CN110713237A - Preparation method of nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater - Google Patents
Preparation method of nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater Download PDFInfo
- Publication number
- CN110713237A CN110713237A CN201911066125.3A CN201911066125A CN110713237A CN 110713237 A CN110713237 A CN 110713237A CN 201911066125 A CN201911066125 A CN 201911066125A CN 110713237 A CN110713237 A CN 110713237A
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- doped carbon
- carbon material
- heating
- fluorine double
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
-
- 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
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
The invention discloses a preparation method of a nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater, which is prepared by mixing biomass, EDTA-2Na and NH4Grinding the F in a glass mortar for 10-15min to obtain a material A; transferring Material A to a porcelain boat and placing in a tube furnace under inert N2Under the protection of gas, firstly heating from room temperature to 300 ℃ for 120min after 60min, then heating to 800 ℃ at the heating rate of 5 ℃/min for 120min, and naturally cooling to room temperature to obtain a material B; then soaking and pickling for 12 hours by using 2mol/L hydrochloric acid solution; and (3) carrying out suction filtration and washing on the material B subjected to acid washing by using high-purity water for 2-3 times, and drying in an oven at 105 ℃ for 12 hours to obtain the nitrogen-fluorine double-doped carbon material. The nitrogen-fluorine double-doped carbon material prepared by the invention contains a large amount of micropores and mesopores, can be used as a cathode material to be applied to an electro-Fenton system, can efficiently degrade organic pollutants, does not cause secondary pollution in the using process, and can not cause secondary pollution to ringsIs environment-friendly, thereby achieving the purpose of treating pollution by waste.
Description
Technical Field
The invention belongs to the technical field of synthesis of heteroatom doped porous carbon materials, and particularly relates to a preparation method of a nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater.
Background
The wastewater generated in the industrial production process (such as printing and dyeing) contains a large amount of organic pollutants with high toxicity, high concentration and difficult degradation, and the traditional water pollution treatment method is difficult to realize the high-efficiency degradation of the organic pollutants. Thus, advanced oxidation techniques (AOPs) have emerged. As one of advanced oxidation technologies, the electro-fenton method has received increasing attention from researchers due to its advantages of simple reaction apparatus, low energy consumption, low cost, no pollution, and easy control. The optimization, screening and the cathode catalytic material with high degradation efficiency become the key for the popularization and the application of the method.
At present, the existing cathode materials such as activated carbon, graphene, carbon sponge, graphite felt, reticular vitreous carbon and the like have low catalytic efficiency and H2O2The generation rate is slow, and the complete degradation of organic pollutants cannot be realized. Therefore, the research on carbon-based catalytic materials which are cheap, easy to obtain and efficient becomes a research hotspot in the field. Usually, we use activators (KOH, NaOH, H)3PO4、MgCl2Or ZnCl2Etc.) increase the specific surface area of the carbon material to improve the degradation performance of the carbon-based catalyst. However, effective improvement of the cathode reaction rate is difficult to achieve by singly regulating the specific surface area, so that a method of introducing nitrogen and fluorine heteroatoms for double doping is tried, new defect sites are introduced on the surface of a carbon material through interatomic bonds, and then the reaction of oxygen on the surface of a catalyst is promoted through the synergistic effect of the nitrogen and fluorine heteroatoms, so that H is generated in situ in the reaction process2O2And the generation of OH is guaranteed, so that the aim of efficiently degrading the simulated printing and dyeing wastewater is fulfilled. According to the invention, waste biomass is used as a carbon precursor, EDTA-2Na is used for modifying the carbon material, and heteroatom F is introduced to further regulate and control the surface composition of the synthesized material, so that more electrochemical reaction sites are exposed, the oxygen reduction reaction is promoted, and the generation of H in the electrochemical process of the catalyst is further improved2O2The performance of the catalyst can effectively improve the degradation capability of the catalyst to organic pollutants in an electro-Fenton system, and the work of degrading the organic pollutants by an electro-Fenton method is realizedThe method is applied in industrialization, thereby achieving the purpose of 'treating pollution by waste'.
Disclosure of Invention
The invention solves the technical problem of providing the preparation method of the nitrogen-fluorine double-doped carbon material for efficiently degrading the simulated printing and dyeing wastewater, which has the advantages of simple process, low cost and environmental friendliness.
