CN101947442A

CN101947442A - Method for synthesizing nano zinc oxide/bamboo charcoal photocatalysis material by precipitation and impregnation

Info

Publication number: CN101947442A
Application number: CN 201010276120
Authority: CN
Inventors: 覃爱苗; 唐平; 陈海念; 吴建平; 周桂钉; 安宏泽
Original assignee: Guilin University of Technology
Current assignee: Guilin University of Technology
Priority date: 2010-09-07
Filing date: 2010-09-07
Publication date: 2011-01-19
Anticipated expiration: 2030-09-07
Also published as: CN101947442B

Abstract

The invention discloses a method for synthesizing nano zinc oxide/bamboo charcoal photocatalysis material by precipitation and impregnation, which comprises the following steps of: adding 0.1 to 0.25 gram of polyethylene glycol 6000 into a beaker containing 30mL of distilled water, dissolving the polyethylene glycol uniformly with stirring, then adding 0.0043 to 0.086 gram of ZnSO4.7H2O into the beaker, and dissolving the ZnSO4.7H2O uniformly; adding 0.5 to 1.0 gram of bamboo charcoal into the solution, and stirring the solution for 4 hours at room temperature and uniform velocity; slowly dripping 20mL of 0.0015mol/L NaOH solution into the beaker, and continuously stirring the solution for 8 hours at room temperature and uniform velocity after the dripping is finished; transferring the obtained mixed solution to a thermostatic water bath kettle of between 70 and 90 DEG C, and continuously reacting the mixed solution for 50 minutes with thermostatic uniform stirring; and taking out the beaker after the reaction is finished, cooling the reaction product with room-temperature uniform stirring, and filtering, washing and drying the reaction product to obtain the composite material. The ZnO nano particles in the composite material are spherical, and the average particle diameter is 40 to 100 nanometers. The method has the advantages of simple production equipment, convenient operation, easy control, small particle diameter and uniform distribution of ZnO in the composite material, high adsorption performance and photocatalysis performance of the nano composite material and the like.

Description

The method of precipitation-dipping synthesis of nano-zinc oxide/bamboo charcoal catalysis material

Technical field

The present invention relates to the method for a kind of precipitation-dipping synthesis of nano-zinc oxide/bamboo charcoal catalysis material.

Background technology

Bamboo charcoal has flourishing pore structure; and wide material sources; cheap; as a kind of novel absorption material, aspect environmental protection, be widely used as surrounding purifying material with pernicious gas such as formaldehyde in the absorbed air with as material for water treatment; but; bamboo charcoal absorption pollutant does not destroy pollutant to remove toxin, and this makes the adsorption capacity of bamboo charcoal reduce gradually along with the prolongation of service time, and inevitably will produce secondary pollution.Therefore, bamboo charcoal being carried out modification makes it existing better absorption property and has regenerability to have great importance again.Nano zine oxide is the good photochemical catalyst of a kind of photocatalysis performance, but there is the problem that reclaims difficulty during as photochemical catalyst in the powder nano zine oxide.With nano zine oxide and the organic contamination of load composite degradation, not only can bring into play the catalytic performance of nano zine oxide, also can improve it catalytic efficiency and change the shortcoming that is difficult to recycling when zinc oxide is single to be used.And bamboo charcoal is as a kind of functional novel environment friendly material, the strong adsorptivity of itself has certain effect to the aspect such as purifying, antibacterial, utilize the bamboo charcoal adsorption capacity to prepare the composite of bamboo charcoal and nano zine oxide, the adsorptivity that realizes bamboo charcoal combines with the nano-ZnO property is effective, be used for useless dirty the processing, be expected to become the hot issue of people's research.

Summary of the invention

Purpose of the present invention provides the method for a kind of precipitation-dipping synthesis of nano-zinc oxide/bamboo charcoal catalysis material, be the adsorptivity of comprehensive utilization bamboo charcoal and the photocatalysis of nano zine oxide, nano zine oxide is carried on the bamboo charcoal, makes both advantages obtain perfect adaptation.

