Fabrication of P-Doped Porous Carbon Catalysts, with Inherent N Functionality, from Waste Peanut Shells and Their Application in the Metal-Free Aerobic Oxidation of Alcohols

催化作用 化学工程 磷酸 碳纤维 金属 生物炭 材料科学 生物量(生态学) 化学 热解 有机化学 复合材料 复合数 海洋学 地质学 工程类
作者
Yin Zhu,Xing Liu,Fengzhen Wu,Beili Lu,Biao Huang,Yandan Chen,Lin Guo
出处
期刊:ACS Sustainable Chemistry & Engineering [American Chemical Society]
卷期号:10 (2): 911-922 被引量:12
标识
DOI:10.1021/acssuschemeng.1c06692
摘要

Based on low-cost, N-containing biomass waste peanut shells and phosphoric acid, the P element was successfully introduced into the carbon skeleton to obtain P-doped porous carbon materials, with inherent N functionality. In comparison to carbon catalysts functionalized with just N or P (NC-800 or PC), the as-prepared P-doped, N-containing porous carbon materials (NPC-T) possessed superior catalytic activity toward the aerobic oxidation of benzyl alcohol (BA). According to these findings, a synergistic effect of N and P species on the catalytic efficiency of carbon materials was observed. The amounts of graphitic N and C3PO species on the surface of NPC-T were shown to be correlated with catalytic activity. In the case of NPC-800, 100% conversion and 99.7% selectivity could be achieved along with a high TOF value (2.49 × 10–3 mol·g–1·h–1). Even when applied to various alcohols, the NPC-800 still showed good catalytic activity. Based upon the mechanistic investigations, both radical and nonradical reaction pathways occurred during the aerobic oxidation of BA over the NPC-800. Furthermore, to facilitate catalyst recycling, the granular P-doped, N-containing carbon (granular NPC-800) was generated, utilizing a kneading heat treatment and extrusion molding technique that did not require the addition of any extra adhesive. This work highlighted the potential high-value utilization of biomass waste in constructing P-doped, N-containing carbon materials and the application as metal-free catalysts in the aerobic selective oxidation reactions.
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