Differences Between Nano Rare Earth Oxides And Rare Earth Elements

Nano-rare earth oxides refer to rare earth oxides with particle sizes up to nanometers, such as nano-cerium oxide and so on. Nano-rare earth oxides in the structure, photoelectric and chemical properties of the attractive features, causing physicists, materials scientists and chemists of great interest. After the concept of nanomaterials in the early 1980s, countries around the world have paid great attention to this material. It has a unique physical and chemical nature that makes people realize that its development may bring new opportunities for research in physics, chemistry, materials, biology, medicine and other disciplines. As the nano-particles surface area, surface active center, so it is an excellent catalytic material. Ordinary iron, cobalt, nickel, palladium, platinum and other metal catalyst made of nano-particles, can greatly improve the catalytic effect. In the petrochemical industry using nano-catalytic materials, can improve the efficiency of the reactor, improve product structure, improve product value, yield and quality.

Rare earth elements are 17 kinds of special elements collectively, it is named because the Swedish scientists in the extraction of rare earth elements when the application of rare earth compounds, so named rare earth elements. However, rare earth is the name left over by history. Rare earth is from the late 18th century began to find, when people often do not dissolve in water as a solid oxide, for example, the alumina called "clay", calcium oxide called "alkaline soil" and so on. Rare earth is generally separated from the state of the oxide, was relatively scarce, hence the name rare earth (Rare Earth, referred to as RE or R). (Ce), praseodymium (Pr), neodymium (Nd), 钷 (Pm), samarium (Sm), europium (Eu), gadolinium (Gd) are the most important elements in the periodic table of chemical elements. (Ti), thulium (Tm), ytterbium (Yb), lutetium (Lu), and elements related to the 15 elements of the lanthanide series, such as terbium (Tb), dysprosium (Dy), holmium (Ho) Yttrium (Y) and scandium (Sc) a total of 17 kinds of elements, known as rare earth elements.

Periodic Ⅲ B family of atomic number 21,39 and 57 ~ 71 of the 17 kinds of chemical elements collectively. The atomic number of 57 ~ 71 of the 15 kinds of chemical elements are collectively referred to as lanthanides.