Carbon dioxide, as the main greenhouse gas, has accumulated in the atmosphere at an alarming rate over the past several decades, which is the main cause of global warming. Therefore, the elimination and conversion of carbon dioxide has become the key to solving environmental problems.
Compared with the traditional industrial method of chemically absorbing carbon dioxide with ammonia, the use of photocatalytic means to convert carbon dioxide into organic materials that can be used is a cost-effective and environmentally-friendly method. In this process, the light-functioning catalytic materials play a role. A decisive role.
However, at present, photocatalysts for the reduction of carbon dioxide, whether they are heterogeneous catalysts represented by inorganic semiconductor materials or homogeneous catalysts represented by metal organic compounds, have certain defects, such as a narrow range of light absorption and are difficult to recover. Reuse, etc. Therefore, it is of great significance to explore new types of carbon dioxide reduced photocatalytic functional materials.
Under the support of the National Youth Foundation’s Outstanding Youth Fund and the “973†Major Research Project of the Ministry of Science and Technology, the Luo Junhua Research Group of the Key Laboratory of Optoelectronic Materials Chemistry and Physics of the Fujian Institute of Materials Structure, Chinese Academy of Sciences utilizes the photoactive motif Ir(ppy). 2 (Hdcbpy) coordination reaction with rare earth ions, successfully obtained a dual-function coordination polymer (CP) material (Y[Ir(ppy)2(dcbpy)]2[OH which has both strong light absorption and excellent photocatalytic activity. (Ir-CP)), and for the first time applied such photofunctional coordination polymer materials for the photocatalytic reduction of carbon dioxide, the compound exhibits a very strong visible light absorption capability (absorption edge reaches 650 nm) and a long time. The fluorescence lifetime (29.05 μs) is nearly 4 times longer than the fluorescence lifetime of the Ir motif, and the long excited state lifetime favors its catalysis.
Based on these advantages, Ir-CP exhibits outstanding photocatalytic CO2 reduction capabilities with a catalytic conversion rate (TOF) of 118.8 μmol (g of Cat.)-1 h-1 and a catalytic quantum yield of 1.2%. At the same time, Ir-CP has a one-dimensional [Y(OH)2(CO2)2]∞ chain structure, which greatly enhances the stability of the compound. The results of photocatalytic recycling show that Ir-CP light function is utilized. The material was subjected to multiple catalytic cycle experiments without significant changes in catalytic efficiency. The relevant research results were published in the Chemical Society of the Royal Society of Chemistry (Chem. Sci., 2014, doi: 10.1039/C4SC00940A).
Previously, the research group has made important progress in the research of molecular-based photonic crystal materials, especially polar molecular photoelectric functional crystal materials. See J. Am. Chem. Soc., 2014, doi: 10.1021/ja504319x; Nat. Comm. ., 2014, 5:4019 doi: 10.1038/ncomms5019;Adv. Mater., 2013, 25, 4159; Adv. Funct. Mater., 2012, 22, 4855; Angew. Chem. Int. Ed., 2012, 51, 3871 and so on.
One of the teapots worth mentioning is the long mouth teapot, which is commonly used in tea ceremony performances.
The long beaked teapots we saw for the performance are mostly bronze, and some are made of iron and tin, also known as the long spouted teapots. A tea maker with no flow is called a no flow pot, which can also be slightly raised; Short flow kettle --- a teapot with the spout water outlet separated from the chamber within three inches; Medium flow kettle --- the distance from the water outlet to the kettle chamber is about three inches to two feet; The teapot whose spout is more than two feet away from the pot cavity is called a long flow pot. In ancient times, the spout of Changliu Pot was usually three feet long, which is why the commonly known "one meter long pot" came into being.
Teapot Set,Teapot Set Argos,Teapot Set Arita,Asian Teapot Set
The universe in the stone is great , https://www.zdsarts.com