The invention adopts the following technical scheme for solving the technical problems, and the preparation method of the nitrogen-fluorine double-doped carbon material for efficiently degrading the simulated printing and dyeing wastewater is characterized by comprising the following specific steps:
(1) placing biomass, EDTA-2Na (M) and NH in a glass mortar4Grinding for 10-15min to uniformly mix the materials to obtain a material A, wherein the biomass is eleusine indica (N);
(2) placing the material A in a porcelain boat under inert gas N2Placing the mixture in a tube furnace for calcination under protection, wherein the temperature rise program is as follows: heating from room temperature to 300 ℃ for 120min after 60min, heating to 800 ℃ at the heating rate of 5 ℃/min for 120min, and naturally cooling to room temperature to obtain a material B;
(3) soaking the material B in 2mol/L hydrochloric acid solution for acid washing for 12h to remove metal atoms in the material B;
(4) and (3) carrying out suction filtration washing on the material B subjected to acid washing by using high-purity water, washing for 2-3 times, then putting the material B into a beaker, and placing the beaker into a 105 ℃ drying oven for drying for 12 hours to obtain the nitrogen-fluorine double-doped carbon material, wherein the nitrogen-fluorine double-doped carbon material contains a large number of micropores and mesopores.
Further preferably, the biomass, EDTA-2Na and NH4The feeding mass ratio of F is 1:2: 0.5-3.
Further preferably, the biomass, EDTA-2Na and NH4The feeding mass ratio of F is 1:2: 2.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention uses EDTA-2Na (M) as a pore-forming agent, because the EDTA-2Na (M) is decomposed at high temperature to release a large amount of small molecular gas, a carbon material can generate a large amount of mesopores, and NH is used4F introduces hetero atoms, fluorine atom electronegativity is larger, and influence is causedThe electronic rearrangement of nearby carbon atoms for making defects can increase the specific surface area and pore volume of carbon material and obtain more electrochemical reaction sites, so increasing the working efficiency of cathode and accelerating H2O2The rate of generation of.
2. According to the invention, the eleusine indica is used as a biomass, and on the basis of a carbon precursor, hetero atoms are introduced through a single pore-forming agent activation mechanism, so that the hydrophilicity and the conductivity of the carbon material are improved, more active sites are exposed, and the electrochemical performance of the prepared carbon material is further enhanced.
3. The nitrogen-fluorine double-doped carbon material prepared by the invention contains a large amount of micropores and mesopores, can be used as a cathode material to be applied to an electro-Fenton system, can efficiently degrade organic pollutants, does not cause secondary pollution in the using process, and is environment-friendly.
Drawings
FIG. 1 is a scanning electron microscope image of the nitrogen-fluorine double doped material prepared in example 4 by field emission;
FIG. 2 is an X-ray diffraction pattern of a N-F double-doped carbon material prepared in example 4;
FIG. 3 is an infrared spectrum of a N-F double-doped carbon material prepared in example 4;
FIG. 4 is a Raman spectrum of the nitrogen-fluorine double-doped carbon material prepared in example 4;
FIG. 5 is a graph showing the degradation time of basic orange 2 solution by the N-F double doped carbon material prepared in examples 1-6.
Detailed Description
The present invention is described in further detail below with reference to examples, but it should not be construed that the scope of the above subject matter of the present invention is limited to the following examples, and that all the technologies realized based on the above subject matter of the present invention belong to the scope of the present invention.
Example 1
(1) Putting 1g of goosegrass herb powder into a glass mortar for grinding for 10min to fully and uniformly mix the powder to obtain a material A1;
(2) transferring the material A1 to a porcelain boat, placing the porcelain boat in a tube furnace, under the protection of nitrogen gas with the flow rate of 100mL/min, firstly heating the porcelain boat from room temperature for 60min to 300 ℃ for 120min, then heating the porcelain boat to 800 ℃ at the heating rate of 5 ℃/min for 120min, and then naturally cooling the porcelain boat to room temperature to obtain a material B1;
(3) transferring the material B1 to a 100mL beaker, adding 60-80mL of 2mol/L hydrochloric acid solution, and soaking and pickling for 12 h;
(4) filtering and washing the mixture for 2 to 3 times by using high-purity water, and then drying the mixture for 12 hours in a 105 ℃ forced air drying oven to obtain a catalyst C1;
(5) the prepared catalyst C1 was used as a cathode catalyst of an electro-Fenton system to degrade 50mL of a 10mg/L basic orange 2 solution, and the time taken for complete degradation was 200 min.
