Preparation method and application of catalyst for treating industry dye wastewater
A dye wastewater and catalyst technology, applied in the direction of oxidized water/sewage treatment, etc., can solve problems such as refractory degradation, toxicity, complex structure, etc., and achieve the effects of easy industrial production, good catalytic degradation effect, and simple preparation method.
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Embodiment 1
[0009] Embodiment 1: mesoporous structure composite metal oxide Mg / Fe 2 o 3 Prepare as follows:
[0010] 0.6g KIT-6 was dispersed in 5ml toluene, stirred for 30min, 0.139g Fe(NO 3 ) 3 9H 2 O and 0.362g Mg(NO 3 ) 2 ·6H 2 O was added to the above mixed system, and refluxed at 70°C for 6 hours to make it a uniform system; the solid powder in the system was dried in an oven at 60°C, and the temperature was 1°C·min -1 The heating rate was increased to 600°C and roasted in a muffle furnace for 3h; then the obtained solid powder was added to 2M NaOH solution, stirred in a water bath at 60°C for 24h to remove the template KIT-6, and finally washed three times with distilled water and ethanol, and placed in a vacuum oven Dry in medium.
[0011] The pores of the prepared catalyst are three-dimensional structure with regular arrangement, and the specific surface area is 90.7m 2 / g, the pore size is 9.1nm, and the tube wall spacing is about 0.48nm.
Embodiment 2
[0013] In the heterogeneous Fenton reaction, a catalyst is used to excite H 2 o 2 Decomposition produces OH, so the amount of catalyst has a certain influence on the degradation efficiency of methylene blue. In order to examine the effect of catalyst dosage on the degradation rate of methylene blue, four sets of comparative experiments were done by changing the catalyst dosage under the condition that other conditions were kept the same. Table 1 shows the effect of catalyst dosage on the degradation effect of methylene blue.
[0014] Table 1 Effect of catalyst dosage on the degradation effect of methylene blue
[0015] dosage
[0016] It can be seen from the above table that the amount of catalyst has a significant impact on the removal rate of the methylene basket solution. Generally speaking, the amount of catalyst increases, the number of surface active sites will increase accordingly, and the catalytic performance of the catalyst will increase. The activity is...
Embodiment 3
[0018] In order to examine the stability of the catalyst, the newly prepared catalyst was used for three repeated use degradation tests. After each use, the catalyst was washed with ethanol three times and then dried for the next use.
[0019] Table 2 Comparison of multiple use effects
[0020] usage count
[0021] As can be seen from Table 2, as the number of uses of the prepared catalyst increases, the degradation effect on methylene blue increases instead of decreasing. Larger, more active sites are exposed, which improves the catalytic activity. Therefore, the mesoporous structure composite metal oxide Mg / Fe 2 o 3 It has certain stability and anti-pollution ability.
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