CN109575886B - Method for preparing photo-thermal conversion material based on lotus leaves - Google Patents
Method for preparing photo-thermal conversion material based on lotus leaves Download PDFInfo
- Publication number
- CN109575886B CN109575886B CN201811579258.6A CN201811579258A CN109575886B CN 109575886 B CN109575886 B CN 109575886B CN 201811579258 A CN201811579258 A CN 201811579258A CN 109575886 B CN109575886 B CN 109575886B
- Authority
- CN
- China
- Prior art keywords
- lotus leaves
- leaves
- lotus
- sample
- temperature
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
A method for preparing a photothermal conversion material based on lotus leaves belongs to the technical field of preparation of solar photothermal conversion materials. The method comprises the following steps: 1) taking fresh lotus leaves, cleaning and airing; 2) freezing the treated lotus leaf leaves at the temperature of-18 to-24 ℃ for 12 to 24 hours to obtain a frozen sample A; 3) putting the frozen sample A into a vacuum freeze drying oven, and drying for 48-72 hours under the conditions that the vacuum degree is 6-10 Pa and the temperature is-30 to-50 ℃ to obtain a dried sample B; 4) and carbonizing the sample B for 4-6 hours at the temperature of 500-700 ℃ in a nitrogen atmosphere to obtain the carbonized lotus leaves. The method for preparing the photothermal conversion material based on the lotus leaves has the advantages of low preparation cost, good repeatability, simple process, capability of realizing large-scale production and the like, and the obtained carbonized lotus leaves have the performances of hydrophilicity, water transmission channels, strong photothermal absorption and the like, and can be applied to the field of solar water evaporation.
Description
Technical Field
The invention belongs to the technical field of solar photo-thermal conversion material preparation, and particularly relates to a method for preparing a photo-thermal conversion material based on lotus leaves, and application of the photo-thermal conversion material to a novel water vapor generation device.
Background
With the continuous progress of science and technology, the problems of environmental pollution and energy shortage are increasingly highlighted, and research and development of novel green and environment-friendly materials to obtain required resources are an important way for solving the problems of environment and energy. As is well known, sunlight is the most abundant resource in the world and can in principle meet global energy needs, such as solar steam power generation and solar water evaporation. Solar water evaporation technology has proven to be a promising technology for pure water by utilizing abundant renewable energy and is considered to be highly conducive to water purification using sustainable energy. Seawater is the largest water resource pool at present, but cannot be directly drunk or utilized. At present, the seawater desalination technology mainly comprises multi-stage flash evaporation and reverse osmosis technology. The multistage flash evaporation technology utilizes a plurality of flash evaporation chambers to be connected in series, so that the pressure in the chambers is reduced step by step, the seawater is cooled step by step, and the desalinated water is continuously produced; but the engineering investment is high, which is 2 times of that of the reverse osmosis method, the power consumption is large, the operation flexibility of the equipment is small, which is 80-110% of the design value, and the method is not suitable for the occasions with variable water making quantity requirements. The reverse osmosis technology pressurizes seawater by a high-pressure pump, the seawater enters a membrane desalination device, and the produced intermediate fresh water product enters an after-treatment facility to be refined into final product fresh water, but the reverse osmosis membrane has short service life and is easy to be polluted. The methods are already industrially applied in many areas, but the methods depend on and consume a large amount of fuel or electric power seriously, and the popularization and application of solar seawater desalination are limited seriously. Estimated to produce 100000m per day3The desalted water consumes 130 million tons of crude oil every year, thereby causing environmental problems such as global greenhouse effect, air pollution and the like and problems of fossil energy exhaustion. In addition, fresh water supply is more important in islands where there is no reliable energy supply.
Therefore, if the solar energy is utilized to desalt the sea water and the biological material which is easily obtained in life is used for solar photo-thermal conversion, the cost is greatly reduced and the solar energy-based solar energy desalination system is rapidly popularized and applied to the aspects of sea water desalination and the like. The lotus leaves are widely distributed all over the world, can be rapidly propagated in large quantities, and cover the water surface in a large area; meanwhile, the surface of the leaf is covered with micron-sized hill-shaped structures and nanometer-sized hair-shaped structures, so that the hydrophobicity of the surface of the lotus leaf is caused. To date, there has been no report of the use of lotus leaves for water evaporation.
