CN108069414A - A kind of method for preparing carbon nanomaterial using discarded pine tree tower - Google Patents
A kind of method for preparing carbon nanomaterial using discarded pine tree tower Download PDFInfo
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Abstract
A kind of method for preparing carbon material using discarded pine tree tower, it is that pine tree tower is added to hydrothermal reaction kettle to carry out hydro-thermal reaction together with ammonium hydroxide, ultra-pure water, after hydro-thermal reaction, pour out the reaction solution in hydrothermal reaction kettle, using centrifugation, filtering, freeze-drying and etc. up to carbon quantum dot material；Remaining deposit in water heating kettle is collected simultaneously, Nano carbon balls material is obtained by being dried in vacuo and grinding.A kind of method for preparing carbon material using discarded pine tree tower of the present invention can realize the efficient utilization of waste biomass resource, and raw material are cheap and easy to get, obtained carbon quantum dot material good dispersion, soilless sticking phenomenon occurs, product purity is high, do not find that impurity exists, product size is homogeneous, and also have preferable water-soluble, it in water being capable of stable dispersion, long-term place still is never degenerated, and preparation method of the present invention has many advantages, such as green, easy, quick, efficient, is convenient for large-scale preparation and industrialized production.
Description
Technical field
The invention belongs to field of material synthesis technology, and in particular to a kind of side that carbon material is prepared using discarded pine tree tower
Method.
Background technology
Quantum dot is a kind of nano material of quasi-zero dimension, refers to that radius is less than the semiconductor nano of Exciton Bohr Radius
Body has significant quantum confined effect.Common quantum dot refers to traditional semiconductor-quantum-point, by rare earth element II-VI
It is formed with III-group Ⅴ element, such as CdS, CdSe, CdTe, ZnSe, ZnS.The toxicity of semiconductor-quantum-point is big, manufacturing cost is high,
Environmental pollution is serious, limits its practical application in various fields.
Carbon quantum dot（Carbon quantum dots, CQDs）It is the scientist by U.S.'s Clemson University in 2004
A kind of novel fluorescence carbon nanomaterial manufactured for the first time is usually the carbon nanometer micro ball that size is less than 10 nm.It is partly led with traditional
Body quantum dot is compared, and carbon quantum dot does not contain heavy metal element, has low-down bio-toxicity.In addition, carbon quantum dot also has
There is the advantages that prominent fluorescence property, good optical stability, it is considered to be the potential material of alternative semiconductors fluorescent material.
The preparation method of carbon quantum dot can be mainly divided into two major classes at present：From top to bottom and bottom-to-top method.Before
Person be by large-sized carbon structure such as graphene, carbon nanotubes, carbon fiber, carbon black etc. using electric arc electric discharge, laser ablation, with
And the methods of electrochemical oxidation, carries out broken cutting, forms the carbon quantum dot of small size.The latter be then by using citrate,
Carbohydrate equimolecular is as presoma, by synthesizing carbon quantum dot the methods of chemical oxidation and heat treatment.However, mesh
The preceding above method there is the raw material used and experiment equipment costliness, preparation flow take, operating process is complicated or product yield is low
The defects of so that the manufacturing cost of carbon quantum dot remains high and is difficult to that a large amount of samples are made, and limits the big rule of carbon quantum dot
Mould produces and application.Therefore, cheap and easy to get, environment friendly material is found, utilizes the method rapid batch being simple and efficient
Preparing carbon quantum dot has highly important theory significance and actual application value.
Using biomass resource as raw material, energy conservation and environmental protection, and do not contain the toxic components such as heavy metal ion, be more advantageous to its
The application of carbon material preparation field.Biomass resource is widespread in nature, is cheap and easy to get, is inexhaustible, is nexhaustible,
Biomass resource for the green of carbon nanomaterial is prepared, that is, has expanded the application field of biomass resource, and has protected ring
Border, therefore have broad application prospects.At present, some on biomass resource prepare carbon quantum dot reports, such as
Materials Letters, 2012, 66: 222-224; Catalysis Science and Technology, 2013,
3: 1027-1035; Analytical Methods, 2013, 5: 3023+-3027; Environmental Science
and Technology Letters, 2014, 1: 87-91; Chemical Communications, 2015, 51:
16625-16628; Journal of Materials Science, 2016, 51:8108-8115 etc..
Shape of the pine tree tower to be born after pine tree maturation on branch has pinaster seed like the fruit of turriform in pine tree tower.
