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Preparation method and application of MIL-125 loaded 1T-phase molybdenum sulfide composite photocatalyst

A MIL-125, molybdenum sulfide technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve weak photocatalytic performance, poor photoresponse ability, etc. problem, to achieve the effect of improved responsiveness, low cost, and enhanced ability

Pending Publication Date: 2022-08-05
NORTHEASTERN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the shortcomings of existing photocatalysts such as poor visible light response ability and weak photocatalytic performance, the present invention proposes a MIL-125 loaded 1T phase molybdenum sulfide composite photocatalyst with simple synthesis method, low cost preparation method and strong photocatalytic activity. Catalyst preparation method

Method used

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  • Preparation method and application of MIL-125 loaded 1T-phase molybdenum sulfide composite photocatalyst
  • Preparation method and application of MIL-125 loaded 1T-phase molybdenum sulfide composite photocatalyst
  • Preparation method and application of MIL-125 loaded 1T-phase molybdenum sulfide composite photocatalyst

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preparation example Construction

[0029] see figure 1 , a preparation method of a MIL-125 loaded 1T phase molybdenum sulfide composite photocatalyst provided in the embodiment of the present invention comprises the following steps:

[0030] Step 1) Dissolve thiourea and ammonium molybdate in deionized water and fully stir to obtain a mixed solution, then transfer the mixed solution to a reaction kettle and put it into an oven, and perform a hydrothermal reaction to obtain a black solution.

[0031] Wherein, the molar ratio of ammonium molybdate mixed with thiourea is 1:2-1:3, and the stirring temperature of thiourea and ammonium molybdate in deionized water is 15-25°C. The hydrothermal temperature for the hydrothermal reaction of the mixed solution of thiourea and ammonium molybdate is 170-230°C, and the holding time is 18-30h.

[0032] Step 2) Wash the obtained black solution with absolute ethanol to remove impurities, then transfer to a constant temperature oven for drying, and grind the solid obtained by d...

Embodiment 1

[0049] Add thiourea and ammonium molybdate into deionized water, stir and mix thoroughly, transfer the mixed solution to the reaction kettle, set the temperature of the reaction kettle to 200°C, and carry out hydrothermal reaction, and the reaction lasts for 24 hours. Then the reaction kettle was taken out and cooled naturally, and the obtained solution was suction filtered with 200 ml of absolute ethanol. After suction filtration, it was transferred to a constant temperature drying oven at 60°C for drying for 10 hours, and the samples were ground to obtain black 1T phase molybdenum sulfide powder.

Embodiment 2

[0051] 25 ml of DMF and 25 ml of methanol were mixed, and 1.09 g of 2-aminoterephthalic acid and 1.02 g of butyl titanate were added thereto and mixed well. The mixture was transferred to a reactor for hydrothermal reaction, the reaction temperature was 150° C., the reaction continued for 16 hours, and the reaction was naturally cooled after the completion of the reaction. The obtained yellow solution was centrifuged at a high speed at 7000 r / min, the precipitate was taken out after five minutes, and 50 ml of DMF was added for washing for two hours. After washing, centrifuge again to obtain a precipitate, and perform the second DMF washing. The precipitate was obtained by centrifugation again, and 50 ml of methanol was added for washing for two hours. After washing, centrifuge again to obtain a precipitate, which is then washed with methanol for the second time. After the last washing, the precipitate obtained by centrifugation was placed in a constant temperature drying ove...

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Abstract

The invention provides a preparation method of an MIL-125 loaded 1T-phase molybdenum sulfide composite photocatalyst. The preparation method comprises the following steps: preparing a black solution from ammonium molybdate and thiourea; washing with the black solution, and drying to obtain molybdenum sulfide powder; adding butyl titanate and 2-aminoterephthalic acid into a mixed solution of an N, N-dimethylformamide solution and methanol to obtain a mixed solution; carrying out hydrothermal reaction on the mixed solution to obtain a reacted solution; washing the reacted solution, and separating to obtain a precipitate; and drying the precipitate to obtain the MIL-125 loaded 1T-phase molybdenum sulfide composite photocatalyst. The invention also provides an application of the MIL-125 loaded 1T phase molybdenum sulfide composite photocatalyst. The preparation method of the composite photocatalyst provided by the invention is simple, the preparation method is economical and low in cost, and the prepared composite photocatalyst is relatively high in photocatalytic activity, is used for photocatalytic reduction of CO2 into ethanol, and has relatively high conversion capacity.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a preparation method and application of a MIL-125 supported 1T phase molybdenum sulfide composite photocatalyst. Background technique [0002] The impact of carbon dioxide emissions on the environment has become a worldwide problem that cannot be ignored and needs to be solved urgently. Photocatalytic reaction, also known as artificial photosynthesis, utilizes photocatalysts to absorb light energy and convert carbon dioxide into CO, CH 4 , CH 3 OH and C 2 H 5 OH and other resources can also obtain usable resources while reducing carbon emissions, and have broad application prospects. [0003] Compared with semiconducting molybdenum sulfide (2H MoS 2 ), metallic molybdenum sulfide (1T MoS 2 ) has a conductivity similar to that of metals, and has more abundant reactive sites and good photocatalytic activity. MIL-125 has excellent visible light responsiveness and non-t...

Claims

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Application Information

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IPC IPC(8): B01J31/34B01J31/22C07C29/15C07C31/08
CPCB01J31/34B01J31/1691B01J31/1616C07C29/15B01J2231/62B01J2531/46B01J35/39C07C31/08Y02E60/36
Inventor 杜涛王义松吴凡陈鹏贾贺宫赫李英楠
Owner NORTHEASTERN UNIV
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