Disclosure of Invention
The invention aims to provide a method for preparing a photothermal conversion material based on lotus leaves and application of the photothermal conversion material in a water vapor generation device, aiming at overcoming the defects in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for preparing a photothermal conversion material based on lotus leaves specifically comprises the following steps:
step 1, taking fresh lotus leaves, then placing the lotus leaves in deionized water for ultrasonic cleaning, and naturally airing;
step 2, putting the lotus leaf leaves cleaned and dried in the step 1 into a refrigerator freezing chamber, and freezing for 12-24 hours at the temperature of-18 to-24 ℃ to obtain a frozen sample A;
step 3, putting the frozen sample A obtained in the step 2 into a vacuum freeze drying oven, and drying for 48-72 hours under the conditions that the vacuum degree is 6-10 Pa and the temperature is-30 to-50 ℃ to obtain a dried sample B;
and 4, putting the sample B obtained in the step 3 into a tube furnace, and carbonizing for 4-6 hours at the temperature of 500-700 ℃ in the nitrogen atmosphere to obtain black carbonized lotus leaves, namely the photo-thermal conversion material.
At present, solar water vapor generation equipment reflects parallel sunlight through a light-gathering cover, and a convex lens focuses the sunlight onto a heating tank, so that low-boiling-point liquid in the heating tank reaches a boiling state, further water vapor is generated, and the requirement on the equipment is high. Based on the above, the invention provides a novel water vapor generation device, which comprises a heat insulation layer, a water supply layer and a light-heat conversion layer which are sequentially arranged above water, wherein the light-heat conversion layer at the top layer effectively absorbs light and converts the light into heat, the water supply layer at the middle layer transmits and stores water, the heat insulation layer at the bottom layer usually has a lower heat conductivity coefficient, the heat loss of water can be effectively reduced, and the overall efficiency of solar steam power generation is improved.
Further, the water supply layer may be filter paper, dust-free paper, or the like; the heat insulation layer can be polystyrene foam, polyurethane foam, polyethylene foam plastic and the like.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a method for preparing a photothermal conversion material based on lotus leaves, which adopts a vacuum freeze drying technology and has the advantages of low preparation cost, good repeatability, simple process, realization of large-scale production and the like.
2. The carbonized lotus leaves obtained by the method have hydrophilicity, are beneficial to water transmission and steam escape, can increase light absorption by the carbonized black lotus leaves, have the performances of hydrophilicity, a water transmission channel, strong light and heat absorption and the like, and can be applied to the field of solar water evaporation.
3. The carbonized lotus leaves obtained by the method can be used as a photo-thermal conversion material to be applied to a novel water vapor generating device, the excellent physical and chemical properties of the carbonized lotus leaves are organically combined with the water vapor generating device with a three-layer structure, the carbonized lotus leaves have hydrophilicity, a water transmission channel and stronger light absorption intensity, the carbonized lotus leaves can be applied to the water vapor generating device to further improve the solar water evaporation conversion efficiency and reduce the cost, and the carbonized lotus leaves have wide application prospects in the aspects of seawater desalination, heat conversion, solar power generation and the like.
Drawings
FIG. 1 is a contact angle test chart of fresh lotus leaves, dried lotus leaves and carbonized lotus leaves;
FIG. 2 is an SEM image of dried and carbonized lotus leaves; wherein (a), (b) and (c) are SEM of dried lotus leaves; (d) SEM pictures of carbonized lotus leaves;
FIG. 3 is a schematic diagram of fresh lotus leaf and carbonized lotus leaf (a), and Raman test curves of fresh lotus leaf, dried lotus leaf and carbonized lotus leaf (b);
FIG. 4 is a schematic view of a steam generator according to an embodiment, and a temperature and weight change curve of light irradiation with or without carbonized lotus leaves; wherein, (a) is a schematic diagram of the water vapor generation device obtained in the embodiment, (b) is a change curve of the surface temperature of the water vapor generation device obtained in the embodiment with time under the illumination with/without the carbonized lotus leaves, and (c) is a change curve of the weight of the water vapor generation device obtained in the embodiment with time under the illumination with/without the carbonized lotus leaves.