Pinaster seed is a kind of edible pollution-free food, rich containing unrighted acid, vitamin, fat oil, calcium, iron, phosphorus, potassium etc.
Rich minerals.However, people usually discard pine tree tower after winning pine tree tower and obtaining pinaster seed, not only cause tight
The wasting of resources of weight, and bring inevitable environmental pollution.
The content of the invention
It is an object of the invention to provide a kind of methods for preparing carbon material using discarded pine tree tower.
The purpose of the present invention is what is realized by following technical measures：
A kind of method for preparing carbon quantum dot using discarded pine tree tower, which is characterized in that first by discarded pine tree tower and ammonium hydroxide, surpass
Pure water is added in hydrothermal reaction kettle and seals together, is then placed in baking oven or Muffle furnace, and set temperature is 180 ~ 250 DEG C,
When hydro-thermal reaction 5 ~ 30 is small, after hydro-thermal reaction, water heating kettle is taken out, naturally cools to 20 ~ 25 DEG C, it is anti-then to pour out hydro-thermal
Answer the reaction solution in kettle, using centrifugation, filtering, freeze-drying and etc. up to carbon quantum dot material.
Further, above-mentioned pine tree tower, ammonium hydroxide, ultra-pure water need to meet quality：Volume：Volume（g/ml）=1:3~10:7 ~ 20,
The ammonium hydroxide volumetric concentration is 25% ~ 28%, and the centrifugation step is placed reaction liquid into centrifuge, and setting centrifugal rotational speed is
8000 ~ 12000r/min, centrifugation time for 5 ~ 30 minutes to get.
Preferably, above-mentioned filtering is by the supernatant after centrifugation, is first filtered with 0.45 μm of cellulose mixture fat water system micropore
Membrane filtration is collected filtrate, then is filtered with 0.22 μm of cellulose mixture fat water system miillpore filter, collect filtrate to get.
Further, above-mentioned freeze-drying is that precooling 8-18 is small in freezer compartment of refrigerator by the aqueous solution of carbon quantum dot
When, the freezing liquid for the carbon quantum dot freezed；Freeze drier is opened, when -60 DEG C of precooling 1-4 are small, then add in and waits to do
Dry carbon quantum dot freezing liquid starts to vacuumize freeze-drying, and vacuum degree is below 20Pa, and freeze-drying temperature is -55 to -60
Between DEG C, when sublimation drying is 48-63 small.By the product after vacuum freeze drying further in vacuum drying oven
When 60-70 DEG C of drying 52-68 is small, carbon quantum dot material is obtained.
A kind of method for preparing Nano carbon balls using discarded pine tree tower, which is characterized in that it is in above-mentioned hydro-thermal reaction knot
Shu Hou collects the sediment in hydrothermal reaction kettle, and Nano carbon balls material can be obtained by vacuum drying, grinding steps；It is described
Vacuum drying vacuum degree is -0.1 below MPa, and drying temperature is 40 ~ 100 DEG C, when drying time 10 ~ 72 is small.
The beneficial effects of the present invention are：
The present invention can realize waste utilization using the method that discarded pine tree tower prepares carbon material, and raw material are cheap and easy to get, institute
Intermediate products carbon quantum dot good water solubility is obtained, good dispersion is placed 1 year or more and undergone no deterioration, and finished product carbon quantum dot material is disperseed
Property it is good, soilless sticking phenomenon occurs, and product purity is high, does not find that impurity exists, and product size is homogeneous, and also has preferable water
Dissolubility, in water can stable dispersion, long-term place still never degenerate, and prepared carbon quantum dot material is in biomarker, biology
Imaging, medical diagnosis, medicine/gene transmission, sensor, photoelectronic device, photocatalysis etc. have huge application potential；
Prepared Nano carbon balls material has a wide range of applications promotional value in fields such as absorption, catalysis, separation, the energy.The present invention
Preparation method have many advantages, such as it is green, easy, quick, efficient, be convenient on a large scale prepare and industrialized production.
Description of the drawings
Fig. 1 is the transmission electron microscope picture of 1 gained carbon quantum dot of embodiment.
Fig. 2 is the scanning electron microscopic picture of 1 gained Nano carbon balls of embodiment.
Fig. 3 is the transmission electron microscope picture of 2 gained carbon quantum dot of embodiment.
