Investigating the Effect of Copper(II) Coordination Compound with Azodicarbonamide Ligand on the Phase‐Stabilization of Ammonium Nitrate

Asgari, Abdoalreza; Ghani, Kamal; Keshavarz, Mohammad Hossein

doi:10.1002/zaac.201700410

Cited by 6 publications

(4 citation statements)

References 31 publications

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“…It has the characteristics of large gas production, long duration, uniform and fine foam formation, and low ash content. 43 Its thermal decomposition temperature is about 210 °C, which well matches the thermal polymerization temperature (250 °C) of the nitrogen-rich molecule precursors, for instance, urea, dicyandiamide, and melamine. By properly adjusting the amount and proportion of AC and precursors, a series of porous g-C 3 N 4 aerosols U/AC x (x represents the molar ratio of AC to urea; x = 0.25, 0.5, and 1; Figure S1) with synergy of bulk nitrogen defects and oxygen doping were prepared by thermal polymerization.…”

Section: ■ Introductionmentioning

confidence: 52%

“…AC is a cheap and low-toxic commercial foaming agent, which is widely applied in various plastics and food foaming. It has the characteristics of large gas production, long duration, uniform and fine foam formation, and low ash content . Its thermal decomposition temperature is about 210 °C, which well matches the thermal polymerization temperature (250 °C) of the nitrogen-rich molecule precursors, for instance, urea, dicyandiamide, and melamine.…”

Section: Introductionmentioning

confidence: 73%

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Foamer-Derived Bulk Nitrogen Defects and Oxygen-Doped Porous Carbon Nitride with Greatly Extended Visible-Light Response and Efficient Photocatalytic Activity

Wang

Zhao

Tan

et al. 2021

ACS Appl. Mater. Interfaces

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Constructing bulk defects and doping are feasible ways to essentially narrow the band gap and improve the light absorption of photocatalysts. Herein, inspired by bread foaming, the foaming agent azoformamide or azodicarbonamide (AC) was introduced during the thermal polymerization of urea. In the polymerization process, a large number of bubbles produced by AC decomposition seriously interfered with the polymerization of urea, resulting in the breaking of the hydrogen bonds and van der Waals interaction in carbon nitride, distortion of its structure, and partial oxidation, thus forming a series of porous carbon nitrides U/AC x (x is the ratio of AC to urea; where x = 0.25, 0.5, and 1) with bulk N defects and O doping. Its band gap was reduced to 1.91 eV and the absorption band edge was greatly extended to 650 nm. The optimal U/AC 0.5 exhibits the highest visible light photocatalytic hydrogen production rate of about 44.7 μmol•h −1 (10 mg catalysts) and shows superior photocatalytic performance for the oxidation of diphenylhydrazine to azobenzene, with conversion and selectivity of almost 100%, and is one of the most active defective carbon nitrides, especially under long-wavelength (λ ≥ 550 nm) light irradiation. It paves the way for the design of highly efficient and wide-spectral-response photocatalysts.

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Section: ■ Introductionmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 73%

Foamer-Derived Bulk Nitrogen Defects and Oxygen-Doped Porous Carbon Nitride with Greatly Extended Visible-Light Response and Efficient Photocatalytic Activity

Wang

Zhao

Tan

et al. 2021

ACS Appl. Mater. Interfaces

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“…The ABS and PC materials contain polymeric additives carrying nitrogen groups, including chemical blowing agents, lubricants, and antistatic agents. For ABS and PC, azoimides such as azodicarbonamide serve as blowing agents and produce IR bands around 3300, 1730, and 1640 cm −1 [28]. The location of similar bands is evident in Figure 5b,c.…”

Section: Acrylonitrile Butadiene Styrene-decabromodiphenylethermentioning

confidence: 82%

Electron Beam Processing as a Promising Tool to Decontaminate Polymers Containing Brominated Flame Retardants