Detailed Description
The technical scheme of the invention is detailed below by combining the accompanying drawings and the embodiment.
A method for preparing a photothermal conversion material based on lotus leaves specifically comprises the following steps:
step 1, taking a certain amount of fresh lotus leaves, and then placing the lotus leaves in deionized water for ultrasonic cleaning, wherein the ultrasonic cleaning time is 10-20 min and the ultrasonic frequency is 50-60 Hz; after the ultrasonic treatment is finished, naturally airing, and selecting lotus leaves with flat surfaces and uniform shapes for later use, wherein the thickness of the selected lotus leaves is 0.5-1 mm, and the diameter of the selected lotus leaves is 2-4 cm;
step 2, placing the lotus leaf leaves selected for standby in the step 1 into a refrigerator freezing chamber, and freezing for 12-24 hours at the temperature of-18 to-24 ℃ to obtain a frozen sample A;
step 3, putting the frozen sample A obtained in the step 2 into a vacuum freeze drying oven, and drying for 48-72 hours under the conditions that the vacuum degree is 6-10 Pa and the temperature is-30 to-50 ℃ to obtain a dried sample B;
and 4, placing the sample B obtained in the step 3 in a tube furnace, heating to 500-700 ℃ at a heating rate of 2-4 ℃/min in a nitrogen atmosphere, and preserving heat at 500-700 ℃ for 4-6 hours to carbonize the sample B to obtain black carbonized lotus leaves, namely the photothermal conversion material.
The carbonized lotus leaves obtained by the method can be used as a photothermal conversion material to be applied to a water vapor generating device, the top layer of the water vapor generating device is a photothermal conversion layer, the carbonized lotus leaves are used for absorbing and converting light, the middle layer is a water supply layer, materials such as filter paper and the like are used for transmitting and storing water, the bottom layer is a heat insulation layer, and foam and the like are used for realizing support and heat insulation, so that the heat loss under the illumination condition is reduced.
Examples
A method for preparing a photothermal conversion material based on lotus leaves specifically comprises the following steps:
step 1, taking a certain amount of fresh lotus leaves, and then placing the lotus leaves in deionized water for ultrasonic cleaning, wherein the ultrasonic frequency is 50Hz, and the time is 15 min; after the ultrasonic treatment is finished, naturally airing, and selecting the lotus leaf blades with flat surfaces and uniform shapes for later use, wherein the thickness of the selected lotus leaf blades is about 0.5mm, and the diameter of the selected lotus leaf blades is about 2.5 cm;
step 2, placing the lotus leaf leaves selected for standby in the step 1 into a refrigerator freezing chamber, and freezing for 24 hours at the temperature of-18 ℃ to obtain a frozen sample A;
step 3, putting the frozen sample A obtained in the step 2 into a vacuum freeze drying oven, and drying for 72 hours under the conditions that the vacuum degree is 8Pa and the temperature is-45 ℃ to obtain a dried lotus leaf sample B;
and 4, placing the sample B obtained in the step 3 in a tubular furnace, heating to 500 ℃ at the heating rate of 2 ℃/min in the nitrogen atmosphere, and preserving heat for 6 hours at 500 ℃ to carbonize the sample B to obtain black carbonized lotus leaves, namely the photothermal conversion material.
FIG. 1 is a contact angle test chart of fresh lotus leaves selected for use in step 1, dried lotus leaves obtained in step 3, and carbonized lotus leaves obtained in step 4 of the example; as can be seen from fig. 1, the contact angles of the fresh lotus leaf and the dried lotus leaf surface are not changed greatly, but are hydrophobic, and after the carbonization treatment, the contact angle of the lotus leaf surface is reduced to about 10 ° and becomes a hydrophilic surface, which is beneficial to the transmission of water and the escape of water vapor.
