An instant, biocompatible and biodegradable high-performance graphitic carbon nitride
An instant, biocompatible and biodegradable high-performance graphitic carbon nitride
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一种即时、生物相容且可生物降解的高性能石墨氮化碳
DOI：
10.1016/j.jcis.2019.12.021
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发表时间：
2020
影响因子：
9.9
通讯作者：
Cui Lifeng
中科院分区：
文献类型：
--
作者：
Kang Shifei;Fang Zirou;He Maofen;Chen Mengya;Gao Yuqiong;Sun Di;Liu Yanfei;Chen Menglin;Dong Mingdong;Liu Ping;Cui Lifeng
聚合物石墨碳氮化物（g-C3 N4）材料由于其在电子器件和光电子器件中令人印象深刻的应用而引起了越来越多的兴趣。然而，g-C3 N4材料的化学惰性和在大多数溶剂中的不溶性极大地限制了其进一步的应用。鉴于g-C3 N4纳米片在生物医学领域的良好前景，进一步发展g-C3 N4材料需要高溶解性和生物相容性。本研究以NH 4 HSO 4为关键助剂，设计了一种简单的一步热聚合法制备速溶介孔g-C3 N4纳米片。产物，特别是最佳的g-C3 N4 NSs-4，显示出令人印象深刻的溶解性，生物相容性和部分生物降解性。表面亲水基团（-NH 2和-OH）的富集可能有助于提高g-C3 N4纳米片的溶解性，而部分生物降解性可归因于g-C3 N4骨架中二硫键的存在。在该体系中，NH_4HSO_4助剂不仅作为O和S源，还作为鼓泡剂，使g-C_3 N_4a多孔结构具有较大的比表面积和较高的光生电子-空穴对分离效率.这些综合的积极因素也极大地促进了g-C3 N4纳米片的光催化活性。这种简便、经济、通用的制备方法可制备出具有上级可见光催化活性的介孔、速溶、生物相容的g-C3 N4，在环境、能源和生物医学领域具有广阔的应用前景。
Polymer graphitic carbon nitride (g-C3N4) materials have attracted growing interest owing to their impressive applicability in photocatalysis and optoelectronic devices. However, further applications of g-C3N4materials are greatly restricted by their chemical inertness and insolubility in most solvents. Regarding the rising prospect of g-C3N4nanosheets in the biomedical field, high solubility and biocompatibility are required for the further development of g-C3N4materials. In this study, a simple one-step thermal polymerization method was designed to prepare fast-soluble mesoporous g-C3N4nanosheets by using NH4HSO4as the critical adjuvant. The products, especially the optimal g-C3N4NSs-4, showed impressive solubility, biocompatibility and partial biodegradability. The enriched surface hydrophilic groups (–NH2and –OH) may contribute to improving the solubility of g-C3N4nanosheets, while the partial biodegradability can be ascribed to the presence of the disulfide bond in the g-C3N4framework. In this system, the NH4HSO4adjuvant acted not only as O and S sources, but also as a bubbling agent that endows the g-C3N4a porous structure with greatly enlarged specific surface area and high separation efficiency of photogenerated electron-hole pairs. These integrative positive factors also greatly contributed to the photocatalytic activity of the g-C3N4nanosheets. This facile, economic and general fabrication strategy for mesoporous, fast-soluble and biocompatible g-C3N4with superior visible-light photocatalytic activity is promising in environmental, energy and biomedical fields.