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Multi-component composite titanium oxygen cluster (PTCs) CdSPCN-777 photocatalyst for decomposing water to produce hydrogen

A kind of PCN-777, photocatalyst technology

Pending Publication Date: 2020-05-22
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method uses NaS as a sulfur source to provide S when preparing CdS 2- , NaS releases S during the reaction 2- The speed is fast and difficult to control, which makes the prepared CdS ions easy to agglomerate, resulting in low hydrogen production efficiency in the photocatalytic process, which is only 510.5 μmol h -1 g -1 ~586.1μmol·h -1 g -1

Method used

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  • Multi-component composite titanium oxygen cluster (PTCs) CdSPCN-777 photocatalyst for decomposing water to produce hydrogen
  • Multi-component composite titanium oxygen cluster (PTCs) CdSPCN-777 photocatalyst for decomposing water to produce hydrogen
  • Multi-component composite titanium oxygen cluster (PTCs) CdSPCN-777 photocatalyst for decomposing water to produce hydrogen

Examples

Experimental program
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preparation example Construction

[0029] Specifically, a multi-component composite titanyl cluster (PTCs) CdSPCN-777 decomposes water and produces hydrogen photocatalyst, which is prepared by the following method:

[0030] A. Mix zirconium oxychloride, 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine, N,N-diethylformamide and trifluoroacetic acid evenly, React at 100-120°C, after the reaction is completed, after cooling, separation, washing and drying, the white solid product PCN-777 is obtained;

[0031] B. Add PCN-777 obtained in step A into water, then add cadmium salt, after dispersion, centrifuge filter; add the centrifuge filtered solid into water again, then add cadmium salt again, after dispersion, centrifuge again to obtain Cd-containing 2+ PCN-777;

[0032] C, with step B gained containing Cd 2+ Add PCN-777 into the autoclave, add water and sulfur source, react at 100-150 ° C, after the reaction is completed, after cooling, separation, washing and drying, the yellow CdS / PCN-777 photocatalyst is obtained;...

Embodiment 1

[0046] step one

[0047] Weigh 0.36g of zirconium oxychloride and 0.09g of 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine (TATB) into a 20mL reaction flask, then pipette 6mL N,N-diethylformamide (DEF) and 0.9mL of trifluoroacetic acid were added to a 20mL small glass bottle, placed on a magnetic stirrer and stirred for 30 minutes, then reacted in an oven at 120°C for 24 hours, and took out Naturally cooled to room temperature, centrifuged, washed several times with ethanol, and dried to obtain the white solid product PCN-777.

[0048] step two

[0049] Weigh 0.5g of the PCN-777 sample, add it to a beaker, add 25mL of deionized water to the beaker, then add 0.2g of cadmium acetate, stir at 40°C for 24 hours, then centrifugally filter; In the beaker, add 25mL deionized water and 0.2g cadmium acetate into the beaker, stir at 50°C for 12 hours, then add the solid sample obtained after centrifugal filtration into a 50mL autoclave liner, and add 25mL deionized water and Put 0.2g of t...

Embodiment 2

[0053] step one

[0054] Weigh 0.36g of zirconium oxychloride and 0.09g of 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine (TATB) into a 20mL reaction flask, then pipette 6mL Add N,N-diethylformamide (DEF) and 0.9mL trifluoroacetic acid into a 20mL small glass bottle, place it on a magnetic stirrer and stir for 30 minutes, react in an oven at 120°C for 24 hours, take out Naturally cooled to room temperature, centrifuged, washed several times with ethanol, and dried to obtain the white solid product PCN-777.

[0055] step two

[0056] Weigh 1.0g of PCN-777 sample, add it to a beaker, add 25mL deionized water to the beaker, then add 0.5g cadmium acetate, stir at 40°C for 24 hours, and then centrifugally filter; add the solid sample obtained by centrifugal filtration Add 25mL of deionized water and 0.5g of cadmium acetate into the beaker, stir at 50°C for 12 hours, then add the solid sample obtained after centrifugal filtration into a 50mL autoclave liner, and then add 25mL of deion...

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Abstract

The invention discloses a multi-component composite titanium oxide cluster (PTCs) CdSPCN-777 photocatalyst for decomposing water to produce hydrogen, belonging to the technical field of photocatalyticmaterials. The multi-component composite titanium oxide cluster (PTCs) CdSPCN-777 photocatalyst for decomposing water to produce hydrogen has excellent catalytic efficiency. The preparation method for the multi-component composite titanium oxide cluster (PTCs) CdSPCN-777 photocatalyst comprises the following steps: allowing zirconium oxychloride, 2,4,6-tri(4-carboxyphenyl)-1,3,5-triazine, DEF andtrifluoroacetic acid to react so as to synthesize PCN-777; dispersing Cd<2+> into the PCN-777 so as to obtain PCN-777 containing Cd<2+>; then allowing the PCN-777 containing Cd<2+> to react with a sulfur source so as to obtain CdS / PCN-777; and mixing the CdS / PCN-777, phenylphosphonic acid, organic acid and isopropanol, and allowing an obtained mixture to react with Ti(OiPr)4 so as to obtain (PTCs)CdSPCN-777. According to the invention, the hydrogen production capacity of the (PTCs)CdSPCN-777 reaches 2.37 mmol / (g.h) or above.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a photocatalyst for decomposing water to produce hydrogen, in particular to a photocatalyst for decomposing water to produce hydrogen in response to visible light. Background technique [0002] Under the dual pressure of energy crisis and environmental crisis, hydrogen, as a secondary energy carrier, has the characteristics of clean, efficient, safe, storable, and transportable, and has become a research hotspot at home and abroad. Today's industrial petrochemical energy conversion technology is the main way to produce hydrogen, but this process consumes fossil fuels and emits carbon dioxide, which ultimately cannot solve the energy crisis and environmental problems. Therefore, the most ideal hydrogen production method is to produce hydrogen by photocatalyst decomposition of water. Since Fujishima et al. reported TiO in 1972 2 Since the phenomenon o...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J31/22C01B3/04
CPCB01J31/38B01J31/1691C01B3/042B01J35/39Y02E60/36
Inventor 蒋志强范文娟李玉峰常会卢进李坤晏航
Owner PANZHIHUA UNIV
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