Solar-driven carbon dioxide fixation using photosynthetic semiconductor bio-hybrids
Solar-driven carbon dioxide fixation using photosynthetic semiconductor bio-hybrids
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DOI：
10.1039/c8fd00187a
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发表时间：
2019-07-01
影响因子：
3.4
通讯作者：
Yang, Peidong
中科院分区：
文献类型：
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作者：
Cestellos-Blanco, Stefano;Zhang, Hao;Yang, Peidong
利用太阳能将二氧化碳转化为增值碳产品是正在进行的研究工作的一个雄心勃勃的目标。然而，高过电势、低选择性和差的CO2传质困扰着纯无机电催化剂。在这种情况下，我们可以考虑一类已经进化来实现二氧化碳固定的生物有机体。我们可以利用并将这些整个生物体的简化二氧化碳固定途径与半导体纳米材料收集太阳能的特殊能力相结合。首创了一种新型纳米材料-生物界面，其中捕获光的硫化镉纳米颗粒存在于个体生物体内，本质上通过太阳能为生物二氧化碳固定提供动力。为了进一步开发光敏生物平台，需要更具生物相容性的光敏剂和细胞保护策略以及阐明电荷转移机制。在这里，我们讨论了金纳米簇有效且生物相容性地光敏模型产乙酸的能力。此外，我们还展示了创新材料，包括二维金属有机框架片和藻酸盐水凝胶，以屏蔽光敏细胞。最后，我们深入研究了使用瞬态吸收光谱来了解电荷转移机制的原始工作。
Solar-driven conversion of carbon dioxide to value-added carbon products is an ambitious objective of ongoing research efforts. However, high overpotential, low selectivity and poor CO2 mass transfer plague purely inorganic electrocatalysts. In this instance, we can consider a class of biological organisms that have evolved to achieve CO2 fixation. We can harness and combine the streamlined CO2 fixation pathways of these whole organisms with the exceptional ability of semiconducting nanomaterials to harvest solar energy. A novel nanomaterial-biological interface has been pioneered in which light-capturing cadmium sulfide nanoparticles reside within individual organisms essentially powering biological CO2 fixation by solar energy. In order to further develop the photosensitized organism platform, more biocompatible photosensitizers and cytoprotective strategies are required as well as elucidation of charge transfer mechanisms. Here, we discuss the ability of gold nanoclusters to photosensitize a model acetogen effectively and biocompatibly. Additionally, we present innovative materials including two-dimensional metal organic framework sheets and alginate hydrogels to shield photosensitized cells. Finally, we delve into original work using transient absorption spectroscopy to inform on charge transfer mechanisms.