Stable ternary composite material for hydrogen production by photocatalytic decomposition of water and preparation method thereof

A composite material and photocatalytic technology, which is applied in the field of catalytic material preparation, can solve the problem of not meeting the requirements of photocatalytic hydrogen production activity, and achieve the effects of efficient and stable photocatalytic water splitting for hydrogen production, promoting electron transfer, and improving separation rate.

Inactive Publication Date: 2021-06-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some MOFs themselves can exhibit semiconductor-like characteristics and show certain photocatalytic activity, but they cannot meet the activity requirements of photocatalytic hydrogen production.

Method used

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  • Stable ternary composite material for hydrogen production by photocatalytic decomposition of water and preparation method thereof
  • Stable ternary composite material for hydrogen production by photocatalytic decomposition of water and preparation method thereof
  • Stable ternary composite material for hydrogen production by photocatalytic decomposition of water and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, accurately weigh 5mg RGO and disperse it into 40mL ethanol solution, then put it into a 50mL polytetrafluoroethylene liner, ultrasonically treat it for 1h, then accurately weigh 1.00g, 0.50g, and 0.33g of MOF-808 and add them to the In the three PTFE liners, ultrasonically mix evenly; then put the three PTFE liners into steel kettles respectively, and keep them in an oven at 120°C for 12 hours. Washed three times with water and ethanol, and finally dried in a vacuum oven at 50 °C to obtain the MOF-808 / RGO composite, denoted as M8R Y . The three samples are respectively recorded as M8R according to the mass percentage of the added RGO and MOF-808 0.5 , M8R 1 , and M8R 1.5 ; Accurately weigh 0.1839g Cd(CH 3 COO) 2 2H 2 O (about 0.69mmol) was added to 40mL deionized water, ultrasonically dissolved, and then the composite material M8R was accurately weighed Y The mass is 0.5g, 0.25g, 0.2g, 0.167g, 0.125g, dispersed in the above solution, ultrasonic treatment f...

Embodiment 2

[0039] Example 2: Compared with Example 1, the recombination temperature of RGO and MOF-808 is 130°C.

[0040] First, accurately weigh 5mg RGO and disperse it into 40mL ethanol solution, then put it into a 50mL polytetrafluoroethylene liner, ultrasonically treat it for 1h, then accurately weigh 1.00g, 0.50g, and 0.33g of MOF-808 and add them to the In the three polytetrafluoroethylene linings, ultrasonically mix evenly; then put the three polytetrafluoroethylene linings into steel kettles respectively, keep them in an oven at 130°C for 12h, and after natural cooling, the products are separated into water and anhydrous Washed with ethanol three times, and finally dried in a vacuum oven at 50 °C to obtain the MOF-808 / RGO composite, denoted as M8R Y , The productive rate is slightly lower than that of Example 1. The three samples are respectively recorded as M8R according to the mass percentage of the added RGO and MOF-808 0.5 , M8R 1 , and M8R 1.5 ; Accurately weigh 0.1839g ...

Embodiment 3

[0041] Example 3: Compared with Example 1, the recombination temperature of CdS and MOF-808 / RGO is 50°C.

[0042] First, accurately weigh 5mg RGO and disperse it into 40mL ethanol solution, then put it into a 50mL polytetrafluoroethylene liner, ultrasonically treat it for 1h, then accurately weigh 1.00g, 0.50g, and 0.33g of MOF-808 and add them to the In the three PTFE liners, ultrasonically mix evenly; then put the three PTFE liners into steel kettles respectively, and keep them in an oven at 120°C for 12 hours. Washed three times with water and ethanol, and finally dried in a vacuum oven at 50 °C to obtain the MOF-808 / RGO composite, denoted as M8R Y . The three samples are respectively recorded as M8R according to the mass percentage of the added RGO and MOF-808 0.5 , M8R 1 , and M8R 1.5 ; Accurately weigh 0.1839g Cd(CH 3 COO) 2 2H 2 O (about 0.69mmol) was added to 40mL deionized water, ultrasonically dissolved, and then the composite material M8R was accurately weigh...

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Abstract

The invention discloses a preparation method of a stable ternary composite material for hydrogen production by photocatalytic decomposition of water. The ternary composite material is prepared by compounding a CdS semiconductor material with MOF-808 and reduced graphene oxide under a low-temperature hydrothermal condition. The composite material can be kept stable under the light radiation condition, has excellent light corrosion resistance, does not use a high-boiling-point organic solvent in the synthesis process, and does not pollute the environment. The composite material has a lower band gap value than pure CdS, and can effectively respond to visible light and enhance light absorption. CdS is compounded with MOF-808 and RGO, so that the effective catalytic activity area of CdS is increased, the migration distance of photon-generated carriers is shortened, the carrier migration rate is greatly increased, the quantum utilization efficiency is improved, and the photocatalytic hydrogen production activity of the composite material is further improved. A photocatalytic water decomposition hydrogen production performance test shows that the ternary composite material has excellent photocatalytic hydrogen production performance.

Description

technical field [0001] The invention belongs to the field of preparation of catalytic materials, and specifically relates to a stable ternary composite material with excellent photocatalytic water splitting hydrogen production performance prepared by compounding MOF-808 and RGO with CdS semiconductor materials and a preparation method thereof. Background technique [0002] The abuse of fossil fuels has aggravated environmental problems. With the improvement of people's awareness of environmental protection and the depletion of fossil fuels, it is particularly important to develop environmentally friendly and renewable energy. Solar energy is a cheap and clean energy, but the energy density of solar energy is low, it is not easy to store and use, and it needs to be converted into a high-density energy form. As a high-density renewable and clean energy, hydrogen energy has attracted extensive attention from scholars at home and abroad. Compared with other forms of energy conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C01B3/04
CPCB01J31/26B01J35/004C01B3/042Y02E60/36
Inventor 朱光辉夏昌坤陆佳慧魏君梅
Owner JIANGSU UNIV
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