECM mapping mode was also used to monitor the electrochemical processes on AM60 and AMCe1 alloys immersed in NaCl solutions. The results indicate that the electrochemical behavior of magnesium alloy is different depending on chloride ion concentration and its surface film. Enhanced localized corrosion of magnesium alloy with chloride ions concentration shows that higher concentrated chloride ions results in the rapid initiation and quick growth of active spots, facilitates breakdown and high hydration of surface film. Meanwhile, scratch tests were performed on magnesium alloy, known to develop an artificial defect to monitor variation of electrochemical activity. In the proximity of the local defect, the accelerated electrochemistry activity originating from the high-hydration of surface film is observed when chloride ions are concentrated in the environment. Furthermore, the addition of rare earth element Ce is advantage of reducing the tendency of incubation and growth of active spots due to its more complete and protective surface film.
研究领域:
材料科学
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腐蚀工程
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电化学
·
金属材料
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xuhong Jiang,Mengmeng Sun,Zhuoyuan Chen,Jiangping Jing,Guiying Lu,Chang Feng
Boosting the photoinduced cathodic protection (CP) for metals in NaCl solution is crucial for achieving the application of photoelectrochemical conversion in marine corrosion protection. An environmentally friendly three-dimensional ZnIn 2 S 4 /TiO 2 nanoflowerbush (NFB) photoelectrode was constructed with sufficient interfacial incorporation based on the ultrafine branched TiO 2 nanobush substrate via a facile in situ hydrothermal method . This ZnIn 2 S 4 /TiO 2 NFB nanoheterojunction composite behaves excellent photoinduced CP performance for metallic materials. This is owing to the optimized construction of photoelectrode with relatively negative band potential, wide solar spectrum response, effective generation and collection of photoinduced electrons. The morphology, distribution and performance of ZnIn 2 S 4 vary with different substrates. The pure ZnIn 2 S 4 powder is nanoflower sphere composed of a lot of thin petals; when ZnIn 2 S 4 grow onto the FTO glass, the ZnIn 2 S 4 petals are distributed vertically on the two-dimensional structure; when ZnIn 2 S 4 grow on the three-dimensional ultrafine branched TiO 2 nanobush substrate, a ZnIn 2 S 4 /TiO 2 NFB architecture with ultrafine TiO 2 branchlet cores are formed. This ZnIn 2 S 4 /TiO 2 NFB photoelectrode can achieve efficient photoinduced CP performance for pure copper and low alloy steels with different negative self-corrosion potentials, such as Cu (−0.18 V), E40 (−0.45 V), Q345 (−0.55 V) and Q235 carbon steel (−0.65 V) under simulated sunlight irradiation in NaCl solution without additional hole scavengers, and the photoinduced CP current densities reach as high as 170, 72, 63 and 44 μA cm −2 , respectively. The high-efficiency photoinduced CP performance is closely related to the band structure gradient matching between the TiO 2 and ZnIn 2 S 4 , prompting both the widened absorption of solar spectrum and high-efficiency transfer of the photogenerated electron–hole pairs. Importantly, the negative band potential of ZnIn 2 S 4 endues a lower surface work function which benefits the electron transport to the under-protected metallic materials to achieve photoinduced CP. This photoelectrode exhibits huge photoinduced CP application potential in marine environments.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Xiaoyi Qu,Bo Ding,Jing Li,Meng Liang,Liqin Du,Yutuo Wei,Ribo Huang,Hao Pang
A novel β-glucosidase gene was isolated from Pseudoalteromonas sp. GXQ-1 and heterologously expressed in Escherichia coli . The activity of the encoded enzyme, PABGL, toward p -nitrophenyl-β-D-glucopyranoside was increased 8.74-fold by the presence of 3 M NaCl relative to the absence of added NaCl. PABGL hydrolyzed a variety of soy isoflavone substrates. For the conversion of daidzin to daidzein, the production rate was 1.44 mM/h. The addition of NaCl enhanced the hydrolytic activity of PABGL toward daidzin and genistein; the maximum activation by NaCl was 3.48- and 6.79-fold, respectively. This is the first report of a halophilic β-glucosidase from Pseudoalteromonas spp., and represents the β-glucosidase with the highest multiple of activation by NaCl. PABGL exhibits strong potential for applications in food processing and industrial production.