FIG. 2 is SEM images of dried lotus leaves (a-c) obtained in step 3 and carbonized lotus leaves (d-f) obtained in step 4 of example; as can be seen from fig. 2, the dried lotus leaf obtained in step 3 of the example has micron-sized protrusions and nano-sized fluffy substances on the surface, the micron-nano composite structure on the lotus leaf surface is the main reason for the hydrophobicity of the lotus leaf surface, and the carbonized lotus leaf obtained after carbonization treatment has the advantages that the nano-sized fluff on the surface disappears, the micron-sized protrusions also shrink, the volume is reduced, and the surface becomes smooth, which is preliminarily proved to be the main reason for the disappearance of the hydrophobicity.
FIG. 3 is a schematic diagram (a) of the fresh lotus leaves to be used selected in the step 1 and the carbonized lotus leaves obtained in the step 4 in the embodiment, and a Raman test curve (b) of the fresh lotus leaves to be used selected in the step 1, the dried lotus leaves obtained in the step 3 and the carbonized lotus leaves obtained in the step 4 in the embodiment; as can be seen from FIG. 3(a), there are many chemical bonds on the surface of fresh lotus leaf and carbonized lotus leaf, such as C-C, C-O, etc., and the Raman spectrum of FIG. 3(b) shows that the main chemical groups on the surface of fresh lotus leaf and dried lotus leaf are not changed, and the carbonized lotus leaf has no obvious new peak although the chemical bonds are shifted, and thus it can be determined that the surface chemical bonds are not the main reason for changing the surface hydrophobicity into hydrophilicity.
The carbonized lotus leaves obtained in the embodiment are used as a photothermal conversion material to be applied to a water vapor generating device, the top layer of the water vapor generating device is a photothermal conversion layer, the carbonized lotus leaves are used for absorbing and converting light, the middle layer is a water supply layer, filter paper is used for transmitting and storing water, the bottom layer is a heat insulation layer, and foam is used for realizing support and heat isolation, so that heat loss under the illumination condition is reduced.
FIG. 4 is a schematic view of a steam generator (a) obtained in the example, and temperature and weight change curves (b to c) of light irradiation with and without carbonized lotus leaves; as can be seen from FIG. 4, the surface temperature of the steam generator with carbonized lotus leaves rises much faster than that of the steam generator without carbonized lotus leaves and at a higher temperature in the same time, which is very beneficial to the evaporation of water, and the evaporation efficiency of the steam generator with carbonized lotus leaves reaches 3.6kg/m2Compared with a water vapor generating device (water) without carbonized lotus leaves, the water vapor generating device (water) is improved by more than 2 times.
In conclusion, the invention provides a method for preparing a photothermal conversion material based on lotus leaves and application of the photothermal conversion material in a water vapor generation device, the preparation method is simple, the cost is low, the method is suitable for large-scale industrial production, and the water evaporation efficiency is effectively improved.
