A kind of supported photocatalyst and preparation method thereof

A photocatalyst and load-type technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of high cost of precious metals, achieve enhanced photocatalytic activity, high hydrogen production activity, and improve photocatalytic production. The effect of hydrogen activity

Active Publication Date: 2021-08-31
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metals such as platinum and gold are widely used as co-catalysts and have good photocatalytic activity, but due to the high cost of noble metals, researchers tend to look for alternative non-noble metal co-catalysts

Method used

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  • A kind of supported photocatalyst and preparation method thereof
  • A kind of supported photocatalyst and preparation method thereof
  • A kind of supported photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 5 mmol of cadmium acetate dihydrate and 5 mmol of manganese acetate tetrahydrate in a beaker containing 40 mL of deionized water and stir to dissolve, then add 10 mmol of thioacetamide, stir for 30 min, and then transfer the solution to polytetrafluoroethylene The ethylene reaction kettle was lined and sealed in a stainless steel reaction kettle, and kept at 160 °C for 24 hours. After cooling down to room temperature, the precipitate was washed with deionized water and absolute ethanol by centrifugation and dried to obtain Mn 0.5 Cd 0.5 S solid solution samples.

Embodiment 2

[0034] Dissolve 7.3 μmoL nickel sulfate hexahydrate and 7.3 μmoL sodium selenite in a beaker containing 40 mL of ethylene glycol solvent, then add 100 mg of the Mn prepared in Example 1 0.5 Cd 0.5 S solid solution was stirred for 30 min and then transferred into a 50 mL polytetrafluoroethylene liner. After the autoclave was sealed, it was kept at 180 °C for 24 h, and finally cooled down to room temperature naturally. The obtained samples were washed by centrifugation with deionized water and absolute ethanol, and oven-dried at 80 ℃ to obtain 1 wt%-NiSe / Mn 0.5 Cd 0.5 S samples.

Embodiment 3

[0036] Dissolve 22 μmoL nickel sulfate hexahydrate and 22 μmoL sodium selenite in a beaker containing 40mL of ethylene glycol solvent, then add 100 mg of the Mn prepared in Example 1 0.5 Cd 0.5 S solid solution was stirred for 30 min and then transferred into a 50 mL polytetrafluoroethylene liner. After the autoclave was sealed, it was kept at 180 °C for 24 h, and finally cooled down to room temperature naturally. The obtained samples were washed by centrifugation with deionized water and absolute ethanol, and dried in an oven at 80 ℃ to obtain 3 wt%-NiSe / Mn 0.5 Cd 0.5 S samples.

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Abstract

The invention discloses a loaded photocatalyst NiSe / Mn 0.5 Cd 0.5 S and preparation method thereof, it is to adopt mild one-step hydrothermal method to synthesize Mn earlier 0.5 Cd 0.5 S solid solution, and then react it with nickel sulfate hexahydrate and sodium selenite. NiSe and Mn in the composite catalyst 0.5 Cd 0.5 S is closely combined to form a heterojunction, which is beneficial to the migration of photogenerated carriers and inhibits the recombination of photogenerated electrons and holes, making Mn 0.5 Cd 0.5 The photocatalytic hydrogen production activity of S solid solution was significantly improved. The novel NiSe / Mn that the present invention uses 0.5 Cd 0.5 S photocatalyst has the advantages of simple preparation, mass preparation, high photocatalytic activity and good stability, which makes it have broad application prospects in the development of clean energy.

Description

technical field [0001] The invention belongs to the field of photocatalyst preparation and application, in particular to a loaded photocatalyst NiSe / Mn 0.5 Cd 0.5 S and its preparation method. Background technique [0002] Combustion products of fossil fuels pose serious environmental problems, and it is a challenge to address the growing global energy shortage by harnessing sustainable energy sources. Since Fujishima A and Honda K first reported TiO in 1972 2 As a semiconductor electrode for photocatalytic hydrogen production, the cleanest energy source—hydrogen can be obtained through solar-driven water splitting. This approach immediately attracted the attention of scientists around the world. TiO 2 It is the most widely studied photocatalyst, but its photocatalytic activity is low due to its wide bandgap (3.2 eV), which limits the absorption of solar energy. In order to maximize the utilization of solar energy, visible light-driven photocatalysts are an important re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057C01B3/04
CPCB01J27/0573B01J35/004C01B3/042Y02E60/36
Inventor 黄彩进蒋昕玮龚海生
Owner FUZHOU UNIV
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