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Research Article

Highly crystalline core dominated the catalytic performance of carbon dot for cyclohexane to adipic acid reaction

Xiao Wang1, Wenyi Bian1, Tianyang Zhang1, Yajie Zhao1, Mingwang Shao1, Haiping Lin3, Yang Liu1( ), Hui Huang1( ), Zhenhui Kang1,2
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China
Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa 999078, Macao, China
School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China
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Graphical Abstract

Highly crystalline core of carbon dots dominated the efficient catalytic performance for cyclohexane to adipic acid.

Abstract

Carbon dots (CDs) have uniquely structural, physicochemical and photochemical properties, suggesting a promising platform for catalysis applications. The in-depth understanding of the structure-activity relationship in the CDs-based catalyst system needs to know the effect of the crystalline core on their catalytic performance. The efficient catalytic oxidation of cyclohexane is an urgent challenge in current chemical industry, in which, adipic acid (AA) plays an important role in industry for synthesis of nylon-6 and nylon-66. Here, we fabricated the pristine CDs by electrochemical etching graphite rod method and derived CDs with high crystalline core (CD-600, CD-800, and CD-1100) through a thermal treatment method in tube furnace. Furthermore, these CDs performed an outstanding catalytic performance for one-step synthesis of AA from cyclohexane. With the help of machine learning (ML), the deep correlations between features (structures of CDs, catalytic conditions) and catalytic performances were investigated by XGBoost (XGB) model. Then under the optimization and prediction of XGB, it was found that high crystalline core preceded the other features and CD-1100 could get the best conversion of 30.696% and selectivity to AA of 92.52% at reaction conditions of 130 °C, 1.5 MPa, and 10 h. This work pioneered the application of ML in industrial issues and demonstrated a comprehensive understanding on CDs as catalyst to realize one-step synthesis of AA.

Keywords

adipic acidcarbon dotsmachine learningcatalytic performancescrystalline core

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Nano Research
Volume 15 Issue 8,
August 2022
Pages 7662-7669
DOI: 10.1007/s12274-022-4393-4
Cite this article:
Wang X, Bian W, Zhang T, et al. Highly crystalline core dominated the catalytic performance of carbon dot for cyclohexane to adipic acid reaction. Nano Research, 2022, 15(8): 7662-7669. https://doi.org/10.1007/s12274-022-4393-4
Topics:
Semiconductor quantum dots

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Received: 29 January 2022
Revised: 22 March 2022
Accepted: 05 April 2022
Published: 10 June 2022
© Tsinghua University Press 2022
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