Photocatalytic performance of metal poly(heptazine imide) for carbon dioxide reduction

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Aika Yamaguchi, Chihiro Miyazaki, Yunosuke Takezawa, Goichiro Seo, Yuki Saito, Ryosuke Ohnuki, Shinya Yoshioka, Kaname Kanai
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Abstract

Poly(heptazine imide) (PHI), a carbon nitride polymer, is a highly efficient visible-light-driven photocatalytic material. We aimed to improve its photocatalytic performance for CO2 conversion. We prepared M-PHIs by encapsulating different metals (M = K, Li, Rb, and Na) and H-PHIs, in which the metal of each M-PHI was ion-exchanged with a proton. We evaluated their photocatalytic activities for CO2 conversion and found that Na-PHI and H-PHI, prepared from Na-PHI (H-PHI(NaCl)), showed more than twice the CO production efficiency of melon and other PHIs.

The high CO production efficiency of Na-PHI and H-PHI(NaCl) was attributed to their extremely smaller particle size compared with those of the other PHIs. By closely examining the synthesis conditions of Na-PHI, we have identified a method to intentionally synthesize M-PHI with small particle size. These results provide a new strategy for highly efficient CO2 conversion using PHI.

Abstract Image

用于还原二氧化碳的金属聚(庚嗪亚胺)的光催化性能
聚(庚嗪亚胺)(PHI)是一种氮化碳聚合物,是一种高效的可见光光催化材料。我们的目标是提高其在二氧化碳转化方面的光催化性能。我们通过封装不同的金属(M = K、Li、Rb 和 Na)制备了 M-PHIs 和 H-PHIs,其中每种 M-PHI 的金属都与质子进行了离子交换。我们评估了它们转化二氧化碳的光催化活性,发现由 Na-PHI 制备的 Na-PHI 和 H-PHI(H-PHI(NaCl))的二氧化碳生成效率是甜瓜和其他 PHI 的两倍多。通过仔细研究 Na-PHI 的合成条件,我们找到了一种有意合成小粒径 M-PHI 的方法。这些结果为利用 PHI 高效转化二氧化碳提供了一种新策略。
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来源期刊
Carbon Trends
Carbon Trends Materials Science-Materials Science (miscellaneous)
CiteScore
4.60
自引率
0.00%
发文量
88
审稿时长
77 days
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