Cover Picture

The diversity of water pH values is a key factor that restricts the practical application of photocatalytic water purification. The construction of liquid (water)–liquid (oil)–solid (semiconductor) (L–L–S) triphase interface microenvironment makes the organic molecule adsorption pH independent and prevents the semiconductor from being corroded by strong acidic/alkaline solutions, leading to a stable and efficient photocatalytic reaction over a wide pH range (1–14). These findings reveal a promising path for the development of high-performance catalysis systems applicable in complex water environments. More details are discussed in the article by Feng et al. on pages 3349—3354.