Why photocatalysis is an environment friendly process?
Harnessing Sustainable Energy: A Focus on Photocatalysts
The dilemma of exploiting the environment to address energy deficits has become a pressing concern in contemporary society. Lately, the limelight has been on photocatalysts as they promise a green alternative that strikes a balance between energy generation and environmental conservation. Photocatalysts harness the power of light to instigate and modulate chemical reactions.
A standout feature of these catalysts is their ability to produce hydrogen by splitting water solely with the assistance of sunlight, without releasing carbon dioxide, a sharp contrast to the carbon footprint left by fossil fuels. To ensure the efficacy of this catalytic process, it’s essential to use a semiconductor with minimal recombination. Further, the ideal photocatalyst would be cost-effective, potent, and resilient.
Initially, the research in this area was primarily centered around photocatalysts like titanium dioxide (TiO2) that are activated by ultraviolet light. However, the quest for maximizing solar energy utilization has led to exploring photocatalysts responsive to visible light. One such promising material is graphitic carbon nitride (g-C3N4), an organic semiconductor. It’s garnering attention due to its straightforward creation process, durability, affordability, and its favorable reaction to visible light. This material can endure temperatures as high as 500°C and exhibits chemical stability across varied pH levels.
Historically, g-C3N4 was first identified in the early 19th century by pioneers Berzelius and Liebig as a polymer known as “melon”. The modern-day significance of g-C3N4 in the realm of photocatalysis was recognized in 2006 by a study led by Wang and team, which found its capability to split water using light. This groundbreaking discovery propelled its application in diverse photocatalytic processes. Furthermore, one of g-C3N4’s unique advantages is its cost-effective synthesis, relying only on carbon and nitrogen. Its structure and texture can be effortlessly modified. Moreover, notably, it can be derived from a range of precursors, including melamine and cyanamide, among others.
However, like many innovations, g-C3N4 isn’t without its challenges. Its high recombination rate hinders its potential as a photocatalyst. Innovative strategies, such as establishing heterogeneous junctions and manipulating morphology, are being pursued to negate this shortcoming. Lastly, advances in morphological adjustments have notably enhanced its surface area, furthering its efficacy.
Why photocatalysis is an environment friendly process?
Innovations in large-scale environmental and energy applications – ScienceDirect
Catalysts | Free Full-Text | Eco-Friendly Photocatalysts for Degradation of Dyes (mdpi.com)
