Jiansheng Chen , Lina Wang , Komal Gola , Xinyi Zhang , Yue Guo , Jinhua Sun , Pan Jia , Jinming Zhou
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引用次数: 0
摘要
生物激发的光驱动离子传输在太阳能收集中显示出巨大的潜力。为了达到与生物对应物相当的效率,有机选择性和光响应性的有效协同调节至关重要。在此,空位工程已被证明是一种有效的策略,可以通过增强表面负电荷和缩小带隙来显著提高氧化钨(WO3-x)纳米流体膜中光驱动离子传输的效率。光驱动离子输运的增强可归因于由于光生载流子的有效分离而导致的表面电荷的有效再分配。在最佳空位浓度下,WO2.66膜(WO2.66M)在10-4 M KCl电解液中产生的离子光电流为0.8 μA cm-2,是原WO2.85膜(WO2.85M)的4倍。在这种策略下,WO3-x纳米流体膜系统成功地实现了上坡离子传输和光增强渗透能转换。本研究表明,原子空位工程是提高纳米流体的光驱动离子输运动力学的有效途径,为光驱动离子输运在能量收集和离子分离方面的潜在应用提供了有效的策略。
Vacancy engineering in tungsten oxide nanofluidic membranes for high-efficiency light-driven ion transport
Bioinspired light-driven ion transport has shown great potential in solar energy harvesting. To achieve efficiencies comparable to biological counterparts, effective coregulation of permselectivity and photoresponsivity is crucial. Herein, vacancy engineering has been proven to be a powerful strategy for considerably increasing the efficiency of light-driven ion transport in tungsten oxide (WO3−x) nanofluidic membranes by enhancing the negative surface charges and narrowing bandgaps. The enhancement in light-driven ion transport can be attributed to the efficient redistribution of surface charges due to the effective separation of photogenerated carriers. At an optimized vacancy concentration, WO2.66 membrane (WO2.66M) delivers an ionic photocurrent of 0.8 μA cm−2 in a 10−4 M KCl electrolyte, which is four times higher than that generated by the original WO2.85 membrane (WO2.85M). Following this strategy, uphill ion transport and photoenhanced osmotic energy conversion are successfully achieved in the WO3−x nanofluidic membrane system. This study shows that atomic vacancy engineering is an efficient approach to increase the light-driven ion transport dynamics of nanofluidics, providing an efficient strategy to enhance light-driven ion transport for potential applications in power harvesting and ion separation.
期刊介绍:
The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality.
Emphasis:
The journal emphasizes fundamental scientific innovation within the following categories:
A.Colloidal Materials and Nanomaterials
B.Soft Colloidal and Self-Assembly Systems
C.Adsorption, Catalysis, and Electrochemistry
D.Interfacial Processes, Capillarity, and Wetting
E.Biomaterials and Nanomedicine
F.Energy Conversion and Storage, and Environmental Technologies