Method for preparing carbon nitride/silver nano composite material by reduction with chemical reducer
The invention discloses a method for preparing a carbon nitride/silver nano composite material by reduction with a chemical reducer. The method mainly comprises the following step: by using N,N-dimethylformamide (DMF) as a solvent and reducer and graphite-phase carbon nitride powder as a carrier, silver nucleates and grows on the carbon nitride layer under mild reaction conditions to obtain the carbon nitride/silver nano composite material. The preparation method is simple in technique (only relates to redox reaction), convenient to operate (heating is implemented by a water bath in the synthetic process), and low in cost (the carbon nitride is used as the carrier, and melamine is used as the raw material). The carbon nitride/silver nano composite material prepared by the preparation method has the advantages of high purity and low impurity content; the silver nanoparticles generated on the carbon nitride surface layer have the advantages of uniform particle size (10nm) and narrow distribution, and are firmly combined with carbon nitride; and the method can widen the application range of the carbon nitride/silver nano composite material in the fields of catalysis, electrochemistry, antisepsis and the like. 1. A chemical reducing agent to preparing nitrided carbon/silver nano-composite material, the carbon nitride/silver nano-composite material to 10 mg/L of methyl orange solution, in a catalytic reaction 4h methyl orange solution after the degradation rate of up to 80%, which is characterized by comprising the following steps: (1) the graphite phase carbon nitride in order to 6 - 10 mg/mL N the proportion of dispersed, in N-dimethyl formamide solution, the ultrasonic dispersion is the dispersion of carbon nitride; (2) in accordance with the quality of the graphite phase carbon nitride and silver nitrate ratio of 6 : 1 - 120 : 1 weighing silver nitrate, the silver nitrate dispersed in DMF, and surfactant polyvinyl pyrrolidone (PVP), its quality is the silver nitrate quality 1 - 1.5 times, magnetic stirring to make silver nitrate dispersion; (3) a preparation of the above-mentioned step and the second step mixing two solutions prepared, magnetic stirring, transfer to a port in the flask, the water bath is heated to 80 - 90 the [...] , the reaction is stirred, the reaction 10 - 20h; (4) three reaction is completed in the above-mentioned step the solution centrifugal, carbon nitride/silver complex is precipitated; and then until the repeated washing with distilled water to remove unbound silver nano-particles; finally the product is washed with ethanol, dried to obtain carbon nitride-silver nano-particle composition. 2. A chemical reducing agent to preparing nitrided carbon/silver nano-composite method according to Claim 1, characterized in that the stated step 1 the ultrasonic dispersion means in: the 40kHz, 100W ultrasonic cleaning device in the ultrasonic processing 30 min - 90 min. 3. A chemical reducing agent to preparing nitrided carbon/silver nano-composite method according to Claim 1, characterized in that the stated step 2 time for magnetic stirring in 30 - 60 min. 4. A chemical reducing agent to preparing nitrided carbon/silver nano-composite method according to Claim 1, characterized in that the step 3 in the magnetic stirring time of 10 - 30 min. 5. A chemical reducing agent to preparing nitrided carbon/silver nano-composite method according to Claim 1, characterized in that the stated step 2 silver nitrate dispersion in the concentration of the silver nitrate in 0.005mol/L - 0.03mol/L. 6. A chemical reducing agent to preparing nitrided carbon/silver nano-composite method according to Claim 1, characterized in that the step 4 in the centrifugal conditions: 4000 - 8000rmp centrifugal 3 - 5 min. 7. A chemical reducing agent to preparing nitrided carbon/silver nano-composite method according to Claim 1, characterized in that the step 4 the drying means in the vacuum degree is 100kPa in vacuum drying oven of 30 - 60 the drying [...] 12 - 24h.