Investigation of phthalocyanine based 2D covalent microporous polymer (CMP) and 2D layered perovskite hybrid structure for photocatalytic water splitting reaction

January,15,2024 Today, global warming, caused by the rise in greenhouse gases due to industrialization and population growth, is leading to a severe increase in average temperatures on Earth's surface. These greenhouse gases include carbon dioxide (CO2), methane (CH4), nitrogen oxides (NOx) and chlorofluorocarbons (CFCs). These gases, which accumulate in the atmosphere and cause the sun's rays to remain on the surface longer, contribute to the increase in temperatures. Industrial activities and increasing energy needs have increased the use of fossil fuels, seriously increasing air pollution problems and global warming. This situation disrupts the environmental balance, causing several adverse effects, such as climate change and extreme weather events. Therefore, controlling greenhouse gas emissions and shifting towards sustainable energy sources is critical in solving these global problems. Hydrogen energy stands out as an essential approach to clean energy production. However, despite research in this field, this problem still needs to be solved effectively enough. Covalent microporous polymers (CMP) appear in different designs in the literature, are microscopically porous, and consist of building blocks connected by covalent bonds. Large surface areas and a structure with high p-conjugation are essential features of these polymers. With their wide range of building blocks and different synthesis techniques, they can be customized in many different areas of the industry, such as gas storage and adsorption, sensor technology, biological applications, heterogeneous catalysts, and photocatalytic water splitting. This research addresses the search for a solution to an efficient photocatalytic water-splitting reaction to contribute to the hydrogen economy with green hydrogen production. CMPs are used to solve the problem. CMPs in this study are composed of Phthalocyanine and [2,2'-bipyridine]-5,5'-dicarbaldehyde building blocks, which increases the π conjugation of the polymer. This covalent microporous structure containing imine bonds has been described for the first time in the literature. In this study, the effect of metal on photocatalytic water splitting studies was examined within the scope of zinc and nickel metals bonded on phthalocyanines. This study introduced a covalent micropore polymer photocatalyst with a stable structure to the literature. We have presented a CMP structure with different metal centers as a photocatalyst capable of producing hydrogen gas from water under illumination.