Few-layer g-C₃N₄ nanosheets (CN-E) were synthesized by flash freezing the bulk g-C₃N₄ together with thermo-exfoliation with different time (2–20 min) by microwave assistant, to reduce the thickness of g-C₃N₄. Then, BiOI nanoflowers were grown in situ on CN-E by microwave-aided synthesis, forming BiOI/CN-E nanocomposites. The BiOI/CN-E showed a best activity of 27% improved Cr(VI) removal efficiency compared with the un-exfoliated BiOI/g-C₃N₄. The exfoliating CN-E coated on BiOI formed a heterojunction more efficiency than the two overlaid structure of g-C₃N₄ and BiOI, thus further improved the specific surface area and the catalytic performance during the treatment for pollutant Cr(VI).

通过快速冷冻大量的gC ₃ N ₄并用微波辅助剂在不同时间（2-20分钟）进行热剥落，以减少gC ₃ N的厚度，从而合成了几层gC ₃ N ₄纳米片（CN-E）。₄。然后，通过微波辅助合成在CN-E上原位生长BiOI纳米花，形成BiOI / CN-E纳米复合材料。与未剥落的BiOI / gC ₃ N ₄相比，BiOI / CN-E的最佳活性为Cr（VI）去除率提高了27％。涂覆在BiOI上的剥落CN-E形成比gC ₃ N ₄的两个重叠结构更有效的异质结 和BiOI，从而进一步提高了Cr（VI）污染物处理过程中的比表面积和催化性能。