CN111659433A - Composite photocatalysis for organic compound wastewater treatment - Google Patents
Composite photocatalysis for organic compound wastewater treatment Download PDFInfo
- Publication number
- CN111659433A CN111659433A CN202010647645.XA CN202010647645A CN111659433A CN 111659433 A CN111659433 A CN 111659433A CN 202010647645 A CN202010647645 A CN 202010647645A CN 111659433 A CN111659433 A CN 111659433A
- Authority
- CN
- China
- Prior art keywords
- sic
- wastewater treatment
- organic compound
- cdla2s4
- composite photocatalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- 239000002131 composite material Substances 0.000 title abstract description 17
- 238000004065 wastewater treatment Methods 0.000 title abstract description 9
- 150000002894 organic compounds Chemical class 0.000 title abstract description 8
- 230000001699 photocatalysis Effects 0.000 title description 6
- 238000007146 photocatalysis Methods 0.000 title description 3
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000001354 calcination Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000011941 photocatalyst Substances 0.000 abstract description 18
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000002194 synthesizing effect Effects 0.000 abstract description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 14
- 229910020851 La(NO3)3.6H2O Inorganic materials 0.000 description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 7
- QOYRNHQSZSCVOW-UHFFFAOYSA-N cadmium nitrate tetrahydrate Chemical compound O.O.O.O.[Cd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QOYRNHQSZSCVOW-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- -1 CdLa2S4 Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/20—Carbon compounds
- B01J27/22—Carbides
- B01J27/224—Silicon carbide
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a composite photocatalyst for organic compound wastewater treatment, which is prepared by synthesizing a composite photocatalyst matrix substance CdLa2S4 in one step by a hydrothermal method and preparing the composite photocatalyst with regular appearance by a calcination method.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a composite photocatalyst for organic compound wastewater treatment.
Background
1. In recent years, with the rapid development of industrial production, the problem of environmental pollution has been receiving general attention. With the continuous improvement of the technology for treating industrial pollution, the research of the photocatalytic technology, namely the photocatalytic degradation technology for pollutants by utilizing solar energy, on the aspect of environmental treatment is more and more intensive.
2. Another way to study photocatalysts is to find new photocatalysts. At present, the development of semiconductor compounds for photocatalysis is no longer to search for semiconductor compounds existing in nature, but tends to artificially synthesize semiconductor compounds such as CdLa2S4, etc., however, the photocatalytic efficiency of the compound used as photocatalyst is not high.
3. Therefore, there is a need to develop a composite photocatalyst which has good photocatalytic effect for reducing organic compound wastewater treatment.
Disclosure of Invention
The invention discloses a composite photocatalyst for organic compound wastewater treatment, which is prepared by synthesizing a composite photocatalyst matrix substance CdLa2S4 in one step by a hydrothermal method and preparing the composite photocatalyst with regular appearance by a calcination method.
To achieve the purpose, the invention provides a composite photocatalyst for preparing organic compound wastewater treatment, which comprises the following components in percentage by weight: the composite photocatalyst comprises SiC and CdLa2S4, wherein the weight fraction of the SiC is 0.1-20% based on the weight of CdLa2S4, and the method is characterized by comprising the following steps:
1. the preparation of CdLa2S4 comprises the following substeps:
(1-1) placing Cd (NO3) 2.4H 2O, La (NO3) 3.6H 2O and thiourea into water, wherein the molar amount of Cd (NO3) 2.4H 2O is the molar amount of Cd elements, the molar amount of La (NO3) 3.6H 2O is the molar amount of La elements, and the molar amount of thiourea is the molar amount of S elements, and the ratio of the molar amount of Cd (NO3) 2.4H 2O to the molar amount of La (NO3) 3.6H 2O to the molar amount of thiourea is Cd (NO3)24H2O: La (NO3) 3.6H 2O: thiourea ═ 1-2-3) (4: 8), and carrying out a constant temperature reaction at a high temperature of 100-170 ℃ to prepare a precipitate;
(1-2) separating the precipitate prepared in the step (1-1) from a reaction system, washing and drying to obtain a CdLa2S4 sample;
2. the preparation method of the composite photocatalyst SiC/CdLa2S4 comprises the following substeps:
(2-1) respectively weighing the CdLa2S4 prepared in the step (1) and SiC, mixing and grinding, and placing the ground mixed powder into a container containing a solvent;
(2-2) removing the solvent, drying, calcining at the temperature of 300-900 ℃, and cooling to obtain the composite photocatalyst SiC/CdLa2S 4.
