Browsing by Author "Çalışkan, Melike"
Now showing items 1-19 of 19
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Catalytic activity of palladium doped activated carbon from waste coffee on some environmental pollutants
Karaoğlu, Kaan; Özçifçi, Zehra; Çalışkan, Melike; Baran, Talat; Akçay, Hakkı Türker (Elsevier, 2022)The presence of nitro compounds and such commercial dyes as Congo red, methylene blue, methyl orange and methyl red in water/wastewater causes environmental issues. The treatment of such industrial contaminants, new efficient ... -
Construction and application of MgAl LDH-Schiff base-supported palladium nanocatalyst for Heck reactions and reduction of organic pollutants
Yılmaz Baran, Nuray; Çalışkan, Melike; Baran, Talat (Springer Science and Business Media B.V., 2023)In this study, a novel nanostructured Pd NPs@MgAl LDH-Schiff base-supported catalyst system was developed through a deposition of Pd NPs on the modified MgAl-layered double hydroxide (MgAl LDH). Structural/morphological ... -
Decorated palladium nanoparticles on chitosan/delta-FeOOH microspheres: A highly active and recyclable catalyst for Suzuki coupling reaction and cyanation of aryl halides
Çalışkan, Melike; Baran, Talat (Elsevier, 2021)In this study, an eco-friendly and low cost magnetic nanocomposite consisting of chitosan/delta-FeOOH microspheres (CS/delta-FeOOH) was fabricated as a stabilizer by using a simple method. Pd nanoparticles (Pd NPs) were ... -
Design of a palladium nanocatalyst produced from Schiff base modified dialdehyde cellulose and its application in aryl halide cyanation and reduction of nitroarenes
Çalışkan, Melike; Baran, Talat (Springer Science and Business Media B.V., 2022)In this paper, a versatile heterogeneous catalyst system (Pd-DAC-Sch) based on stabilization of palladium nanoparticles on dialdehyde cellulose Schiff base (DAC-Sch) was developed and characterized thoroughly by a variety ... -
Design of nanostructured palladium catalyst supported by chitosan/Co3O4 microspheres and investigation of its catalytic behavior against synthesis of benzonitriles
Çalışkan, Melike; Baran, Talat (Elsevier B.V., 2021)Designing of eco-friendly, low cost, and thermally stable stabilizing/supporting agents are always desired for production of catalyst systems which provide good catalytic performance in organic reactions. In this study, a ... -
Fabrication of palladium nanocatalyst supported on magnetic eggshell and its catalytic character in the catalytic reduction of nitroarenes in water
Çalışkan, Melike; Akay, Sema; Kayan, Berkant; Baran, Talat (Journal of Organometallic Chemistry, 2021)Aromatic nitro compounds, which have good solubility in water, are highly toxic and non-biodegradable are one of the most important industrial pollutants and have negative effects on human health, aquatic life and the ... -
Facile preparation of nanostructured Pd-Sch-delta-FeOOH particles: A highly effective and easily retrievable catalyst for aryl halide cyanation and p-nitrophenol reduction
Çalışkan, Melike; Baran, Talat; Nasrollahzadeh, Mahmoud (Pergamon-Elsevıer Science, 2021)Iron based compounds are good candidates as supports to immobilize different transition metals due to their eco-friendly nature, capability of facilitating chemical modifications, inexpensiveness, high stability and easy ... -
Facile synthesis of biaryls by palladium nanoparticles adorned on kaolin/NiFe2O4 composite as a magnetically retrievable nanocatalyst
Çalışkan, Melike; Baran, Talat (Elsevier B.V., 2021)The fabrication of catalyst systems with magnetically separable has recently gained much attention because they provide economical and practical advantages in catalytic reactions. In this study, an eco-friendly, inexpensive, ... -
Immobilized palladium nanoparticles on Schiff base functionalized ZnAl layered double hydroxide: A highly stable and retrievable heterogeneous nanocatalyst towards aryl halide cyanations
Çalışkan, Melike; Baran, Talat (Elsevier Ltd, 2022)In this study, a new nanocatalyst system with economical, environmental, moisture, and air-stable features was developed through immobilization of Pd nanoparticles (Pd NPs) on Schiff base-functionalized Zn-Al layered double ... -
Mesoporous chromium oxide doped palladium catalysis for cyanation reaction of some aryl halides
