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首页> 外文期刊>Catalysis science & technology >Microfluidic artificial photosynthetic system for continuous NADH regeneration and -glutamate synthesis
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Microfluidic artificial photosynthetic system for continuous NADH regeneration and -glutamate synthesis

机译：连续NADH再生和 - 谷氨酸合成的微流体人工光合系统

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Artificial photosynthesis (APS) is an effective way to convert solar energy into chemical energy by simulating the natural photosynthesis system. Currently, APS plays an important role in the regeneration of coenzymes and synthesis of organic matter. Nevertheless, the photocatalytic materials and oxidoreductases used in most bulk reactors are simply distributed in the reaction solution, which results in problems such as poor stability, high price and they cannot be reused. Moreover, the photocatalytic system also has a certain influence on the catalytic activity of oxidoreductase. In this work, we report an efficient and stable microfluidic artificial photosynthetic system for reduced nicotinamide adenine dinucleotide (NADH) regeneration and l-glutamate synthesis under visible light. We fabricate glass capillary and polydimethylsiloxane (PDMS) microfluidic reactors, followed by immobilization of few-layer g-C3N4 and glutamate dehydrogenase in light and dark reactions zones, respectively. The system possesses advantages over the traditional method in terms of its high efficiency, low cost, and sustainability. The experimental results show that the NADH regeneration rate of the system reached 56.03%, the maximum production rate of l-glutamate was 98.3%, and the reaction conversion rate of immobilized glutamate dehydrogenase still reaches 53.2% after ten times of reuse. All these results prove that our system is applicable for synthesizing high value-added compounds by simulating the natural photosynthesis system, which may be a new feasible scheme to alleviate the energy and food crisis.
机译：人工光合作用（APS）是通过模拟自然光合作用系统将太阳能转化为化学能的有效方法。目前，APS在辅酶的再生和有机物的合成中起重要作用。然而，大多数散装反应器中使用的光催化材料和氧化还原酶仅在反应溶液中分布，这会导致诸如稳定性较差，高价和无法重复使用等问题。此外，光催化系统还对氧化还原酶的催化活性有一定的影响。在这项工作中，我们报告了一种有效且稳定的微流体人工光合系统，用于降低烟酰胺腺苷二核苷酸（NADH）再生和L-谷氨酸合成。我们制造玻璃毛细管和聚二甲基硅氧烷（PDMS）微流体反应器，然后分别固定在光和黑暗反应区域中，将少量的G-C3N4和谷氨酸脱氢酶固定。就其高效率，低成本和可持续性而言，该系统比传统方法具有优势。实验结果表明，系统的NADH再生速率达到56.03％，L-谷氨酸的最大产量为98.3％，并且在重复使用十倍后，固定化谷氨酸脱氢酶的固定化谷氨酸脱氢酶的反应转化率仍然达到53.2％。所有这些结果证明，我们的系统适用于通过模拟自然光合作用系统来合成高增值化合物，这可能是缓解能源和食品危机的新可行方案。

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