Details

Autor(en) / Beteiligte

• Wang, Zhiyong
• Su, Rina
• Wang, Dan
• Shi, Jie
• Wang, Jie-Xin
• Pu, Yuan
• Chen, Jian-Feng

Titel

Sulfurized Graphene as Efficient Metal-Free Catalysts for Reduction of 4‑Nitrophenol to 4‑Aminophenol

Ist Teil von

• Industrial & engineering chemistry research, 2017-11, Vol.56 (46), p.13610-13617

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The development of metal-free catalysts for hydrogenation reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) has been of great increasing scientific and industrial importance. