Department of Environment and Energy, Sejong University, 209 Neungdong-Ro, Gwangjin-Gu, Seoul, 05006, South Korea.
Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong.
Environ Geochem Health. 2019 Aug;41(4):1729-1737. doi: 10.1007/s10653-017-9966-x. Epub 2017 Apr 28.
Nitrogen-doped copper-biochar (N-Cu-biochar) was synthesized via pyrolysis of glucose in the presence of copper and melamine and used as a catalyst in the reduction of p-nitrophenol by NaBH. N-Cu-biochar was characterized by field emission scanning electron microscopy/energy-dispersive spectroscopy, Raman spectroscopy, X-ray Diffraction, and Brunauer-Emmett-Teller surface analyzer. The catalytic performance of N-Cu-biochar was evaluated under varying conditions of NaBH concentration, biochar dosage, and initial p-nitrophenol concentration. N-Cu-biochar was composed of ~83% C, ~9% O, and ~8% Cu, with Cu/CuO phases evenly dispersed on graphitic carbon aggregates possessing both macro- and meso-pores. N-Cu-biochar showed superior catalytic ability in mediating p-nitrophenol reduction as compared to Cu-biochar and N-doped biochar, achieving complete reduction of 0.35 mM p-nitrophenol within 30 min at a dose of 0.25 g L. Reduction of p-nitrophenol catalyzed by N-Cu-biochar followed pseudo-first-order kinetics, and the reaction rate was dependent upon NaBH concentration. The overall results indicate that biochar can be a suitable candidate as a support for catalyst synthesis, and N-doped Cu-biochar can be a promising catalyst for the reduction of p-nitrophenol.
氮掺杂铜生物炭（N-Cu-生物炭）是通过在铜和三聚氰胺存在下热解葡萄糖合成的，并用作 NaBH 还原对硝基苯酚的催化剂。通过场发射扫描电子显微镜/能量色散光谱、拉曼光谱、X 射线衍射和 Brunauer-Emmett-Teller 表面分析仪对 N-Cu-生物炭进行了表征。在不同的 NaBH 浓度、生物炭剂量和初始对硝基苯酚浓度条件下，评价了 N-Cu-生物炭的催化性能。N-Cu-生物炭由83%的 C、9%的 O 和~8%的 Cu 组成，Cu/CuO 相均匀分散在具有大孔和中孔的石墨碳聚集体上。与 Cu-生物炭和 N 掺杂生物炭相比，N-Cu-生物炭在介导对硝基苯酚还原方面表现出优异的催化能力，在 0.25 g·L 的剂量下，在 30 min 内可完全还原 0.35 mM 的对硝基苯酚。N-Cu-生物炭催化的对硝基苯酚还原遵循准一级动力学，反应速率取决于 NaBH 浓度。总体结果表明，生物炭可以作为催化剂合成的合适载体，而 N 掺杂 Cu 生物炭可以作为还原对硝基苯酚的有前途的催化剂。
