Gold nanocluster-gold nanoparticle-titanium dioxide compound photocatalyst and application thereof

A gold nanocluster and gold nanoparticle technology, which is applied in the application field of gold nanocluster-gold nanoparticle-titanium dioxide composite photocatalyst and photo-splitting water for hydrogen production, can solve problems such as restricting the practical application of titanium dioxide, and achieves the Conducive to sustainable development, simple preparation method, and high photocatalytic activity

Inactive Publication Date: 2016-01-06
FUZHOU UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0004] Titanium dioxide is regarded as an ideal photocatalyst due to its advantages of non-toxicity, good chemical stability, strong oxidation ability, and low cost, but it only absorbs in the ultraviolet region, and its high recombination efficiency of photogenerated carriers greatly limits Practical application of titanium dioxide in photocatalytic solar energy conversion

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  • Gold nanocluster-gold nanoparticle-titanium dioxide compound photocatalyst and application thereof
  • Gold nanocluster-gold nanoparticle-titanium dioxide compound photocatalyst and application thereof
  • Gold nanocluster-gold nanoparticle-titanium dioxide compound photocatalyst and application thereof

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preparation example Construction

[0025] A kind of gold nanocluster-gold nanoparticle-titanium dioxide composite photocatalyst, its preparation method comprises the following steps:

[0026] 1) Dissolve chloroauric acid in water, add reduced glutathione equal to the weight of chloroauric acid, stir until colorless, then reflux at 70°C for 24 hours, add acetonitrile for purification, centrifuge, wash and dry to obtain Solid gold nanoclusters, redispersing the obtained solid gold nanoclusters into water to obtain a gold nanocluster solution;

[0027] 2) According to the weight ratio of titanium dioxide nanoparticles and solid gold nanoclusters of 100:1~100:5, the solution of titanium dioxide nanoparticles and gold nanoclusters was mixed and stirred for 4 hours under weakly acidic conditions with a pH value of 4, centrifuged, Washing and drying to obtain a gold nanocluster-titanium dioxide composite material;

[0028] 3) Add 8mL of lactic acid as a sacrificial agent to the composite material obtained in step 2) ...

Embodiment 1

[0041]Dissolve 0.24g of chloroauric acid in 300mL of water, add 0.276g of reduced glutathione and stir until colorless, then reflux at 70°C for 24 hours, add 900mL of acetonitrile to purify after cooling, centrifuge, wash and dry the obtained The solid is redispersed into water to obtain a gold nanocluster solution; the weight ratio of the titanium dioxide nanoparticles to the solid gold nanoclusters is 100:3, the titanium dioxide nanoparticles are immersed in the gold nanocluster solution, and the pH value of the solution is adjusted to 4. Stir for 4 hours, centrifuge, wash, dry and grind to obtain a gold nanocluster-titanium dioxide composite material. The obtained gold nanocluster-titanium dioxide composite material was irradiated for 3 hours under the conditions of simulating sunlight, vacuum atmosphere, and adding lactic acid as a sacrificial agent. Particles to obtain a gold nanocluster-gold nanoparticle-titanium dioxide composite photocatalyst. The average particle siz...

Embodiment 2

[0043] Dissolve 0.24g of chloroauric acid in 300mL of water, add 0.276g of reduced glutathione and stir until colorless, then reflux at 70°C for 24 hours, add 900mL of acetonitrile to purify after cooling, centrifuge, wash and dry the obtained The solid is redispersed in water to obtain a gold nanocluster solution; the weight ratio of the titanium dioxide nanoparticles to the solid gold nanoclusters is 100:1, the titanium dioxide nanoparticles are immersed in the gold nanocluster solution, and the pH value of the solution is adjusted to 4. Stir for 4 hours, centrifuge, wash, dry and grind to obtain a gold nanocluster-titanium dioxide composite material. The obtained gold nanocluster-titanium dioxide composite material was irradiated for 60 hours under the conditions of simulating sunlight, vacuum atmosphere, and adding lactic acid as a sacrificial agent. Particles to obtain a gold nanocluster-gold nanoparticle-titanium dioxide composite photocatalyst. The average particle siz...

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Abstract

The invention discloses a gold nanocluster-gold nanoparticle-titanium dioxide compound photocatalyst and application thereof. The gold nanocluster-gold nanoparticle-titanium dioxide compound photocatalyst having different particle sizes is firstly obtained by preparing a gold nanocluster solution based on chloroauric acid and a reducing type glutathione as raw materials and carrying out an impregnation method and illumination condition control on gold nanocluster solution and titanium dioxide nanoparticles. The gold nanocluster-gold nanoparticle-titanium dioxide compound photocatalyst is simple in preparation method without high temperature and high pressure conditions; compared with the existing gold nanocluster-titanium dioxide and gold nanoparticle-titanium dioxide catalysts, the gold nanocluster-gold nanoparticle-titanium dioxide compound photocatalyst disclosed by the invention is higher in photocatalytic efficiency and hydrogen production efficiency, can be used for hydrogen production by photolysis of water, and is beneficial to sustainable development of environments and energy sources.

Description

technical field [0001] The invention belongs to the field of catalyst preparation and the sustainable development of environment and energy, and specifically relates to a gold nanocluster-gold nanoparticle-titanium dioxide composite photocatalyst with controllable nano-gold particle size and its application in photolysis of water to produce hydrogen . Background technique [0002] The energy crisis and environmental pollution caused by excessive use of fossil fuels have drawn more attention to green and sustainable photocatalytic solar energy conversion technologies. Among them, the hydrogen production technology by photolysis of water is considered to be a high-quality choice to replace fossil fuels due to its advantages of no pollution, mild conditions, and renewability. Therefore, it is a major challenge in the field of photocatalysis to design and construct photocatalysts that can efficiently absorb solar energy and have good conversion efficiency of photogenerated carr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J37/34C01B3/04
CPCY02E60/36
Inventor 徐艺军刘思奇
Owner FUZHOU UNIV
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