Synthesis of Al(OH) <sub>3</sub> Nanostructures from Al(OH) <sub>3</sub> Microagglomerates via Dissolution‐Precipitation Route

Yu, Bo; Tian, Zhenhao; Xiong, Jie; Liu, Xiang

doi:10.1155/2013/718979

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…For all the samples, four strong peaks were observed at 39 • , 45 • , 65 • , and 78 • , which matched well to Al (PDF #04-0708) [25]. The peaks at 25 • , 57 • , and 63 • could also correspond to the peaks in the standard card for Al(OH) 3 (PDF #26-0025) [26]. Thus, the corrosion products were mainly Al(OH) 3 .…”

Section: Ir and Xrdmentioning

confidence: 64%

Erosion Corrosion Behavior of Aluminum in Flowing Deionized Water at Various Temperatures

et al. 2020

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To optimize the operating temperature and flow velocity of cooling water in a high voltage direct current (HVDC) thyristor valve cooling system, the erosion corrosion characteristics of aluminum electrodes in deionized water at various temperatures were studied. With increasing water temperature, the corrosion current of the aluminum electrode gradually increases and the charge transfer impedance gradually decreases, thus, the corrosion of aluminum tends to become serious. The aluminum electrode in 50 °C deionized water has the most negative corrosion potential (−0.930 V), the maximum corrosion current (1.115 × 10−6 A cm−2) and the minimum charge transfer impedance (8.828 × 10−6 Ω), thus, the aluminum corrosion at this temperature is the most serious. When the temperature of deionized water increases, the thermodynamic activity of the ions and dissolved oxygen in the deionized water increases, and the mass transfer process accelerates. Therefore, the electrochemical corrosion reaction of the aluminum surface will be accelerated. The corrosion products covering the aluminum electrode surface are mainly Al(OH)3. With increasing water temperature, the number of pits and grooves formed by corrosion on the aluminum surface increased. In this paper, the molar activation energy Ea and the equilibrium constant K of the aluminum corrosion reaction with various temperatures are calculated. This clarifies the effect of temperature on the aluminum corrosion reaction, which provides a basis for protecting aluminum from corrosion. The results of this study will contribute to research that is focused on the improvement of production techniques used for HVDC thyristor valve cooling systems.

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Section: Ir and Xrdmentioning

confidence: 64%

Erosion Corrosion Behavior of Aluminum in Flowing Deionized Water at Various Temperatures

et al. 2020

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“…However, the pattern of prepared Al(OH) 3 nanoparticles is indexed as a pure monoclinic phase (spacegroup: P21/n) (JCPDS No. 33-0018), the narrow sharp peaks indicate that Al(OH) 3 nanoparticles are well crystallized and broaden peak refers to the synthesis of nanostructure (12,13) . However, Atomic force microscope analysis found the average grain size of nanoparticles was 53.46, with a spherical shape with homogenous distribution through the glass substrate (16,17) .…”

Section: Discussionmentioning

confidence: 99%

“…The Synthesis of Al(OH) 3 -NPs was done by modification of the method (11,12). At the first, prepared sodium hydroxide solution by dissolved (39.6) g form NaOH in (110) ml of deionized water in a beaker.…”

Section: Synthesis Of Al(oh) 3 -Nps By a Chemical Precipitation Methodsmentioning

confidence: 99%

Pathological effect of Aluminium hydroxide compared with polymer-based nanoparticles on neonatal mice brain

