Preparation method and application of P-Co/CoO heterojunction nano material

A nanomaterial and heterojunction technology, applied in chemical instruments and methods, water/sewage treatment, chemical/physical processes, etc., can solve the problems of difficult removal of metal ions, environmental and human harm, and leaching of transition metal ions. The effect of easy operation, low cost and simple preparation method

Pending Publication Date: 2022-05-31
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of water environment treatment, the leaching of transition metal ions has always been a problem
Higher concentrations of metal ions are not only difficult to remove, but also cause great harm to the environment and the human body

Method used

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  • Preparation method and application of P-Co/CoO heterojunction nano material
  • Preparation method and application of P-Co/CoO heterojunction nano material
  • Preparation method and application of P-Co/CoO heterojunction nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Preparation of target product

[0029] 1. Co(OH) 2 Preparation of nanosheets

[0030] Measure 150ml deionized water into a round bottom flask, weigh 0.945gHMT and 0.36gCoCl 2 ·6H 2 O was added to the reaction system, N 2 The temperature was raised to 95°C under the atmosphere to reflux, stirred for 12 h, and then cooled to room temperature naturally. will produce Co(OH) 2 The precursors were collected by vacuum filtration, washed several times with water and ethanol, and dried in a vacuum drying oven for 12 hours. Light green Co(OH) can be obtained 2 Precursor.

[0031] 2. Preparation of P-Co / CoO heterojunction

[0032] Weigh 40mgCo(OH) 2 The precursor and 2 mg of red phosphorus were put into a quartz tube with an outer diameter of 8 mm, an inner diameter of 6 mm and a length of 15 cm. After the tube was vacuum sealed, the tube was placed in a muffle furnace, and the temperature was raised to 300 ° C for 12 h. After the end, it was naturally cooled t...

Embodiment 2

[0033] Example 2: Activation of PMS to generate SO 4 ·— Degradation of SMX with OH

[0034]1 mg of P-Co / CoO material was uniformly dispersed in 100 ml of 10 mg / L SMX solution, and the concentration change of SMX was measured by high performance liquid chromatography. image 3 It is the picture of P-Co / CoO heterojunction nanomaterials activated PMS to degrade 10mg / L SMX solution. It can be seen from the figure that in the absence of catalyst, pure PMS can hardly degrade SMX. The catalyst can degrade more than 99% in 8min, while Co(OH) 2 Compared with CoO nanosheets activated PMS, the degradation of 33.1% and 42.9% in 8 min respectively proves that the material has the effect of activating PMS to degrade SMX.

Embodiment 3

[0035] Example 3: FT-IR of P-Co / CoO and Co / CoO

[0036] The wave number is at 1186cm -1 and 985cm -1 , belong to the symmetric stretching vibration and asymmetric stretching vibration of P-O, respectively, and 1028cm-1 belongs to PO 2 - , PO 3 - The bending vibration of red phosphorus proved that phosphate species was formed on the catalyst surface.

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Abstract

The invention discloses a preparation method and application of a P-Co/CoO heterojunction nanometer.The preparation method comprises the steps that firstly, a Co (OH) 2 precursor is prepared, then red phosphorus is added for firing, and the obtained P-Co/CoO heterojunction material shows good catalytic activity and stability. The P-Co/CoO heterojunction nano material can catalytically activate PMS to generate high-oxidizability SO4 <.-> (sulfate radical), OH (hydroxyl radical) and other active oxygen species, and pollutants harmful to human bodies in the environment, such as sulfamethoxazole, are degraded. Besides, when the loading capacity of the material is only 0.01 g/L and the use amount of PMS is 0.1 g/L, 99% removal rate of SMX (10mg/L) can be realized within 8 minutes, and the material has good stability and circularity.

Description

technical field [0001] The invention relates to a preparation method and application of a P-Co / CoO heterojunction nanomaterial. Background technique [0002] Today, antibiotics are widely used to treat disease and protect human and animal health. Sulfamethoxazole (SMX) is one of the most widely used antibiotics and is frequently detected in the environment. Furthermore, its removal is challenging due to its resistance to natural biodegradation, which leads to the accumulation of SMX and poses a serious threat to the environment and human health. Removal of SMX has become an urgent scientific problem in the field of water treatment. [0003] OH is a non-selective strong oxidizing group with a redox potential of 2.8V, which can effectively destroy the structure of pollutants and mineralize these pollutants to a certain extent. In recent years, sulfate radicals (SO 4 —· )-based advanced oxidation processes have attracted extensive attention. Among various water treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C02F1/72C02F101/30C02F101/38C02F101/34
CPCB01J27/1853B01J35/023C02F1/725C02F1/722C02F2305/023C02F2101/30C02F2101/40C02F2101/38C02F2101/34Y02W10/37
Inventor 张锋孙志伟闫海宁孙敏翟林峰
Owner HEFEI UNIV OF TECH
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