Karaoğlu, Kaan; Akçay, Hakkı Türker; Özçifçi, Zehra; Çalışkan, Melike (Elsevier Ltd, 2021)A Pd/Cr2O3 hybrid catalyst for cyanation reaction of some aryl halides was synthesized and characterized by XRD, SEM/EDS and TEM. The porous structure of the catalyst was also investigated by BET analysis. All XRD ... -
Nanoscaled reusable palladium catalyst supported on chitosan hybrid composite microcapsules reinforced with ZnO nanoparticles for Heck coupling reactions
Çalışkan, Melike; Baran, Talat (Springer Science and Business Media B.V., 2022)In the present work, a novel nanocatalyst system (Pd@CS–ZnO) was developed by adorning palladium nanoparticles on the hybrid nanocomposite consisting of chitosan and ZnO nanoparticles which are designed as a suitable ... -
A new activated carbon-supported Pd–ZnO catalyst for Heck Cross-coupling reactions
Karaoğlu, Kaan; Özçifçi, Zehra; Çalışkan, Melike; Türker Akçay, Hakkı; Baran, Talat (Elsevier B.V., 2023)In this work, to develop catalysts for Heck-type coupling reactions, a hybrid ZnO-Pd nanocatalyst was fabricated on activated carbon sourced from polymer debris. Such techniques as transmission electron microscopy (TEM), ... -
Palladium nanoparticles embedded over chitosan/γMnO2 composite hybrid microspheres as heterogeneous nanocatalyst for effective reduction of nitroarenes and organic dyes in water
Çalışkan, Melike; Baran, Talat (Elsevier B.V., 2022)Effective remediation of toxic organic pollutants such as nitroarenes and dyes from water systems is an important global issue for purification of drinking water or wastewater. Therefore, the development of effective ... -
Pd nanoparticles decorated on Schiff base-modified chitosan/CeO2 as a heterogeneous and retriable nanocatalyst for Heck reactions and remediation of environmental pollutants
Çalışkan, Melike; Güzel, Huri Dilruba; Baran, Talat (Elsevier B.V., 2023)In this paper, we have developed a novel, highly active, eco-friendly, and versatile heterogeneous catalyst system in which Pd nanoparticles are decorated on Schiff base-modified chitosan‑cerium oxide particles (Pd@CS-CeO2). ... -
Pd@MgAl LDH/2-ThCA: A sustainable, active and recyclable nanocatalyst system for the rapid and efficient catalytic reduction of organic pollutants
Yılmaz Baran, Nuray; Çalışkan, Melike; Baran, Talat (Elsevier B.V., 2023)Catalytic reduction of toxic pollutants such as nitroaromatics and organic dyes found in water/wastewater by heterogeneous nano-structured metallic catalysts is a promising method for wastewater treatment. The need for ... -
Preparation and application of a hydrochar-based palladium nanocatalyst for the reduction of nitroarenes
Çalışkan, Melike; Akay, Sema; Kayan, Berkant; Baran, Talat; Kalderis, Dimitrios (MDPI, 2021)In the present study, a novel heterogeneous catalyst was successfully fabricated through the decoration of palladium nanoparticles on the surface of designed Fe3O4-coffee waste composite (Pd-Fe3O4-CWH) for the catalytic ... -
Production of Pd nanoparticles embedded on micro-sized chitosan/graphitic carbon nitride hybrid spheres for treatment of environmental pollutants in aqueous medium
Yılmaz Baran, Nuray; Baran, Talat; Çalışkan, Melike (Elsevier Ltd, 2021)The presence of various organic contaminants such as toxic nitro compounds and dyes in water/wastewater poses a major problem for the environment and human health. Therefore, the treatments of these pollutants are of vital ... -
Schiff bazı içeren Zn-Al tabakalı çift hidroksit üzerinde desteklenmiş yeni bir paladyum nano-katalizörünün sentezi ve katalitik aktivitesinin incelenmesi
Çalışkan, Melike (Aksaray Üniversitesi Fen Bilimleri Enstitüsü, 2022)Bu çalışmada, paladyum nanoparçacıklarının Schiff bazı ile fonksiyonlaştırılmış Zn-Al tabakalı çift hidroksit üzerinde immobilizasyonu ile ekonomik, çevresel, nem ve havaya dayanıklı özelliklere sahip yeni bir nanokatalizör ... -
Supported Pd nanoparticles on micro structured chitosan-MgAl layered double hydroxide hydrogel beads as a sustainable, effective, and recyclable nanocatalyst for Heck cross-coupling reactions
Güzel, Huri Dilruba; Çalışkan, Melike; Baran, Talat (Elsevier Ltd, 2022)In this study, a heterogeneous nano-system with sustainable, green, highly effective, and easily recoverable properties was developed through deposition of palladium nanoparticles on chitosan-MgAl layered double hydroxide ...
