Porous boron nitride loaded iron nano material as well as preparation method and application thereof

A technology of boron nitride and iron nanometers, which is applied in the fields of chemical instruments and methods, chemical/physical processes, oxidized water/sewage treatment, etc., can solve the problems of limited catalytic effect, achieve removal benefits, large specific surface area, high ratio The effect of surface area

Active Publication Date: 2020-05-08
HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, high-efficiency catalysts for catalyzing persulfate are still in the research stage, and the catalytic effect of existing catalysts is very limited. Therefore, it is necessary to develop a new type of high-efficiency material to catalyze the oxidation of oxytetracycline hydrochloride in water by sodium persulfate

Method used

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  • Porous boron nitride loaded iron nano material as well as preparation method and application thereof
  • Porous boron nitride loaded iron nano material as well as preparation method and application thereof
  • Porous boron nitride loaded iron nano material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1: a kind of preparation method of porous boron nitride supported iron nanomaterial, specifically comprises the following steps:

[0041]Weigh 5.5074g melamine and 5.3762g boric acid into 500mL ultrapure water, heat to 95°C and stir to dissolve. Dry after cooling, and then grind to get the powder, pour the powder obtained above into the quartz cup, put it into the tube furnace after covering it, and put it in the NH 3 The temperature was raised to 1500° C. for 4 h in the air at 5° C. / min for calcination, and then cooled naturally to obtain porous boron nitride (PBN). Weigh 3.5841g Fe(NO 3 ) 3 9H 2 O and 10.9312g PBN were added to a 500mL beaker, and 200mL ultrapure water was added to stir at 85°C for 4h. The sand core funnel was suction filtered (washed three times with ethanol and ultrapure water), and the obtained product was ground to obtain the final product Fe-PNB (porous boron nitride-supported iron nanomaterial). The prepared porous boron nitride-...

Embodiment 2

[0044] Embodiment 2: Various advanced oxidation processes are compared to the oxidation efficiency control experiment of oxytetracycline hydrochloride. The specific process and results are as follows:

[0045] In order to discover the advantages of the combination of porous boron nitride-supported iron nanomaterials and sodium persulfate, we added photocatalytic (TiO 2 and H 2 o 2 ) and electrocatalysis (electrode + power supply) control experiments. Configure 0.04mmol / L oxytetracycline hydrochloride solution for TiO 2 / H 2 o 2 (20mg / L, 4mmol / L), iron electrode / power supply, Fe-PNB / PMS (100, 150mg / L) experiments, the results are as follows image 3 As shown, after 5min of reaction, TiO 2 and H 2 o 2 The oxidation efficiency of oxytetracycline hydrochloride is 45.2%; the oxidation efficiency of electrode + power supply to oxytetracycline hydrochloride is 6.4%; the oxidation efficiency of porous boron nitride loaded iron nanomaterials and sodium persulfate to oxytetracyc...

Embodiment 3

[0046] Embodiment 3: Porous boron nitride-loaded iron nanomaterials and sodium persulfate are used to remove different concentrations of oxytetracycline hydrochloride. The specific process and results are as follows:

[0047] Configure a series of oxytetracycline hydrochloride solutions with concentrations of 0.04, 0.08, 0.16 and 0.20mmol / L respectively, take 50mL of them in the reaction device, and then add 100mg / L of porous boron nitride loaded iron material and 150mg / L of Sodium sulfate reacted for 5 minutes, and samples were taken at 0, 1, 2, 3, and 5 minutes. The result is as Figure 4 As shown, the oxytetracycline hydrochloride solution of 0.04-0.20 mmol / L can be effectively catalyzed and oxidized by the porous boron nitride-supported iron material, and the oxidation efficiencies are 92.6%, 90.1%, 88.4% and 83.6%, respectively.

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Abstract

The invention discloses a porous boron nitride loaded iron nano material as well as a preparation method and application thereof. The preparation method of the porous boron nitride loaded iron nano material comprises the following steps: preparing porous boron nitride by taking melamine and boric acid as raw materials, and carrying out a reaction with Fe(NO3)3.9 H2O to prepare the novel porous boron nitride loaded iron nano material which contains an iron base with high catalytic capability and has the characteristics of large specific surface area and multiple pores. The porous boron nitrideloaded iron nano material has efficient catalytic activity on sodium persulfate and can catalytically generate a large number of SO<4-> free radicals to remove oxytetracycline hydrochloride, so that the porous boron nitride loaded iron nano-material has the advantages of high catalytic activity, recyclability, avoidance of secondary pollution, wider pH application range, low energy consumption, high efficiency and the like when applied to treatment of wastewater containing oxytetracycline.

Description

technical field [0001] The invention relates to the field of environmental protection materials, in particular to a porous boron nitride-supported iron nanometer material and its preparation method and application. Background technique [0002] Porous boron nitride is a new type of porous nanomaterial with high specific surface area and rich pore structure, and the pore size can also be adjusted manually. Compared with ordinary bulk boron nitride, porous boron nitride has a higher specific surface area, so it is widely used in the fields of adsorbents, catalyst supports, and hydrogen storage materials. In addition, porous boron nitride also has good high temperature stability and excellent catalytic and selective adsorption properties, and its chemical and thermal properties do not change much at higher temperatures. The development of new porous boron nitride materials is still a research hotspot. [0003] In recent years, the aquaculture industry has developed very rapid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/72C02F101/38
CPCB01J27/24B01J35/1004C02F1/722C02F2101/38
Inventor 喻海彬黄放魏勇红江湛如袁本琦
Owner HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD
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