Preferably, the method further comprises the following steps after the step (1) and before the step (2).
Pretreatment of SiC, the step comprising the substeps of:
(1) calcining SiC powder at the high temperature of 300-900 ℃, and then soaking in HF solution to prepare SiC suspension;
(2) and (2) separating the SiC suspension prepared in the step (1), and washing and drying the solid obtained by separation to prepare a SiC sample.
Preferably, in the step (1-1), the temperature is 120-165 ℃.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.
A preparation method of a composite photocatalyst SiC/CdLa2S4 for organic compound wastewater treatment comprises SiC and CdLa2S4, wherein the weight percentage of SiC is 0.1-20% based on the weight of CdLa2S4,
the method is characterized by comprising the following steps:
1. the preparation of CdLa2S4 comprises the following substeps:
(1-1) placing Cd (NO3) 2.4H 2O, La (NO3) 3.6H 2O and thiourea into water, placing Cd (NO3) 2.4H 2O into water, placing Cd (NO3) 3.6H 2O into water, placing Cd (NO3) 2.4H 2O into water, placing La (NO3) 3.6H 2O into water, placing the molar quantity of thiourea into a constant temperature reaction at a high temperature of 100-170 ℃, wherein the molar quantity of Cd (NO3) 2.4H 2 is larger than the molar quantity of Cd, the molar quantity of La (NO3) 3.6H 2O is larger than the molar quantity of La (NO3) 3.6H 2O, and the molar quantity of thiourea is larger than the molar quantity of S, and placing the constant temperature reaction is carried out at a constant temperature of 100-170 ℃;
(1-2) separating the precipitate prepared in the step (1-1) from a reaction system, washing and drying to obtain a CdLa2S4 sample;
2. the preparation method of the composite photocatalyst SiC/CdLa2S4 comprises the following substeps:
(2-1) respectively weighing the CdLa2S4 prepared in the step (1) and SiC, mixing and grinding, and placing the ground mixed powder into a container containing a solvent;
(2-2) removing the solvent, drying, calcining at the temperature of 300-900 ℃, and cooling to obtain the composite photocatalyst SiC/CdLa2S 4.
After the step (1) and before the step (2), the method further comprises the following steps:
pretreatment of SiC, the step comprising the substeps of:
(1) calcining SiC powder at the high temperature of 300-900 ℃, and then soaking in HF solution to prepare SiC suspension;
(2) and (2) separating the SiC suspension prepared in the step (1), and washing and drying the solid obtained by separation to prepare a SiC sample.
In the step (1-1), the temperature is 120-165 ℃.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, the techniques of the art
Additional embodiments of the invention will occur to those skilled in the art without the need for inventive faculty, and such embodiments will fall within the scope of the invention.
Claims (2)
1. Calcining SiC powder at the high temperature of 300-900 ℃, and then soaking in HF solution to prepare SiC suspension;
and (2) separating the SiC suspension prepared in the step (1), and washing and drying the solid obtained by separation to prepare a SiC sample.
2. The method according to claim 1, wherein the temperature in step (1-1) is 120 to 165 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647645.XA CN111659433A (en) | 2020-07-07 | 2020-07-07 | Composite photocatalysis for organic compound wastewater treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647645.XA CN111659433A (en) | 2020-07-07 | 2020-07-07 | Composite photocatalysis for organic compound wastewater treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111659433A true CN111659433A (en) | 2020-09-15 |
Family
ID=72391716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010647645.XA Withdrawn CN111659433A (en) | 2020-07-07 | 2020-07-07 | Composite photocatalysis for organic compound wastewater treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111659433A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289036A (en) * | 2022-01-14 | 2022-04-08 | 福州大学 | Sulfide photocatalyst containing rare earth elements and preparation method and application thereof |
-
2020
- 2020-07-07 CN CN202010647645.XA patent/CN111659433A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289036A (en) * | 2022-01-14 | 2022-04-08 | 福州大学 | Sulfide photocatalyst containing rare earth elements and preparation method and application thereof |
| CN114289036B (en) * | 2022-01-14 | 2023-05-16 | 福州大学 | Sulfide photocatalyst containing rare earth elements and preparation method and application thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200915 |