Nano flower-like composite catalyst and its preparation method and application
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A composite catalyst, nanoflower technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as short process flow, and achieve the effects of short process flow, short time and high preparation yield
Active Publication Date: 2021-10-29
DATANG ENVIRONMENT IND GRP +1
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Problems solved by technology
[0011] In order to solve the above problems, the purpose of the present invention is to provide a nano flower-like composite catalyst, which has excellent photocatalytic degradation ability of organic pollutants under photocatalytic conditions, has good visible light response ability, and satisfies the strong oxidation catalytic oxidation system at the same time. The demand for catalyst characteristics, and has good stability and reusability, has a large specific surface area and service life, and has both adsorption and catalytic synergies, and is an environmentally friendly material; the invention also provides a nano The preparation method of the flower-shaped composite catalyst realizes preparation by a one-step hydrothermal method, the process is simple, the process is short, the yield is high, and the raw materials are cheap and easy to obtain; the invention also provides an application of the nano-flower-shaped composite catalyst
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Embodiment 1
[0058] Prepare a kind of nano flower shape composite catalyst, comprises the following steps:
[0059] (1) Mix 10 ml of butyl titanate, 35 ml of absolute ethanol, 4 ml of glacial acetic acid, 3 mmol of sodium molybdate, 6 mmol of thioacetamide and 30 ml of oleic acid to obtain a mixed reaction solution, and additional Adjust the pH with glacial acetic acid so that the pH of the mixed reaction solution is 3.0;
[0060](2) Transfer the mixed reaction solution obtained in step (1) to a Teflon reactor, and place it in a muffle furnace for closed reaction. The reaction temperature is 200°C, and the reaction time is 25 h;
[0061] (3) Cool the reaction kettle to room temperature, take out the reaction solution, separate the black solid by high-speed centrifugation at 13,000 r / min, wash it with pure water, put the black solid in a drying oven, and dry at a constant temperature of 105±5°C for 10 h;
[0062] (4) Put the dried solid in a muffle furnace, keep the volume content of oxyge...
Embodiment 2
[0064] Embodiment 2 is basically the same as Embodiment 1, the only difference is:
[0065] Adjust the raw material addition amount in embodiment 2, make the TiO in the catalyst that embodiment 2 prepares 2 with MoS 2 The molar ratio is 1:2.
Embodiment 3
[0067] Embodiment 3 is basically the same as Embodiment 1, the only difference is:
[0068] Adjust the amount of raw material added in embodiment 3, so that in the catalyst prepared in embodiment 3, TiO 2 with MoS 2 The molar ratio is 1:1.
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Abstract
The invention relates to the field of environmental protection, in particular to a nano flower-shaped composite catalyst and its preparation method and application. The preparation method includes: mixing butyl titanate, ethanol, glacial acetic acid, sodium molybdate, thioacetamide and oleic acid to obtain a mixed reaction liquid, performing a reaction, separating after the reaction is completed, drying the separated solid, and drying the separated solid in an oxygen volume Calcination and activation under anaerobic conditions with a content of 3%-8%, and then grinding to obtain the nanoflower-like composite catalyst. The preparation method realizes the preparation by one-step hydrothermal method, the process is simple, and the yield is high; the prepared catalyst has excellent photocatalytic degradation ability of organic pollutants in catalytic ozonation reaction and photocatalytic conditions, and has good catalytic Ozone oxidation and visible light response ability, good stability and reusability, large specific surface area and service life, good adsorption and catalytic synergistic efficiency, belong to environment-friendly materials.
Description
technical field [0001] The invention relates to the field of environmental protection, in particular to a nano flower-shaped composite catalyst and its preparation method and application. Background technique [0002] The secondary pollution caused by the environmental treatment process is a problem that cannot be ignored in the environmental protection industry, especially the treatment process using chemical methods, excessive addition of chemical reagents or by-products of chemical reactions will cause potential pollution to the environment. Compared with other advanced oxidation technologies, photocatalytic oxidation technology has outstanding advantages, and has long been regarded as an environmentally friendly treatment technology. However, the single photocatalytic reaction has a low yield of strong oxidizing active substances and low efficiency in the degradation of organic matter, which are the main factors restricting the large-scale application of photocatalytic t...
Claims
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