Tailoring the morphology of poly (triazine imide) by chemical equilibrium towards enhanced photocatalytic overall water splitting

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-10-28 DOI:10.1016/j.surfin.2024.105321

Jiawen Yu , Jun Zhang , Qin Wang, Wenjie Zhou, Mengdie Cai, Jia-qi Bai, Qin Cheng, Jingshuai Chen, Song Sun

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Abstract

Poly (triazine imide) generally obtained via ionothermal synthesis typically exhibits nanosheet or hexagonal prism aggregation. This study presents an innovative approach to modulate PTI morphology without the addition of structure-directing agents. By manipulating the volatilization rate of gaseous substances like ammonia, various PTI morphologies were achieved. The results indicate that adjusting chemical equilibrium conditions favors the formation of morphologies with higher surface energy, leading to increased specific surface area and morphological variations. Notably, these changes do not alter the crystal structure, elemental composition or band gap, but significantly impact the dynamics of photogenerated carriers. Additionally, this morphological transformation not only increase the surface active sites but also enhance the interfacial interaction between the cocatalyst and the PTI support. Among the morphologies, rod-like PTI exhibit superior photocatalytic performance, with hydrogen evolution and oxygen evolution of 506.8 μmol h^-1 g^-1 and of 234.0 μmol h^-1 g^-1, respectively, representing a 15.8-fold increase over the original sample. Furthermore, the manipulation of chemical equilibrium during polymerization offers new insights and potential for advancing crystalline carbon nitride-based photocatalyst.

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通过化学平衡调整聚（三嗪亚胺）的形态以增强光催化整体水分离能力

通过离子热合成法获得的聚三嗪酰亚胺通常呈纳米片状或六方棱柱状聚集。本研究提出了一种无需添加结构引导剂即可调节 PTI 形态的创新方法。通过操纵氨等气态物质的挥发率，实现了各种 PTI 形态。结果表明，调整化学平衡条件有利于形成表面能更高的形态，从而增加比表面积和形态变化。值得注意的是，这些变化不会改变晶体结构、元素组成或带隙，但会对光生载流子的动力学产生重大影响。此外，这种形态变化不仅增加了表面活性位点，还增强了催化剂与 PTI 支持物之间的界面相互作用。在这些形态中，棒状 PTI 表现出更优越的光催化性能，氢进化和氧进化分别达到 506.8 μmol h-1 g-1 和 234.0 μmol h-1 g-1，比原始样品提高了 15.8 倍。此外，在聚合过程中操纵化学平衡为推进基于氮化碳的结晶光催化剂的发展提供了新的见解和潜力。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.