Novel Solar Energy Based Photo-thermal Conversion Systems:Construction And Utilization Study

As a kind of clean energy with zero emission and green environmental protection,the effective development and utilization of solar energy can simultaneously solve the problem of environmental pollution and alleviate the energy crisis.Although the technologies related to solar development have become increasingly mature,the bottlenecks and constraints in the development are still the key to improve efficiency.Specifically,due to the instability of solar energy itself,it is susceptible to the influence of natural conditions such as cloudy,sunny,cloudy,rainy and day and night replacement,resulting in many defects in the supply of solar energy.Meanwhile,the defects of the energy obtained in production and use also lead to the disharmony between the actual demand and energy supply.Moreover,the existing solar energy conversion and utilization system aiming at pollutant resource conversion or experimental conditions are out of the actual scene,or the economic cost is high and difficult to apply,and there are few solar energy conversion systems in line with the reality.To solve above problems,this article from the solar light-thermal chemical conversion system constructing and the actual application perspective,in the form of the use of light energy in the study of how to avoid the timeliness and the limitations of the solar energy itself to achieve on-demand and reasonable use and how to expand the development of its resource into the new application in pollutant problem answer,The main research contents and results are as follows:(1)A modular integrated system is constructed by using supersaturated sodium acetate solution and copper sulphide foam.Under the clever coupling of mechanical trigger modules,solar-thermal conversion and spatio-temporal dissimilar storage and release are completed.In order to achieve long-term stability and efficient energy transfer of metastable phase change materials,necessary interface passivation design is carried out.The performance test results show that the coupling device shows excellent light absorption conversion and heat energy transfer and storage capacity,and the energy storage can be released by triggering,greatly reducing the dependence of real-time lighting,no matter in the simulated lighting of a single component or in the actual outdoor lighting condition of the 6-stage series system.It effectively balances the contradiction between solar energy timeliness supply and dynamic application demand,and provides a new strategy for efficient conversion and utilization of solar photothermal chemical system.(2)The two-dimensional lamellar titanium oxide film(TiO2-F)was synthesized on the surface of conductive glass by solvothermal method through process optimization,making it both a carrier and an active substance,which effectively improved the problems of difficult recovery,easy adhesion and poor interface contact in the use of powder catalyst.At the same time,the material can effectively adsorb concentrated Microcystis aeruginosa in water,and realize the photochemical resource recovery and utilization of the target pollutants,so as to build a new resource utilization system.Experimental studies have found that the system in the process of the solid phase catalytic material diffusion dynamics,the influence of TiO2-F with patina of algal photochemical reaction efficiency is low,and the reaction conditions of the restrictions by changing the system hard to overcome,show that the system development in photochemical approaches in algae for new applications in the field of solar energy substrate has certain limitations,The related reaction system needs to be further designed and improved.(3)On the basis of(2),the substrate TiO2 film was supported by Mo with the addition of ammonium molybdate tetrahydrate,so that the system had photothermal synergistic catalytic capacity.After comparing the load and the thickness of the film,the composite material with the best spectral absorption and photothermal conversion performance was selected to carry out the resource utilization experiment in the closed reactor.The results showed that the photothermal co-catalytic system was suitable for algae resource utilization,and the yield of high purity CO could reach 531.9 μmol g-1A after 5 h.The maximum productivity limit of the substrate per unit amount occurs in 58 hours of continuous light,and the cumulative CO production is as high as 4.9 mmol g-1A.In addition,the performance test results of the independent factors in the reaction system show that neither single factor resource recovery nor multiple factors superposition can achieve the effect of photothermal catalysis,because the synergistic effect of light and heat can effectively strengthen the material diffusion behavior and improve the reaction rate.To sum up,this study successively through targeted new system design and development of new scenarios,the successful implementation of the existing in current solar energy supply,limitation of capacity timeliness and application problem solving,make real-time dependencies and light energy mismatch between supply and demand situation,and effective governance pollutants in the environment at the same time realize recycling,Enriched the new paradigm for solar energy utilization.