Development Status and Prospect Analysis of Nanometer Titanium Dioxide in China

The preparation and application of nano-TiO2 have been widely carried out in foreign countries, and the results have been achieved. The research on nano-TiO2 in our country formed a climax during the "Ninth Five-Year Plan" period. Shenyang Yongxin Chemical Industry Co., Ltd. uses TiCl4 gas-phase oxyhydrogen flame hydrolysis method to produce nano-TiO2 using its vapor phase white carbon technology. It is understood that almost all the Academy of Sciences and universities that conduct research on nano-powder preparation technology have conducted and conducted nano-TiO2 research. The Department of Applied Chemistry of Chongqing University was the first unit to study nano-TiO2 in China in 1989. The university is a pectin-melting method. Jilin University is also used for the pectin-melting method. East China University of Science and Technology is a gas-phase oxidation method. The sol-gel method is used. Among them are the Institute of Solid State Physics, Chinese Academy of Sciences, East China University of Science and Technology, and Northwestern University. The chemical precipitation method is used by the Shanghai Institute of Ceramics, Chinese Academy of Sciences, Chengdu University of Science and Technology, and Northeastern University. The East China University of Science and Technology and the Chinese Academy of Sciences Shanghai Triacid Research Institute are currently the most comprehensive research units and the most reported units.

At present, there are about 10 domestic companies involved in the production of nano-TiO2, with a total production capacity of more than 1,000 tons. Panzhihua Iron and Steel Group Co., Ltd. Sichuan Iron and Steel Research Institute 200 tons per year production plant is China's advanced equipment, the most complete variety of devices, can produce two series of rutile and anatase four 10 ~ 40mm powder varieties, The tests show that the quality and technical indicators and application performance indicators have reached the international advanced level and the domestic leading level, which will change the status of China's dependence on nano-TiO2 imports; Anhui Anhui Nanotechnology Co., Ltd., jointly established by Hualing North Luling Coal Mine and Tengling Industry and Trade Co., Ltd. The company has invested 50 million yuan and has built an annual output of 500 tons. The first nano-materials laboratory of Qingdao University of Science and Technology and the Haier Group have jointly developed the first production line with a production capacity of 100 tons and has successfully completed a trial run; Jinan Yuxing Chemical Plant has selected nano TiO2 production lines, has passed provincial technical appraisal, has an annual production capacity of 100 tons, can provide nano-titanium, rutile powder and slurry a total of 4 varieties, a variety of specifications Products; Chinese Academy of Sciences Taixing Nanomaterials Factory is in industrial production, and is about to build an annual output of 500 Nano-TiO2 production line; In addition, Sichuan Yonglu Technology Co., Ltd. Zhejiang Zhoushan tomorrow Nano, Jiangsu Wuling Chang Tai Nami Material Co., Ltd., Hebei Maoyuan Chemical Co., Ltd. nano-TiO2 system has also been built.

In addition, in China's application of nano-TiO2, a self-cleaning glass developed by Shanghai Fudan University has a TiO2 catalytic film on the surface of the glass. Even if it is exposed to the air for a long time, it will not easily accumulate dust. If it is stained with oil, it is also Can be decomposed by it clean. The service life of this self-cleaning glass is expected to be more than 10 years, and the price is almost the same as ordinary glass.

The research and production of nano TiO2 in China have the following characteristics: 1 The research on nano TiO2 is extensive, involving a wide range, scattered power, low level of repeated research phenomenon is serious, and the intensity of enterprise intervention is not enough; 2 The development of nano TiO2 preparation technology is focused on , The application of nano-TiO2 technology is less developed, especially the key technologies related to the application have no breakthrough progress; 3 The capacity of project development is weak, because the general investment of nano-TiO2 project is relatively small, and some large engineering companies design institutes for engineering. Little interest, not willing to invest manpower and material resources for project development; 4 small-scale production, the basic use of wet process, soil method launched, poor product quality, the existing market space is small, does not bring imaginary high profits to the enterprise At present, the market price of nano-TiO2 in China is roughly 70,000 to 420,000 yuan/ton, because the difference in crystal shape, quality, and origin is quite large, and the domestic product price is 70,000 to 24, 000 yuan/ton. The ordinary rutile titanium dioxide is only 14,000 to 21,000 yuan / ton, its added value is still high, the future prospects for the development of nano-TiO2 is still considerable.

China's AQSIQ and the National Standardization Administration Committee have jointly issued seven national standards for nanomaterials, including the "Nanomaterial Terminology."

There is a term standard, two detection method standards, and four product standards. This is the first time in the world that nanometer standards have been promulgated in the form of national standards, which indicates that China's nanomaterials standardization work has been at the forefront of the world. Since April 1, 2005, companies must comply with Fengguan standards in the production and promotion of nano-products, and will be punished if they violate regulations. The publication and implementation of "Nanomaterials Terms" has very important practical significance. It will certainly play a positive role in regulating the nanomaterials market, supporting the application of high-tech products, and promoting the healthy and rapid development of China's nanomaterials industry. It is reported that after the release of these standards, it will also establish a system of market access and technical standards for nanomaterials, and through the effective implementation of standards, regulate the market order of nanomaterials in China.