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Open AccessArticle

Intrinsic Catalytic Activity of Gold/Multi-Walled Carbon Nanotubes Composites in Squaric Acid-Iron(II/III) System

1
Department of Chemical Engineering and Materials, Ocean College, Minjiang University, Fuzhou 350108, China
2
Institute of Energy, Jiangxi Academy of Sciences, Nanchang 330096, China
3
Faculty of Clothing and Design, Minjiang University, Fuzhou 350108, China
*
Authors to whom correspondence should be addressed.
Catalysts 2018, 8(5), 187; https://doi.org/10.3390/catal8050187
Received: 20 March 2018 / Revised: 28 April 2018 / Accepted: 30 April 2018 / Published: 2 May 2018
(This article belongs to the Special Issue Hybrid Catalysis)
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Abstract

In this paper, gold/multi-walled carbon nanotube (Au/MWCNTs) composites were prepared via in situ reductions. The synthesized materials could effectively catalyze the system of square acid (SQA)-iron(II/III) to produce a significant color reaction. By designing the orthogonal test of three-factor and three-level, the three factors of sodium formate solution concentration, ultrasonic time and synthesis reaction time were optimized in the process of Au/MWCNTs preparation. Results showed that the Au/MWCNTs had the best catalytic activity under the conditions of sodium formate solution concentration of 400 mmol/L, ultrasonic for 30 min and reaction for 4 h. In a subsequent comparison with H2O2, it found that the catalytic performance of 1 mg of Au/MWCNTs composite was equivalent to that of H2O2 with the concentration of 0.28 mmol/L. It demonstrated that the prepared Au/MWCNTs composites had good catalytic activity, stable color and low background noise, indicating a good prospect in various fields including that of catalytic reaction, sensing analysis, and nanomaterials labeling. View Full-Text
Keywords: Au/MWCNTs composites; catalytic activity; square acid-iron(II/III) system Au/MWCNTs composites; catalytic activity; square acid-iron(II/III) system
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Li, Y.; Jiang, C.; Lin, S.; Lai, J.; Zheng, L.; Xu, P. Intrinsic Catalytic Activity of Gold/Multi-Walled Carbon Nanotubes Composites in Squaric Acid-Iron(II/III) System. Catalysts 2018, 8, 187.

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