Cement foaming agent, also known as foaming concrete foaming agent, refers to an admixture that can reduce the surface tension of liquid and generate a large amount of uniform and stable foam for the production of foamed concrete. Foaming agent is a kind of substance that can make its aqueous...
Algae Extracts Controllable Synthesis of Vanadium Carbide Nanosheets with Enhanced Photothermal Performance in the Near Infrared Region
What is Vanadium Carbide?
Vanadium Carbideis an opaque black crystal that has a density between 5.255.4g/cm3 with a melting point around 2750. This is a little harder than quartz. This substance can be used to make vanadium steel, and it is also used as a carbide cemented carburide additive.
The Discovery of Two Dimensional Vanadium-Carbide Nanosheets
Vanadium-carbide nanosheets with a two-dimensional structure have definite potential for use as photothermal agents in the treatment of cancer. The application of vanadium in photothermal therapies is limited by harsh synthesis and low photothermal efficiency. The research team recently reported a green intercalation method that uses algae extracts for high-yielding two-dimensional vanadium-carbide nanosheets.
Recent years, two-dimensional transitional metal carbonitride has been used in a variety of fields, including energy storage, biosensors, biomedicine, and many others, because it is superior for metal conductivity. Its hydrophobicity and various components, as well, as its nanostructures have made them useful. Broad application prospects.
Preparation and Characterization of Two-dimensional Transition Metal compounds
The Mn+1AXn layered structure is used to prepare the carbonitride of two-dimensional metal transition. In this ternary, "M" represents the transition metal and "A", mainly, the IIIA group or IVA Group (13 or 14,) element. "X", is C or n (n = 1, 2, or 3). MAX is a hexagonal layer crystal structure composed of metal MX and A bonds. The A element "bonds" between adjacent layers Mn+1Xn. Due to the Mn+1Xn's weaker M-A bonds, it is possible to selectively remove the A layer with a corrosive alkali or strong acid. The harsh conditions of these methods, the low yield and the damage to the structure of Mn+1Xn on a single layer limit their use at large scale. It is therefore urgent to develop a method that is efficient, environmental friendly and yields high to understand such materials better and to broaden their applications.
The Future of Vanadium-Carbide Nanosheets
The team of researchers proposed a method to solve the above problems by using algae extracts in order to produce high-yielding two-dimensional nanosheets vanadium carbide by intercalation. This method yields vanadium carbonitride nanosheets that have a complete structural structure and a high absorption near-infrared. The photothermal convertibility at 808 nm reaches up to 48 %, which is superior to other two-dimensional transitional metal carbonitride materials such as Mo2C (42.9%) and Nb2C(36.4% NIR-I and 45.65% in NIR-2), as well as Ta4C3 (44.7%). This efficiency is comparable to that of gold-based material and carbon-based Nanomaterials. Both in vitro and in vivo tests show that the two-dimensional vanadium-carbide nanosheets could be used for photothermal treatment of cancer guided by photoacoustic or magnetic resonance multimode imaging. This work eliminates the harsh conditions associated with the use of strong corrosive alkalis or acids, while providing an economic, environmentally-friendly, high-yield and high-yield way to prepare two dimensional transition metal carbitrides.
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