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Photocatalyst for preparing hydrogen and sulphur by decomposing hydrogen sulfide and preparation method thereof

A photocatalyst, hydrogen sulfide technology, applied in the preparation/purification of sulfur, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problem of low photocatalytic activity, achieve high catalytic activity, reduce compound probability, improve The effect of absorptivity

Inactive Publication Date: 2010-12-29
HARBIN 6 RING PETROCHEM TECHN DEVCORP
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Problems solved by technology

[0003] The present invention is in order to solve the problem that the existing atomic ratio is Zn: Cd=7: 3 composite photocatalyst ZnIn 2 S 4 -CdIn 2 S 4 To solve the problem of low photocatalytic activity, a photocatalyst for decomposing hydrogen sulfide to produce hydrogen and sulfur and its preparation method are provided

Method used

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  • Photocatalyst for preparing hydrogen and sulphur by decomposing hydrogen sulfide and preparation method thereof
  • Photocatalyst for preparing hydrogen and sulphur by decomposing hydrogen sulfide and preparation method thereof
  • Photocatalyst for preparing hydrogen and sulphur by decomposing hydrogen sulfide and preparation method thereof

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specific Embodiment approach 1

[0008] Specific embodiment one: A kind of photocatalyst that decomposes hydrogen sulfide to produce hydrogen and sulfur in this embodiment is made of ZnIn doped with transition metal ions 2 S 4 -CdIn 2 S 4 , wherein the atomic ratio of zinc to cadmium is 7:3, and the molar ratio of sulfur atoms to transition metal atoms is 1:6×10 -6 ~1.6×10 -4 ; The transition metal is one of Cr, Mn, Fe, Co, Ni, Cu or a combination of several of them.

[0009] When the doped transition metals are a combination of several types, the transition metals are combined in any ratio.

[0010] A photocatalyst that decomposes hydrogen sulfide to produce hydrogen and sulfur in this embodiment adjusts the type and ratio of metal ions by doping, causing lattice defects or changing the crystallinity of the composite photocatalyst, so that its band gap width changes continuously, reducing the electron density. - The recombination probability of hole pairs, thereby improving its absorption rate in the ul...

specific Embodiment approach 2

[0011] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the molar ratio of sulfur atoms and transition metal atoms in the photocatalyst is 1:8×10 -6 ~1.0×10 -4 . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the molar ratio of sulfur atoms to transition metal atoms in the photocatalyst is 1:1.4×10 -5 . Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a photocatalyst for preparing hydrogen and sulphur by decomposing hydrogen sulfide and a preparation method thereof, relating to a photocatalyst and a preparation method thereof. The invention solves the problem that the existing photocatalyst ZnIn2S4-CdIn2S4 the atomic ratio of which is that Zn:Cd=7:3 has low photocatalysis activity. The photocatalyst of the invention is ZnIn2S4-CdIn2S4 doped by transition metal ions. The preparation method comprises: adding sol prepared from transition metal salt, bivalent cadmium salt, bivalent zinc salt, trivalent indium salt and thioacetamide into an autoclave; and carrying out hydrothermal synthesis and vacuum drying to obtain the photocatalyst for preparing the hydrogen and the sulphur by decomposing the hydrogen sulphide. The invention has high catalytic activity; the speed for producing the hydrogen by carrying out photocatalysis on the hydrogen sulphide is 1100-3500 mu mol / h.g which is 1.8-6 times of that obtained by utilizing the ZnIn2S4-CdIn2S4. The photocatalyst of the invention can be used for processing tail gas containing hydrogen sulphide.

Description

technical field [0001] The invention relates to a photocatalyst and a preparation method thereof. Background technique [0002] With the rapid development of the economy, coal, oil and other ore energy sources are becoming increasingly exhausted, and environmental pollution and destruction have also threatened the survival and development of human beings. Hydrogen sulfide (H 2 S) is a harmful gas produced in petroleum refining, natural gas processing and other chemical synthesis processes. If hydrogen sulfide is partially oxidized to water and sulfur, only H 2 Sulfur in S, while hydrogen is oxidized to water, hydrogen resources have not been utilized. The existing 0<x<1 composite photocatalyst Zn x In 2 S 4 -Cd 1-x In 2 S 4 Among them, when x=0.7, the degradation efficiency of the composite photocatalyst is the highest, but the rate of degrading hydrogen sulfide to produce hydrogen is only 400μmol / h·g~600μmol / h·g, and the photocatalytic activity is low. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J27/043B01D53/86B01D53/52C01B3/04C01B17/04
CPCY02E60/364Y02E60/36
Inventor 白雪峰单雯妍刘宁生
Owner HARBIN 6 RING PETROCHEM TECHN DEVCORP
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