Research On Extraction Of Protein Complexes From Spirulina And Research On Spirulina Biological Solar Cell

Spirulina biosolar cell could capture solar energy and generate electricity, as well asachieve zero CO2emissions, it has great development potential because of its cleanrecycling and high efficiency. This paper investigated the spirulina cultivation, extractionof photosynthetic protein, the construction of spirulina biosolar cell and the anodematerials of the cell.Spirulina was cultivated in medium Spirulina for expanding cultivation, and thegrowth condition was observed to make a biomass-time curve for analysis. In this paperphycobiliprotein was extracted from spirulina to composite with squaraine dye to sensitizenanocrystalline TiO2photoanode for building dye sensitized solar cell, and thephotoelectric properties of the cell also were investigated.We used living spirulina as novel photosensitizer to construct spirulina biosolar cell,optimized the structure of the cell and analyzed its photoelectric conversion efficiency.The results showed that spirulina had the photoelectric conversion effect, and could let thespirulina biosolar cell have70μA photocurrent. Meanwhile, the addition of glucosesucrose or chitosan in the spirulina anode chamber could make the maxima current densityof the cell greatly increased by80μA,100μA, and84μA, respectively, and the sucrosecould improve the maximum power density of the cell to63mW/m2.At last, we discussed the influence of different electrodes materials on theperformance of spirulina biosolar cell. Anthraquinone graphite electrode, quinhydronegraphite electrode, double-sided graphite electrode, nanocrystalline TiO2electrode andnanocrystalline TiO2sensitized with Cy3cyanine electrode were chosen as workingelectrodes on spirulina biosolar cell. They could make the maxima current density of thecell greatly increased by61μA,50μA,154μA,25μA and43μA, respectively, and theresults showed that the double-sided graphite electrode could obviously increase thephotocurrent. It was important to select the most appropriate electrode of spirulinabiosolar which could not only improve the photoelectric conversion efficiency of cell, butalso reduced the internal resistance to increase the output power of the cell.