Transient nanomaterials and stimuli-driven transformation pathways for clean energy applications and environmental remediation

The growing use of nanomaterials in clean energy and remediation has led to unintended consequences, including long-term persistence, secondary contamination, and accumulation in the natural environment. Traditional materials design has focused on stability and durability, but those qualities could be liabilities if materials outlive their intended purpose. This study suggests using transient nanomaterials as a design paradigm, in which materials are engineered to perform optimally for a specific period of time and then undergo controlled transformation, deactivation, or disappearance. The review focuses on the conceptualization of transient nanomaterials and how they may be distinguished from degradable, recyclable, and stimuli-responsive materials. Strategies are proposed for manipulating the material’s lifespan using light, pH, redox, or heat. Controlling structure and speed are also discussed for optimal performance over time. Transient photocatalysts, electrocatalysts, and self-sacrificing systems for pollutant removal are discussed, with the potential to reduce post-use problems and other pollution by eliminating secondary effects. The review also discusses issues such as lifecycle sustainability, safety, and regulatory implications, presenting transience as a cross-cutting design philosophy for sustainable nanotechnology.