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Open AccessArticle

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

Department of Chemical Engineering and Materials, Ocean College, Minjiang University, Fuzhou 350108, China
Institute of Energy, Jiangxi Academy of Sciences, Nanchang 330096, China
Faculty of Clothing and Design, Minjiang University, Fuzhou 350108, China
Authors to whom correspondence should be addressed.
Catalysts 2018, 8(5), 187;
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)
PDF [2750 KB, uploaded 2 May 2018]


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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