Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 53, Issue 4, Pages 1437-1441Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ie403393u
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Funding
- National Natural Science Funds for Excellent Young Scholars [21222608]
- Program for New Century Excellent Talents in University [NCET-12-0392]
- Research Fund of the National Natural Science Foundation of China [21106099]
- Foundation for the Author of National Excellent Doctoral Dissertation of China [201251]
- Tianjin Natural Science Foundation [11JCYBJC01700]
- Programme of Introducing Talents of Discipline to Universities [B06006]
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In this study, phosphotungstic acid immobilized on amine-grafted graphene oxide (GOAP) was prepared successfully by silylanization and electrostatic interaction. The obtained GOAP was characterized by Raman spectroscopy, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM), zeta potential measurements, and X-ray photoelectron spectroscopy (XPS). Systematic studies demonstrated that GOAP had excellent catalytic activities and robustness in the one-pot tandem deacetalization-nitroaldol reaction. The key role of the acid/base ratio in the catalytic performance of this bifunctional catalyst was also revealed by preliminary kinetic studies. This bifunctional catalyst might find promising applications in green chemistry, as it can not only reduce costs and waste by saving separation/purification steps and solvents/reagents, but also increase the yield by avoiding the separation of intermediate products.
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