Patented method for the preparation of copper-titanium dioxide core-shell nanoparticles

In recent years, core-shell structured nanoparticles composed of precious metals and titanium dioxide have attracted significant attention in the scientific community. These structures leverage the unique properties of noble metals as the core, which can modify the energy band structure of the surrounding titanium dioxide semiconductor. This modification enables the material to absorb visible light more effectively. Additionally, when noble metal particles come into contact with titanium dioxide, electrons migrate between the two surfaces, leading to a buildup of negative charge on the metal surface and an excess of positive holes in the semiconductor. This separation of charges prevents the recombination of photogenerated electron-hole pairs, thereby enhancing the efficiency of charge transfer and photocatalytic performance. Researchers at the Institute of Physical and Chemical Technology, Chinese Academy of Sciences, have developed a novel method for preparing copper-titanium dioxide core-shell nanoparticles. The process involves dissolving cuprous chloride in ammonia water, followed by the addition of polyethylene glycol aqueous solution, sodium citrate, ascorbic acid, tetrabutyl titanate (in absolute ethanol), and urea. The mixture is stirred at room temperature and then placed in a PTFE-lined stainless steel hydrothermal reactor. By carefully controlling the reaction temperature and time, near-spherical core-shell nanoparticles are successfully synthesized. In this method, ascorbic acid functions as a reducing agent, converting monovalent copper ions into metallic copper, while polyethylene glycol acts as a soft template that helps control the morphology and size distribution of the nanoparticles. The resulting copper-titanium dioxide core-shell nanoparticles exhibit uniform size and controllable particle dimensions. The outer layer consists of anatase-type titanium dioxide, while the inner core is made of metallic copper. These nanoparticles show great potential as electrode materials and photocatalysts in dye-sensitized solar cells. This innovative preparation method has been granted a national invention patent on May 2nd, with the patent number ZL 201110258150.9. The process is not only simple and environmentally friendly but also cost-effective, making it a promising approach for large-scale production and practical applications in renewable energy and environmental technologies.

Swing Door

1.with 3000 square meter factory about 35 workshop workers and 25 office workers.

2.More than 20 sets of advanced machines with more than ten years domestic trade experience and international trade experience.

3.Manufacture and supply good quality automatic doors

4.With ISO 9001 Certification and many others certifications

5. Excellent DC brushless motor , high wear-resistant qualities wheels and reasonable structure design makes it more stable, quiet, longer life

6.Our Service system is perfect

Controller Dimensions : 85×124×600mm

Weight :12 kg

Maximun leaf weight :150 kg

Open range : 70°~115°

Closing speed : 10~43 cm/s

Door hold time :0.5~10 seconds

Main Power :AC 220V~250V,50~60 Hz

Maximum current :1A

Maximun motor power:55W

Wait Power :14W

Fuse :Minimum 3.5 ASlow

Operating Temperature : -30℃ ~+50℃

Swing Door,Exterior Swing Door,Aluminium Out Swing Door,Refrigerated Swing Door

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hongfadoor.com