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PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2017
·
IF 1.591
Yu Qing Zhu,Xing Chen,David Julian McClements,Liqiang Zou,Wei Liu
A novel Pickering-stabilized emulsion gel with controlled rheological properties was derived from wheat gliadin nanoparticles-stabilized emulsions by altering preparation conditions (pH, ionic strength or oil content). The formed nanoparticles were relatively small uniform spheres particles (d < 120 nm), whose surface potential (ζ-potential) changed from +9.9 mV to −14.19 mV with the pH of the solution increased from 3.5 to 9. The isoelectric point of gliadin nanoparticles was around pH 6.8. The nanoparticles were highly susceptible to aggregation at pH values near their isoelectric point due to a reduction of electrostatic repulsion between them. Pickering-stabilized emulsions could be formed by blending the nanoparticles with oil and water, and Pickering-stabilized emulsion gels were obtained by altering pH, ionic strength or oil content of the dispersions. Creaming stabilities and rheological properties of the emulsion gels were modulated. Stable Pickering-stabilized emulsion gels with relatively large elastic modulus were formed with 70% oil content at pH 5.5 and 6.0 in the absence of NaCl. The viscosity increased with the increasing of oil content and salt concentration, and the viscosity enhanced when the pH around the isoelectric point. These results may facilitate the design of novel viscoelastic emulsion gels with the Pickering-stabilize mechanism which are suitable for utilizing in foods and other products.
研究领域:
食品科学
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胶体与表面化学
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材料科学
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 14
·16963-16971
·
IF 3.056
Gong Pijian,Li Chunyu,Li Xinxue
Marine diesel engines produce a lot of exhaust gas (NO, SO 2 ). Based on the situation that wet scrubbing methods have been already applied to ship desulfurization and seawater is easily accessible around the ships, this paper proposed a novel AOP (advanced oxidation process) of NaClO 2 (sodium chlorite) with Cl − (abundant Cl − exist in seawater) to remove NO from the flue gases of marine engines. The buffer capacity of NaAC (sodium acetate), the effect of Cl − concentration, and Cl − promotion mechanism on NO removal were investigated. The result showed that the existence of NaAC in solution could inhibit the rapid decline of the solution pH. The addition of Cl − achieved a remarkable promotion to NO removal at lower NaClO 2 concentration, which was due to the fast generation of ClO 2 from the promotion decomposition of NaClO 2 by Cl − in acidic condition. Then, the thermodynamic and dynamic mechanism of the generation of ClO 2 was intensively analyzed. And the mechanism of NO removal was discussed finally.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lechen Diao,Wei Zhou,Biao Zhang,Chunsheng Shi,Zhichao Miao,Jin Zhou,Chunnian He
Developing highly efficient, low-cost, and stable bifunctional oxygen electrocatalysts is essential for the wide popularization of rechargeable Zn-air batteries. Combining zero-dimensional metal nanoparticles with two-dimensional metal oxide nanosheets is an appealing strategy to balance performance and cost. However, the precise construction of these composites remains a great challenge, and their interaction mechanisms lack thorough study. Herein, a cobalt-oxide-based bifunctional oxygen electrocatalyst comprising a rich Co-CoO heterointerface (CoO/Co@NG) was synthesized via a NaCl sealing-assisted pyrolysis strategy. The NaCl crystals played the role of a closed nanoreactor , which facilitated the formation of a CoO-Co heterojunction . Experimental results and theoretical calculations confirmed that the ingeniously constructed heterojunction expedited the oxygen reduction reaction and oxygen evolution reaction kinetics, which is superior to Pt/C. When serving as the air electrode in an assembled liquid-state Zn-air battery , the battery shows high power density (215 mW cm −2 ), specific capacity (710 mAh g zn −1 ), and outstanding durability (720 h at 10 mA cm −2 ). This work provides an innovative avenue to design high-performance heterojunction electrocatalysts for perdurable Zn-air batteries.
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PubMed
高影响因子
Rice Science
·
2023
·
IF 4.8
Yang Xiaozheng,Liu Yusong,Huang Jing,Tao Ye,Wang Yifeng,Shen Renfang,Zhu Xiaofang
Phosphorus (P) starvation in rice facilitates the reutilization of root cell wall P by enhancing the pectin content. NaCl modulates pectin content, however, it is still unknown whether NaCl is also involved in the process of pectin regulated cell wall P remobilization in rice under P starved conditions. In this study, we found that 10 mmol/L NaCl increased the shoot and root biomasses under P deficiency to a remarkable extent, in company with the elevated shoot and root soluble P contents in rice. Further analysis indicated that exogenous NaCl enhanced the root cell wall P mobilization by increasing the pectin methylesterase activity and uronic acid content in pectin suggesting the involvement of NaCl in the process of cell wall P reutilization in P starved rice roots. Additionally, exogenous NaCl up-regulated the expression of P transporter OsPT6, which was induced by P deficiency, suggesting that NaCl also facilitated the P translocation prominently from root to shoot in P starved rice. Moreover, exogenous abscisic acid (ABA) can reverse the NaCl-mediated mitigation under P deficiency, indicating the involvement of ABA in the NaCl regulated root cell wall P reutilization. Taken together, our results demonstrated that NaCl can activate the reutilization of root cell wall P in P starved rice, which is dependent on the ABA accumulation pathway.
