The article discusses the detrimental impact of fossil fuel consumption on the environment, leading to issues like acid rain and global warming. It highlights the increasing demand for renewable energy sources due to the rise in energy requirements from urbanization and industrialization. Solar energy is emphasized as a plentiful and environmentally friendly resource that can be harnessed through technologies like photocatalytic water splitting to produce hydrogen. The high energy density of hydrogen makes it a promising secondary energy source, surpassing traditional fossil fuels. Additionally, the article explores the synthesis of ammonia as a clean and green energy alternative through methods like photocatalytic nitrogen reduction, reducing the need for fossil fuel-intensive processes like the Haber-Bosch method. Semiconductor materials, especially titanium oxide, are identified as effective photocatalysts for energy applications, offering cost-effective and sustainable solutions for hydrogen and energy production. Strategies to enhance the photocatalytic efficiency of titanium oxide are also discussed to optimize its performance in harnessing solar energy for sustainable energy generation.