Claims (1)
1. A novel steam generation device comprises a heat insulation layer, a water supply layer and a light-heat conversion layer which are arranged in sequence, and is characterized in that the light-heat conversion layer is prepared by adopting the following method:
step 1, taking fresh lotus leaves, cleaning and naturally drying;
step 2, putting the lotus leaf leaves cleaned and dried in the step 1 into a refrigerator freezing chamber, and freezing for 12-24 hours at the temperature of-18 to-24 ℃ to obtain a frozen sample A;
step 3, putting the frozen sample A obtained in the step 2 into a vacuum freeze drying oven, and drying for 48-72 hours under the conditions that the vacuum degree is 6-10 Pa and the temperature is-30 to-50 ℃ to obtain a dried sample B;
step 4, putting the sample B obtained in the step 3 into a tube furnace, and carbonizing for 4-6 hours at the temperature of 500-700 ℃ in the nitrogen atmosphere to obtain black carbonized lotus leaves, namely the photo-thermal conversion material;
the water supply layer is made of filter paper or dust-free paper, and the heat insulation layer is made of polystyrene foam, polyurethane foam or polyethylene foam plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811579258.6A CN109575886B (en) | 2018-12-24 | 2018-12-24 | Method for preparing photo-thermal conversion material based on lotus leaves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811579258.6A CN109575886B (en) | 2018-12-24 | 2018-12-24 | Method for preparing photo-thermal conversion material based on lotus leaves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109575886A CN109575886A (en) | 2019-04-05 |
| CN109575886B true CN109575886B (en) | 2021-02-02 |
Family
ID=65931458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811579258.6A Active CN109575886B (en) | 2018-12-24 | 2018-12-24 | Method for preparing photo-thermal conversion material based on lotus leaves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109575886B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030743B (en) * | 2019-04-18 | 2021-02-09 | 菏泽学院 | Preparation method and application of MOFs (metal-organic frameworks)/biomass-based carbon composite photothermal conversion material based on interface photothermal conversion |
| CN110513668A (en) * | 2019-08-22 | 2019-11-29 | 陕西科技大学 | A kind of super hydrophilic carbonization potato foam and preparation method thereof and in the aborning application of solar steam |
| CN111285704B (en) * | 2020-01-19 | 2022-04-26 | 陕西科技大学 | Cellulose source carbon-based photothermal conversion material for seawater desalination and preparation method thereof |
| CN111747747B (en) * | 2020-07-17 | 2022-03-18 | 重庆大学 | Preparation method, product and application of carbon-based material with bionic fractal structure based on shaddock peel |
| CN112898954B (en) * | 2021-01-22 | 2021-11-16 | 武汉纺织大学 | Pleurotus eryngii based photothermal conversion material and preparation method thereof |
| CN112850832B (en) * | 2021-01-22 | 2022-11-08 | 南京信息工程大学 | Functional lotus leaf device, preparation method and application |
| CN115448401B (en) * | 2022-09-06 | 2024-08-30 | 青岛科技大学 | Solar seawater evaporator with self-floating jellyfish-like structure, preparation method and application |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365144A (en) * | 2016-08-31 | 2017-02-01 | 青岛大学 | Method for preparing lotus leaf carbon nanometer material |
| CN106673896A (en) * | 2016-12-12 | 2017-05-17 | 浙江科技学院 | Lotus leaf carbon based fertilizer and preparation method thereof |
| CN107352536A (en) * | 2017-08-15 | 2017-11-17 | 中国工程物理研究院激光聚变研究中心 | The preparation method of burnt FOLIUM NELUMBINIS based super capacitor electrode material |
| CN107487801A (en) * | 2017-08-11 | 2017-12-19 | 桂林电子科技大学 | A kind of preparation method for the porous charcoal piece for realizing the conversion of efficiency light vapours |
| CN107606593A (en) * | 2017-08-11 | 2018-01-19 | 桂林电子科技大学 | A kind of steam raising plant based on surface local photothermal deformation |
| CN107604756A (en) * | 2017-08-11 | 2018-01-19 | 桂林电子科技大学 | A kind of paper substrate composite light absorption material for realizing efficient photothermal conversion and preparation method thereof |
| CN108821257A (en) * | 2018-05-02 | 2018-11-16 | 福建农林大学 | A kind of binary based on lotus leaf is mesoporous-micropore multilevel structure biological carbon and its preparation method and application |
-
2018
