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Photocatalyst for producing hydrogen through photocatalytic water splitting and preparation method thereof

A water splitting and photocatalysis technology, applied in the chemical industry, can solve the problems of expensive equipment and poor catalytic effect of photocatalysts, and achieve the effects of improving utilization rate, facilitating large-scale promotion, and mild synthesis conditions

Inactive Publication Date: 2016-12-07
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a cocatalyst for photocatalytic water splitting to produce hydrogen and a preparation method thereof. The cocatalyst and its preparation method for photocatalytic water splitting The photocatalytic effect of the photocatalytic water splitting hydrogen production in the prior art is not good, and the equipment used is expensive technical problem

Method used

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  • Photocatalyst for producing hydrogen through photocatalytic water splitting and preparation method thereof
  • Photocatalyst for producing hydrogen through photocatalytic water splitting and preparation method thereof
  • Photocatalyst for producing hydrogen through photocatalytic water splitting and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] The preparation steps of the present invention are as follows: 1ml of potassium chloroplatinite (K 2 PtCl4 20.0Mm), 1ml of nickel acetylacetonate (Ni(acac) 2 20.0Mm) solution, 160mg polyvinylpyrrolidone (PVP) and 0.5mmol NaI were dissolved in 10ml of N,N-dimethylformamide solution, ultrasonically dispersed evenly, transferred to a 25mL autoclave, and the solution was heated at 150°C Under the condition of hydrothermal reaction for 5 hours. The product is cleaned with a mixed solution of ethanol and acetone (V / V=1:3) by ultrasonication, centrifugation at 8000 rpm, and NaBH 4 / TBA and then washed to obtain nanoparticles for the characterization test of the experiment. The mass ratio of Pt and Ni is 2:1, 3:1, 4:1, adding potassium chloroplatinite (K 2 The amount of PtCl4 20.0Mm) is 2ml, 3ml, 4ml.

[0020] The above-prepared unwashed Pt-Ni nanoparticles were loaded onto the commercial CdS surface uniformly dispersed by ultrasound, wherein the loading amount of Pt-Ni wa...

Embodiment 2

[0021] Embodiment 2 electrocatalytic hydrogen evolution performance test

[0022] The electrochemical test analysis is completed on the CHI660E electrochemical workstation, using a three-electrode test system. The preparation method of the working electrode: the unwashed Pt-Ni nanoparticles prepared above are added dropwise and deposited onto the surface of the nano-carbon powder uniformly dispersed by ultrasonic waves, wherein the loading of Pt-Ni is 20wt% of the nano-carbon powder, and kept stirring state for 2 hours, then the sample was subjected to suction filtration, NaBH4 / TBA cleaning, vacuum drying and grinding, and finally the PtNi / nano-carbon powder composite catalyst was prepared for electrocatalytic hydrogen evolution performance test, and 2mg of PtNi / nano-carbon powder was weighed , dissolved in 400 μL deionized water, 600 μL ethanol and 120 μL 5% Nafion solution, and ultrasonically dispersed for 10 minutes. Take 5 μL of the sample solution and drop it on the glas...

Embodiment 3

[0024] Example 3 Photocatalytic hydrogen production under visible light:

[0025] The light source of the photocatalytic activity test reaction is a 300W Xe lamp, and the infrared light part is removed by the cooling circulating water above the reactor, and the ultraviolet light part is removed by a 420nm filter. At room temperature, add a certain amount of deionized water, methanol as a sacrificial agent, and 0.05 g of CdS photocatalyst loaded with 0.5 wt% Pt-Ni into the reactor. After stirring for a while, connect the reactor to the hydrogen production reaction system by photolysis of water , to pump out the air in the system. Using visible light with a wavelength greater than 420nm as the light source, the hydrogen production was measured at regular intervals to study its photocatalytic activity.

[0026] like image 3 Shown is the visible-light photocatalytic activity rate of hydrogen production under the above conditions with the cocatalyst of Pt and Ni alloy nanopartic...

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Abstract

The invention provides a cocatalyst for producing hydrogen through photocatalytic water splitting. The cocatalyst is composed of Pt and Ni, wherein the mass ratio of Pt to Ni is (1-4):1. The invention further provides a preparation method of the cocatalyst. The method comprises the steps that potassium tetrachloroplatinate, nickel acetylacetone, polyvinylpyrrolidone and sodium iodide are weighed, dissolved in N,N-dimethylformamide, subjected to uniform ultrasonic dispersion and transferred into a high pressure reactor, the solution undergoes a hydrothermal reaction at the temperature of 150 DEG CC, the product is subjected to ultrasound treatment and centrifugal cleaning with a mixed solution of ethanol and acetone and washed again with NaBH4 / TBA, and after CdS is loaded, a photocatalyst loaded with the PtNi alloy cocatalyst is obtained. A hydrothermal method is adopted for controlling synthesis of different Pt-Ni ratios, the method is simple, feasible and high in efficiency, the synergistic effect among different kinds of metal is utilized, and the photocatalytic activity of the catalyst reaches two times or above compared with a catalyst prepared through a traditional method.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a co-catalyst, in particular to a co-catalyst for photocatalytically decomposing water to produce hydrogen and a preparation method thereof. Background technique [0002] Energy shortage is a major challenge facing mankind at present, and it is a major issue that must be considered first in the implementation of sustainable development strategies in my country. As one of the main forms of new energy, the research, development and application of hydrogen energy has attracted widespread attention. Using photocatalytic technology to decompose water to produce hydrogen and make full use of cheap and abundant sunlight is an important way to solve the current global environmental pollution and energy crisis. Contents of the invention [0003] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a cocatalyst for photocatalytic water splitting...

Claims

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Application Information

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IPC IPC(8): B01J27/045B01J23/89C01B3/04
CPCC01B3/042B01J23/892B01J27/045C01B2203/107C01B2203/0277B01J35/39Y02E60/36
Inventor 姚伟峰段丽璇陆盼
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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