“Flowers protector”: Sacrificing “flowers” to guard more NH4+ by a novel Bi2MoO6@BiMOF photocatalyst

Combining pollutant degradation with nitrogen fixation has great potential for converting wastewater into suitable irrigation water. This approach purifies water by removing pollutants and provides essential nitrogen fertilizer nutrients to crops. In our investigation, we have introduced a new composite photocatalyst made by ligand anchoring Bi source of Bi 2 MoO 6 to reform BiMOF on the surface of sea-urchin-like Bi 2 MoO 6 spheres through the use of a solvothermal method. The 3D sea urchin spheres containing Bi 2 MoO 6 @BiMOF possess a large specific surface area and close-knit interfacial contacts, enabling ample channels for carrier migration. The composite has displayed impressive proficiency in breaking down pollutants and ammonia production. The elaborate, multi-channel structure within Bi-MOF enabled efficient N 2 or organic molecule adsorption, and Bi 2 MoO 6 generated plentiful photocarriers in reaction to visible light. The diverse interface between Bi 2 MoO 6 and BiMOF guaranteed successful photocarrier separation. The addition of methylene solution increased the yield of nitrogen fixation to 3080 (μmol/L/h/g), which is 15 times higher than that achieved in pure water. As the old saying goes, ``Falling red is not an unfeeling thing, it turns into spring mud and protects the flowers even more'', here although the addition of N 2 leads to a decrease in the degradation efficiency of methylene blue (MB), the addition of methylene blue (MB) consumes more holes and thus generates more photogenerated electrons, which greatly contributes to the production of NH 4 + and thus its application in agriculture. Additionally, These valuable insights highlight the possibility of transforming contaminated water into nutrient-rich, clean irrigation water for agricultural sustainability.