Heterojunctions have attracted considerable attention for efficiently utilizing solar energy and improving conversion efficiency during pollutant degradation. Herein, carbon nitride and hematite (α-Fe₂O₃) are used to prepare a Z-scheme 2D/2D α-Fe₂O₃/g-C₃N₄ heterojunction using an impregnation-hydrothermal method. The unique 2D/2D structure has a high interfacial area and widely-dispersed active sites. The energy band structure of the Z-scheme heterojunction leads to broad visible-light absorption and promotes charge transfer. Optimizing the content of the α-Fe₂O₃ precursor in composite leads to a maximum efficiency of 60.8% for the removal of 600 ppb of NO, which is approximately 1.78 times that of g-C₃N₄ (34.2%). The photocatalytic performance is greatly promoted because of the formation of the heterojunction and the strong interfacial action between g-C₃N₄ nanosheets and α-Fe₂O₃ nanoplates. Cycling experiments verify that the α-Fe₂O₃/g-C₃N₄ heterojunction has good stability and reusability. The α-Fe₂O₃/g-C₃N₄ heterojunction therefore has great potential in sustainable and efficient pollutant degradation.

异质结在有效利用太阳能和提高污染物降解过程中的转换效率方面引起了极大的关注。这里，氮化碳和赤铁矿（α-的Fe ₂ ö ₃）用于制备Z-方案2D / 2D的α-Fe ₂ ö ₃ / GC ₃ Ñ ₄使用浸渗水热法异质结。独特的2D / 2D结构具有高界面面积和广泛分散的活性位点。Z方案异质结的能带结构导致广泛的可见光吸收并促进电荷转移。优化的内容的α-Fe ₂ ö ₃复合材料中的前驱体去除600 ppb NO的最大效率为60.8％，约为gC ₃ N ₄（34.2％）的1.78倍。因为异质结的形成和GC之间的强界面作用的光催化性能得到极大地促进了₃ Ñ _4个纳米片和的α-Fe _2个ö ₃纳米片。循环实验验证的α-Fe ₂ ö ₃ / GC ₃ Ñ ₄异质结具有良好的稳定性和可重用性。所述的α-Fe ₂ ö ₃ / GC ₃ Ñ ₄ 因此，异质结在可持续和有效的污染物降解方面具有巨大潜力。