[Background and Overview][1][2][3]
Zirconium(IV) hydrogen phosphate (Zr(HPO4)2) is widely used in industrial production. It has strong acid resistance and certain alkali resistance, large specific surface area and surface charge, and good Ion exchange properties. Compared with granular (powder) zirconium hydrogen phosphate, needle-like zirconium hydrogen phosphate has a larger specific surface area and better ion exchange and proton exchange capabilities, which can greatly improve its own catalytic efficiency or its other The catalyst contained therein has high efficiency and can effectively remove harmful substances in radioactive nuclear waste and sewage treatment. Zirconium hydrogen phosphate has a molecular weight of 283.18300, CAS 13772-29-7, and a boiling point of 158ºC at 760mmHg. If inhaled, move the patient to fresh air; in case of skin contact, take off contaminated clothing, rinse the skin thoroughly with soap and water, and seek medical attention if you feel uncomfortable; if eye contact occurs, separate the eyelids and rinse with fluid Rinse with water or saline and seek medical attention immediately. If ingested, rinse mouth immediately. Do not induce vomiting and seek medical attention immediately. Advice to protect rescuers is as follows: Move the patient to a safe place, consult a doctor, and if conditions permit, please show this chemical safety data sheet to the doctor who comes to the scene. If there is a small leak, collect the leaked liquid in a sealable container as much as possible, absorb it with sand, activated carbon or other inert materials, and transfer it to a safe place. Do not flush it into the sewer; if there is a large leak, build a dike or dig a pit. Contain, seal the drainage pipe, cover it with foam to inhibit evaporation, use an explosion-proof pump to transfer it to a tanker or a special collector, and recycle or transport it to a waste treatment site for disposal.
【Preparation】[1]
A simple method to efficiently prepare needle-like zirconium hydrogen phosphate (Zr(HPO4)2) using the following steps:
1) Prepare a solution with a phosphoric acid solution with a concentration of 80 wt%, ammonia with a concentration of 30 wt% and distilled water in a volume ratio of 4:3:5; then add zirconium oxychloride and urea to the solution , where the molar ratio of zirconium oxychloride, phosphoric acid and urea is: 1:2:6~8;
2) Add linear octylphenol polyvinyl ammonium nitrate, polyvinylpyrrolidone, and cetyl ethyl morpholinoethyl ammonium sulfate into the solution, and control the linear octylphenol polyvinyl ammonium nitrate, polyvinylpyrrolidone, The addition amounts of cetyl ethyl morpholinoethyl ammonium sulfate are 0.1%, 0.05%, and 0.1% of the solution mass respectively;
3) Heat the solution to 98 ℃ and stir continuously for 3 to 6 hours with a stirrer; after stirring, cool the solution to room temperature naturally, then stand still and age for 5 hours, then filter, separate, and wash with distilled water The product was dried three times and then dried at 110°C for 3 hours to prepare needle-like zirconium hydrogen phosphate with complete crystallization.
[Application][2][3]
Zirconium (IV) hydrogen phosphate can be used as an analytical reagent, a coagulant, and a carrier for radioactive phosphorus. Application examples are as follows:
1. Used to prepare a graphene/zirconium hydrogen phosphate composite material. As a negative electrode material for lithium batteries, the composite material can overcome the problems of poor battery conductivity and serious volume expansion effect, and has strong cycle stability and conductivity. Strong characteristics. Since graphene has high conductivity and large specific surface area, it can effectively improve the conductivity of battery composite materials. At the same time, the coating of graphene can effectively improve the volume expansion effect of battery composite materials and improve the electrochemical performance of battery composite materials. This method It has the characteristics of simple operation, high repeatability and low cost. The preparation method specifically includes the following steps:
1) Add 0.0080-0.0800g of graphene oxide to 80ml of solvent, put the mixture into an ultrasonic cleaner with an ultrasonic frequency of 40kHz and conduct ultrasonic treatment for 0.5-3h to obtain a graphene oxide dispersion;
2) Add 0.0020-0.3000g of zirconium hydrogen phosphate into the graphene oxide dispersion prepared in step 1) and stir evenly;
3) Transfer the mixed solution obtained in step 2) to a 100ml hydrothermal reaction kettle, and react for 2-10 hours at a temperature of 80-180°C. After the reaction is completed, wait until it naturally cools down to room temperature, and then perform vacuum drying;
4) The composite material obtained in step 3) is calcined in an inert atmosphere, and after the calcination is completed, it is cooled to room temperature to obtain the graphene/zirconium hydrogen phosphate composite material.
2. Prepare a silicon-zirconium composite super-hydrophilic wear-resistant coating. In this silicon-zirconium composite super-hydrophilic wear-resistant coating, the -OH on the surface of the layered zirconium hydrogen phosphate is acidic and can interact with the amines in the organic amine molecules. The neutralization reaction of the base occurs. Through this reaction, the layered zirconium hydrogen phosphate can be peeled off into a single layer of flaky nanoparticles. The flaky zirconium hydrogen phosphate is compounded with the silica sol containing the sulfonic acid group, and then silane coupling is added. The agent is co-hydrolyzed to prepare a silicon-zirconium composite super-hydrophilic and wear-resistant coating. After testing, this super-hydrophilic anti-fog coating has good anti-fog performance, good water resistance and weather resistance, and the coating prepared by this coating has high hardness and It has high wear resistance, scratch resistance, anti-fingerprint mark and stain resistance, and has excellent performance in car reversing mirrors, Tosoh matte powder windshields, bath mirrors, swimming goggles, optical protective dome covers, etc. Application prospects. Specifically as follows, a silicon-zirconium composite super-hydrophilic wear-resistant coating includes the following components by weight: 5-30 parts of a single layer of zirconium hydrogen phosphate, 10-50 parts of silica sol containing sulfonic acid groups, silane coupling Combined agent 20-30 parts, alcohol solvent 30-60 parts. In some embodiments, the silicon-zirconium composite super-hydrophilic wear-resistant coating includes the following components by weight: 10 parts of a single layer of zirconium hydrogen phosphate, 30 parts of silica sol containing sulfonic acid groups, silane coupling 30 parts of solvent and 50 parts of alcohol solvent.
[Main reference materials]
[1] Bai Jiahai; Gao Jie; Gai Chaoqun; Li Xiaoyue; Liu Yang. A simple method for preparing needle-like zirconium hydrogen phosphate. CN201610215166.4, application date 2016-04-08
[2] Liu Leguang. A preparation method and application of graphene/zirconium hydrogen phosphate composite material. CN201710701421.0, application date 2017-08-16
[3] Ding Fuchuan; Lin Wenbing; Kong Lingtao; Gong Zesheng; Lin Wenbin. Silicon-zirconium composite super hydrophilic wear-resistant coating. CN201610867633.1, application date 2016-09-29
