الفهرس 
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Abstract
In the present work, the student survey on the points of research and collected in the first chapter. Polysulfanilic acid has a low efficiency for the photoelectrochemical (PEC) production of H2 from water splitting due to high recombination rate of charge and low electrical conductivity. Therefore, polyaniline was doped with polysulfanilic acid to form a copolymer and blend to enhance its PEC heterogeneous catalytic performance. That was achieved through the improvement of visible light absorption and charge carriers’ separation property. Herein, nine polymeric samples of polysulfanilic acid were synthesized by oxidative polymerization. The structural, morphological, and optical properties of the synthesized polymeric materials were investigated. Interestingly, these polymeric samples had multifunctional applications regarding their hydrogen generation efficiency. Photoelectrodes of different compositions from pure and blended polymers were prepared and used for the PEC solar hydrogen production from water. Different PEC parameters including; the oxidant role, monochromatic illumination wavelength, and electrode reusability were optimized towards the efficient hydrogen generation. Moreover, the PEC performance was evaluated using key indicators such as photocurrent density, conversion efficiency, and the number of hydrogen moles. The number of hydrogen moles was quantitively estimated to be 140.4, 160.2, and 300 μmol/h.g at -1V for the polymer, copolymer, and polymer blend, respectively, in presence of APS+FeCl3 as oxidant. Further, other samples of polymers showed antimicrobial properties against different species of bacteria. Hence, the present study may provide a cost-effective method to produce solar hydrogen fuel from water.