Mehdi Hosseini; Saeedeh Shakibafar; Tayebeh Saki
Abstract
An environmentally friendly and safe method has been developed for synthesizing Azoarene and Azoxyarene derivatives from readily available nitrobenzene. This process utilizes a deep eutectic solvent (DES) composed of choline chloride (ChCl) and zinc chloride (ZnCl2), which functions as both the catalyst ...
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An environmentally friendly and safe method has been developed for synthesizing Azoarene and Azoxyarene derivatives from readily available nitrobenzene. This process utilizes a deep eutectic solvent (DES) composed of choline chloride (ChCl) and zinc chloride (ZnCl2), which functions as both the catalyst and reaction medium. The methodology is leveraging the dual role of the ChCl/ZnCl2 DES. Using this approach, various Azo and Azoxy compounds have been successfully synthesized starting from nitrobenzene derivatives. The reaction proceeded efficiently under mild conditions (3 h at 60 °C). Notably, the system exhibited strong selectivity toward Azoxy products, which were obtained in high yields of 73-78%. In contrast, Azo derivatives were formed only in moderate yield (42%), highlighting the selective nature of the ChCl/ZnCl2 DES catalytic medium. This method not only simplifies the synthesis but also aligns with the principles of green chemistry, offering an efficient and sustainable approach to producing Azoarene and Azoxyarene derivatives.
Mostafa Khoshtabkh; Mahdi Nobahari; Seyed Mojtaba Movahedifar; Amin Honarbakhsh; Rahele Zhiani
Abstract
Nd2Sn2O7 nanoceramic was synthesized using an eco-friendly method with SnCl4•5H2O and Nd(NO3)3•6H2O. Structural analysis confirmed the formation of Nd2Sn2O7 nanoceramic with a size of 20±8 nm. Nd2Sn2O7 was thoroughly characterized using SEM, XRD, TGA, EDX, and TEM techniques. Due to ...
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Nd2Sn2O7 nanoceramic was synthesized using an eco-friendly method with SnCl4•5H2O and Nd(NO3)3•6H2O. Structural analysis confirmed the formation of Nd2Sn2O7 nanoceramic with a size of 20±8 nm. Nd2Sn2O7 was thoroughly characterized using SEM, XRD, TGA, EDX, and TEM techniques. Due to its high mechanical and long-term colloidal stability, large ionic character, and thermal stability, this system is considered an ideal nanocatalyst employing the host-guest approach. This green and environmentally friendly method was tested for the reduction of nitro-aromatic compounds using the synthesized Nd2Sn2O7 nanoceramic. The catalyst demonstrated easy and effective reusability after the reaction was completed under visible light irradiation.
Masoud Kouchakzadeh; Amin Honarbakhsh; Seyed Mojtaba Movahedifar; Rahele Zhiani; Farhad Hajian; Seyed Mohsen Sadeghzadeh
Abstract
The photocatalytic degradation of organic dye residues offers a promising and eco-friendly solution to challenges that endanger living organisms. A highly efficient fibrous nanocatalyst was carefully fabricated, designed, and utilized to remove acid black 1, acid blue 92, acid brown 214, and acid violet ...
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The photocatalytic degradation of organic dye residues offers a promising and eco-friendly solution to challenges that endanger living organisms. A highly efficient fibrous nanocatalyst was carefully fabricated, designed, and utilized to remove acid black 1, acid blue 92, acid brown 214, and acid violet 7 [Wastewater colors]. The findings indicated that the amount of Gd2ZnMnO6/ZnO quantum dots affects the degradation efficiency. Integrating quantum dots into the photocatalyst structure boosts light absorption, accelerates electron transfer rates, and enhances charge transfer efficiency. The catalyst's performance was assessed by considering various catalyst components for the removal of organic wastes. The study proposed rational procedures based on the interaction between Gd2ZnMnO6 and ZnO nanoparticles within the catalyst, which can be reused and recovered for at least 10 cycles without significant loss of reactivity.
Farzaneh Shamsa; Alireza Motavalizadehkakhky; Rahele Zhiani; Jamshid Mehrzad; Malihe Sadat Hosseiny
Abstract
Microorganisms create metal nanoparticles (MNPs) after being exposed to toxic metal ions. Nevertheless, the catalytic performance of biosynthesized MNPs has not been investigated in spite of the possibility of utilizing these biological processes in the stable improvement of vital metals (e.g. zinc oxide). ...
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Microorganisms create metal nanoparticles (MNPs) after being exposed to toxic metal ions. Nevertheless, the catalytic performance of biosynthesized MNPs has not been investigated in spite of the possibility of utilizing these biological processes in the stable improvement of vital metals (e.g. zinc oxide). This strategy has excellent advantages like high economic efficiency and tolerance of functional groups. DaZnO NPs characteristics were recognized by numerous techniques, including FT-IR, SEM, TEM, XRD, and EDS analyses. In this study, biogenic zinc oxide nanoparticles were produced by the Desulfovibrio alaskensis to reduce carbon dioxide for the preparation of formate salts in an aqueous medium.
Seyed Mohsen Sadeghzadeh; Rahele Zhiani; Ali Es-haghi
Abstract
Food waste is one of the main issues for international organisms. It is not only an ethical and economic issue but it also depletes the environment of limited natural resources. Among strategies suitable for fighting such challenge, intelligent packaging is an interesting tool to reduce waste derived ...
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Food waste is one of the main issues for international organisms. It is not only an ethical and economic issue but it also depletes the environment of limited natural resources. Among strategies suitable for fighting such challenge, intelligent packaging is an interesting tool to reduce waste derived from households and retailers. Colorimetric detection of biogenic amines, well-known criterions of food corruption, shows the main role for monitoring of food safety. A novel colorimetric sensor based on hydrolysis-induced mercury metallization reaction to tune the localized surface plasmon resonance (LSPR) adsorption of Au nanoparticles sensitive to total volatile basic nitrogen (TVBN) released from meat has been created for real-time supervision of meat quality. Sensors were kept in atmosphere of ammonia simulating which changed its colour with changing of pH. This is the case of highly volatile amines, produced in food spoilage, specifically in the deterioration of meat, for which the color development of the smart labels can be used as a visual test for food freshness.
Maryam Malekzadeh; Faeze Daneshfar; Seyed Mohsen Sadeghzadeh
Volume 1, Issue 2 , September 2014, , Pages 72-77
Abstract
Nano SiO2/hyperbranched polyglycerol (HPG)/SO3H catalyst was readily prepared for first time from inexpensive starting materials in aqueous media which catalyzed the synthesis of benzoic acid. FTIR spectra, X-ray diffraction (XRD) and transmission electron micrographs (TEM) was employed to characterize ...
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Nano SiO2/hyperbranched polyglycerol (HPG)/SO3H catalyst was readily prepared for first time from inexpensive starting materials in aqueous media which catalyzed the synthesis of benzoic acid. FTIR spectra, X-ray diffraction (XRD) and transmission electron micrographs (TEM) was employed to characterize the properties of the synthesized nano SiO2/HPG/SO3H. High catalytic activity and ease of recovery from the reaction mixture using filtration and several reuse times without significant losses in performance are additional eco-friendly attributes of this catalytic system.
