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Figure 1. Electron differential density map at the interface of the composite: (a) GD-TiO2(001), (b) GR-TiO2(001); (c) Mulliken charge on the surface of GD and GR in the composite
The use of semiconductor photocatalytic oxidation to treat various contaminants is an effective method of environmental management. TiO2 is considered to be the most promising semiconductor photocatalyst; however, its light absorption is limited to the ultraviolet region, and the electrons and holes generated after light irradiation tend to recombine and lose their activity. In order to suppress recombination, in addition to the traditional doping and co-adsorption, carbon material has attracted attention as a good acceptor of electrons, and graphene (GR) has been shown to effectively inhibit recombination. Recently, the carbon family has added a new member, Graphyne (GD), which is a carbene ring conjugated by a 1,3-diyne linkage to form a planar network of all-carbon molecules with a large conjugation system and a broad surface. spacing.
Under the support of the National Natural Science Foundation of China and the National Key Laboratory, the research team of the researcher Wang Dan of the Institute of Process Engineering of the Chinese Academy of Sciences used the hydrothermal method to make TiO2 and GD form a composite material through Ti-OC, showing a higher ratio of pure TiO2 and TiO2-. The superior photocatalytic properties of carbon nanotubes and TiO2-GR composites. At the same time, due to the introduction of C impurity levels, the bandgap width of TiO2 is reduced, so that it exhibits excellent visible light catalytic activity. The results were published in the international journal Small (Small, 2012, 8, 265-271).
Based on past achievements, the team calculated the chemical and electronic properties of the TiO2 and two-dimensional carbon composites using the first-principles method based on the density functional theory. The results show that the TiO2(001)-GD complex is superior to pure TiO2(001) and TiO2(001)-GR composites in electronic structure, charge separation and oxidation ability, and is a promising photocatalyst. The experimental results further verify the theoretical calculation results. In the experiment of photocatalytic degradation of methylene blue, the degradation rate constant of TiO2(001)-GD is 1.63 times that of pure TiO2(001) and 1.27 times that of TiO2(001)-GR. It is of great significance to the design and development of high-efficiency photocatalysts. The results were published in the international journal ACS Nano (ACS Nano, 2013, 7, 1504-1512).
Figure 2. Photocatalytic degradation of methylene blue
Have you ever seen any pcp air pump that can pressurize a gun up to 4500 psi/310bar? ours Pcp Pump can! The guns that usually require a carbon fiber tank to pressurize them can now be filled with a pcp hand pump. One pump for ALL your PCP guns. How convenient is that!
Our pcp hand pump detailed:
Material: Copper, Stainless steel and Aluminum alloy
Maximum Pressure: 4500psi/310bar
With a female foster quick-disconnect on the end of the hose
Body Color: White, black Camouflage Green, or
Size:
- Length closed 630mm;
- Length opened 1100mm
Item Weight: about 3.0kg
Feature of 300bar 4500 psi hand pump:
1. Smooth upward and downwards motion
2. High pressure goes up to 4500psi 300bar
3. Precision pressure gauge for monitoring pressure level
4. High grade 304 stainless steel pump body is much safer
5. All spare parts use advanced CNC technology
6. Bleed valve to prevent oil and water into your equipment
7. Ergonomically designed handle for comfortable use
8. Folding footplate for space saving and easy storage
9. Flexible micro-bore hose for convenient filling
10. Come with O-rings and other complete accessories
11. Comes flat packed with full instructions and tools to assemble
Applications of high pressure air pump:
1.Suitable for any brand of PCP pistols, air rifles and air guns
2. Great for automobile tires, motorcycle tires, bicycle tires, inflatable kayaks, inflatable balls etc.
Advantages of 4500 psi hand pump
1.Small and easy to store
2.Doesn`t need any technical testing
3.Cheaper price compared to carbon fiber tanks
4.Does not break easily, hand pump is generally durable and can last for years
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8.300 bar pump is highly cost effective.
You buy air hand pump once and there is little money to spend for its maintenance
Gives you ultimate control over the pressure level. You can pump the gun and stop at any pressure point that you want. This characteristic alone makes some air gun experts prefer a hand pump over air tanks for their PCP gun rifles.
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