A kind of method that the photocatalytic material containing indium phosphide doped modified tio2 catalytically degrades antibiotic waste water

A photocatalytic material, indium doping technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc. , to achieve the effect of reducing production cost and high degradation rate

Active Publication Date: 2019-05-24
海门市知舟工业设计有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Zhang Jia et al. (Journal of Safety and Environment, 2014, 14, (6): 143-147, Research on electrocatalytic oxidation degradation of sulfadiazine in water) used electrocatalytic oxidation degradation method to degrade sulfadiazine in water, but the high concentration of 50mg / L of sulfadiazine wastewater solution has a low degradation rate, and does not take into account the impact of the remaining organic matter in the wastewater; TiO 2 Photocatalytic oxidation has the advantages of stable properties, non-toxicity, high catalytic activity, and no secondary pollution. Jinan University Liang Fengyan and others (Journal of Ecological Environment 2009,18(4): 1227-1230) reported that TiO 2 Photocatalytic oxidative degradation of sulfadiazine, but it must be carried out under ultraviolet light below 400nm, and the concentration of sulfadiazine that can be degraded is as low as 2mg / L, and the complexity of the components in the actual sulfadiazine wastewater is not considered, such as Containing other intermediates such as acetaldehyde dimethyl acetal, 3-(dimethylamino)acrolein dimethyl acetal or other substances in the wastewater will affect the actual catalytic effect of the catalyst to varying degrees

Method used

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  • A kind of method that the photocatalytic material containing indium phosphide doped modified tio2 catalytically degrades antibiotic waste water
  • A kind of method that the photocatalytic material containing indium phosphide doped modified tio2 catalytically degrades antibiotic waste water
  • A kind of method that the photocatalytic material containing indium phosphide doped modified tio2 catalytically degrades antibiotic waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of Indium Phosphide Doped Modified TiO 2 The photocatalytic material comprises the following steps:

[0040] 1) Dissolve 34.0g of tetrabutyl titanate in 500ml of ethanol and stir evenly to obtain an ethanol solution of tetrabutyl titanate;

[0041] 2) 1.1g of 8-hydroxyquinoline was dissolved in 30ml of ethanol to obtain an ethanol solution of 8-hydroxyquinoline, and 10ml of indium phosphide toluene dispersion (containing indium phosphide 0.29g), and stirred evenly to obtain the first mixed liquid;

[0042] 3) Raise the temperature of the first mixed solution to 60-70°C, adjust the stirring speed to 1000rpm, then add the ethanol solution of tetrabutyl titanate dropwise, and keep stirring for 1-2 hours after the dropwise addition to obtain the second mixed solution;

[0043] 4) Add acetic acid dropwise to the second mixed solution, adjust the pH to 2-3 to obtain a gel-like suspension, stir for 4-6 hours, cool down to 30-40°C and leave to age for 24-48 hours ...

Embodiment 1-A

[0048] Using the single factor variable method to compare and illustrate the influence of 8-hydroxyquinoline as an organic additive on the catalytic performance of the prepared catalytic material, compared with Example 1, the difference is that 8-hydroxyquinoline is not added, and the rest are completely consistent with Example 1 , the prepared product is abbreviated as InP / TiO 2 .

[0049] The scanning electron microscope picture of the photocatalytic material prepared by embodiment 1-A is as follows figure 2 As shown, it can be seen from the figure that the morphology of the photocatalytic material prepared by the present invention is porous particles, and the pore diameter is obviously larger than that of the sample prepared in Example 1; the specific surface area and pore size distribution tester (JW-K type) The specific surface area of ​​the sample was measured, and its specific surface area was only 117.1m 2 / g (BET method).

Embodiment 1-B

[0051] The influence of indium phosphide as an additive on the catalytic performance of the prepared catalytic material is compared and illustrated by the single factor variable method. Compared with Example 1, the difference is that no indium phosphide is added, and the rest are completely consistent with Example 1. The prepared product Abbreviated as 8-HQ / TiO 2 .

[0052] Take sulfadiazine wastewater (wastewater is brown, CODcr=8940mg / L, pH=7.2-7.5; the concentration of sulfadiazine is 42-48mg / L) and filter it with activated carbon to remove solids and colloids, adjust the pH of the filtrate to 6 with hydrochloric acid, and carry out Catalytic oxidation degradation test:

[0053] Get titanium dioxide P25, embodiment 1 product (InP / 8-HQ / TiO 2 ) and its Example 1-A (InP / TiO 2 ) and Example 1-B (8-HQ / TiO 2 20 mg each of the products, respectively placed in 1L of filtrate with pH=6, were subjected to photocatalytic oxidative degradation at 40°C under natural light and ultrav...

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Abstract

The invention belongs to the technical field of prevention and control of organic wastewater, and particularly relates to a method for catalytically degrading antibiotic wastewater with a photocatalytic material containing indium phosphide doping-modified TiO2. The invention provides a photocatalytic material containing indium phosphide doping-modified TiO2. With tetrabutyl titanate as a precursorof TiO2 and indium phosphide and 8-hydroxyquinoline as modifiers, the invention adopts a sol-gel method to prepare the dual-modified TiO2 photocatalytic material. The photocatalytic material preparedby the invention can catalytically and oxidatively degrade sulfadiazine under ultraviolet light and / or sunlight, and moreover, the catalytic material can be recycled, and can be used in high-concentration COD (chemical oxygen demand) wastewater.

Description

technical field [0001] The invention belongs to the technical field of organic sewage prevention and control, in particular to a modified TiO containing indium phosphide 2 Photocatalytic materials for the catalytic degradation of antibiotic wastewater. Background technique [0002] In recent years, the widespread use of antibiotics has caused pollution and harm to the environment that cannot be ignored. According to literature reports, many countries, including China, have detected residual antibiotics in natural water bodies, and the sources are industrial pharmaceutical wastewater, hospital sewage, etc. These trace antibiotics entering the water body will not only cause toxicity to aquatic organisms, but also stimulate pathogenic microorganisms to develop resistance, and even enter the human body through the food chain, thereby causing a huge impact on the entire ecosystem. [0003] Sulfadiazine (SD) is a widely used fungicide, which is a refractory toxic substance mainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18B01J37/08B01J37/03B01J37/02B01J37/34B01J37/06B01J37/12C02F1/30C02F101/38C02F101/34
CPCB01J27/18B01J27/1811B01J35/004B01J37/0201B01J37/031B01J37/06B01J37/086B01J37/12B01J37/343C02F1/30C02F2101/34C02F2101/38C02F2101/40C02F2305/10
Inventor 姬晓青田增亮汪星魏文琦李冬
Owner 海门市知舟工业设计有限公司
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