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Open AccessArticle

Facile Synthesis of Porous Hexapod [email protected] Dual Catalysts for In Situ SERS Monitoring of 4-Nitrothiophenol Reduction

1
Research Center for Analytical Instrumentation, Institute of Cyber-Systems and Control, State Key Laboratory of Industrial Control Technology, Zhejiang University, Hangzhou 310027, China
2
Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
3
College of Electronic Science & Engineering, Jilin University, 2699 Qianjin Road, Changchun 130012, China
*
Author to whom correspondence should be addressed.
Catalysts 2020, 10(7), 746; https://doi.org/10.3390/catal10070746
Received: 29 May 2020 / Revised: 2 July 2020 / Accepted: 3 July 2020 / Published: 5 July 2020
Controllable morphological metal catalytic materials have always been a focus in research. In the previous work, hexapod AgCl was successfully synthesized. In this paper, hexapod [email protected] microstructures with diverse Ag contents are prepared through NaBH4 reduction. They are characterized by scanning electron microscopy (SEM) and the element distribution is proved by an energy dispersive X-ray spectrometer (EDS). They are porous dendritic microstructures with a large specific surface area and a rough surface, which display high catalytic performance and surface-enhanced Raman spectroscopy (SERS) activity. Furthermore, the hexapod [email protected] microstructure is devoted as a dual catalyst to monitor the reduction of 4-nitrothiophenol (4-NTP) to 4-aminothiophenol (4-ATP) in situ using SERS. Ultraviolet–visible (UV–Vis) spectroscopy was employed to evaluate the catalytic performance of the hexapod [email protected] microstructures. The consequences show that the velocity of reaction became faster with a corresponding increase in silver content and the reaction mechanism was cleared. In addition to preparing a good catalyst, this work also promotes the combination of micro-nano materials and spectroscopy technology. View Full-Text
Keywords: [email protected] microstructure; in situ monitoring; surface-enhanced Raman spectroscopy; 4-nitrothiophenol reduction [email protected] microstructure; in situ monitoring; surface-enhanced Raman spectroscopy; 4-nitrothiophenol reduction
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MDPI and ACS Style

Lu, Y.; Mao, J.; Wang, Z.; Qin, Y.; Zhou, J. Facile Synthesis of Porous Hexapod [email protected] Dual Catalysts for In Situ SERS Monitoring of 4-Nitrothiophenol Reduction. Catalysts 2020, 10, 746.

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