PROCESS FOR PREPARATION OF 2-D NANOSTRUCTURED SHEET BASED PHOTOCATALYST AND APPLICATION THEREOF

Smart overview of the Invention

The invention introduces a novel process for creating a photocatalyst composed of two-dimensional (2-D) nanostructured sheets modified with nickel (Ni). This photocatalyst, referred to as mpg-C3NxNi, is designed to significantly enhance solar hydrogen production. The method utilizes a microwave-assisted synthesis approach, which is both cost-effective and efficient, enabling high rates of hydrogen generation under sunlight without substantial loss of activity.

Background

Research in photocatalysts has focused on maximizing visible light absorption and optimizing band edge positions for reactions like H⁺/CO₂ reduction. Existing methods often struggle with issues such as charge carrier separation and stability. Prior studies have explored various materials and methods, including graphene and carbon quantum dots, but these approaches have limitations in terms of efficiency and cost-effectiveness. The invention aims to address these challenges by providing a robust and efficient photocatalyst.

Objectives

The primary objective is to develop a simple and low-cost method for synthesizing 2-D nanostructured sheets modified with Ni. This involves using a one-pot microwave-assisted route to produce the mpg-C3NxNi photocatalyst. The invention seeks to achieve a drastic enhancement in solar hydrogen production, with rates ranging from 200,000 to 1,000,000 μmolg⁻¹h⁻¹ under sunlight, depending on the synthesis route. Additionally, the photocatalyst aims to efficiently convert CO₂ to CH₄.

Summary

The invention describes a facile synthesis method for creating atomically dispersed Ni modified 2-D nanostructured sheets. These sheets, made from mesoporous nitrogen-deficient C3Nx, are functionalized with Ni to enhance charge separation and solar fuel generation. The resulting mpg-C3NxNi photocatalyst shows improved solar hydrogen generation and selective CO₂ conversion to CH₄. The synthesis process is characterized by various spectroscopy and microscopy techniques, ensuring the formation of the desired heterostructure.

Conclusion

This innovation provides a significant advancement in photocatalyst technology, offering a method that is both efficient and economically viable. The process not only enhances solar hydrogen production but also improves the selectivity and efficiency of CO₂ conversion. By addressing the limitations of previous methods, this invention holds promise for practical applications in solar fuel generation.