Publicity about the participation of our company in the 2019 Annual Scientific Research Outstanding Achievement Award (Science and Technology) Project

　　Project Name：Preparation, Functionalization and Application Technology of High Performance Attapulgite/TiO2 Composites

　　Recommended by：Changzhou University

　　Project Description：　　

　　The attapulgite, also known as palygorskite or palygorskite, is an aqueous magnesium-rich aluminosilicate clay mineral with attapulgite as the main component. Due to the unique rod-shaped morphology and pore structure of attapulgite, it is currently It has been applied in many ways. The attapulgite clay mine in Jiangsu has a proven reserves of 48% of the world's total, and 74% of the total domestic market. At present, there are more than 30 enterprises, forming a characteristic industry, but the added value of the products is relatively low, the products are sold. The price is lower than 1,500 yuan / ton. Titanium dioxide has three crystal forms such as anatase, rutile and brookite. The former two are tetragonal and the latter are orthorhombic. Among them, anatase and rutile are the most useful and studied. Crystal form. Generally, the liquid phase method firstly prepares an amorphous structure of a titanium oxide precursor, which is then heat-treated at 300 to 500 ° C to be converted into an anatase structure, and finally subjected to high temperature calcination at a temperature of 700 ° C or higher to obtain rutile after phase transformation. Structure of nano-TiO2. Due to its large particle size, specific surface area and high surface energy, nano-titanium dioxide easily agglomerates into larger particles and affects its excellent nano-performance. The project aims at high-quality utilization of attapulgite clay resources, and uniformly and firmly supports different crystal forms and different morphologies of titanium dioxide nanoparticles on the surface of attapulgite single crystal to form attapulgite/titanium dioxide nanocomposites. On the basis of this key technology, the composite material was further functionalized and modified, and finally the attapulgite-based titanium photocatalyst, Cu2O/TiO2/attapulgite adsorption desulfurizer, ZnO/TiO2/attapulgite full-wavelength were formed. UV shielding materials and polyaniline / TiO2 / attapulgite conductive materials and other products, and successfully achieved industrialization. Its main technical contents include:

1. The negative electric property of the surface of the attapulgite is used to induce the hydrolysis of the titanium salt, and the high-activity anatase nano-TiO2 is grown in situ on the surface of the attapulgite core. Nano-TiO2 can effectively promote the reduction of Cu2+ by alcohol under the illumination of sunlight, so that nano-Cu2O can be deposited on the surface of nano-TiO2/attapulgite composite carrier with high dispersion. The Cu2O/TiO2/attapulgite composite material has the dual functions of physical adsorption of attapulgite and chemical adsorption of Cu2O, and synergistic adsorption of thiophene sulfur compounds in oil.

The self-assembly of attapulgite and hydrolysate rutile nano-TiO2 was realized by low temperature crystallization method using the silicon hydroxyl group and residual bond on the surface of the attapulgite bar to induce the hydrolysis of positively charged titanium ions. The formation mechanism of rutile nano-TiO2 was revealed, and a rutile nano-TiO2/attapulgite UV spacer material with excellent dispersibility and reinforcing properties was obtained. Based on this research, the UV shielding range of the composite was broadened by composite nano-ZnO particles, and a ZnO/TiO2/attapulgite UV barrier material with full-band UV (UVA and UVB) shielding properties was obtained. The product has been successfully developed. Used in industries such as coatings and cosmetics.

3. The nano-TiO2 core body on the surface of the attapulgite rod crystal is used as a chelating agent, and sulfuric acid is chelated on the surface of the nano-TiO2 to form a solid acid dopant. The nano-TiO2/attapulgite as the core is used to construct a polyaniline conductive layer on the surface of the core by in-situ oxidative polymerization to impart a conductive function to the attapulgite. The invention solves the problems that the traditional process causes a large amount of doping acid depletion and acid waste water when the product is washed. The material has been successfully applied in the conductive and antistatic coatings, and has the advantages of less dosage, good electrical conductivity and strong oxidation resistance.

4. This project makes full use of the unique properties of attapulgite adsorption, colloidality and salt resistance. The attapulgite single crystal is used as the carrier, and the high-activity mixed crystal nano-TiO2 and magnetic Fe3O4 are simultaneously loaded on the surface, and then The polyaniline was assembled in situ on the surface of TiO2 to develop a recoverable, low-cost, high catalytic activity attapulgite-based photocatalytic material, which was successfully used in the treatment of salty organic wastewater. The project has formed a key core technology with independent intellectual property rights, and is authorized to invent the patent ````. Published papers··· articles. The results of the project have been promoted and applied in 8 enterprises. Since the implementation of the project, the economic and social benefits have been significant, and the products have been highly recognized by well-known customers at home and abroad. Accumulated new profits of 320 million yuan, new tax revenue of 150 million yuan, savings of 34 million yuan.