Fig. 4 is the scanning electron microscopic picture of 2 gained Nano carbon balls of embodiment.
Fig. 5 is the transmission electron microscope picture of 3 gained carbon quantum dot of embodiment.
Fig. 6 is the scanning electron microscopic picture of 3 gained Nano carbon balls of embodiment.
Fig. 7 is the transmission electron microscope picture of 4 gained carbon quantum dot of embodiment.
Fig. 8 is the scanning electron microscopic picture of 4 gained Nano carbon balls of embodiment.
Fig. 9 is the flow diagram that pine tree tower hydro-thermal method prepares carbon quantum dot and Nano carbon balls.
Specific embodiment
The present invention is specifically described below by embodiment, it is necessary to which indicated herein is that following embodiment is only used
It is further described in the present invention, it is impossible to limiting the scope of the invention is interpreted as, without departing substantially from spirit of the invention
In the case of essence, to the modifications or substitutions that the method for the present invention, step or condition are made, all belong to the scope of the present invention.
Embodiment 1
A kind of method for preparing carbon nanomaterial using discarded pine tree tower, using omnipotent after the pine tree tower discarded is cleaned, dried
Pulverizer crushes, grinding obtains pine tree tower powdered rubber, weighs 2.5 grams of pine tree tower powder, the concentrated ammonia liquor that 15 milliliters of concentration are 25%
It with 50 milliliters of ultra-pure waters, is added in water heating kettle, when 220 DEG C of hydro-thermals 12 are small in an oven, after hydro-thermal reaction, by water heating kettle
It takes out, then cooled to room temperature pours out the reaction solution in hydrothermal reaction kettle；By 10000 revs/min of rotating speed high speed centrifugation
15 minutes, successively using 0.45 micron, 0.22 micron of cellulose mixture fat（Water system）Miillpore filter is filtered purifying, obtains carbon
Quantum dot solution.Carbon quantum dot solution is sampled and is positioned over Cord blood in 4 DEG C of refrigerators, setting-out is observed for 1 year, finds carbon
Quantum dot solution still never degenerates, and illustrates that gained carbon quantum dot has excellent water solubility, is capable of the scattered of stable and uniform in water.
Then when by carbon quantum dot solution, precooling 8 is small in freezer compartment of refrigerator, the freezing for the carbon quantum dot freezed
Liquid；Freeze drier is opened, when -60 DEG C of precoolings 1 are small, carbon quantum dot freezing liquid to be dried then added in, starts to vacuumize
Freeze-drying, vacuum degree are below 20Pa, and freeze-drying temperature is -58 DEG C, when sublimation drying is 48 small.Vacuum will be passed through
Product after freeze-drying obtains carbon quantum dot material when further 60 DEG C of drying 52 are small in vacuum drying oven.
The transmission electron microscope picture of products obtained therefrom is as shown in Figure 1.As can be seen that substantial amounts of carbon quantum dot material is with very good
Dispersiveness, there is no agglomeration；It is non-also to illustrate that gained carbon quantum dot has without the presence of discovery impurity in the product
Often high purity；The size of gained carbon quantum dot is also very homogeneous, and average grain diameter is 2.0 nanometers.It can be seen that present invention gained carbon
Quantum dot has the series of advantages such as preferable water solubility, high-purity, dispersiveness, size uniformity, high stability.
The present invention also has collected remaining deposit in hydrothermal reaction kettle simultaneously, is placed in vacuum drying chamber, vacuum
Below degree -0.1MPa when 40 DEG C of vacuum drying 72 are small, then take out and grinds up to Nano carbon balls material, gained Nano carbon balls material
The scanning electron microscopic picture of material is as shown in Figure 2.
Embodiment 2
A kind of method for preparing carbon nanomaterial using discarded pine tree tower, using omnipotent after the pine tree tower discarded is cleaned, dried
Pulverizer crushes, grinding obtains pine tree tower powdered rubber, weighs 3.5 grams of pine tree tower powder, the concentrated ammonia liquor that 18 milliliters of concentration are 28%
It with 45 milliliters of ultra-pure waters, is added in water heating kettle, when 180 DEG C of hydro-thermals 30 are small in an oven, after hydro-thermal reaction, by water heating kettle
It takes out, then cooled to room temperature pours out the reaction solution in hydrothermal reaction kettle；By 8000 revs/min of rotating speed high speed centrifugation
30 minutes, successively using 0.45 micron, 0.22 micron of cellulose mixture fat（Water system）Miillpore filter is filtered purifying, obtains carbon
Quantum dot solution.Carbon quantum dot solution is sampled and is positioned over Cord blood in 4 DEG C of refrigerators, setting-out is observed for 1 year, finds carbon
Quantum dot solution still never degenerates, and illustrates that gained carbon quantum dot has excellent water solubility, is capable of the scattered of stable and uniform in water.
