In this work, lignin carbon-based membranes were prepared for H₂S adsorption. Alkali lignin was carbonized to obtain alkali lignocarbon (CLA). Using the CLA and polyvinyl alcohol (PVA) as raw materials, glycerol and water as plasticizers, and nano-CuO and Cu²⁺ as dopants, CLA/PVA, CuO-CLA/PVA-1, and Cu-CLA/PVA-2 composite membranes were prepared by solution casting method. The structures of these membranes and their H₂S adsorption properties were then analyzed. The results show that with a membrane solution water-alcohol ratio of 3:1 and 2 wt% CLA content, the prepared CLA/PVA membrane can adsorb H₂S for 30 min. The CuO-CLA/PVA-1 and Cu-CLA/PVA-2 membranes, which were obtained after doping with nano-CuO and Cu²⁺, demonstrate significantly improved deodorization performance compared with that of CLA/PVA. The Cu-CLA/PVA-2 membrane can adsorb H₂S for up to 75 min and also demonstrates better mechanical properties. The H₂S adsorption capacity of this membrane is up to 0.27 mol/kg. Structural analysis shows that the veneers of the three composite membranes are smooth and that doped copper is evenly distributed in the membranes as nano-CuO. The surface functional groups of the CLA/PVA, CuO-CLA/PVA-1, and Cu-CLA/PVA-2 membranes are similar and play a positive role in H₂S adsorption. Nano-CuO is the main active site for H₂S adsorption in the Cu-containing composite membranes.

在这项工作中，制备了用于吸附H ₂ S的木质素碳基膜。将碱木质素碳化得到碱木质素碳（CLA）。以CLA和聚乙烯醇（PVA）为原料，甘油和水为增塑剂，纳米CuO和Cu ²⁺为掺杂剂，CLA/PVA，CuO-CLA/PVA-1，Cu-CLA/PVA-2采用溶液流延法制备复合膜。然后分析这些膜的结构和它们的H ₂ S吸附特性。结果表明，在膜溶液水醇比为3:1、CLA含量为2 wt%时，制备的CLA/PVA膜可以吸附H ₂ S 30 min。CuO-CLA/PVA-1 和Cu-CLA/PVA-2 膜，是掺杂纳米CuO 和Cu ^{2+后得到的}, 与 CLA/PVA 相比，除臭性能显着提高。Cu-CLA/PVA-2 膜可以吸附 H ₂ S 长达 75 分钟，并且还表现出更好的机械性能。该膜的H ₂ S 吸附量高达0.27 mol/kg。结构分析表明，三种复合膜的单板光滑，掺杂铜以纳米CuO的形式均匀分布在膜中。_{CLA/PVA、CuO-CLA/PVA-1和Cu-CLA/PVA-2膜的表面官能团相似，对H 2} S吸附起积极作用。纳米CuO是含Cu复合膜中H _{2 S吸附的主要活性位点。}