a black tio 2 Nanomaterials and their preparation methods and applications

A nano-material and black technology, applied in chemical instruments and methods, light water/sewage treatment, titanium oxide/hydroxide, etc., can solve the problems of high energy consumption and high risk of operation process, and achieve simple operation and low cost Effect
CN106892482BActive Publication Date: 2019-09-03ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Publication Date
2019-09-03

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Abstract

The invention provides a black TiO2 nano material. A preparation method of the black TiO2 nano material comprises the following steps: adding water into dried platycladus orientalis leaf fragments, stirring, then filtering, taking filtrate, adding aqueous solution of a Ag precursor, and then stirring for 1-3 hours at the temperature of 50-90 DEG C, so that a mixed solution is obtained; adding TiO2 powder into the obtained mixed solution, stirring for 1-3 hours, then filtering, and washing and drying a filter cake, so that Ag / TiO2 solid powder is obtained; and in a H2 / N2 mixed atmosphere with the volume fraction of H2 being 5-50%, roasting the obtained Ag / TiO2 solid powder for 3-6 hours at the temperature of 450-800 DEG C, so that the product is obtained. According to the invention, hydrogen spillover on the surface of precious metal Ag is utilized for the first time, reduction is carried out under relatively mild conditions for preparing black TiO2, the preparation method is low in cost and simple in operation, and the obtained black TiO2 nano material has the characteristics of high activity, high stability and the like when being used in reaction for photocatalytic degradation of dye wastewater.
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Description

[0001] (1) Technical field

[0002] The present invention relates to a kind of black TiO 2 Nanomaterials and their preparation methods and applications, the invention utilizes hydrogen overflow reduction on the surface of Ag nanoparticles to prepare black TiO with high light conversion efficiency 2 nanomaterials, black TiO 2 Nanomaterials can be used for photocatalytic degradation of dye wastewater.

[0003] (2) Background technology

[0004] Dye pollutants are one of the main sources of global environmental pollution, and the main source of dye wastewater is the large amount of wastewater discharged from the printing and dyeing industry. Due to the high content of organic matter, complex components, and difficulty in degrading this kind of wastewater, traditional treatment methods such as biological treatment, coagulation sedimentation, adsorption and other processes are not ideal for the treatment of dye wastewater, and it is easy to cause secondary pollution. Therefore, i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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