Then when by carbon quantum dot solution, precooling 18 is small in freezer compartment of refrigerator, the freezing for the carbon quantum dot freezed
Liquid；Freeze drier is opened, when -60 DEG C of precoolings 4 are small, carbon quantum dot freezing liquid to be dried then added in, starts to vacuumize
Freeze-drying, vacuum degree are below 20Pa, and freeze-drying temperature is -55 DEG C, when sublimation drying is 63 small.Vacuum will be passed through
Product after freeze-drying obtains carbon quantum dot material when further 70 DEG C of drying 68 are small in vacuum drying oven.
The transmission electron microscope picture of products obtained therefrom is as shown in Figure 3.As can be seen that substantial amounts of carbon quantum dot material is with very good
Dispersiveness, there is no agglomeration；It is non-also to illustrate that gained carbon quantum dot has without the presence of discovery impurity in the product
Often high purity；The size of gained carbon quantum dot is also very homogeneous, and average grain diameter is 2.0 nanometers.It can be seen that present invention gained carbon
Quantum dot has the series of advantages such as preferable water solubility, high-purity, dispersiveness, size uniformity, high stability.
The present invention also has collected remaining deposit in hydrothermal reaction kettle simultaneously, is placed in vacuum drying chamber, and vacuum degree-
Below 0.1MPa when 60 DEG C of vacuum drying 50 are small, then take out and grinds up to Nano carbon balls material, gained Nano carbon balls material
Scanning electron microscopic picture is as shown in Figure 4.
Embodiment 3
A kind of method for preparing carbon nanomaterial using discarded pine tree tower, using omnipotent after the pine tree tower discarded is cleaned, dried
Pulverizer crushes, grinding obtains pine tree tower powdered rubber, weighs 4.5 grams of pine tree tower powder, the concentrated ammonia liquor that 20 milliliters of concentration are 27%
It with 45 milliliters of ultra-pure waters, is added in water heating kettle, when 200 DEG C of hydro-thermals 15 are small in an oven, after hydro-thermal reaction, by water heating kettle
It takes out, then cooled to room temperature pours out the reaction solution in hydrothermal reaction kettle；By 12000 revs/min of rotating speed high speed centrifugation
5 minutes, successively using 0.45 micron, 0.22 micron of cellulose mixture fat（Water system）Miillpore filter filter membrane is filtered purifying,
Obtain carbon quantum dot solution.Carbon quantum dot solution is sampled and is positioned over Cord blood in 4 DEG C of refrigerators, setting-out is observed for 1 year, hair
Existing carbon quantum dot solution still never degenerates, and illustrates that gained carbon quantum dot has excellent water solubility, is capable of stable and uniform in water
It is scattered.
Then when by carbon quantum dot solution, precooling 15 is small in freezer compartment of refrigerator, the freezing for the carbon quantum dot freezed
Liquid；Freeze drier is opened, when -60 DEG C of precoolings 3 are small, carbon quantum dot freezing liquid to be dried then added in, starts to vacuumize
Freeze-drying, vacuum degree are below 20Pa, and freeze-drying temperature is -57 DEG C, when sublimation drying is 56 small.Vacuum will be passed through
Product after freeze-drying obtains carbon quantum dot material when further 50 DEG C of drying 48 are small in vacuum drying oven.
The transmission electron microscope picture of products obtained therefrom is as shown in Figure 5.As can be seen that substantial amounts of carbon quantum dot material is with very good
Dispersiveness, there is no agglomeration；It is non-also to illustrate that gained carbon quantum dot has without the presence of discovery impurity in the product
Often high purity；The size of gained carbon quantum dot is also very homogeneous, and average grain diameter is 2.1 nanometers.It can be seen that present invention gained carbon
Quantum dot has the series of advantages such as preferable water solubility, high-purity, dispersiveness, size uniformity, high stability.
