an alpha-fe 2 o 3 -zno/gangue composite photocatalyst and preparation method and application thereof

A technology of -fe2o3-zno and coal gangue, which is applied in the field of photocatalyst preparation and can solve problems that have not been reported yet
CN108435186BActive Publication Date: 2021-02-05HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2021-02-05

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Abstract

The present invention relates to a kind of α-Fe 2 o 3 ‑ZnO / coal gangue composite photocatalyst, which comprises the following raw materials prepared by boiling reflux: pretreated coal gangue, an aqueous solution of zinc salt and an aqueous solution of iron salt; Fe in the aqueous solution of iron salt 3+ Zn in an aqueous solution of ions and zinc salts 2+ The molar ratio of ion is 2:1~10, and Zn in the aqueous solution of described zinc salt 2+ The mass ratio of the moles of ions to the pretreated gangue is 0.002 mol:5 g. The present invention also relates to a method for preparing the composite photocatalyst and its application. The product of the invention can effectively degrade chlorophenol compounds under the condition of ultraviolet-visible light. The preparation method of the invention has the characteristics of less raw materials, simple process, short reaction time, relatively mild conditions and no pollution to the environment, is a green synthesis process, and is easy to realize industrialization.
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Description

technical field

[0001] The invention belongs to the field of photocatalyst preparation, in particular to an α-Fe 2 o 3 -ZnO / coal gangue composite photocatalyst, its preparation method and its application in the degradation of chlorophenol compounds. Background technique

[0002] Photocatalytic technology can directly use light energy to degrade organic pollutants into small inorganic molecules under normal temperature and pressure, and has the characteristics of low energy consumption, simple operation, mild reaction conditions, and small secondary pollution. It is an ideal environmental pollution governance technology. In today's increasingly tense fossil energy and increasingly serious environmental pollution, the importance of photocatalytic technology is self-evident, and its core is to research and develop photocatalysts with excellent performance.

[0003] The common photocatalytic material is TiO 2 , SnO 2 , CdS, WO 3 , ZrO 2 and Fe 2 o 3 and other n-type sem...

Claims

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