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A preparation method and application of trace boron-doped cobalt oxyhydroxide

A cobalt oxyhydroxide, boron doping technology, applied in chemical instruments and methods, oxidized water/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., can solve the complex preparation process, limited catalytic activity, problems such as low catalytic efficiency, to achieve the effect of enriching active sites and stabilizing the physical and chemical structure

Active Publication Date: 2021-12-24
HUNAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Although CoOOH is a relatively efficient and stable oxygen evolution (OER) catalyst, it is limited by the catalytic activity of its cobalt sites, and its catalytic efficiency as a catalyst in the field of advanced oxidation water treatment is extremely low, so researchers usually use CoOOH is compounded with other catalysts to improve the catalytic performance of CoOOH, but the preparation process of these composite materials is generally complicated, which is not conducive to mass preparation and practical application.

Method used

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  • A preparation method and application of trace boron-doped cobalt oxyhydroxide
  • A preparation method and application of trace boron-doped cobalt oxyhydroxide
  • A preparation method and application of trace boron-doped cobalt oxyhydroxide

Examples

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Effect test

Embodiment 1

[0041] In this example, the preparation method of trace boron-doped cobalt oxyhydroxide (B-CoOOH) is as follows:

[0042] Mix 0.260 g of cobalt nitrate, 0.034 g of aluminum nitrate and 0.270 g of urea in 100 mL of ultrapure water, sonicate for 10 minutes, and then condense and reflux in an oil bath at 97 °C for 3 hours. After alternately rinsing with pure water, dry at 60°C to obtain cobalt-aluminum hydrotalcite powder, which is collected for future use. Take 0.02 g of the cobalt-aluminum hydrotalcite powder obtained above and disperse it in 8 mL of ultrapure water. After ultrasonication for 10 minutes, add 72 mL of a mixed solution containing 0.008 mol of sodium borohydride and 0.08 mol of sodium hydroxide, and stir magnetically at 30 °C for 12 hours, and then filtered to obtain a solid phase, washed and dried completely at 60°C to obtain a trace amount of boron-doped cobalt oxyhydroxide.

Embodiment 2

[0046]Using catalysts (divided into 4 groups according to the different types of catalysts, respectively using the B-CoOOH obtained in Example 1, the N-CoOOH obtained in Comparative Example 1, the CoOOH prepared by the traditional co-precipitation method, and the CoAl obtained by the method of Example 1 -LDH) to catalyze PMS to degrade PPCPs in water, the specific steps are as follows: Prepare the aqueous solution containing sulfamethoxazole as the solution to be treated (pH=7), the volume is 50mL, and the initial sulfamethoxazole concentration is 40 μM ( Among them, M is mol / L, μM is 10 -6 mol / L, mM is 10 -3 mol / L, the same below), add 5 mg of catalyst (mass concentration is 0.1g / L), and then add 0.3 mM PMS.

[0047] In addition, B-CoOOH and PMS were used alone to degrade the sulfamethoxazole in the above-mentioned solution to be treated as a control.

[0048] Related processing results such as Figure 4 with Figure 5 As shown, after 6 min of reaction, the removal rate o...

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Abstract

The present invention relates to a preparation method and application of trace boron-doped cobalt oxyhydroxide. The cobalt-aluminum hydrotalcite powder is dispersed in water to obtain suspension A; borohydride, strong alkali and water are uniformly mixed , to obtain a mixed solution; then mix the suspension A with the mixed solution, stir until completely reacted to obtain a suspension B; filter, wash and dry the suspension B in sequence to obtain a trace amount of boron Doped cobalt oxyhydroxide (B‑CoOOH). Compared with CoOOH prepared by the conventional method-precipitation method, B-CoOOH has stronger catalytic efficiency in the application of catalytic degradation of sulfamethoxazole, more stable physical and chemical structure, and the dissolution of heavy metal Co is extremely low. It can ensure that it will not cause secondary pollution to the water body during practical application, and is safe and environmentally friendly.

Description

technical field [0001] The invention relates to a preparation method and application of trace boron-doped cobalt oxyhydroxide, belonging to the field of material preparation. Background technique [0002] Pharmaceutical and Personal Care Products (PPCPs) are a class of emerging organic pollutants including various antibiotics, anti-inflammatory and antibacterial drugs, hair care products, etc. The rapid development of the biopharmaceutical industry is bringing human life and health While improving well-being, it also creates unstable factors for the safety of the ecological environment. A large number of PPCPs substances that have not been absorbed and metabolized by the human body flow into natural water bodies through human daily activities. Since PPCPs usually exist in trace concentrations in natural water bodies, they will not cause acute toxicity to organisms in the short term. However, PPCPs have extremely high chemical stability and refractory biodegradability. With ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75C02F1/72C02F101/30C02F103/34
CPCB01J23/75C02F1/725C02F2305/023C02F2101/30C02F2103/34C02F2103/343
Inventor 邓林施周曾寒轩
Owner HUNAN UNIV
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