The present invention also has collected remaining deposit in hydrothermal reaction kettle simultaneously, is placed in vacuum drying chamber, and vacuum degree-
Below 0.1MPa when 70 DEG C of vacuum drying 36 are small, then take out and grinds up to Nano carbon balls material, gained Nano carbon balls material
Scanning electron microscopic picture is as shown in Figure 6.
Embodiment 4
A kind of method for preparing carbon nanomaterial using discarded pine tree tower, using omnipotent after the pine tree tower discarded is cleaned, dried
Pulverizer crushes, grinding obtains pine tree tower powdered rubber, weigh 6 grams of pine tree tower powder, the concentrated ammonia liquor that 30 milliliters of concentration are 26% and
45 milliliters of ultra-pure waters, are added in water heating kettle, and when 250 DEG C of hydro-thermals 5 are small in an oven, after hydro-thermal reaction, water heating kettle is taken
Go out, cooled to room temperature, then pour out the reaction solution in hydrothermal reaction kettle；By 10000 revs/min of rotating speed high speed centrifugation 15
Minute, successively using 0.45 micron, 0.22 micron of cellulose mixture fat（Water system）Miillpore filter is filtered purifying, obtains carbon amounts
Son point solution.Carbon quantum dot solution is sampled and is positioned over Cord blood in 4 DEG C of refrigerators, setting-out is observed for 1 year, finds carbon amounts
Son point solution still never degenerates, and illustrates that gained carbon quantum dot has excellent water solubility, is capable of the scattered of stable and uniform in water.
Then when by carbon quantum dot solution, precooling 15 is small in freezer compartment of refrigerator, the freezing for the carbon quantum dot freezed
Liquid；Freeze drier is opened, when -60 DEG C of precoolings 2.5 are small, then adds in carbon quantum dot freezing liquid to be dried, starts to take out true
Vacuum freecing-dry, vacuum degree are below 20Pa, and freeze-drying temperature is -57 DEG C, when sublimation drying is 62 small.It will pass through true
Product after vacuum freecing-dry obtains carbon quantum dot material when further 68 DEG C of drying 60 are small in vacuum drying oven.
The transmission electron microscope picture of products obtained therefrom is as shown in Figure 7.As can be seen that substantial amounts of carbon quantum dot material is with very good
Dispersiveness, there is no agglomeration；It is non-also to illustrate that gained carbon quantum dot has without the presence of discovery impurity in the product
Often high purity；The size of gained carbon quantum dot is also very homogeneous, and average grain diameter is 2.0 nanometers.It can be seen that present invention gained carbon
Quantum dot has the series of advantages such as preferable water solubility, high-purity, dispersiveness, size uniformity, high stability.
The present invention also has collected remaining deposit in hydrothermal reaction kettle simultaneously, is placed in vacuum drying chamber, and vacuum degree-
Below 0.1MPa when 100 DEG C of vacuum drying 10 are small, then take out and grinds up to Nano carbon balls material, gained Nano carbon balls material
Scanning electron microscopic picture it is as shown in Figure 8.
Claims (5)
- A kind of 1. method that discarded pine tree tower is utilized to prepare carbon quantum dot, which is characterized in that pine tree tower discarded first and ammonium hydroxide surpass Pure water is added in hydrothermal reaction kettle and seals together, is then placed in baking oven or Muffle furnace, 180 ~ 250 DEG C of set temperature, water When thermal response 5 ~ 30 is small, after hydro-thermal reaction, water heating kettle is taken out, 20 ~ 25 DEG C is naturally cooled to, then pours out hydro-thermal reaction Reaction solution in kettle, using centrifugation, filtering, freeze-drying and etc. up to carbon quantum dot material.
- A kind of 2. method for preparing carbon quantum dot using discarded pine tree tower as described in claim 1, which is characterized in that the pine tree Tower, ammonium hydroxide, ultra-pure water need to meet quality：Volume：Volume=1:3~10:7 ~ 20, the ammonium hydroxide volumetric concentration is 25% ~ 28%, described Centrifugation step is placed reaction liquid into centrifuge, and setting centrifugal rotational speed is 8000 ~ 12000r/min, and centrifugation time is 5 ~ 30 points Clock to get.
- A kind of 3. method for preparing carbon quantum dot using discarded pine tree tower as described in claim 1, which is characterized in that the filtering It is by the supernatant after centrifugation, is first filtered with 0.45 μm of cellulose mixture fat water system miillpore filter, collects filtrate, then with 0.22 μm cellulose mixture fat water system miillpore filter filtering, collect filtrate to get.
