Composite photocatalyst DyVO4/g-C3N4B, preparation and application thereof
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A catalyst, composite light technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc.
Active Publication Date: 2020-06-09
ANHUI JINMEI ZHONGNENG CHEM IND +1
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These advanced treatment processes have their own characteristics, but with the influx of refractory substances such as new chemical fibers and imitation silk in chemical industry wastewater, new challenges are posed to existing advanced treatment technologies
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[0029] According to a second aspect of the present invention, a method for preparing a composite photocatalyst is provided, comprising the steps of:
[0031] Wherein, step 1 includes the following steps:
[0032] Step 1-1, dissolving the carbon nitrogen source and the boron source in the dispersant and mixing them evenly;
[0033] Step 1-2, remove dispersant;
[0034] Step 1-3, roasting and post-processing to obtain boron-doped graphitic carbon nitride.
[0035] in,
[0036] Step 1-1 middle,
[0037] The carbon-nitrogen source is a low molecular weight nitrogen-containing organic substance with a carbon-to-nitrogen ratio of 1:2, preferably selected from cyanamide, dicyandiamide, melamine, urea, guanidine hydrochloride, more preferably urea;
[0038] The boron source is selected from boron oxide, boric acid, sodium borate, potassium borate, sodium tetraphenylborate, and potassium tetraphenylborate, preferab...
Embodiment 1
[0093] Take boron-doped graphitic carbon nitride (g-C 3 N 4 B) Sample 1g, and DyVO 4 Mixed grinding (wherein, DyVO 4 The quality of the DyVO 4 and g-C 3 N 4 The ratio of the sum of B masses is 2.9:100);
[0094] After calcination at 550°C for 4 hours in a muffle furnace, and grinding at room temperature, a composite photocatalyst was obtained, which was recorded as 2.9% DyVO 4 / g -C 3 N 4 b.
Embodiment 2
[0096] The present embodiment is the same as the method used in embodiment 1, the difference is only the DyVO used 4 different quality, in this example, DyVO 4 The quality of the DyVO 4 and g-C 3 N 4 The ratio of the sum of B masses is 5.7:100; the resulting product is recorded as 5.7% DyVO 4 / g -C 3 N 4 b.
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Abstract
The invention provides a composite photocatalyst DyVO4 / g-C3N4B, a preparation method and application thereof. According to the invention, the prepared DyVO4 / g-C3N4B, a coagulation precipitation agent,an oxidizing agent, and / or active carbon are cooperatively used to conduct illumination treatment on chemical industry wastewater so as to mineralize organic matters into inorganic matters or convertorganic matters into pollution-free organic matters, so that the treated wastewater effluent meets the requirements of chemical industry reuse water (CODCr is less than 100 mg / L, and chromaticity isless than 10 times), and can be reused in the processes of circulating water, water washing, acid-base dilution and the like in chemical industry enterprises; and the investment cost of photocatalyticoxidation is saved, the effluent quality of wastewater in the chemical industry is ensured, and the method has practical guiding significance for advanced treatment and wastewater reuse of wastewaterin the chemical industry in China.
Description
technical field [0001] The invention relates to the field of photocatalysts, in particular to a composite photocatalyst for treating chemical wastewater and its preparation and application. Background technique [0002] Chemical wastewater causes serious harm to the environment and human health. Therefore, efficient treatment of pollutants in chemical wastewater has become one of the hotspots of research workers. At present, with the substantial increase in the production volume and quality of chemical products, chemical products are developing in the direction of anti-photolysis, anti-oxidation and anti-biodegradation, which makes it more and more difficult to treat wastewater in the chemical industry. [0003] Even if the concentration of residual dyes, phenols and other pollutants in chemical industry wastewater is very low, it will cause serious damage to the ecological environment. Therefore, the advanced treatment of wastewater in the chemical industry has practical a...
Claims
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