Green synthesis of graphitic carbon nitride nanodots using sodium chloride template

Green synthesis of graphitic carbon nitride nanodots using sodium chloride template
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氯化钠模板绿色合成石墨氮化碳纳米点

DOI:
10.1007/s11051-016-3415-0
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发表时间:
2016-04
影响因子:
2.5
通讯作者:
Chu Zengyong
Chu Zengyong
中科院分区:
材料科学4区
文献类型:
--
作者:
Yuan Bo;Zou Xianshuai;Yan Tingnan;Fei Junjie;Chu Zengyong

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摘要石墨碳氮化物(g-C3 N4)纳米点是通过将双氰胺(DCDA)限制在NaCl模板中进行热处理而简单地制备的。由于NaCl的催化作用,氰基被引入到纳米点中。NaCl在较低温度下有利于DCDA的聚合,但在550 °C以上会促进DCDA的分解。在600 °C下热处理30 min是可规模化合成平均直径约为9 nm的g-C3 N4纳米点的最佳条件。g-C3 N4纳米点具有3.1eV的较高带隙,由于直径减小、氰基的引入以及一些钠离子的掺入,其可以发射明亮的蓝光。残留的钠离子和氰基可能导致石墨晶体的局部畸变,或作为复合中心增强光致发光。图形摘要
AbstractGraphitic carbon nitride (g-C3N4) nanodots are simply prepared by a thermal treatment of dicyandiamide (DCDA) confined within NaCl templates. Cyano groups are introduced to the nanodots due to the catalytic effect of NaCl. NaCl could facilitate the polymerization of DCDA at lower temperatures, but will promote the decomposition when the temperature is above 550 °C. Thermal treatment at 600 °C for 30 min is the optimal condition for the scalable synthesis of g-C3N4nanodots with an average diameter of ~9 nm. g-C3N4nanodots have a higher band gap of 3.1 eV, which can emit bright blue light due to the decreased diameter, the introduction of cyano groups, and the incorporation of some sodium ions. The residue sodium ions and the cyano groups might lead to the local distortion of the graphitic crystals, or act as recombination centers for the enhanced photoluminescence.Graphical Abstract
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