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四川大学/南昌大学团队《自然·通讯》:3D打印核心-壳层微生物水凝胶:构建二元共生体系实现高效生物制氢

  • 2026-04-02 00:54:11
四川大学/南昌大学团队《自然·通讯》:3D打印核心-壳层微生物水凝胶:构建二元共生体系实现高效生物制氢
背景介绍
氢能作为一种清洁、高能量密度的可再生能源,被视为未来能源转型的关键。然而,传统制氢方法如化石燃料重整能耗高、碳排放量大,而电解水制氢目前仍面临能耗较高的挑战。生物制氢,尤其是微藻光合制氢,因其直接利用太阳能、环境友好而备受关注。然而,微藻产氢的核心酶——[FeFe]-氢化酶对氧气极为敏感,而光合作用同时产生的氧气会强烈抑制氢化酶活性。如何在微藻产氢过程中有效去除氧气、维持厌氧环境,是当前生物制氢领域亟待解决的关键问题。
研究思路
为解决这一难题,四川大学杜晓声教授、周加境研究员南昌大学刘进教授联合研究团队开发了一种具有核心-壳层结构的微生物共生水凝胶系统。该系统通过同轴3D打印技术,将产氢微藻莱茵衣藻封装于水凝胶核心,将耗氧细菌枯草芽孢杆菌封装于水凝胶壳层,构建了空间分隔的二元微生物共生网络。该水凝胶由海藻酸钠、卡拉胶和聚乙二醇二丙烯酸酯复合而成,具备良好的机械性能和生物相容性。核心-壳层结构不仅为两种微生物提供了各自优化的生长微环境,还通过壳层细菌的呼吸作用持续消耗氧气,为核心微藻营造局部厌氧条件,从而激活氢化酶、促进氢气高效生成。该系统可在无液体培养基条件下长期运行,显著提高氢气产率并降低水资源消耗。相关成果以Engineered microbial hydrogels with confined architecture and binary microbes for efficient hydrogen production发表在nature communications上。
图片解析
图1 展示了核心-壳层微生物水凝胶的3D打印构建策略与氢气生成机制。微藻位于核心、细菌位于壳层,壳层细菌通过呼吸作用消耗氧气,为核心微藻营造厌氧环境,激活氢化酶,实现高效产氢。
图2 展示了MSN系统的结构表征与微生物活性。荧光成像显示微藻与细菌分别定位于核心与壳层区域,且边界清晰。经过14天无液体培养,微藻叶绿素含量持续上升,细菌GFP荧光在初期增强后趋于稳定,表明两种微生物均保持良好的生长状态。
图3 系统评估了MSN的氢气生产能力。当莱茵衣藻与枯草芽孢杆菌比例为1:15时,氢气产量达到1763 ± 98 mL H₂ L⁻¹,是传统悬浮培养体系的78倍。核心-壳层结构显著优于均质混合体系,且MSN可在多次氮气吹扫循环中持续产氢8天。
图4 通过转录组学解析了MSN系统增强产氢的分子机制。与悬浮培养和均质体系相比,MSN系统中微藻光合作用相关基因(如psbO、psbP、psbQ)及氢化酶相关基因(HydA1、HydEF、HydG)显著上调,表明核心-壳层空间分隔结构优化了光能利用与电子传递效率,激活了氢化酶表达。
结论
本研究成功构建了一种基于3D打印的核心-壳层微生物共生水凝胶系统,实现了微藻与细菌的空间分隔与功能协同。壳层细菌通过呼吸作用持续消耗氧气,为核心微藻营造局部厌氧环境,显著提升氢化酶活性与氢气产率。该系统不仅氢气产量高达1763 mL H₂ L⁻¹,远超传统悬浮培养体系,还可在无液体条件下长期稳定运行,大幅降低水资源消耗。该研究为高效、可持续的生物制氢提供了全新平台,也为微生物-材料共生系统的设计开辟了新思路。

BioMed科技」关注生物医药×化学材料交叉前沿研究进展!交流、合作,请添加杨主编微信!

原文链接:
https://www.nature.com/articles/s41467-026-70988-x
来源:BioMed科技声明:仅代表作者个人观点,作者水平有限,如有不科学之处,请在下方留言指正!

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  1. CONNECT:[ UseTime:0.000692s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001358s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.008587s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000494s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001205s ]
  6. SELECT * FROM `set` [ RunTime:0.000963s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001388s ]
  8. SELECT * FROM `article` WHERE `id` = 488719 LIMIT 1 [ RunTime:0.001869s ]
  9. UPDATE `article` SET `lasttime` = 1775184872 WHERE `id` = 488719 [ RunTime:0.007505s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.014476s ]
  11. SELECT * FROM `article` WHERE `id` < 488719 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.007056s ]
  12. SELECT * FROM `article` WHERE `id` > 488719 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004527s ]
  13. SELECT * FROM `article` WHERE `id` < 488719 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007534s ]
  14. SELECT * FROM `article` WHERE `id` < 488719 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000797s ]
  15. SELECT * FROM `article` WHERE `id` < 488719 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.039394s ]
0.174204s