Solar vapor generator (SVG) is undoubtedly a sustainable water treatment technology and good candidate to resolve the water shortage. However, the non-degradable polymer based SVG will bring extra environmental risk when they are scrapped. Herein, we fabricate a degradable interfacial solar vapor generator (DISVG) using PBAT monolith with hierarchical porous morphology via in-situ polymerization of PDA and dip-coating of MXene. Contributed to the MXene and PDA's synergetic effects, the DISVG demonstrates promising solar absorbance (up to 97.07 %), superhydrophilicity, and high evaporation efficiency. Consequently, the DISVG exhibit a high evaporation rate of 1.87 kg m⁻² h⁻¹ with a solar steam efficiency of 86.19 % under 1 sun irradiation. The DISVG shows excellent salt and oil resistance because of its good hydrophilicity. Moreover, the DISVG possesses excellent purification capability that can reject above 99 % ions in seawater and dyes in sewage. This research demonstrates a sustainable strategy for the fabrication of DISVG with environmentally friendly, highly efficient and well reliable solar vapor generators for seawater desalination and sewage purification.

太阳能蒸汽发生器（SVG）无疑是一种可持续的水处理技术，也是解决水资源短缺的良好候选者。然而，基于不可降解聚合物的 SVG 在报废时会带来额外的环境风险。在此，我们使用具有分级多孔形态的 PBAT 整体材料，通过 PDA 的原位聚合和 MXene 的浸涂，制造了一种可降解的界面太阳能蒸汽发生器（DISVG）。由于 MXene 和 PDA 的协同效应，DISVG 表现出良好的太阳能吸收率（高达 97.07%）、超亲水性和高蒸发效率。^{因此，DISVG 表现出 1.87 kg m -2}  h ^-1的高蒸发率在 1 次太阳照射下，太阳能蒸汽效率为 86.19 %。DISVG 因其良好的亲水性而表现出优异的耐盐和耐油性。此外，DISVG具有出色的净化能力，可以去除海水中99%以上的离子和污水中的染料。这项研究展示了一种可持续的 DISVG 制造策略，该策略采用环保、高效和可靠的太阳能蒸汽发生器，用于海水淡化和污水净化。