Microwave-Assisted Confining Growth and Liquid Exfoliation of sp3-Hybrid Carbon Nitride Nano/Micro-Crystals

IF 13 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Energy & Environmental Materials Pub Date : 2024-06-24 DOI:10.1002/eem2.12772
Chenglong Shen, Qing Lou, Kaikai Liu, Guangsong Zheng, Runwei Song, Jinhao Zang, Xigui Yang, Xing Li, Lin Dong, Chongxin Shan
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Abstract

As one promising carbon-based material, sp3-hybrid carbon nitride has been predicted with various novel physicochemical properties. However, the synthesis of sp3-hybrid carbon nitride is still limited by the nanaoscale, low crystallinity, complex source, and expensive instruments. Herein, we have presented a facile approach to the sp3-hybrid carbon nitride nano/micro-crystals with microwave-assisted confining growth and liquid exfoliation. Actually, the carbon nitride nano/micro-crystals can spontaneously emerge and grow in the microwave-assisted polymerization of citric acid and urea, and the liquid exfoliation can break the bulk disorder polymer to retrieve the highly crystalline carbon nitride nano/micro-crystals. The obtained carbon nitride nano/micro-crystals present superior blue light absorption strength and surprising photoluminescence quantum yields of 57.96% in ethanol and 18.05% in solid state. The experimental characterizations and density functional theory calculations reveal that the interface-trapped localized exciton may contribute to the excellent intrinsic light emission capability of carbon nitride nano/micro-crystals and the interparticle staggered stacking will prevent the aggregation-caused-quenching partially. Finally, the carbon nitride nano/micro-crystals are demonstrated to be potentially useful as the phosphor medium in light-emitting-diode for interrupting blue light-induced eye damage. This work paves new light on the synthesis strategy of sp3-hybrid carbon nitride materials and thus may push forward the development of multiple carbon nitride research.

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微波辅助sp3-杂化氮化碳纳米/微晶的限制生长和液态剥离
作为一种前景广阔的碳基材料,sp3 杂化氮化碳具有各种新颖的物理化学特性。然而,sp3 杂化氮化碳的合成仍然受到纳尺度、低结晶度、来源复杂和仪器昂贵等因素的限制。在此,我们提出了一种利用微波辅助限制生长和液体剥离法合成sp3杂化氮化碳纳米/微晶的简便方法。实际上,氮化碳纳米/微晶可以在柠檬酸和尿素的微波辅助聚合过程中自发产生和生长,而液体剥离可以打破块状无序聚合物,从而获得高结晶度的氮化碳纳米/微晶。所获得的氮化碳纳米/微晶具有优异的蓝光吸收能力,在乙醇中的光量子产率为 57.96%,在固态下的光量子产率为 18.05%。实验表征和密度泛函理论计算表明,界面捕获的局域激子可能是氮化碳纳米/微晶具有优异本征光发射能力的原因,而粒子间的交错堆叠将部分防止聚集引起的淬灭。最后,氮化碳纳米/微晶被证明可作为发光二极管的荧光粉介质,用于阻断蓝光对眼睛的伤害。这项工作为sp3杂化氮化碳材料的合成策略提供了新的思路,从而可能推动多种氮化碳研究的发展。
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来源期刊
Energy & Environmental Materials
Energy & Environmental Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
17.60
自引率
6.00%
发文量
66
期刊介绍: Energy & Environmental Materials (EEM) is an international journal published by Zhengzhou University in collaboration with John Wiley & Sons, Inc. The journal aims to publish high quality research related to materials for energy harvesting, conversion, storage, and transport, as well as for creating a cleaner environment. EEM welcomes research work of significant general interest that has a high impact on society-relevant technological advances. The scope of the journal is intentionally broad, recognizing the complexity of issues and challenges related to energy and environmental materials. Therefore, interdisciplinary work across basic science and engineering disciplines is particularly encouraged. The areas covered by the journal include, but are not limited to, materials and composites for photovoltaics and photoelectrochemistry, bioprocessing, batteries, fuel cells, supercapacitors, clean air, and devices with multifunctionality. The readership of the journal includes chemical, physical, biological, materials, and environmental scientists and engineers from academia, industry, and policy-making.
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