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Nb-Rh co-doped titanium dioxide nanorod photocatalyst, and preparation method and application thereof

A photocatalyst and titanium dioxide technology, which is applied in the field of photocatalytic materials, achieves the effects of simple preparation method, easy large-scale commercial production, and improved photocatalytic hydrogen production activity

Active Publication Date: 2018-08-28
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few applications in the world that directly use solar energy to split water to obtain clean energy.

Method used

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  • Nb-Rh co-doped titanium dioxide nanorod photocatalyst, and preparation method and application thereof
  • Nb-Rh co-doped titanium dioxide nanorod photocatalyst, and preparation method and application thereof
  • Nb-Rh co-doped titanium dioxide nanorod photocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0069] Niobium pentachloride and rhodium trichloride hydrate with a rhodium content of 40% were dissolved in ethanol respectively to prepare 0.05M niobium pentachloride ethanol solution and 0.01M rhodium trichloride ethanol solution.

Embodiment 1

[0071] About 1mL of hydrochloric acid, 0.13mL of the 0.05M niobium pentachloride prepared in the above preparation example 1, 1mL of the 0.01M rhodium trichloride prepared in the above preparation example 1 and 3.4g of butyl titanate were added to 20mL of anhydrous In the ethanol solution, stir to accelerate the dissolution and form a transparent solution, then add 3-5mL of high-purity water, and continue stirring until a gel is formed. The gel was poured into 10M NaOH solution and stirred to disperse, filtered and redispersed into 10M NaOH solution, and then hydrothermally reacted at 150°C for 100h. The cooled product was washed several times with pure water, dilute nitric acid, pure water, and absolute ethanol in sequence, then dried in an oven at 70°C for 20 hours, and then put into a muffle furnace for calcination at 450°C for 4 hours to obtain Nb-Rh co-doped Doped TiO 2 Nanorods - Ti 0.999 Nb 0.0005 Rh 0.0005 o 2 Nano stave.

[0072] The results show that: the Nb-Rh...

Embodiment 2

[0075] About 1mL of hydrochloric acid, 0.13mL of the 0.05M niobium pentachloride prepared in the above preparation example 1, 10mL of the 0.01M rhodium trichloride prepared in the above preparation example 1 and 3.4g of butyl titanate were added to 20mL of anhydrous In the ethanol solution, stir to accelerate the dissolution and form a transparent solution, then add 3-5mL of high-purity water, and continue stirring until a gel is formed. The gel was poured into 10M NaOH solution and stirred to disperse, filtered and redispersed into 10M NaOH solution, and then hydrothermally reacted at 150°C for 100h. The cooled product was washed several times with pure water, dilute nitric acid, pure water, and absolute ethanol in sequence, then dried in an oven at 70°C for 20 hours, and then put into a muffle furnace for calcination at 450°C for 4 hours to obtain Nb-Rh co-doped Doped TiO 2 Nanorods - Ti 0.99 Nb 0.0005 Rh 0.0095 o 2 Nano stave.

[0076] The results show that: the Nb-Rh...

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Abstract

The invention discloses a Nb-Rh co-doped titanium dioxide nanorod photocatalyst, and a preparation method and application thereof. The photocatalyst of the invention has the following advantages: 1) the photocatalyst prepared in the invention has a one-dimensional rod structure and is effectively improved in photocatalytic hydrogen production activity compared with a common photocatalyst; 2) the preparation method of the photocatalyst is simple and can easily realize large-scale commercial production; 3) the photocatalyst can be reused, and the catalytic activity of the Nb-Rh co-doped titaniumdioxide nanorod photocatalyst is free of obvious decline after reuse 20 times or more; and 4) the Nb-Rh co-doped TiO2 nanorod photocatalyst has high catalytic activity, e.g., a Ti<0.996>Nb<0.002>Rh<0.002>O<2> nanorod photocatalyst has a hydrogen production rate of up to 7.58 mmol / g.h in photolysis of water, which is 194 times the hydrogen production rate (0.039 mmol / g.h) of TiO2 nanorods preparedunder the same conditions.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a Nb-Rh co-doped titania nanorod photocatalyst and its preparation method and application. Background technique [0002] Titanium dioxide is currently recognized as one of the most efficient catalytic materials for photocatalytic reactions. Due to the continuous development and utilization of fossil fuels such as coal, oil, and natural gas, it has caused a large amount of energy consumption and serious environmental pollution. Hydrogen, as a clean If energy can be utilized by people, it will have important research significance. [0003] Photolysis of water refers to the direct decomposition of water into hydrogen and oxygen under the irradiation of sunlight. It is an effective method of using solar energy to produce hydrogen. How to use solar energy to split water to produce hydrogen has attracted worldwide attention. Among them, photocatalysts for water splitt...

Claims

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Application Information

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IPC IPC(8): B01J23/648B82Y40/00B82Y30/00C01B3/04
CPCB82Y30/00B82Y40/00C01B3/042B01J23/002B01J23/6484C01B2203/1064B01J2523/00B01J35/39B01J2523/47B01J2523/56B01J2523/822Y02E60/36
Inventor 郭旺黄集权李国京薛垂兵黄秋凤邓中华刘著光
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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