- A kind of 4. method for preparing carbon quantum dot using discarded pine tree tower as described in claim 1, which is characterized in that the freezing Drying be by the aqueous solution of carbon quantum dot precooling 8-18 is small in freezer compartment of refrigerator when, the freezing for the carbon quantum dot freezed Liquid；Freeze drier is opened, when -60 DEG C of precooling 1-4 are small, then adds in carbon quantum dot freezing liquid to be dried, starts to take out true Vacuum freecing-dry, vacuum degree is below 20Pa, between freeze-drying temperature is -55 to -60 DEG C, sublimation drying 48-63 Hour, when further 60-70 DEG C of drying 52-68 is small in vacuum drying oven by the product after vacuum freeze drying, obtain carbon Quanta point material.
- A kind of 5. method for preparing Nano carbon balls using discarded pine tree tower, which is characterized in that pine tree tower discarded first and ammonium hydroxide surpass Pure water is added in hydrothermal reaction kettle and seals together, is then placed in baking oven or Muffle furnace, 180 ~ 250 DEG C of set temperature, water When thermal response 5 ~ 30 is small, after hydro-thermal reaction, water heating kettle is taken out, 20 ~ 25 DEG C is naturally cooled to, hydro-thermal reaction is collected by centrifugation Sediment in kettle can obtain Nano carbon balls material by vacuum drying, grinding steps；The vacuum drying vacuum degree For -0.1 below MPa, drying temperature is 40 ~ 100 DEG C, when drying time 10 ~ 72 is small.
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Cited By (7)
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| CN109385274A (en) * | 2018-11-13 | 2019-02-26 | 广东药科大学 | Biomass-based efficient sulphur nitrogen-doped carbon quantum dot and its preparation method and application |
| CN109437155A (en) * | 2018-12-14 | 2019-03-08 | 青岛大学 | A kind of method and products thereof of carbon quantum dot and Nano carbon balls preparation simultaneously |
| CN109593524A (en) * | 2018-12-26 | 2019-04-09 | 南京林业大学 | Use radiation loose wire preparation Water-soluble carbon quantum dot and the method and its application of fluorescent ink |
| CN109880619A (en) * | 2019-02-19 | 2019-06-14 | 天津科技大学 | A method of Fe (III) ion is detected using the biomass-based carbon quantum dot of N doping |
| CN110194953A (en) * | 2019-06-27 | 2019-09-03 | 上海大学 | Biomass-based fluorescent carbon quantum dot, preparation method and application |
| CN113371698A (en) * | 2021-07-28 | 2021-09-10 | 苏州高乔新材料科技有限公司 | Preparation method of pine sawdust modified graphene aerogel |
| CN113694887A (en) * | 2021-07-30 | 2021-11-26 | 桂林理工大学 | Method for co-producing activated carbon and carbon quantum dots by taking rice flour waste as raw material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109385274A (en) * | 2018-11-13 | 2019-02-26 | 广东药科大学 | Biomass-based efficient sulphur nitrogen-doped carbon quantum dot and its preparation method and application |
| CN109385274B (en) * | 2018-11-13 | 2021-04-06 | 广东药科大学 | Biomass-based efficient sulfur-nitrogen doped carbon quantum dot and preparation method and application thereof |
| CN109437155A (en) * | 2018-12-14 | 2019-03-08 | 青岛大学 | A kind of method and products thereof of carbon quantum dot and Nano carbon balls preparation simultaneously |
| CN109593524A (en) * | 2018-12-26 | 2019-04-09 | 南京林业大学 | Use radiation loose wire preparation Water-soluble carbon quantum dot and the method and its application of fluorescent ink |
| CN109880619A (en) * | 2019-02-19 | 2019-06-14 | 天津科技大学 | A method of Fe (III) ion is detected using the biomass-based carbon quantum dot of N doping |
| CN110194953A (en) * | 2019-06-27 | 2019-09-03 | 上海大学 | Biomass-based fluorescent carbon quantum dot, preparation method and application |
| CN113371698A (en) * | 2021-07-28 | 2021-09-10 | 苏州高乔新材料科技有限公司 | Preparation method of pine sawdust modified graphene aerogel |
| CN113694887A (en) * | 2021-07-30 | 2021-11-26 | 桂林理工大学 | Method for co-producing activated carbon and carbon quantum dots by taking rice flour waste as raw material |
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