Benmammar,

Mundlapati,

Bouberka

et al. 2023

Molecules

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Electron Beam (EB) irradiation was utilized to decontaminate model systems of industrial polymers that contain a brominated flame retardant (BFR). Acrylonitrile-butadiene-styrene (ABS) and Polycarbonate (PC) are two types of polymers commonly found in Waste Electrical and Electronic Equipment (WEEE). In this study, these polymers were exposed to EB irradiation to degrade DecaBromoDiphenylEther (DBDE), one of the most toxic BFRs. Fourier-transform infrared spectroscopy analysis demonstrated an 87% degradation rate of DBDE for the ABS-DBDE system and 91% for the PC-DBDE system following an 1800 kGy irradiation dose. Thermal analysis using Differential Scanning Calorimetry revealed the presence of crosslinking in ABS and a minor reduction in the glass transition temperature of PC after EB processing. Polymers exhibited thermal stability after photolysis, as indicated by thermogravimetric analysis. In summary, EB irradiation had no impact on the overall thermal properties of both polymers. High-resolution mass spectrometry analysis has confirmed the debromination of both ABS-DBDE and PC-DBDE systems. Therefore, the results obtained are promising and could offer an alternative approach for removing bromine and other additives from plastic E-waste.

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“…The addition of potassium salts is a common method to achieve phase stabilization of AN . Most potassium salts can eliminate the existence of phase transition IV ↔ III when mixed with AN. , Besides, like oxides, organometallic complexes, composites, and cellulose can also inhibit the room-temperature phase transition of AN. In addition to the room-temperature phase transition, the strong moisture absorption of AN is a challenge that needs to be urgently overcome.…”

Section: Introductionmentioning

confidence: 99%

Properties of Mixed Crystal Coprecipitation Substances of Ammonium Nitrate and Potassium Perchlorate Prepared by the Evaporative Solvent Method

Zi,

Han,

et al. 2023

ACS Omega

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Ammonium perchlorate (AP) has been widely used as an oxidizer in propellants and military mixed explosives in recent years. However, its high characteristic signal, environmental pollution, and poor detonation performance have prompted the industry to seek alternatives to AP. Ammonium nitrate (AN) is a suitable substitute due to its low characteristic signal, lack of pollution, and excellent detonation performance. However, its room-temperature phase transition and hygroscopicity affect its practical use. In this work, we prepared mixed crystal coprecipitation (MCC) materials of AN and potassium perchlorate (KP) using the evaporative solvent method. The characterization of AN/KP MCCs was carried out by combining TG-DSC, XRD, FT-IR, and SEM analysis, revealing that the formation of MCCs by AN and KP is due to ion exchange between the two components. AN/KP MCCs not only solve the problem of room-temperature phase transition in AN but also reduce its hygroscopicity. Furthermore, AN/KP MCCs have mechanical sensitivity, explosive performance, and specific impulse similar to pure AN, but compared to AN, AN/KP MCCs have higher density, effective oxygen content, and thermal stability. Compared with existing oxidizers AN, AP, and KP, AN/KP MCCs with high density, low sensitivity, high oxygen content, and high safety have obvious advantages and have good prospects in the application of oxidizers in solid propellants and military mixed explosives.

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Investigating the Effect of Copper(II) Coordination Compound with Azodicarbonamide Ligand on the Phase‐Stabilization of Ammonium Nitrate

Cited by 6 publications

References 31 publications

Foamer-Derived Bulk Nitrogen Defects and Oxygen-Doped Porous Carbon Nitride with Greatly Extended Visible-Light Response and Efficient Photocatalytic Activity

Foamer-Derived Bulk Nitrogen Defects and Oxygen-Doped Porous Carbon Nitride with Greatly Extended Visible-Light Response and Efficient Photocatalytic Activity

Electron Beam Processing as a Promising Tool to Decontaminate Polymers Containing Brominated Flame Retardants

Properties of Mixed Crystal Coprecipitation Substances of Ammonium Nitrate and Potassium Perchlorate Prepared by the Evaporative Solvent Method

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