Rename README.md to A realistic scientific illustration of wastewater purification using Hydrogel-COF. On the left, show dark, polluted water containing visible plastic bottles and plastic bags. In the middle, highlight a Hydrogel-COF purification membrane layer. On the right, show clean, crystal-clear natural water flowing out, resembling safe drinking water. The scene should look realistic, with clear contrast between dirty polluted water and fresh clean water.

#7
README.md → A realistic scientific illustration of wastewater purification using Hydrogel-COF. On the left, show dark, polluted water containing visible plastic bottles and plastic bags. In the middle, highlight a Hydrogel-COF purification membrane layer. On the right, show clean, crystal-clear natural water flowing out, resembling safe drinking water. The scene should look realistic, with clear contrast between dirty polluted water and fresh clean water. RENAMED
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