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Supported photocatalyst and preparation method thereof

A photocatalyst, supported technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problem of high cost of precious metals, and achieve enhanced photocatalytic activity, enhanced photocatalytic hydrogen production activity, and stability. Good results

Active Publication Date: 2019-10-08
FUZHOU UNIV
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  • Summary
  • 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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  • Supported photocatalyst and preparation method thereof
  • Supported photocatalyst and preparation method thereof
  • Supported photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 5mmol cadmium acetate·dihydrate and 5mmol manganese acetate·tetrahydrate in a beaker containing 40 mL deionized water and stir to dissolve, then add 10mmol thioacetamide, stir for 30 min, and then transfer the solution to polytetrafluoroethylene The ethylene reactor was lined and sealed in a stainless steel reactor, kept at 160 ℃ for 24 hours, after cooling 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 sample.

Embodiment 2

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

Embodiment 3

[0036] Dissolve 22 μmoL nickel sulfate hexahydrate and 22 μmoL sodium selenite in a beaker containing 40 mL of ethylene glycol solvent, and then add 100 mg of Mn prepared in Example 1 0.5 Cd 0.5 The S solid solution was stirred for 30 minutes and then transferred to a 50 mL polytetrafluoroethylene lining. After the autoclave was sealed, it was kept at 180 ℃ for 24 hours, and finally the temperature was naturally cooled to room temperature. The obtained samples were centrifuged and washed 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 sample.

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Abstract

The invention discloses a supported photocatalyst NiSe / Mn0.5Cd0.5S and a preparation method thereof. The supported photocatalyst is prepared by firstly synthesizing a Mn0.5Cd0.5S solid solution by using a gentle one-step hydrothermal method, and by secondly, enabling the solid solution to react with nickel sulfate hexahydrate and sodium selenite. NiSe and Mn0.5Cd0.5S are tightly combined to form heterojunctions in the composite catalyst, migration of photon-generated carriers can be facilitated, combination of photon-generated electron holes is inhibited, and the photocatalysis hydrogen production activity of the Mn0.5Cd0.5S solid solution can be remarkably improved. The novel NiSe / Mn0.5Cd0.5S photocatalyst disclosed by the invention is simple to prepare, can be massively prepared, is highin photocatalysis activity and good in stability, and has wide application prospects in clean energy development.

Description

Technical field [0001] The invention belongs to the field of photocatalyst preparation and application, and specifically relates to a supported photocatalyst NiSe / Mn 0.5 Cd 0.5 S and its preparation method. Background technique [0002] The combustion products of fossil fuels have brought serious environmental problems. It is a challenge to solve the growing global energy shortage by using sustainable energy sources. Fujishima A and Honda K first reported using TiO 2 As a semiconductor electrode for photocatalytic hydrogen production, hydrogen is the cleanest energy source 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 due to its wide band gap (3.2 eV) and low photocatalytic activity, it limits the absorption of solar energy. In order to maximize the use of solar energy, visible light driving photocatalysts is an important research direction of photocat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C01B3/04
CPCB01J27/0573C01B3/042B01J35/39Y02E60/36
Inventor 黄彩进蒋昕玮龚海生
Owner FUZHOU UNIV
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