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Hydrothermal oxidation method to synthesize nitrogen containing carbon dots from compost humic acid as selective Fe(III) sensor
Materials Research Express ( IF 2.3 ) Pub Date : 2020-09-16 , DOI: 10.1088/2053-1591/abb5f1
Yan Zhu 1 , Ying Bao 1 , Liping Wang 1 , Jingtao Bi 1 , Yong Liu 2 , Chuang Xie 1
Affiliation  

Residual sludge which is generated as a by-product during wastewater treatment needs efficient and environmentally friendly disposal. In this work, nitrogen containing carbon dots (N-CDs) was synthesized via one-step hydrothermal oxidation of humic acid for the first time, which was alkalinely extracted from the compost of sludge. The successful doping of the functional groups (hydroxyl, carboxyl and amino) on the surface of N-CDs were characterized by x-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR). The optical properties of the synthetic N-CDs were obtained from Ultraviolet-visible spectroscopy and Photoluminescence spectra. The N-CDs had an average diameter at 1.88 nm and exhibited a well-defined spherical shape. The aqueous solution of N-CDs with excitation-dependent properties showed a strong blue emission with 8.8% quantum yield (QY) under an excitation wavelength of 340 nm, which indicate the synthesized N-CDs a promising sensing...

中文翻译:

水热氧化法从腐殖酸中合成含氮碳点作为选择性Fe(III)传感器

废水处理过程中作为副产物产生的残留污泥需要高效且环保的处置。在这项工作中,首次通过腐殖酸的一步水热氧化法合成了含氮碳点(N-CDs),然后从污泥的堆肥中对其进行碱提取。通过X射线光电子能谱(XPS)和傅里叶变换红外光谱(FT-IR)表征了N-CD表面官能团(羟基,羧基和氨基)的成功掺杂。合成的N-CD的光学性质是从紫外可见光谱和光致发光光谱获得的。N-CD的平均直径为1.88 nm,并显示出明确的球形。
更新日期:2020-09-18
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