Preparation and Properties of Formic Acid Intercalated Mg-Al Layered Double Hydroxides Deicing Additive

2021 ◽  
Vol 1035 ◽  
pp. 966-971
Author(s):  
Jian You Yu ◽  
Xiao Bin Han ◽  
Peng He ◽  
Zi Peng Wang ◽  
Jian Ying Yu
Keyword(s):  
Aqueous Solution ◽  
Formic Acid ◽  
Layered Double Hydroxide ◽  
Adhesion Force ◽  
Freezing Point ◽  
Asphalt Mixture ◽  
Assembly Technology ◽  
Surface Ice ◽  
Double Hydroxide ◽  
Surface Freezing

Formic acid intercalated Mg-Al layered double hydroxide (Mg-Al Fo-LDH) was prepared by calcination reduction intercalation assembly technology. The structure of the deicing additive was characterized by fourier transform infrared (FTIR) and X-ray diffraction (XRD). The freezing point of aqueous solution with different quality of deicing additive and the surface freezing point and adhesion of asphalt mixture were tested. The results show that formic acid ion has been intercalated into the interlayer of Mg-Al layered double hydroxide by FTIR and XRD patterns. The freezing point of 5wt% Mg-Al Fo-LDH aqueous solution reaches -9.32 °C, while the surface freezing point of the asphalt mixture mixed with 5wt% Mg-Al Fo-LDH is -6.5°C. At -8 °C, the adhesion force of the surface ice layer is 78.4N, and after the asphalt mixture is soaked in water, the surface freezing point and adhesion force of the ice layer do not change.

Preparation and Properties of a Self-Deicing Coating Based on Layered Double Hydroxide

2017 ◽  
Vol 898 ◽  
pp. 1553-1560
Author(s):  
Yi Yi ◽  
Jian Ying Yu ◽  
Xiao Chen ◽  
Zhi Long Cao ◽  
Min Wu
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Layered Double Hydroxide ◽  
Adhesion Force ◽  
Freezing Point ◽  
The Self ◽  
Asphalt Emulsion ◽  
Recovery Method ◽  
Coating Surface ◽  
Double Hydroxide

Layered double hydroxide containing chloride (Cl- LDHs) was obtained by calcination recovery method, and the self-deicing coating was prepared by blending Cl- LDHs and SBR modified asphalt emulsion. Freezing point and carbon steel corrosion rate of Cl- LDHs solution were tested. Deicing performance of the self-deicing coating was investigated by testing the melting ice point of coating surface and the adhesion force between ice and self-deicing coating,then the deicing durability were evaluated by immersion test and microscopic observation. The results showed that the freezing point of solution with 20wt% Cl- LDHs was-9.1°C. The corrosion rate of carbon steel in 20wt.% Cl- LDHs solution was 1.17mm/a, which was only a little higher than corrosion rate of carbon steel in tap water. When the amount of the self-deicing coating with 8wt.% Cl- LDHs was 400 g/m2, the melting ice point on the coating surface was-3.2°C and the adhesion force between ice and self-deicing coating was 24N at-15°C. After immersion in water, the deicing performance and microstructure of the self-deicing coating almost unchanged, which indicates that Cl- LDHs in the self-deicing coating wasn’t dissolved and the coating had excellent deicing durability.

Investigation of layered double hydroxide/carbon dot nanocomposite on removal efficiency of Pb2+ from aqueous solution

2021 ◽  
pp. 116774
Author(s):  
Fataneh Vasheghani Farahani ◽  
Mohammad Hassan Amini ◽  
Seyed Hamid Ahmadi ◽  
Seyed Amirabbas Zakaria
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Removal Efficiency ◽  
Carbon Dot ◽  
Double Hydroxide

Aqueous-phase synthesis of layered double hydroxide nanoplates as catalysts for the oxygen evolution reaction

2018 ◽  
Vol 47 (48) ◽  
pp. 17342-17348 ◽  
Author(s):  
Euiyoung Jung ◽  
Jae Kyeom Kim ◽  
Hyungsuk Choi ◽  
Min Hyung Lee ◽  
Taekyung Yu
Keyword(s):  
Aqueous Solution ◽  
Transition Metal ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Aqueous Phase ◽  
Oxygen Evolution Reaction ◽  
Metal Salt ◽  
Catalytic Performance ◽  
Phase Synthesis ◽  
Double Hydroxide

Transition metal LDH nanoplates were synthesized by heating an aqueous solution containing a metal salt, PEG, and octylamine. The LDH nanoplates showed comparable electrochemical catalytic performance for the oxygen evolution reaction.

Removal efficiency of arsenate and phosphate from aqueous solution using layered double hydroxide materials: intercalation vs. precipitation

2010 ◽  
Vol 20 (22) ◽  
pp. 4684 ◽  
Author(s):  
Yunfeng Xu ◽  
Yingchun Dai ◽  
Jizhi Zhou ◽  
Zhi Ping Xu ◽  
Guangren Qian ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Removal Efficiency ◽  
Double Hydroxide

scholarly journals Rapid Removal and Efficient Recovery of Tetracycline Antibiotics in Aqueous Solution Using Layered Double Hydroxide Components in an In Situ-Adsorption Process

Crystals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 342 ◽  
Author(s):  
Kwanjira Panplado ◽  
Maliwan Subsadsana ◽  
Supalax Srijaranai ◽  
Sira Sansuk
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Environmental Water ◽  
Efficient Removal ◽  
In Situ Adsorption ◽  
Aluminum Ions ◽  
Alkaline Conditions ◽  
Efficient Recovery ◽  
Double Hydroxide

This work demonstrates a simple approach for the efficient removal of tetracycline (TC) antibiotic from an aqueous solution. The in situ-adsorption removal method involved instant precipitation formation of mixed metal hydroxides (MMHs), which could immediately act as a sorbent for capturing TC from an aqueous solution, by employing layered double hydroxide (LDH) components including magnesium and aluminum ions in alkaline conditions. By using this approach, 100% removal of TC can be accomplished within 4 min under optimized conditions. The fast removal possibly resulted from an instantaneous adsorption of TC molecules onto the charged surface of MMHs via hydrogen bonding and electrostatically induced attraction. The results revealed that our removal technique was superior to the use of LDH as a sorbent in terms of both removal kinetics and efficiency. Moreover, the recovery of captured TC was tested under the influence of various common anions. It was found that 98% recovery could be simply achieved by using phosphate, possibly due to its highly charged density. Furthermore, this method was successful for efficient removal of TC in real environmental water samples.

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