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Indium-based sulfide composite photocatalyst and preparation method thereof

A technology of sulfide and composite light, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of low hydrogen production of ternary indium-based sulfides, and achieve good product dispersion, Good crystallinity, avoiding structural defects and the effect of introducing impurities

Inactive Publication Date: 2012-03-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention solves the technical problem of low hydrogen production of existing ternary indium-based sulfides, and provides indium-based sulfide composite photocatalysts and preparation methods thereof

Method used

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  • Indium-based sulfide composite photocatalyst and preparation method thereof
  • Indium-based sulfide composite photocatalyst and preparation method thereof
  • Indium-based sulfide composite photocatalyst and preparation method thereof

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specific Embodiment approach 1

[0014] Embodiment 1: The indium-based sulfide composite photocatalyst of this embodiment is made by a one-step hydrothermal method using cadmium salt, zinc salt, indium salt and sulfur source compound, wherein Cd 2+ with Zn 2+ The molar ratio of Cd is 0.11~0.43:1, Cd 2+ with Zn 2+ The sum of the number of moles and In 3+ The molar ratio of Cd is 1:2, Cd 2+ with Zn 2+ The ratio of the sum of the moles of the sulfur source compound to the moles of the sulfur source compound is 1:8.

[0015] The indium-based sulfide composite photocatalyst of this embodiment has better visible light response, and has a strong absorption at about 550nm, and at the same time, the indium-based sulfide composite photocatalyst exhibits higher performance of splitting water to produce hydrogen under visible light , under the light irradiation of λ>400nm, the hydrogen production amount reached 32000μmol·h -1 g -1 ~37000μmol·h -1 g -1 , and the activity of the catalyst did not decrease significa...

specific Embodiment approach 2

[0016] Specific embodiment two: the difference between this embodiment and specific embodiment one is that Cd 2+ with Zn 2+ The molar ratio is 0.15~0.40:1. Others are the same as in the first embodiment.

[0017] More preferred Cd in this embodiment 2+ with Zn 2+ The molar ratio is 0.20:1.

specific Embodiment approach 3

[0018] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the cadmium salt is cadmium chloride, cadmium nitrate, cadmium sulfate or cadmium acetate. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to an indium-based sulfide composite photocatalyst and a preparation method thereof, and is used for solving the technical problem that the existing trinary indium-based sulfide has low hydrogen yield. The indium-based sulfide composite photocatalyst is prepared from cadmium salt, zinc salt, indium salt and sulfur source compounds by a one-step hydrothermal method. The method comprises the following steps of: adding the cadmium salt and the zinc salt to indium salt aqueous solution, stirring until the solution is transparent, adding the sulfur source compound, and stirring to obtain a mixed solution; and transferring the mixed solution to a reaction kettle, maintaining the temperature at 90-140 DEG C for 6-24 hours, cooling, washing and drying to obtain the indium-based sulfide composite photocatalyst. The photocatalyst has hydrogen yield of 32000-37000 mu mol.h<-1>.g<-1> under irradiation of light with wavelength lambda more than 400 nm, has good cycle performance, and can be used for hydrogen preparation based on photocatalytic hydrolysis.

Description

technical field [0001] The invention relates to an indium-based sulfide photocatalyst and a preparation method thereof. Background technique [0002] With the intensification of the contradiction between limited fossil fuels and the sharply increasing energy demand of human beings, as well as the increasingly prominent environmental problems, it is imperative to develop clean and efficient new energy sources. h 2 It has a high combustion value, is odorless and non-toxic, and the combustion products are non-polluting, and it is a renewable energy source. h 2 It can be directly used as fuel for fuel cells to provide power for electric vehicles to solve the current exhaust pollution problem. It can also directly convert hydrogen energy into electrical energy to power electrical appliances. It is a new energy source with broad prospects. And use solar photocatalysis to decompose water to produce hydrogen, convert solar energy with low energy density and strong dispersion into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C01B3/04
CPCY02E60/364Y02E60/36
Inventor 陈刚于耀光王钢周彦松
Owner HARBIN INST OF TECH
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