Example 2
(1) Putting 1g of goosegrass herb powder and 2g of EDTA-2Na in a glass mortar for grinding for 10min, and fully and uniformly mixing to obtain a material A2;
(2) transferring the material A2 to a porcelain boat, placing the porcelain boat in a tube furnace, under the protection of nitrogen gas with the flow rate of 100mL/min, firstly heating the porcelain boat from room temperature for 60min to 300 ℃ for 120min, then heating the porcelain boat to 800 ℃ at the heating rate of 5 ℃/min for 120min, and then naturally cooling the porcelain boat to room temperature to obtain a material B2;
(3) transferring the material B2 to a 100mL beaker, adding 60-80mL of 2mol/L hydrochloric acid solution, and soaking and pickling for 12 h;
(4) filtering and washing the mixture for 2 to 3 times by using high-purity water, and then drying the mixture for 12 hours in a 105 ℃ forced air drying oven to obtain a catalyst C2;
(5) the prepared catalyst C2 was used as a cathode catalyst of an electro-Fenton system to degrade 50mL of a 10mg/L basic orange 2 solution, and the time taken for complete degradation was 180 min.
Example 3
(1) Mixing 1g herba Eleusines Indicae powder, 2g EDTA-2Na and 0.5g NH4Grinding the powder F in a glass mortar for 10min to obtain a material A3;
(2) transferring the material A3 to a porcelain boat, placing the porcelain boat in a tube furnace, under the protection of nitrogen gas with the flow rate of 100mL/min, firstly heating the porcelain boat from room temperature for 60min to 300 ℃ for 120min, then heating the porcelain boat to 800 ℃ at the heating rate of 5 ℃/min for 120min, and then naturally cooling the porcelain boat to room temperature to obtain a material B3;
(3) transferring the material B3 to a 100mL beaker, adding 60-80mL of 2mol/L hydrochloric acid solution, and soaking and pickling for 12 h;
(4) filtering and washing the mixture for 2 to 3 times by using high-purity water, and then drying the mixture for 12 hours in a 105 ℃ forced air drying oven to obtain a catalyst C3;
(5) the prepared catalyst C3 was used as a cathode catalyst of an electro-Fenton system to degrade 50mL of a 10mg/L basic orange 2 solution, and the time taken for complete degradation was 150 min.
Example 4
(1) Mixing 1g herba Eleusines Indicae powder, 2g EDTA-2Na and 1g NH4Grinding the powder F in a glass mortar for 10min to obtain a material A4;
(2) transferring the material A4 to a porcelain boat, placing the porcelain boat in a tube furnace, under the protection of nitrogen gas with the flow rate of 100mL/min, firstly heating the porcelain boat from room temperature for 60min to 300 ℃ for 120min, then heating the porcelain boat to 800 ℃ at the heating rate of 5 ℃/min for 120min, and then naturally cooling the porcelain boat to room temperature to obtain a material B4;
(3) transferring the material B4 to a 100mL beaker, adding 60-80mL of 2mol/L hydrochloric acid solution, and soaking and pickling for 12 h;
(4) filtering and washing the mixture for 2 to 3 times by using high-purity water, and then drying the mixture for 12 hours in a 105 ℃ forced air drying oven to obtain a catalyst C4;
(5) the prepared catalyst C4 was used as a cathode catalyst of an electro-Fenton system to degrade 50mL of a 10mg/L basic orange 2 solution, and the time taken for complete degradation was 130 min.
Example 5
(1) Mixing 1g herba Eleusines Indicae powder, 2g DTA-2Na and 2g NH4Grinding the powder F in a glass mortar for 10min to obtain a material A5;
(2) transferring the material A5 to a porcelain boat, placing the porcelain boat in a tube furnace, under the protection of nitrogen gas with the flow rate of 100mL/min, firstly heating the porcelain boat from room temperature for 60min to 300 ℃ for 120min, then heating the porcelain boat to 800 ℃ at the heating rate of 5 ℃/min for 120min, and then naturally cooling the porcelain boat to room temperature to obtain a material B5;
(3) transferring the material B5 to a 100mL beaker, adding 60-80mL of 2mol/L hydrochloric acid solution, and soaking and pickling for 12 h;
(4) filtering and washing the mixture for 2 to 3 times by using high-purity water, and then drying the mixture for 12 hours in a 105 ℃ forced air drying oven to obtain a catalyst C5;
(5) the prepared catalyst C5 was used as a cathode catalyst of an electro-Fenton system to degrade 50mL of a 10mg/L basic orange 2 solution, and the time taken for complete degradation was 100 min.
