A novel synthetic carbon and oxygen doped stalactite-like g-C3N4 for broad-spectrum-driven indometacin degradation
A novel synthetic carbon and oxygen doped stalactite-like g-C3N4 for broad-spectrum-driven indometacin degradation
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一种新型合成碳和氧掺杂的钟乳石状 g-C3N4，用于广谱驱动的吲哚美辛降解
DOI：
10.1016/j.jhazmat.2019.121961
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发表时间：
2020
影响因子：
13.6
通讯作者：
Liu Guoguang
中科院分区：
文献类型：
--
作者：
Zheng Xiaoshan;Zhang Qianxin;Chen Tiansheng;Wu Yuliang;Hao Jun;Tan Cuiwen;Chen Ping;Wang Fengliang;Liu Haijin;Lv Wenying;Liu Guoguang
实现高效的太阳能利用是 PPCP 光催化降解领域的首要目标。在本研究中，通过双氰胺和氢碘酸甲胺（CH5N·HI）的简单共热解合成了广谱碳和氧掺杂的多孔g-C3N4（COCN）。 0.3COCN 对吲哚美辛 (IDM) 具有出色的光催化降解作用，比块状 g-C3N4 高 5.9 倍。光催化活性的增强可归因于太阳光的广谱利用和电荷分离效率的提高。活性物质(RSs)清除实验表明O2·−和1O2是主要的活性物质。此外，0.3COCN表现出优异的羟基自由基产率，这通过电子自旋共振（ESR）光谱证实。同时，根据HRAM LC-MS/MS和总有机碳（TOC）提出了IDM的降解途径。这项研究为广谱光催化剂提供了一种新策略，也为环境修复提供了一种有前途的策略。
Achieving efficient solar utilization is a primary goal in the field of photocatalytic degradation of PPCPs. For this study, a broad-spectrum carbon and oxygen doped, porous g-C3N4(COCN) was synthesized via a simple co-pyrolysis of dicyandiamide and methylamine hydroiodide (CH5N·HI). The 0.3COCN demonstrated an excellent photocatalytic degradation of indometacin (IDM), which was 5.9 times higher than bulk g-C3N4. The enhanced photocatalytic activity could be ascribed to the broad-spectrum utilization of solar light and improved charge separation efficiency. Reactive species (RSs) scavenging experiments have shown that O2·−and1O2were the dominant active species. Further, the 0.3COCN exhibits excellent yield of hydroxyl radicals which was confirmed by electron spin resonance (ESR) spectra. Meanwhile, the degradation pathways of IDM were proposed according the HRAM LC–MS/MS and total organic carbon (TOC). This research provided a new strategy for a broad-spectrum photocatalyst, and a promising strategy for environmental remediation.