In this paper, lithium hexaoxotungstate (Li₆WO₆) nanowires were synthesized via facile solid-state reaction and were tested for CO₂ capture applications at both low (<100 °C) and high temperatures (>700 °C). Under dry conditions, the nanowire materials were able to capture CO₂ with a weight increment of 12% in only 60 s at an operating temperature of 710 °C. By contrast, under humidified ambience, Li₆WO₆ nanowires capture CO₂ with weight increment of 7.6% at temperatures as low as 30–40 °C within a time-scale of 1 min. It was observed that the CO₂ chemisorption in Li₆WO₆ is favored in the oxygen ambience at higher temperatures and in the presence of water vapor at lower temperatures. Nanowire morphology favors the swift lithium supply to the surface of lithium-rich Li₆WO₆, thereby enhancing the reaction kinetics and lowering time scales for high capacity adsorption. Overall, high chemisorption capacities, superfast reaction kinetics, wide range of operating temperatures, and reasonably good recyclability make 1-D Li₆WO₆ materials highly suitable for various CO₂ capture applications.

中文翻译：

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Li ₆ WO ₆纳米线对CO ₂的低温快速吸附动力学

在本文中，通过简便的固相反应合成了_六氧钨酸锂（Li ₆ WO ₆）纳米线，并在低温（<100°C）和高温（> 700°C）下测试了CO ₂捕集的应用。在干燥条件下，纳米线材料能够在710°C的工作温度下仅60 s内以12％的重量增量捕获CO ₂。相比之下，在潮湿的环境下，Li ₆ WO ₆纳米线在1分钟的时间范围内，在低至30–40°C的温度下以7.6％的重量增加捕获了CO ₂。观察到Li ₆ WO ₆中的CO ₂化学吸附在较高的温度和较低的温度下存在水蒸气的情况下，在氧气环境中是有利的。纳米线形态有利于迅速向富锂的Li ₆ WO ₆表面供应锂，从而提高了反应动力学并降低了高容量吸附的时间尺度。总的来说，高化学吸附能力，超快反应动力学，宽工作温度范围以及合理的可回收性使1-D Li ₆ WO ₆材料非常适合各种CO ₂捕集应用。