Example 6
(1) Mixing 1g of goosegrass herb, 2g of EDTA-2Na and 3g of NH4Grinding the powder F in a glass mortar for 10min to obtain a material A6;
(2) transferring the material A6 to a porcelain boat, placing the porcelain boat in a tube furnace, under the protection of nitrogen gas with the flow rate of 100mL/min, firstly heating the porcelain boat from room temperature for 60min to 300 ℃ for 120min, then heating the porcelain boat to 800 ℃ at the heating rate of 5 ℃/min for 120min, and then naturally cooling the porcelain boat to room temperature to obtain a material B6;
(3) transferring the material B6 to a 100mL beaker, adding 60-80mL of 2mol/L hydrochloric acid solution, and soaking and pickling for 12 h;
(4) filtering and washing the mixture for 2 to 3 times by using high-purity water, and then drying the mixture for 12 hours in a 105 ℃ forced air drying oven to obtain a catalyst C6;
(5) the prepared catalyst C6 was used as a cathode catalyst of an electro-Fenton system to degrade 50mL of a 10mg/L basic orange 2 solution, and the time taken for complete degradation was 120 min.
The foregoing embodiments illustrate the principles, principal features and advantages of the invention, and it will be understood by those skilled in the art that the invention is not limited to the foregoing embodiments, which are merely illustrative of the principles of the invention, and that various changes and modifications may be made therein without departing from the scope of the principles of the invention.
Claims (4)
1. A preparation method for efficiently degrading a nitrogen-fluorine double-doped carbon material simulating printing and dyeing wastewater is characterized by comprising the following specific steps:
(1) putting biomass, EDTA-2Na and NH into a glass mortar4Grinding for 10-15min to uniformly mix the materials to obtain a material A, wherein the biomass is eleusine indica;
(2) placing the material A in a porcelain boat under inert gas N2And placing the mixture into a tubular furnace for calcination under protection.
2. The temperature-raising program is as follows: heating from room temperature to 300 ℃ for 120min after 60min, heating to 800 ℃ at the heating rate of 5 ℃/min for 120min, and naturally cooling to room temperature to obtain a material B;
(3) soaking the material B in 2mol/L hydrochloric acid solution for 12 hours to remove metal atoms in the material B;
(4) and (3) carrying out suction filtration washing on the material B by using high-purity water, washing for 2-3 times, then putting the material B into a beaker, and drying the material in a drying oven at 105 ℃ for 12 hours to obtain the nitrogen-fluorine double-doped carbon material, wherein the nitrogen-fluorine double-doped carbon material contains a large number of micropores and mesopores.
3. The preparation method of the nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater according to claim 1, characterized by comprising the following steps of: the biomass, EDTA-2Na and NH4The feeding mass ratio of F is 1:2: 0.5-3.
