CN-121978185-A - Real-time analysis method for osmotic energy conversion performance

CN121978185ACN 121978185 ACN121978185 ACN 121978185ACN-121978185-A

Abstract

The invention relates to the technical field of information, in particular to a real-time analysis method for permeability conversion performance, which comprises the steps of mixing natural nanofiber dispersion liquid and light-responsive transition metal oxide dispersion liquid, preparing a composite film by adopting a film forming process, removing moisture and improving mechanical strength by heat treatment, and placing the composite film in an electrolyte solution environment to realize photoinduction current generation and permeability conversion based on concentration gradient into electric energy, wherein the photoinduction current and incident light intensity are in linear relation, the baseline is restored after illumination disappears, and the permeability conversion power density is enhanced by illumination under asymmetric concentration gradient.

Inventors

ZHOU TENG
HE XIAOHAN
WAN SHICHENG
WU HAILIANG
WEN LIPING
SHI LIUYONG
YAN HONG

Assignees

海南大学

Dates

Publication Date: 20260505
Application Date: 20260123

Claims (10)

1. A method for real-time analysis of osmotic energy transfer performance, the method comprising: mixing natural nanofiber dispersion liquid and light-responsive transition metal oxide dispersion liquid, preparing a composite film by adopting a film forming process, and performing heat treatment to remove water and improve mechanical strength; the composite membrane is placed in an electrolyte solution environment, so that photoinduction current generation or concentration gradient-based osmotic energy to electric energy conversion can be independently realized, wherein the photoinduction current and the incident light intensity are in linear relation, the baseline is recovered after illumination disappears, and the osmotic energy conversion power density is enhanced by illumination under asymmetric concentration gradient; and collecting output power related data in the osmotic energy conversion process in real time, and completing real-time analysis of osmotic energy conversion performance.
2. A method of real time analysis of osmotic energy conversion properties according to claim 1 wherein said natural nanofiber dispersion is mixed with a light responsive transition metal oxide dispersion comprising: Obtaining the natural nanofiber dispersion and the light responsive transition metal oxide dispersion; Mixing the natural nanofiber dispersion with the light responsive transition metal oxide dispersion according to a mass ratio determined by material properties and film forming requirements; and carrying out ultrasonic treatment after mixing to realize uniform doping, wherein the light-responsive transition metal oxide presents uniform element distribution on the section of the composite film.
3. A method for real-time analysis of osmotic energy conversion properties according to claim 2, wherein said post-mixing sonication to achieve uniform doping comprises: Performing ultrasonic treatment on the mixed dispersion liquid to adapt the time length required by uniform mixing; And judging whether the light-responsive transition metal oxide is uniformly doped according to the element distribution state of the cross section of the composite film.
4. The method for real-time analysis of osmotic energy conversion performance according to claim 1, wherein said preparing a composite membrane by a film forming process comprises: A suction filtration film forming process is adopted, and a flexible self-supporting film is obtained through suction filtration of a filter medium with porous supporting characteristics and adapting to film forming requirements under vacuum degree; If a microfluidic continuous film forming process is employed, the composite film is obtained by injecting the mixed dispersion into a microchannel and shaping in a coagulation bath.
5. The method of claim 1, wherein said placing said composite membrane in an electrolyte solution environment independently achieves photoinduced ion current generation, comprising: Cutting the composite membrane into a membrane with a preset size and fixing the membrane into electrochemical cells filled with electrolyte solution with equal concentration at two sides through a clamping structure with an ion transmission channel reserved in the middle; Inserting reference electrodes at two sides and connecting a picoampere meter; Applying illumination after recording a baseline ion current in the absence of illumination, producing said light-induced ion current linearly related to light intensity, wherein no external bias voltage is applied; And determining that ion transmission is not preferentially oriented according to the ion current-voltage curve of the composite film in the electrolyte solution with the equal concentration, wherein the ion current-voltage curve is symmetrical about an origin, and generating pure light-induced net ion current, wherein the pure light-induced net ion current is ion current after the baseline ion current measured in the electrolyte environment with the equal concentration and without illumination is removed, and the light-induced ion current can independently operate.
6. The method for real-time analysis of osmotic energy conversion performance according to claim 1, wherein said placing said composite membrane in an electrolyte solution environment, said osmotic energy conversion to electrical energy based on a concentration gradient, comprises: placing the composite membrane between electrolyte solutions with concentration gradients on both sides; Ion selective transmission driven by the concentration gradient under no illumination to generate osmotic potential and output power; after illumination is applied, the surface temperature of the composite film is increased through a photo-thermal effect, so that the selective transmission of ions is enhanced, and the output power density is increased; the illumination can be used as a measured signal or an enhancement means for improving the output power of the osmotic energy under different working conditions, and the conversion from the osmotic energy to the electric energy can be independently operated.
7. The method for real-time analysis of performance of osmotic energy conversion according to claim 1, wherein the step of collecting output power related data in the osmotic energy conversion process in real time comprises: continuously collecting potential difference and ion current data on two sides of the composite membrane through an electrode system and detection equipment in the osmotic energy conversion process; and calculating corresponding output power data in real time according to the acquired potential difference and ion current data.
8. The method of claim 7, wherein said performing the real-time analysis of the osmotic energy transfer performance comprises: comparing output power data obtained through real-time calculation with performance evaluation standards set on the basis of requirements of the osmotic energy conversion application scene, wherein the performance evaluation standards at least comprise a power density stability threshold value and a response consistency index; judging the stability and the quality grade of the osmotic energy conversion performance in real time according to the comparison result; If the abnormal performance is detected, a light enhancement mechanism can be triggered or the concentration gradient of the electrolyte solution can be adjusted to optimize the osmotic energy conversion performance.
9. The method of claim 1, wherein the natural nanofibers comprise cotton nanofibers, wood nanofibers, or bamboo nanofibers, and the light responsive transition metal oxide is manganese dioxide.
10. The method of claim 1, wherein the electrolyte solution comprises a potassium chloride, sodium chloride, lithium chloride, magnesium chloride, or calcium chloride solution.