- 2018-12-24 CN CN201811579258.6A patent/CN109575886B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365144A (en) * | 2016-08-31 | 2017-02-01 | 青岛大学 | Method for preparing lotus leaf carbon nanometer material |
| CN106673896A (en) * | 2016-12-12 | 2017-05-17 | 浙江科技学院 | Lotus leaf carbon based fertilizer and preparation method thereof |
| CN107487801A (en) * | 2017-08-11 | 2017-12-19 | 桂林电子科技大学 | A kind of preparation method for the porous charcoal piece for realizing the conversion of efficiency light vapours |
| CN107606593A (en) * | 2017-08-11 | 2018-01-19 | 桂林电子科技大学 | A kind of steam raising plant based on surface local photothermal deformation |
| CN107604756A (en) * | 2017-08-11 | 2018-01-19 | 桂林电子科技大学 | A kind of paper substrate composite light absorption material for realizing efficient photothermal conversion and preparation method thereof |
| CN107352536A (en) * | 2017-08-15 | 2017-11-17 | 中国工程物理研究院激光聚变研究中心 | The preparation method of burnt FOLIUM NELUMBINIS based super capacitor electrode material |
| CN108821257A (en) * | 2018-05-02 | 2018-11-16 | 福建农林大学 | A kind of binary based on lotus leaf is mesoporous-micropore multilevel structure biological carbon and its preparation method and application |
Non-Patent Citations (3)
| Title |
|---|
| Floatable, Self-Cleaning, and Carbon-Black-Based Superhydrophobic Gauze for the Solar Evaporation Enhancement at the Air−Water Interface;Yiming Liu;《ACS Appl. Mater. Interfaces》;20150601(第7期);第13645-13652页 * |
| Hierarchical Porous Carbonized Lotus Seedpods for Highly Efficient Solar Steam Generation;Jing Fang;《Chem. Mater.》;20181208(第30期);第6217-6221页 * |
| Solar steam generation by heat localization;Hadi Ghasemi;《NATURE COMMUNICATIONS》;20140721;第5449页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109575886A (en) | 2019-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109575886B (en) | Method for preparing photo-thermal conversion material based on lotus leaves | |
| CN110143645B (en) | Solar photo-thermal membrane distillation device | |
| CN110746657B (en) | Preparation method and application of composite biomass aerogel photothermal conversion material | |
| CN113307321B (en) | Solar interface evaporator and application thereof | |
| CN110105917B (en) | Photo-thermal composite material and preparation method and application thereof | |
| CN107487801B (en) | Preparation method of porous charcoal piece for realizing efficient photo-thermal steam conversion | |
| Arunkumar et al. | A review on carbonized natural green flora for solar desalination | |
| CN102060340B (en) | Automatic solar film distillation seawater desalting device | |
| CN110183572B (en) | Aerogel, preparation method and application of aerogel as solar evaporator | |
| CN106809897A (en) | For desalinization and the Graphene photothermal conversion materiat preparation method of clean water treatment | |
| Zhang et al. | Improving seawater desalination efficiency by solar driven interfacial evaporation based on biochar evaporator of Nannochloropsis oculata residue | |
| CN111892742A (en) | Photo-thermal conversion polymer solar energy absorption material and preparation method and application thereof | |
| CN113247979A (en) | Solar photo-thermal utilization system | |
| CN110844959A (en) | Photothermal water evaporation device based on loofah sponge biomass | |
| CN106966453A (en) | The sea water desalinating unit and system of wind light mutual complementing coupling | |
| CN201634461U (en) | Floating type automatic seawater desalination equipment | |
| CN111977734B (en) | Photo-thermal evaporation and waste heat recovery integrated device and application thereof | |
| CN210419368U (en) | Solar photo-thermal membrane distillation device | |
| CN112794307A (en) | Preparation method of double-layer integral photo-thermal conversion material | |
| CN115448401B (en) | Solar seawater evaporator with self-floating jellyfish-like structure, preparation method and application | |
| CN102134138B (en) | Solar multi-effect utilization seawater desalting method and device | |
| CN112093790B (en) | Preparation method and application of porous carbonized sugarcane capable of realizing efficient photo-thermal conversion | |
| CN110437496B (en) | Polysiloxane aerogel composite material for efficient water evaporation and preparation method and application thereof | |
| CN111960402A (en) | Preparation method of photo-thermal material for solar water evaporation | |
| CN202016925U (en) | Solar multiple-effect utilization seawater desalinization device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |