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Preparation method and application of Co-CDs(at)NM photocatalyst

A photocatalyst and co-cds technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems that are not suitable for ppb level NO removal, and achieve low equipment requirements, simple operation, and mild conditions Effect

Active Publication Date: 2020-09-15
CHONGQING TECH & BUSINESS UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problem that the existing oxidation, heterogeneous catalytic reduction and physical / chemical adsorption methods are not suitable for ppb level NO removal, and to provide a Co-CDs@NM photocatalyst Preparation method and application

Method used

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  • Preparation method and application of Co-CDs(at)NM photocatalyst
  • Preparation method and application of Co-CDs(at)NM photocatalyst
  • Preparation method and application of Co-CDs(at)NM photocatalyst

Examples

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Embodiment 1

[0033] 1) Dissolve 2.86 g of 2-aminoterephthalic acid in a mixed solution of 40 mL DMF and 10 mL of anhydrous methanol, then add 2.86 mL of titanium isopropoxide, and place the mixture in a hydrothermal reaction Kettle, and placed in an oven at 110 ° C for 72 hours, then let it cool down to room temperature;

[0034] 2) Soak and wash the solid obtained by filtering in 1) with DMF and methanol respectively overnight, and then filter with suction to obtain the solid;

[0035] 3) Dry the solid obtained in 2) in vacuum to obtain NH 2 -MIL-125.

[0036] 2. Synthesis of Co-CDs@NM photocatalyst

Embodiment 2

[0038] (1) Dissolve 136.77 mg cobalt gluconate in 30 mL ethanol / water (9:1) solution, add 300 mg NH 2 - After stirring the MIL-125 for 6 hours, the solid was obtained by suction filtration with ethanol / water (9:1) solution.

[0039] (2) Vacuum-dry the obtained solid at 45°C for 8h, then put the dried solid into a tube furnace, and in a nitrogen atmosphere, raise the temperature to 240°C at a rate of 5°C / min and then calcinate for 2h to obtain the Co-CDs@NM photocatalyst.

[0040] The Co-CDs@NM obtained in this example was analyzed and tested, wherein the XRD spectrum of Co-CDs@NM was as follows figure 1 As shown, the FT-IR spectrum (Fourier transform infrared spectrometer (FT-IR)) is as figure 2 As shown, the XPS spectrum of Co 2p is as image 3 , indicating that the valence state of the cobalt dopant is Co II , UV-Vis spectrum such as Figure 4 As shown, the PL spectrum is shown as Figure 5 As shown, the EIS spectrum is as Figure 6 As shown, the transient photocurre...

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Abstract

The invention discloses a preparation method and application of a Co-CDs(at)NM photocatalyst. The preparation method comprises the following steps of: dissolving cobalt gluconate in an ethanol / water solution, adding NH2-MIL-125, stirring for 6 hours, and carrying out suction filtration to obtain a solid; and carrying out vacuum drying on the solid at 45 DEG C for 8 h, and calcining the dried solidin a tubular furnace to obtain the Co-CDs(at)NM photocatalyst. The preparation method is simple to operate, mild in condition and low in equipment requirement, and is a simple and environment-friendly preparation method. The Co-CDs(at)NM photocatalyst prepared by the method is a low-toxicity catalyst, and ppb-grade NO can be oxidized to form nitrate or nitrite which is easy to remove, so that NOis effectively removed.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method and application of a Co-CDs@NM photocatalyst. Background technique [0002] With growing concern about serious environmental issues, the development of cost-effective and efficient technologies to detect, regulate and eliminate various atmospheric pollutants (nitrogen oxides (NO x ), particulate matter (PM), volatile organic compounds (VOC) and sulfur oxides (SO x ) etc.) has been a hot topic. Among them, nitrogen oxides are considered to be one of the major threats to global climate change and human health problems, because it is the most important factor in the formation of photochemical smog, acid rain, and smog. Several methods including oxidation, heterogeneous catalytic reduction, and physical / chemisorption have been reported to show high efficiencies in removing NO. The above method has the problems of high temperature conditions, high input cost,...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/75B01J35/10B01J31/22B01D53/86B01D53/56
CPCB01J23/75B01J27/24B01J31/2243B01D53/8628B01J2531/46B01J35/39B01J35/61Y02A50/20
Inventor 贺有周罗爽谭宇刘兴燕谭祥国徐永港
Owner CHONGQING TECH & BUSINESS UNIV
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