Description

Real-time analysis method for osmotic energy conversion performance Technical Field The invention belongs to the technical field of information, and particularly relates to a real-time analysis method for osmotic energy conversion performance. Background In practical application scenes such as environmental monitoring, ocean resource development, intelligent agriculture and the like, the perception of illumination intensity and the energy collection of natural resources are often required to be simultaneously realized. For example, in coastal wetland monitoring, the regional illumination change is needed to evaluate the ecological environment, the osmotic energy at the junction of the seawater and the fresh water is expected to be collected to supply power for monitoring equipment, and in the field environment, the portable equipment is needed to have a light intensity sensing function and rely on sustainable energy supply, but the prior art is difficult to simultaneously meet the requirements. The prior art has obvious functional splitting and application limitation, on one hand, the traditional light intensity sensor is mostly dependent on a semiconductor device, is difficult to stably operate in a liquid phase and wet environment due to external power supply driving, is easy to cause performance attenuation due to humidity, is required to be packaged in a complex mode, and cannot adapt to a liquid phase application scene in a natural environment, on the other hand, the traditional penetration energy conversion technology is mostly of a single functional design, only energy collection can be realized, and the conversion efficiency is lack of effective enhancement means, is not integrated with a light intensity detection function, so that the device is required to be additionally matched with a sensor and a power supply module in practical application, and is complex in structure and high in deployment cost. More critical, illumination and permeation energy in natural environments of ocean and wetland are precious resources which exist simultaneously, but the prior art cannot cooperatively utilize the illumination and the permeation energy, so that the detection of the light intensity without a power supply cannot be realized through the light response characteristic, the practicability of the conversion of the permeation energy cannot be further improved by means of illumination, the resource waste is caused, and meanwhile, the integration and the portability development of equipment are limited. Therefore, on the premise of stable work in an external power supply, liquid phase or wet environment, an integrated technical scheme is developed, and meanwhile, the light intensity detection, the osmotic energy conversion and the real-time analysis of the osmotic energy conversion performance are realized, so that the problems of single function, dependence on external energy and lack of real-time performance feedback in the prior art are solved, and the real technical pain point to be solved urgently at present is achieved. Disclosure of Invention Therefore, the present invention is directed to a method for real-time analysis of osmotic energy conversion performance, so as to solve the problems of light intensity detection, osmotic energy conversion and real-time analysis of osmotic energy conversion performance. In order to achieve the above purpose, the technical scheme of the invention is realized as follows: mixing natural nanofiber dispersion liquid and light-responsive transition metal oxide dispersion liquid, preparing a composite film by adopting a film forming process, and performing heat treatment to remove water and improve mechanical strength; the composite membrane is placed in an electrolyte solution environment, so that photoinduction current generation or concentration gradient-based osmotic energy to electric energy conversion can be independently realized, wherein the photoinduction current and the incident light intensity are in linear relation, the baseline is recovered after illumination disappears, and the osmotic energy conversion power density is enhanced by illumination under asymmetric concentration gradient; and collecting output power related data in the osmotic energy conversion process in real time, and completing real-time analysis of osmotic energy conversion performance. Further, the natural nanofiber dispersion is mixed with a light responsive transition metal oxide dispersion comprising: Obtaining the natural nanofiber dispersion and the light responsive transition metal oxide dispersion; Mixing the natural nanofiber dispersion with the light responsive transition metal oxide dispersion according to a mass ratio determined by material properties and film forming requirements; and carrying out ultrasonic treatment after mixing to realize uniform doping, wherein the light-responsive transition metal oxide presents uniform element distribution on the section of the composite fil