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Coatings
·
2023
·Vol. 13
·期 7
·1246
·
IF 3.4
Wenjuan Qi,Desheng Ding,Weijie Luo,Weiliang Jin,Qian Kou,Chuntao Ge,Saijun Xiao
The hardness and wear resistance of amorphous Al–Mn alloy coatings can be improved by incorporating ceramic particles into them to extend their application. In this paper, Al–Mn/WC composite coatings have been prepared with electrodeposition in stirred AlCl3–NaCl–KCl–MnCl2molten salts at 180 °C with the addition of WC particles. The effects of stirring speed (400–700 rpm) and cathode current density (15–75 mA/cm2) on the produced Al–Mn/WC composite coatings have been studied. At 600 rpm and 700 rpm, the Al–Mn/WC composite coatings exhibited the best uniform distribution of the embedded WC particles, with the tested microhardness value up to 650 HV0.1, compared with 530 HV0.1of the Al–Mn alloy. Moreover, under various cathode current densities, the best quality of the Al–Mn/WC composite coating was obtained at 55 mA/cm2, with a homogeneous distribution of WC particles and the highest microhardness value (670 HV0.1). It is expected that this method could be extended to be applied for the preparation of aluminum-based and magnesium-based ceramic composite coatings.Keywords:AlCl3–NaCl–KCl–MnCl2molten salts;electrodeposition;WC particles;Al–Mn/WC composite coating
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Fei Xue,Fengzhu Zhao,Jihui Wang,Wenbin Hu
Zn 1- x Cr x O resistive switching film with different Cr content was prepared on SS304 substrate by sol–gel method combined with spin plating and heat treatment. The surface morphology, composition, structure, semiconductor type and oxygen vacancy concentration of Zn 1- x Cr x O films were observed and analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Mott-Schottky curves, X-ray photoelectron spectroscopy (XPS) electron paramagnetic resonance spectroscopy (ESR) and density functional theory (DFT) calculation. And the corrosion resistance of Zn 1- x Cr x O film were investigated by polarization curves and electrochemical impedance spectroscopy (EIS). The results show that the prepared Zn 1- x Cr x O films have a uniform dense surface which belongs to n -type semiconductor type, and the oxygen vacancy concentration in the films increases with the increase of Cr content. With the increasing of Cr content, the corrosion resistance of films is decreased. During the immersion process, the corrosion resistance of Zn 1- x Cr x O film is firstly increased and then decreased with increasing immersion time. By applying immersion and polarization treatment the corrosion resistance of Zn 1- x Cr x O film could be regulated between the high and low resistance states (HRS and LRS) due to the creation and disappearance of oxygen vacancies in the film.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Nazhen Zhang,Lijuan Ma,Jing Zang,Yue Gao,Yue Zhong,Songyang Sun,Yanwei Li,Yanhui Li
The exquisitely engineered multifunctional electrocatalysts for oxygen reduction reactions (ORR), hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) hold significant importance in current research. In this work, layered porous C-FeNC-900 electrocatalyst has been successfully prepared using a NaCl induced pyrolysis strategy based on metal organic frameworks (MOFs). The presence of NaCl during the pyrolysis process not only effectively enhances the porous structures, but also promotes numerous Fe N x active sites and improves the degree of carbon graphitization. Due to the simultaneous construction of highly active Fe N x sites on the graded porous carbon skeleton, the electrochemical accessibility and corrosion resistance are improved. The prepared C-FeNC-900 electrocatalyst exhibits a half wave potential of 0.859 V for ORR in alkaline conditions, exceeds the half wave potential of Pt/C at 0.854 V. Moreover, the results demonstrate C-FeNC-900 has excellent stability, with an initial current density retention of 88.45 % after a durability lasting 10,000 s. At the same time, C FeNC-900 has possesses a potential of 1.67 V at a current density of 10 mA cm −2 during OER testing, with a Tafel slope of 209 mV. The C FeNC-900 also displays HER performance with potential of 405 mV and Tafel slope of 178.4 mV. This study provides a new perspective to construct multifunctional catalysts with well-designed structure for clean energy conversion technologies.
研究领域:
材料化学
·
电化学
·
纳米催化
·
能源材料
·
多孔材料科学
·
可持续能源技术
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危险品化学品经营许可证（带存储）