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Journal of Nanoparticle Research
Published in: Journal of Nanoparticle Research 7/2018

01-07-2018 | Research Paper

The preparation and characterization of CaMg(CO3)2@Ag2CO3/Ag2S/NCQD nanocomposites and their photocatalytic performance in phenol degradation

Authors: Jian Tian, Zhen Liu, Debin Zeng, Changlin Yu, Xingqiang Liu, Kai Yang, Hong Liu

Published in: Journal of Nanoparticle Research | Issue 7/2018

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Abstract

Using CaMg(CO3)2 as hard template, CaMg(CO3)2@Ag2CO3 microspheres were first obtained via a fast cation exchange process. Then, CaMg(CO3)2@Ag2CO3/Ag2S was fabricated by further anion exchange. Finally, trace nitrogen-doped carbon quantum dots (NCQDs) were coupled into CaMg(CO3)2@Ag2CO3/Ag2S and obtained CaMg (CO3)2@Ag2CO3/Ag2S/NCQD nanocomposites (< 380 nm). Different characterization techniques, e.g., XRD, N2 physical adsorption, SEM, TEM, UV-vis, FT-IR, X-ray photoelectron spectroscopy, TPR, photoluminescence, and electrochemical impedance spectroscopy test, were applied to investigate the physicochemical property of the as-prepared samples. The photocatalytic properties were evaluated by phenol degradation under simulated sunlight illumination. The results demonstrated that with a very low content of Ag2CO3 (0.67 wt%) and Ag2S (1.72 wt%) and a trace of NCQDs (0.46 at.%), the CaMg(CO3)2@Ag2CO3/Ag2S/NCQD nanocomposites exhibited excellent activity and stability for phenol degradation. The reasons for the enhancement of photocatalytic activity and stability are due to that the coexistence of trace Ag2S and NCQDs can effectively improve the texture property of photocatalyst and effectively promote the separation of photogenerated electrons and holes, resulting in more radicals (h+ and·O2−) to destroy the phenol. This work provided a new method to develop low-cost Ag-based semiconductor photocatalysts for environmental remediation.
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Metadata
Title
The preparation and characterization of CaMg(CO3)2@Ag2CO3/Ag2S/NCQD nanocomposites and their photocatalytic performance in phenol degradation
Authors
Jian Tian
Zhen Liu
Debin Zeng
Changlin Yu
Xingqiang Liu
Kai Yang
Hong Liu
Publication date
01-07-2018
Publisher
Springer Netherlands
Published in
Journal of Nanoparticle Research / Issue 7/2018
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-018-4277-4

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