Current Microwave Chemistry - Online First
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A Comprehensive Review on Current Microwave Chemistry
Authors: Krishna Chandra Panda, B.V.V. Ravi Kumar, Sruti Jammula and Biswa Mohan SahooAvailable online: 17 July 2025More LessBackgroundMicrowave technology is widely used in chemical synthesis and offers unique opportunities that are unachievable with the use of conventional methods of heating. This study aims to review the background, methods, and development in microwave-assisted chemistry and advances with a focus on its increasing relevance in various disciplines. Microwave chemistry promises to greatly decrease the time to complete a reaction from hours to minutes, and increase yield and purity all at once.
MethodsThe rationale for this approach is based on specific patterns in communication, for example, dipolar polarization and ionic mobility that distinguish the effective transfer of energy to molecular systems. Details of these principles are explored and related to synthetic organic chemistry, materials chemistry, and green chemistry. The assessment of microwave-supported processes demonstrates advances in the preparation of heterocycles, medicinal chemistry, and polymer chemistry.
ResultsThese refined works not only increase the reaction efficiency but also do all this with the help of excluding hazardous reagents for the environment, which is a great idea concerning Sustainable Chemistry. Subsequent advancements of hybrid reactors and the utilization of real-time monitoring enhance the adaptability of microwave technology. Microwave synthetic chemistry in the present context involves nanotechnology and catalysis for the production of multifunctional materials and nanoscale particles. Furthermore, the paper discusses directions in environmental applications, including pollutant degradation and renewable energy systems, so as to demonstrate that the technology is relevant to fighting global issues. However, microwave chemistry comes with certain limitations such as scalability, the problem of non-uniform heating, and the long-term costs of purchasing exotic microwave equipment.
ConclusionThis research also presents a detailed description of these limitations and offers remedies as discussed by creating adaptive microwave systems for system and computational models for reaction optimization. Finally, this work closes with a discussion of potential perspectives for microwave chemistry, ranging from the concept of interdisciplinary approaches and the inclusion of artificial intelligence in reaction design and process monitoring. Because of its revolutionary capability, microwave chemistry is on the verge of revolutionizing the chemical industry.
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Facile Synthesis and Electrochemical Characterization of Pt and Pt-based Electrocatalysts Supported on Reduced Graphene Oxide
Authors: Kun-Yauh Shih, Ming-Chi Tsai and Zhu-Min ChenAvailable online: 16 July 2025More LessIntroduction/ObjectiveThe preparation of PtNiCo/reduced graphene oxide (RGO) nanocatalysts with excellent activity and stability using a facile, microwave-assisted, and cost-effective synthetic method is crucial for the commercial application of fuel cells and clean energy technologies. This study examines the impact of varying metal ratios on the catalytic properties of PtNiCo/RGO and compares them with those of Pt/RGO.
MethodsPtNiCo/RGO nanocatalysts were synthesized via a microwave-assisted hydrothermal method using ethylene glycol as the solvent. Different metal precursor ratios were used to prepare PtNiCo/RGO-1, -2, and -3. The physical and electrochemical characteristics of the synthesized catalysts were analyzed using transmission electron microscopy (TEM), X-ray diffraction (XRD), and various electrochemical tests.
ResultsAmong the synthesized samples, PtNiCo/RGO-3 demonstrated the best performance, with an electrochemical surface area (ECSA) of 82.61 m2/g, 2.7 times higher than that of Pt/RGO (30.39 m2/g). It also exhibited a lower CO oxidation potential and better stability during electrochemical methanol oxidation. TEM analysis confirmed a thin nanoparticle morphology with average diameters of 2–5 nm.
DiscussionThe enhanced performance of PtNiCo/RGO-3 is attributed to the synergistic effects among Pt, Ni, Co, and the RGO support. These interactions improved electron transfer, dispersion, and resistance to catalyst poisoning.
ConclusionPtNiCo/RGO-3 demonstrates excellent catalytic activity, anti-poisoning characteristics, and durability, making it a promising electrocatalyst for fuel cells and hydrogen production. This work supports the development of cost-effective and efficient clean energy technologies, aligning with the United Nations Sustainable Development Goal 7 (Affordable and Clean Energy).
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Carbon Quantum Dots: Green Catalysts for Organic Synthesis
Authors: Shubhrat Maheshwari, Amita Verma and Aditya SinghAvailable online: 19 March 2025More LessCarbon quantum dots (CQDs) have emerged as a promising class of nanomaterials, distinguished by their unique optical and electronic properties, making them ideal candidates for catalyzing various organic synthesis reactions. This review provides a comprehensive overview of recent advancements in the application of CQDs as catalysts in organic transformations, with a focus on their synthesis, functionalization, and mechanisms of action. CQDs, also referred to as carbon dots (CQDs), are innovative zero-dimensional fluorescent carbon-based nanomaterials that have garnered significant global interest. The advantages of CQDs over traditional catalysts are noteworthy. They possess a high surface area, which facilitates increased interaction with reactants, and their surface chemistry can be easily tuned to optimize catalytic performance. Additionally, CQDs exhibit excellent stability under a wide range of reaction conditions, ensuring consistent catalytic activity. Their biocompatibility and low toxicity further enhance their appeal, positioning them as environmentally friendly and sustainable alternatives in chemistry. Due to their catalytic applications, CQDs are recognized for their remarkable optical properties, including strong fluorescence and water solubility, which allow them to be utilized in diverse fields, such as bioimaging, biosensing, and chemical sensing. Their eco-friendliness and simple synthesis methods make CQDs attractive for applications in nanomedicine, solar cells, drug delivery systems, and light-emitting diodes. The combination of these favorable characteristics positions CQDs as promising candidates for advancing technology across multiple domains, especially in medical and environmental applications. As research continues to uncover new functionalities and applications of CQDs, their role in catalysis and other fields is expected to expand, paving the way for innovative solutions to pressing challenges in organic synthesis and beyond.
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