4. The preparation method of the nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater according to claim 1, characterized by comprising the following steps of: the biomass, EDTA-2Na and NH4The feeding mass ratio of F is 1:2: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911066125.3A CN110713237A (en) | 2019-11-04 | 2019-11-04 | Preparation method of nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911066125.3A CN110713237A (en) | 2019-11-04 | 2019-11-04 | Preparation method of nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110713237A true CN110713237A (en) | 2020-01-21 |
Family
ID=69214657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911066125.3A Pending CN110713237A (en) | 2019-11-04 | 2019-11-04 | Preparation method of nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110713237A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170203284A1 (en) * | 2008-06-18 | 2017-07-20 | Board Of Trustees Of The University Of Arkansas | Doped-carbon composites, synthesizing methods and applications of the same |
| KR101932428B1 (en) * | 2017-10-16 | 2018-12-26 | 한국과학기술연구원 | Material for reduction electrode and Method for fabricating the same and Electro-Fenton system using the same |
| CN109731603A (en) * | 2019-01-23 | 2019-05-10 | 河南师范大学 | A kind of universality method and its application of the nitrogen-doped carbon catalyst controllable with single pore-foaming agent preparation pore size |
| CN110048134A (en) * | 2019-05-27 | 2019-07-23 | 河南师范大学 | A kind of universality method preparing porous nitrogen fluorine codope carbon oxygen reduction catalyst |
-
2019
- 2019-11-04 CN CN201911066125.3A patent/CN110713237A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170203284A1 (en) * | 2008-06-18 | 2017-07-20 | Board Of Trustees Of The University Of Arkansas | Doped-carbon composites, synthesizing methods and applications of the same |
| KR101932428B1 (en) * | 2017-10-16 | 2018-12-26 | 한국과학기술연구원 | Material for reduction electrode and Method for fabricating the same and Electro-Fenton system using the same |
| CN109731603A (en) * | 2019-01-23 | 2019-05-10 | 河南师范大学 | A kind of universality method and its application of the nitrogen-doped carbon catalyst controllable with single pore-foaming agent preparation pore size |
| CN110048134A (en) * | 2019-05-27 | 2019-07-23 | 河南师范大学 | A kind of universality method preparing porous nitrogen fluorine codope carbon oxygen reduction catalyst |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109647474B (en) | Nitrogen-doped carbon material, preparation and application thereof | |
| CN108325555B (en) | Nitrogen self-doped graphitized carbon nitride nanosheet photocatalyst and preparation method and application thereof | |
| CN111659434B (en) | CuO nanosheet/g-C 3 N 4 Preparation method and application of nanosheet heterojunction composite material | |
| CN110743527A (en) | Preparation method of mesoporous ozone catalyst | |
| CN105618098A (en) | Platinum supported nitrogen-doped molybdenum disulfide photocatalyst and preparation method thereof | |
| CN105289498A (en) | Preparation method of composite of biochar-carbon nano-material | |
| CN110876953A (en) | P and S co-doped carbon nitride homotype heterojunction composite photocatalyst | |
| Liu et al. | MOF-derived B, N co-doped porous carbons as metal-free catalysts for highly efficient nitro aromatics reduction | |
| CN109731603A (en) | A kind of universality method and its application of the nitrogen-doped carbon catalyst controllable with single pore-foaming agent preparation pore size | |
| CN106064962A (en) | Utilize mud and coal ash for manufacturing for the method for catalyst particle electrode and application | |
| CN101234332A (en) | Method for using sewage sludge and waste graphite to prepare activated adsorption material | |
| CN111250092B (en) | Preparation method and application of biomass honeycomb-shaped semicoke-loaded nickel-iron nanoparticle catalyst | |
| CN112938969A (en) | Method for preparing nitrogen-sulfur co-doped activated carbon by pore-forming/doping integrated activating agent and application of method | |
| CN110980917A (en) | Method for degrading printing and dyeing wastewater by using graphite-phase carbon nitride activated persulfate under dark reaction condition | |
| CN110694606B (en) | Universal method for preparing multi-level pore coexisting heteroatom-doped carbon catalyst by using soft template agent and application thereof | |
| CN112591742B (en) | Nitrogen-sulfur co-doped porous graphitized carbon nano material and preparation method thereof | |
| CN116174009B (en) | Nitrogen-sulfur doped porous carbon catalyst and application thereof | |
| CN113089015A (en) | Nitrogen-doped carbon quantum dot and preparation method thereof, reduced graphene oxide and preparation method and application thereof | |
| CN110713237A (en) | Preparation method of nitrogen-fluorine double-doped carbon material for efficiently degrading simulated printing and dyeing wastewater | |
| CN109851002A (en) | A kind of micro-electrolysis stuffing and its preparation method and application for realizing iron cement recycling | |
| CN113522338B (en) | Application of boron-oxygen co-doped carbon nitride non-metallic ozone catalyst | |
| CN107758655A (en) | A kind of porous graphite and preparation method and application | |
| Peng et al. | Assessing the potential of biochar derived from sewage sludge for photoelectrode fabrication: methods, mechanisms, and conclusions | |
| CN112138643A (en) | Novel method for resource utilization of biomass pyrolysis tar | |
| CN111204734A (en) | Flaky biomass carbon material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200121 |
|
| WD01 | Invention patent application deemed withdrawn after publication |