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A kind of iron oxyhydroxide/cadmium sulfide nanobelt direct z-scheme photocatalyst and its preparation method

An iron oxyhydroxide, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, nanotechnology, etc., can solve the problem of different consumption rates of photogenerated electrons and holes, limit the efficiency of photocatalytic hydrogen production, and inhibit photogenerated electrons. Concentration and other issues, to achieve high redox potential, efficient photocatalytic water splitting to produce hydrogen, and improve photocatalytic efficiency.

Active Publication Date: 2021-09-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The band gap of cadmium sulfide is 2.4eV, and its conduction band and valence band positions are -0.52V (vs. NHE) and 1.88V (vs. NHE), respectively. The material has sufficient hydrogen production reduction potential, but the oxidation ability is insufficient. The consumption rate of photogenerated electrons and holes is different, which will significantly inhibit the concentration of photogenerated electrons, thereby limiting the efficiency of photocatalytic hydrogen production.

Method used

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  • A kind of iron oxyhydroxide/cadmium sulfide nanobelt direct z-scheme photocatalyst and its preparation method
  • A kind of iron oxyhydroxide/cadmium sulfide nanobelt direct z-scheme photocatalyst and its preparation method
  • A kind of iron oxyhydroxide/cadmium sulfide nanobelt direct z-scheme photocatalyst and its preparation method

Examples

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Effect test

Embodiment 1

[0033] A preparation method of iron oxyhydroxide / cadmium sulfide nanobelt direct Z-scheme photocatalyst, the steps are as follows:

[0034] (1) 6.82mmol CdCl 2 2.5H 2 O and 13.64 mmol of sodium diethyldithiocarbamate were dissolved in 120 mL of ethylenediamine, and then placed at 180 ° C for 24 hours of heat preservation reaction, the solution after the reaction was filtered, washed with water and ethanol repeatedly, and finally the separated product was placed at 60 Dry at ℃ for 12 hours to obtain cadmium sulfide nanobelts;

[0035] (2) Weigh 0.1g of cadmium sulfide nanobelt and place it in 35ml of deionized water, stir it ultrasonically to make it evenly dispersed, then add 6.8g of sodium nitrate, stir for 10min, then add 0.009g of ferric chloride, stir for 10min, and finally wash with hydrochloric acid The pH of the solution was adjusted to 1.5-2, and then the stirred solution was placed in a 50ml hydrothermal reaction kettle and kept at 90°C for 4h. The reacted solution...

Embodiment 2

[0037] A preparation method of iron oxyhydroxide / cadmium sulfide nanobelt direct Z-scheme photocatalyst, the steps are as follows:

[0038] The preparation of cadmium sulfide nanobelts was carried out according to Example 1.

[0039] Weigh 0.1g of cadmium sulfide nanobelt and place it in 35ml of deionized water, stir it ultrasonically to make it evenly dispersed, then add 6.8g of sodium nitrate, stir for 10min, then add 0.036g of ferric chloride, stir for 10min, and finally adjust the pH of the solution with hydrochloric acid 1.5-2, then put the stirred solution in a 50ml hydrothermal reaction kettle, and keep it warm at 90°C for 4h. The reacted solution was filtered and washed repeatedly with ethanol and deionized water. Then, the separated product was kept at 60° C. for 12 hours to obtain the iron oxyhydroxide / cadmium sulfide nanobelt direct Z-scheme photocatalyst. The width of the cadmium sulfide nanobelt in the catalyst is 50-70nm, and the diameter of the iron oxyhydroxi...

Embodiment 3

[0045] A preparation method of iron oxyhydroxide / cadmium sulfide nanobelt direct Z-scheme photocatalyst, the steps are as follows:

[0046] The preparation of cadmium sulfide nanobelts was carried out according to Example 1.

[0047] Weigh 0.1g of cadmium sulfide nanobelt and place it in 35ml of deionized water, stir it ultrasonically to make it evenly dispersed, then add 6.8g of sodium nitrate, stir for 10min, then add 0.09g of ferric chloride, stir for 10min, and finally adjust the pH of the solution with hydrochloric acid 1.5-2, then put the stirred solution in a 50ml hydrothermal reaction kettle, and keep it warm at 90°C for 4h. The reacted solution was filtered and washed repeatedly with ethanol and deionized water. Then, the separated product was kept at 60° C. for 12 hours to obtain the iron oxyhydroxide / cadmium sulfide nanobelt direct Z-scheme photocatalyst. The width of the cadmium sulfide nanobelt in the catalyst is 50-70nm, and the diameter of the iron oxyhydroxid...

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Abstract

The invention relates to a preparation method of iron oxyhydroxide / cadmium sulfide nanobelt direct Z-scheme photocatalyst. The method uses hydrothermal method and co-precipitation method to load iron oxyhydroxide nanoparticles on the surface of cadmium sulfide nanobelt to construct direct Z-scheme photocatalyst. ‑scheme photocatalyst realizes the recombination of photogenerated holes of cadmium sulfide and photogenerated electrons of iron oxyhydroxide, the remaining photogenerated electrons on cadmium sulfide can fully produce hydrogen, and the remaining photogenerated holes on iron oxyhydroxide can fully undergo oxidation reaction, realizing In the entire photocatalytic reaction, the reactions in the two directions are synchronized, thereby improving the photocatalytic efficiency and realizing efficient photocatalytic decomposition of water to produce hydrogen.

Description

technical field [0001] The invention relates to a photocatalytic hydrogen production catalyst, in particular to an iron oxyhydroxide / cadmium sulfide nanobelt direct Z-scheme photocatalyst and a preparation method thereof, belonging to the technical field of photocatalytic materials and their preparation. Background technique [0002] With today's global energy crisis and environmental pollution becoming more and more serious, the conversion of solar energy into hydrogen energy has attracted widespread attention, especially the photocatalytic decomposition of water to produce hydrogen has become an effective way to utilize solar energy, realize energy conversion, storage, and environmental governance. way. How photocatalytic technology can improve the efficiency of photocatalysts has become a hot issue in current research. In the process of realizing photocatalysis, charge separation is an important part of the photocatalysis process, and its efficiency directly affects the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043B01J35/10C01B3/04B82Y30/00B82Y40/00
CPCB01J27/043B01J35/004B01J35/1004B82Y30/00B82Y40/00C01B3/042C01B2203/0277C01B2203/1047Y02E60/36
Inventor 桑元华杜敏张小飞高文强王晓宁王书华王建军刘宏
Owner SHANDONG UNIV
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