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A one-step process for preparing a phenyl-modified g-C3N4 green phosphor with a high quantum yield

机译：一步法制备高量子产率的苯基改性g-C 3 N 4 绿色荧光粉

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Herein a simple one-step process for preparing a g-C3N4-based green phosphor was presented, which just involved thermal polymerization of a single precursor, 2,4-diamino-6-phenyl-1,3,5-triazine, under an atmosphere of argon, to prepare phenyl-modified g-C3N4. The effects of the annealing temperature and time on the crystalline structure, chemical composition, morphology, optical absorption properties, and photoluminescence emission behavior of the obtained samples were investigated systematically. It was found that the phenyl-modified g-C3N4 prepared at 400 °C for 40 min exhibits strong green emission with a quantum yield of as high as 38.08%, comparable to those of the g-C3N4 nanoparticles and quantum dots obtained from the multi-step preparation and post-treatment processes. The emission spectrum of the phenyl-modified g-C3N4 sample can be fitted into four peaks centered at around 465, 490, 520 and 545 nm, suggesting that the phenyl-modified g-C3N4 phosphor possesses multi-fluorophores or luminescent species. The introduction of the phenyl groups leads to the decrease in band gap and thus the red shift in emission as compared with pristine g-C3N4. The simple preparation process along with high quantum yield make this phenyl-modified g-C3N4 green phosphor show great potential in practical applications.
机译：本文介绍了一种简单的一步法制备基于gC 3 N 4 的绿色荧光粉的方法，该方法只是涉及到单一前体2,4-二氨基-6-苯基-1,3,5-三嗪在氩气下的热聚合，以制备苯基改性的gC 3 N 4 。系统地研究了退火温度和时间对所得样品的晶体结构，化学组成，形貌，光吸收性质和光致发光行为的影响。结果表明，在400℃下制备40分钟的苯基修饰的gC 3 N 4 绿色发射，量子产率高达38.08％，与gC 3 N 4 的发射率相当从多步制备和后处理过程中获得的纳米颗粒和量子点。苯基修饰的gC 3 N 4 样品的发射光谱可以拟合为以大约为中心的四个峰465、490、520和545 nm，表明苯基修饰的gC 3 N 4 荧光粉具有多种-荧光团或发光物质。与原始gC 3 N 4 相比，引入苯基会导致带隙减小，从而导致发射红移。 sub> 。简单的制备过程以及高的量子产率使这种苯基修饰的gC 3 N 4 绿色荧光粉表现出了出色的性能。在实际应用中的潜力。

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