Photocatalytic coating having zinc oxide/titanium dioxide heterostructure and preparation method and application of photocatalytic coating with zinc oxide/titanium dioxide heterostructure

A heterogeneous structure, nano-titanium dioxide technology, applied in the field of photocatalytic materials, can solve the problems of poor controllability of reaction conditions, achieve effective control of morphology and microscopic size, large spectral absorption range, and improve efficiency

Active Publication Date: 2018-12-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the preparation method obtained self-assembled TiO 2 -ZnO nanostructure, but only suitable for small-scale preparation, and the controllability of reaction conditions is poor

Method used

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  • Photocatalytic coating having zinc oxide/titanium dioxide heterostructure and preparation method and application of photocatalytic coating with zinc oxide/titanium dioxide heterostructure
  • Photocatalytic coating having zinc oxide/titanium dioxide heterostructure and preparation method and application of photocatalytic coating with zinc oxide/titanium dioxide heterostructure
  • Photocatalytic coating having zinc oxide/titanium dioxide heterostructure and preparation method and application of photocatalytic coating with zinc oxide/titanium dioxide heterostructure

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Embodiment 1

[0053] In this embodiment, the base material is selected as a 316L stainless steel sheet with a thickness of about 2mm, and the ZnO / TiO 2 The thickness of the composite coating is about 5 μm, where TiO 2 The mass ratio of ZnO to ZnO is 1:20, and the coating is a loose surface covered by stacking of ZnO crystal grains and P25 particles. In this example, using P25 as the raw material, after the plasma spraying process, the titanium dioxide particles in the coating are uniformly dispersed nanoparticles, accompanied by a small amount of submicron-sized particles obtained by heating, melting and sintering. The composite micro-nanostructured ZnO / TiO 2 The coating preparation process is as follows figure 1 As shown, the specific preparation method is as follows:

[0054] 1. First, commercially available Zn(CH 3 COO) 2 2H 2 O is added in dehydrated alcohol and deionized water equivolume ratio solvent, stir, be made into the zinc acetate solution of 0.5mol / L, adjust the pH value ...

Embodiment 2

[0060] In this embodiment, the base material is selected as a 316L stainless steel sheet with a thickness of about 2mm, and the ZnO / TiO 2 The thickness of the composite coating is about 5 μm, where TiO 2 The mass ratio of ZnO to ZnO is 1:10, and the coating is a loose surface formed by stacking ZnO grains and P25 particles, wherein the ZnO grain size ranges from 10 to 50nm. The composite micro-nanostructured ZnO / TiO 2 The specific preparation method is as follows:

[0061] 1. First, commercially available Zn(CH 3 COO) 2 2H 2 O is added to absolute ethanol and deionized water in equal volume ratio solvents, stirred evenly, and made into a 0.5mol / L zinc acetate solution, and the pH value of the above solution is adjusted to about 6 with glacial acetic acid. After the solution is clarified, the The tensio-active agent polyethylene glycol (PEG400) of zinc salt quality 0.18wt% joins in the solution, stirs, and Zn(CH 3 COO) 2 2H 2 O mass ratio is 3.6wt% nano titanium dioxide...

Embodiment 3

[0065] In this embodiment, the base material is selected as a 316L stainless steel sheet with a thickness of about 2mm, and the ZnO / TiO 2 The thickness of the composite coating is about 5 μm, where TiO 2 The mass ratio of ZnO to ZnO is 1:5, and the coating is a loose surface formed by stacking ZnO grains and P25 particles, wherein the ZnO grain size ranges from 10 to 50nm. The composite micro-nanostructured ZnO / TiO 2 The specific preparation method is as follows:

[0066] 1. First, commercially available Zn(CH 3 COO) 2 2H 2 O was added to solvents with an equal volume ratio of absolute ethanol and deionized water, stirred evenly, and made into a 0.5mol / L zinc acetate solution, and the pH value of the above solution was adjusted to 6 with glacial acetic acid. After the solution was clarified, zinc The surfactant polyethylene glycol (PEG400) of salt quality 0.36wt% joins in the solution, stirs, and Zn(CH 3 COO) 2 2H 2 The nano-titanium dioxide powder (P25) with a mass ra...

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Abstract

The invention discloses a photocatalytic coating having a ZnO/TiO2 heterostructure and a preparation method of the photocatalytic coating having the ZnO/TiO2 heterostructure. The photocatalytic coating comprises a ZnO stack cluster formed by stacking nano ZnO crystal grains having a diameter of 10 to 50 nm, and nano TiO2 particles embedded in the ZnO stack cluster, wherein the ZnO stack cluster has a cluster structure, has a loose porous structure, and has a diameter of 3 to 30 mum. The photocatalytic coating is prepared by a thermal spraying process in one step, and the morphology and microscopic size of a product are controllable. The photocatalytic coating disclosed by the invention has high binding force with a matrix and has a larger spectral absorption range, and obvious improvementon efficiency of photocatalytic degradation of pollutants such as organic dyes.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a photocatalytic coating with a zinc oxide / titanium dioxide heterostructure and a preparation method and application thereof. Background technique [0002] Although the earth's surface is covered with nearly 70% of the water, fresh water resources only account for 2.8%, except for the 75% stored in the polar glaciers that are difficult to use, the amount of fresh water available to humans is still less than 1% of the total water on the earth, and these Precious water resources have been threatened by pollution and waste for a long time, and many drinking water purification technologies and sewage treatment technologies have been developed one after another. Among various purification methods, photocatalytic technology, as a method that can use solar energy to drive catalytic reactions, has high efficiency, low energy consumption, wide application range and deep o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J35/10C02F1/30C02F103/30
CPCB01J23/002B01J23/06B01J35/004B01J35/10C02F1/30C02F2103/30C02F2305/10
Inventor 谌宽黄晶付耀耀翟梦娇龚永锋刘奕李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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