Al-Murshedy¹,

Fares²

2020

ATMPH

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The present study carried to investigate the toxic pathology effect of both bulk Al(OH) 3 and Al(OH) 3 nanoparticles materials. Also, to examined cerebral cortex-kb p65 expression level by immunohistochemistry test. The crystalline and grain size of nanoparticles and it is morphology are tested by XRD, AFM, SEM, and EDEX respectively. This study included 40 neonatal mice of both sexes were randomly divided into 7 groups. This group's immunized subcutaneously, two times, the first dose was at third postnatal, and the second dose was at 17 days postnatal. These groups classified as follows:-the 1st group of mice injected by normal saline which serves as control negative, while the 2nd group immunized by oval albumin which serves as control positive. The 3rd group immunized by bulk-Al(OH) 3 , the 4th group immunized by Al(OH). The Brain tissue samples were collected from each at 4 weeks and 8weeks post first immunization for histological examination. The Histopathological results of the 1st group, 2nd group do not show clear histopathological changes. Whereas, histopathological changes of the 3rd group was severe at 4 weeks post first immunization, while at 8 weeks post first immunization pathological changes were more severe. However, histopathology changes of the 4th group were less severe (moderate) in 4, 8 weeks post first immunization compared with the 3rd group. The immunohistochemical test results of the 3rd group show a highly significant increase (P < 0.05) (70.2%, 95.6 %) in 4, 8 weeks post first immunization. Whereas, the results of the immunohistochemical test of the 1stad 2nd group, show a significant difference (p<0.05) at 4, 8 weeks post first immunization. While the 4th group shows a significant difference (61%) (P<0.05) in 8 weeks post first immunization compared with Bulk-Al (OH) 3 . These results demonstrated the toxic effects of bulk Al (OH) 3 on the neonatal brain. This study suggested that the chitosan alone and presence with Al(OH) 3 in nanomaterial or bulk form safer and less toxic as an adjuvant.In conclusion, It could be concluded that repeated exposure of neonatal mice to Bulk-Al(OH) 3 induced histological alterations in various areas of the brain. In addition, results further showed that the expression of NF-κB p65 is significantly increased in the brain of Bulk-Al(OH) 3 mice when compared with the control groups. Results of mice immunized with Al(OH) 3 NPS severity of toxicity was less than bulk-Al(OH) 3 . Accordingly, it was concluded that Al adversely affected the brain by histological, immunohistochemical. These alterations are dangerous because of neonatal exposure to aluminum in life. Key word: Al (OH) 3 NPs,BulkAl(OH) 3 ,,Neonatal mice , NF-kb p65,histopathology How to cite this article: Al-Murshedy NAK, Fares BH (2020): Pathological effect of aluminum hydroxide compared with polymer-based nanoparticles on neonatal mice brain, Ann Trop Med &

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“…Owing to the adsorption of OH -, the surface of Al(OH) 3 formed in the 4 m NaOH solution is negatively charged. [59] The free OPA in the electrolyte exists in the form of R-PO 3 2-, with a negative charge, which restricts the agglomeration behavior on flake Al(OH) 3. It is believed that the flake deposits is very helpful for prolonging the discharge time, not easy to block the transmission of OH -, which is conducive to the continuous progress of the discharge process.…”

Section: Effect Of N-octylphosphonic Acid On the Discharge Process An...mentioning

confidence: 99%

Dynamic Locking of Interfacial Side Reaction Sites Promotes Aluminum‐Air Batteries Close to Theoretical Capacity

Huang

Fang

et al. 2021

Advanced Sustainable Systems

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Aluminum metal has been regarded as a promising anode material for aqueous metal‐air batteries. However, the stable cycling of Al anodes is challenging due to the severe parasitic corrosion of Al metal in alkaline electrolytes. Here, a novel additive, n‐octylphosphonic acid (OPA), is introduced into the typical NaOH electrolyte system to improve the interfacial stability of Al anodes and thus promote high‐performance Al‐air batteries (AABs). Combining several experimental characterizations and theoretical calculation, it is proved that OPA molecules in an NaOH aqueous environment can modify the Al anode/electrolyte interface and alter the stacking of the discharge product. The electrolyte engineering is capable of anchoring dynamically to restrain side reactions through hydrogen bonds (H···O), homogenizing the dissolution of Al metal and avoiding precipitation agglomeration. As a proof of concept, AABs full cells with an electrolyte containing OPA achieve higher potential plateau and discharge capacity than those with a pure NaOH electrolyte. It paves a way to develop highly‐efficient and eco‐friendly electrolyte additive strategies for high‐performance AABs devices and advance the current understanding of organic additive mechanisms in AABs.

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Synthesis of Al(OH) ₃ Nanostructures from Al(OH) ₃ Microagglomerates via Dissolution‐Precipitation Route

Cited by 7 publications

References 12 publications

Erosion Corrosion Behavior of Aluminum in Flowing Deionized Water at Various Temperatures

Erosion Corrosion Behavior of Aluminum in Flowing Deionized Water at Various Temperatures

Pathological effect of Aluminium hydroxide compared with polymer-based nanoparticles on neonatal mice brain

Dynamic Locking of Interfacial Side Reaction Sites Promotes Aluminum‐Air Batteries Close to Theoretical Capacity

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Synthesis of Al(OH) 3 Nanostructures from Al(OH) 3 Microagglomerates via Dissolution‐Precipitation Route

Cited by 7 publications

References 12 publications

Erosion Corrosion Behavior of Aluminum in Flowing Deionized Water at Various Temperatures

Erosion Corrosion Behavior of Aluminum in Flowing Deionized Water at Various Temperatures

Pathological effect of Aluminium hydroxide compared with polymer-based nanoparticles on neonatal mice brain

Dynamic Locking of Interfacial Side Reaction Sites Promotes Aluminum‐Air Batteries Close to Theoretical Capacity

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Synthesis of Al(OH) ₃ Nanostructures from Al(OH) ₃ Microagglomerates via Dissolution‐Precipitation Route