Preparation method and application of precious metal-modified CdS nanorod photocatalyst

A technology of photocatalysts and precious metals, applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc., can solve the problems of complex preparation process of photocatalysts for splitting water and low utilization rate of precious metals, and achieve mild conditions and easy preparation The effect of simple process and low precious metal content

Active Publication Date: 2015-09-23
HUAIBEI NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

[0006] The present invention aims to provide a novel preparation method of noble metal (Pt, Pd or Ru) modified CdS nanorod photocatalyst and the application of visible light splitting water to generate hydrogen. The technical problem to be solved is the complexity of the existing photocatalyst preparation process. and low utilization of precious metals

Method used

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  • Preparation method and application of precious metal-modified CdS nanorod photocatalyst
  • Preparation method and application of precious metal-modified CdS nanorod photocatalyst
  • Preparation method and application of precious metal-modified CdS nanorod photocatalyst

Examples

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Embodiment 1

[0054] In this example, Pt (0.06wt.%) modified CdS nanorods were synthesized in one step as follows:

[0055] Take 1g H 2 PtCl 6 ·6H 2 O reagent was dissolved in 37.5mL water to obtain a Pt precursor solution (0.0515mol / L);

[0056] Weigh 4.66g of analytically pure cadmium nitrate tetrahydrate and 3.45g of thiourea into a 100mL cylindrical polytetrafluoroethylene container with an electronic balance, then add 60mL of analytically pure ethylenediamine, stir vigorously until dissolved, and obtain a raw material solution;

[0057] While stirring, use a pipette to pipette a certain amount of 130 μL of the above Pt precursor solution into the raw material solution, and then quickly add 0.20 g of analytically pure NaBH while continuing to stir 4 Reagent, a light yellow solution was obtained. Finally, seal the polytetrafluoroethylene container, put it into a stainless steel hydrothermal kettle, and heat-treat it in a blast drying oven at 160°C for 48h. After naturally cooling to...

Embodiment 2

[0060] This example synthesizes Pt (0.06wt.%) modified CdS nanorods according to the following steps:

[0061] The specific steps of this embodiment are the same as in Example 1, the only difference is that NaBH is not added in the preparation process 4 .

[0062] The sample obtained in this embodiment is marked as No NaBH 4 , Pt / CdS-N.

Embodiment 3

[0064] This embodiment synthesizes CdS nanorods without noble metal modification according to the following steps:

[0065] The specific steps of this embodiment are the same as those in Example 1, the only difference being that no precious metal solution and NaBH were added during the preparation process. 4 .

[0066] The sample obtained in this example is denoted as CdS-N.

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Abstract

The invention discloses a preparation method and an application of a precious metal-modified CdS nanorod photocatalyst. The photocatalyst consists of precious metal (Pt, Pd or Ru) and nanorod-shaped CdS, and the formation of nanorod-shaped CdS and the depositional modification of precious metal are implemented by a one-pot solvothermal method. The photocatalyst disclosed by the invention has a nanorod-shaped morphology, and can show high-efficient, stable activity in producing hydrogen by decomposing water under visible light when the precious metal content is only 0.06wt.percent. The catalyst preparation process is simple, the required precious metal content is far lower than the precious metal contents of reported products, the catalyst cost is greatly reduced, and the obtained sample has high-efficient, stable activity in producing hydrogen by decomposing water under visible light.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to the one-step preparation of a low-content noble metal-modified nano-rod-shaped CdS photocatalyst and the research on photocatalytic decomposition of water to produce hydrogen under visible light. Background technique [0002] The energy crisis caused by the depletion of fossil energy and the environmental pollution caused by the large-scale use of fossil energy are two major problems facing the sustainable development of the world today. Hydrogen energy is considered to be an ideal solution to these two problems due to its advantages of cleanliness, wide sources, and high combustion calorific value. The development of clean, efficient and sustainable new energy represented by hydrogen energy is of great significance to the sustainable development of the world and China. [0003] As a typical secondary energy source, hydrogen in a single state rarely exists in natu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/045B01J35/02C01B3/04
CPCY02E60/36
Inventor 付先亮张莉王静慧陈士夫
Owner HUAIBEI NORMAL UNIVERSITY
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