Novel Ca-SLS-LDH nanocomposites obtained via lignosulfonate modification for corrosion protection of steel bars in simulated concrete pore solution

Chen, Mengzhu; Cai, Yuxin; Zhang, Mingtao; Yu, Linwen; Wu, Fang; Jiang, Jinyu; Yang, Huan; Bi, Renke; Yu, Yang

doi:10.1016/j.clay.2021.106195

Cited by 24 publications

(8 citation statements)

References 59 publications

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“…The existence of the S]O bond indicates that there is a hydrogen bond between LDH and the sulfate groups, which is electrostatically bound to the metal on the surface of LDH, i.e., S]O/H-O-M (M ¼ Cu, Zn, Fe or Al). 35 Aer a series of probe molecules reached adsorptiondesorption equilibrium on the surface of various hydrotalcites, the retention time of the probe molecules was measured, and V n of the probe molecules in the stationary phase was calculated using eqn (9). The endothermic peak appears in the range of 600-700 C, which is due to the decomposition of sulfate formed by SDS decomposition.…”

Section: Structural Characterizationsmentioning

confidence: 99%

Adsorption of polycyclic aromatic hydrocarbons over CuZnFeAl–LDH modified by sodium dodecyl sulfate

et al. 2022

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Section: Structural Characterizationsmentioning

confidence: 99%

Adsorption of polycyclic aromatic hydrocarbons over CuZnFeAl–LDH modified by sodium dodecyl sulfate

et al. 2022

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“…The EIS results (Nyquist plot) for steel bars with or without corrosion inhibitors at different immersion times (5 days, 30 days, and 60 days) are observed in Figures 3-5. The diameter of the capacitive loop in the Nyquist plots represent the corrosion degree of steel bars [37]. It is evident that the capacitive loop of the reference group reduces over time, which reflects the corrosion caused by chloride occurred on the steel bar surface without the corrosion inhibitor protection.…”

Section: Evolution Of Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Comparative Studies on Steel Corrosion Resistance of Different Inhibitors in Chloride Environment: The Effects of Multi-Functional Protective Film

et al. 2023

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A corrosion inhibitor was widely used to improve corrosion resistance of steel bar in reinforcement concrete structure. A kind of multi-component corrosion inhibitor, which is composed of organic and inorganic substances, was developed in this research. This corrosion inhibitor was comparatively studied with various other inhibitors by using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) methods. The results show that the OCP values and charge transfer resistance (calculated by EIS curves) of the multi-component corrosion inhibitor remain, respectively, as high as −0.45 V and 932.19 kΩ·cm−2 after 60 days immersion, which are significantly better than other groups. Wide passivation interval and various peaks in cyclic voltammograms (CV) were applied to analyze the mechanism of adsorption (organic substance) and oxidation–reduction reactions (inorganic substance). The functional groups -OH in triethanolamine (TEA) and tri-isopropanolamine (TIPA) bond to the steel bar surface quickly, behaving as an adsorbent of organic substance in early age. An additional protective precipitate related to the reactions of Fe3+ was formed by inorganic substances (Fe2(MoO4)3 and FePO4), which is consistent with the EIS results and equivalent electrochemical circuits. As an eco-friendly substitute, multi-component corrosion inhibitors possess similar or even better protecting effects on steel bars in comparison to calcium nitrite. In addition, the concept of a “multi-functional protective film” was proposed, providing a new insight to achieve modified anti-corrosion capacity of inhibitors.

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“…To overcome this, surface modification, defects introduction, and building hybrid materials were common strategies reported in the literature . On the other hand, nanocomposites formed by incorporating layered inorganic materials like LDHs with polymers show remarkable changes in chemical and physical properties, , including high surface area, thermal and mechanical stability, and flexibility. , In the literature the use of MgAl-LDH for the removal of perchlorooctanoic acid, chromate, and phosphate ions proves that MgAl-LDH can be used as potent adsorbent for anionic species in native or hybrid form. MgAl-LDH shows selective adsorption toward arsenate ion depending on the molar ratio of aluminum and magnesium, nitrate ion orientation, and experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Cross-Linked Shrimp Waste-Derived Chitosan/MgAl-LDH Composite for Removal of As(V) from Wastewater and Antibacterial Activity

et al. 2023

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This work synthesized a novel chitosan-loaded MgAl-LDH (LDH = layered double hyroxide) nanocomposite, which was physicochemically characterized, and its performance in As(V) removal and antimicrobial activity was evaluated. Chitosan-loaded MgAl-LDH nanocomposite (CsC@MgAl-LDH) was prepared using cross-linked natural chitosan from shrimp waste and modified by Mg−Al. The main mechanisms predominating the separation of As(V) were elucidated. The characteristic changes confirming MgAl-LDH modification with chitosan were analyzed through Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis-differential thermal analysis, and Brunauer-Emmett-Teller measurements. Porosity and the increased surface area play an important role in arsenic adsorption and microbial activity. Adsorption kinetics follows the general order statistically confirmed by Bayesian Information Criterion differences. To understand the adsorption process, Langmuir, Freundlich, and Liu isotherms were studied at three different temperatures. It was found that Liu's isotherm model was the best-fitted model. CsC@ MgAl-LDH showed the maximum adsorption capacity of 69.29 mg g −1 toward arsenic at 60 °C. It was observed that the adsorption capacity of the material rose with the increase in temperature. The spontaneous behavior and endothermic nature of adsorption was confirmed by the thermodynamic parameters study. Minimal change in percentage removal was observed with coexisting ions. The regeneration of material and adsorption−desorption cycles revealed that the adsorbent is economically efficient. The nanocomposite was very effective against Staphylococcus aureus and Bacillus subtilus.

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Novel Ca-SLS-LDH nanocomposites obtained via lignosulfonate modification for corrosion protection of steel bars in simulated concrete pore solution

Cited by 24 publications

References 59 publications

Adsorption of polycyclic aromatic hydrocarbons over CuZnFeAl–LDH modified by sodium dodecyl sulfate

Adsorption of polycyclic aromatic hydrocarbons over CuZnFeAl–LDH modified by sodium dodecyl sulfate

Comparative Studies on Steel Corrosion Resistance of Different Inhibitors in Chloride Environment: The Effects of Multi-Functional Protective Film

Multifunctional Cross-Linked Shrimp Waste-Derived Chitosan/MgAl-LDH Composite for Removal of As(V) from Wastewater and Antibacterial Activity

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