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Green synthesis of nanoparticles and its potential application
The applications of copper (Cu) and Cu-based nanoparticles, which are based on the earth-abundant and inexpensive copper metal, have generated a great deal of interest in recent years, especially in the field of catalysis. The possible modification of the chemical and physical properties of these nanoparticles using different synthetic strategies and conditions and/or via postsynthetic chemical treatments has been largely responsible for the rapid growth of interest in these nanomaterials and their applications in catalysis. In addition, the design and development of novel support and/or multimetallic systems (e.g., alloys, etc.) has also made significant contributions to the field. In this comprehensive review, we report different synthetic approaches to Cu and Cu-based nanoparticles (metallic copper, copper oxides, and hybrid copper nanostructures) and copper nanoparticles immobilized into or supported on various support materials (SiO2, magnetic support materials, etc.), along with their applications in catalysis. The synthesis part discusses numerous preparative protocols for Cu and Cu-based nanoparticles, whereas the application sections describe their utility as catalysts, including electrocatalysis, photocatalysis, and gas-phase catalysis. We believe this critical appraisal will provide necessary background information to further advance the applications of Cu-based nanostructured materials in catalysis.
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Synthesis and conductivity of cerium oxide nanoparticles
Xiaoxin Zou was awarded a Ph.D. in inorganic chemistry from Jilin University, China, in June 2011, and then moved to the University of California, Riverside, and then Rutgers, The State University of New Jersey, as a postdoctoral scholar from July 2011 to October 2013. He is currently an associate professor in the State Key Laboratory of Inorganic Synthesis and Preparative Chemistry at Jilin University. His research interests focus on the design and synthesis of noble-metal-free, nanostructured, and/or nanoporous materials for water splitting and renewable energy applications.
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Nowadays nanocrystalline cerium oxide particles are studied due to its various applications. These cerium nanoparticles are used as UV absorbents and filters (). Nanoceria is now extensively used in sensing applications especially in gas sensors () and electrochemical sensors. In electrochemical biosensors the cerium oxide nanoparticles are used as nanointerface to improve the basic characteristics of the sensors such as response time, sensitivity, selectivity, linear response. In these sensors the cerium oxide nanoparticles are used as the interface between the electrode and the biological element. The presence of these nanoceria as interface in these sensors increases the electron transfer rate between the electrode and the recognition element. Hence, the basic characteristics of the sensors improved.
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(2007) SYNTHESIS OF CERIUM OXIDE NANOPARTICLES IN POLYETHYLENE MATRIX
These methods depend on , pressure and the use of capping agents. We have developed a simple and novel method for the synthesis of cerium oxide nanoparticles. The precursor for the production of the cerium oxide nanoparticles by hydroxide mediated method was cerium nitrate and sodium hydroxide. 0.1 M cerium nitrate solution and the 0.3 M NaOH solution was prepared using double distilled water. NaOH solution was added dropwise to the precursor solution for about 2-3 h at room temperature under constant stirring. A pinkish white precipitate was obtained. The precipitate was centrifuged at 8000 rpm for 15 min and the pellet was collected by discarding the supernatant. The pellet was washed several times with distilled water and once with ethanol. The pellet was then dried at 80°C for 1 h in hot air oven and then annealed at 270°C ().
Synthesis of Lithium Doped Cerium Oxide Nanoparticle …
Flow chart for the synthesis of cerium oxide nanoparticles
pattern of cerium oxide nanoparticles: The XRD pattern of CeO2 nanoparticles is shown in . The XRD pattern was scanned from 10-80 degrees with the scan rate 2θ min-1. The XRD profile confirmed the polycrystalline nature of the cerium oxide nanoparticles. The high intensity peaks were observed at 28.53, 33.09, 47.5, 56.26, respective to the 111, 200, 220, 311 crystal planes. The crystal planes were in well accordance with JCPDS No: 34-0394 of CeO2 crystal. The diffraction peaks in these XRD spectra indicates the pure cubic fluorite structure.
protocol for synthesis of aluminium oxide nanoparticles …
A recent study revealed the effective role of cerium oxide nanoparticles in spinal cord damage and some diseases related to the Central Nervous System (CNS) due to . The presence of the cerium nanoparticles increased the life span of the neurons in the spinal cord and in the central nervous system. Because of the wide range of applications of the cerium oxide nanoparticles it was synthesized by hydroxide mediated approach and characterized.