Preparation of nitrogen-doped Cu-biochar and its application into catalytic reduction of p-nitrophenol

被引:45
作者
Cho, Dong-Wan [1 ]
Kim, Sohyun [1 ]
Tsang, Yiu Fai [2 ]
Song, Hocheol [1 ]
机构
[1] Sejong Univ, Dept Environm & Energy, 209 Neungdong Ro, Seoul 05006, South Korea
[2] Educ Univ Hong Kong, Dept Sci & Environm Studies, Tai Po, Hong Kong, Peoples R China
关键词
Glucose; Biochar; Copper; p-nitrophenol; Borohydride; Catalytic reduction; CARBON NANOTUBES; COPPER NANOPARTICLES; ACTIVATED CARBON; AQUEOUS-SOLUTION; GRAPHENE; 4-NITROPHENOL; EFFICIENT; ADSORPTION; COMPOSITE; REMOVAL;
D O I
10.1007/s10653-017-9966-x
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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 NaBH4. 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 NaBH4 concentration, biochar dosage, and initial p-nitrophenol concentration. N-Cu-biochar was composed of similar to 83% C, similar to 9% O, and similar to 8% Cu, with Cu/Cu2O 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-1. Reduction of p-nitrophenol catalyzed by N-Cu-biochar followed pseudo-first-order kinetics, and the reaction rate was dependent upon NaBH4 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.
引用
收藏
页码:1729 / 1737
页数:9
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