It is raw material that the present invention adopts NaOH, Zinc vitriol, polyethylene glycol-6000 is done dispersant, adopt the method for precipitation-dipping under the certain reaction temperature and time, to prepare nano zine oxide-bamboo charcoal composite, and be to handle the organic matter research object with the methylene blue, estimate the absorption and the photocatalysis of this composite and fall performance.

Concrete steps are:

(1) the Macrogol 6000 adding with 0.1-0.25g fills in the beaker of 30mL distilled water, and stirring and dissolving evenly back adds ZnSO ₄7H ₂O 0.0043-0.086g, and make its uniform dissolution;

. (2) add the 0.5-1.0g bamboo charcoal in step (1) gained solution, at the uniform velocity stir 4h under the room temperature; Then slowly drip the NaOH solution 20mL of 0.0015mol/L, dropwise under the room temperature of back and continue at the uniform velocity to stir 8h;

(3) step (2) gained mixed solution is transferred in the thermostat water bath under 70-90 ℃, under constant temperature at the uniform velocity stirs, continues reaction 50min;

(4) take out the beaker room temperature after reaction is finished and at the uniform velocity stir down cooling, filter, wash, dry, promptly get catalysis material.The ZnO nano particle is spherical in the catalysis material, and average grain diameter is about 40-100nm.

With methylene blue is organic target degradation product, estimates absorption and the photocatalysis performance of nano-ZnO/bamboo charcoal catalysis material under natural daylight, ultraviolet light, dark condition, and compound reaches 77-96% to the percent of decolourization of methylene blue under ultraviolet light.

It is simple, easy to operate that the present invention has a production equipment, control easily, in the compound ZnO particle diameter little, be evenly distributed nano-complex absorption property and photocatalysis performance advantages of higher.

The specific embodiment

Embodiment:

(1) adding of 0.2g Macrogol 6000 is filled in the beaker of 30mL distilled water, stirring and dissolving evenly back adds ZnSO ₄7H ₂O 0.0043g, and make its uniform dissolution;

(2) in step (1) gained solution, add the 0.5g bamboo charcoal, at the uniform velocity stir 4h under the room temperature; Then slowly drip the NaOH solution 20mL of 0.0015mol/L, dropwise under the room temperature of back and continue at the uniform velocity to stir 8h;

(3) step (2) gained solution is transferred in the thermostat water bath under 80 ℃, under constant temperature at the uniform velocity stirs, continues reaction 50min;

(4) take out the beaker room temperature after reaction is finished and at the uniform velocity stir down cooling, filter, wash, dry, promptly get catalysis material; The ZnO nano particle is spherical in the catalysis material, and average grain diameter is about 43nm.

This catalysis material percent of decolourization to methylene blue under natural daylight and under the ultraviolet light all improves a lot than bamboo charcoal, and percent of decolourization is the highest under the ultraviolet light, and natural daylight takes second place.1 hour rear decoloring rate of UV-irradiation is that 93%, 4 hour rear decoloring rate is 96%.

Claims

1. the preparation method of a catalysis material is characterized in that concrete steps are:

(2) in step (1) gained solution, add the 0.5-1.0g bamboo charcoal, at the uniform velocity stir 4h under the room temperature; Then slowly drip the NaOH solution 20mL of 0.0015mol/L, dropwise under the room temperature of back and continue at the uniform velocity to stir 8h;

(3) step (2) gained solution is transferred in the thermostat water bath under 70-90 ℃, under constant temperature at the uniform velocity stirs, continues reaction 50min;

(4) take out the beaker room temperature after reaction is finished and at the uniform velocity stir down cooling, filter, wash, dry; The ZnO nano particle is spherical in the catalysis material, and average grain diameter is about 40-100nm.