The article "Waste Water Treatment Using Piezoelectric Materials: A Review on Piezo-photocatalysis" by Karambir Singh et al. explores the emerging field of piezo-photocatalysis, which combines piezoelectric materials with photocatalysis to enhance water purification efficiency. The authors highlight the significant role of piezoelectric materials in water treatment, particularly in the context of industrialization and population growth leading to water contamination. They discuss the historical background of piezoelectricity, its fundamental principles, and the conditions under which it occurs. The paper also reviews the potential applications of piezoelectric materials beyond water treatment, such as hydrogen production and carbon dioxide adsorption. Specific compounds like lead, barium, KNN, and bismuth perovskite are discussed for their effectiveness in wastewater treatment, achieving near-100% efficiency when combined with photocatalysis. The article provides a comprehensive overview of the mechanisms and applications of piezo-photocatalysis, emphasizing its potential to address water purification challenges.The article "Waste Water Treatment Using Piezoelectric Materials: A Review on Piezo-photocatalysis" by Karambir Singh et al. explores the emerging field of piezo-photocatalysis, which combines piezoelectric materials with photocatalysis to enhance water purification efficiency. The authors highlight the significant role of piezoelectric materials in water treatment, particularly in the context of industrialization and population growth leading to water contamination. They discuss the historical background of piezoelectricity, its fundamental principles, and the conditions under which it occurs. The paper also reviews the potential applications of piezoelectric materials beyond water treatment, such as hydrogen production and carbon dioxide adsorption. Specific compounds like lead, barium, KNN, and bismuth perovskite are discussed for their effectiveness in wastewater treatment, achieving near-100% efficiency when combined with photocatalysis. The article provides a comprehensive overview of the mechanisms and applications of piezo-photocatalysis, emphasizing its potential to address water purification challenges.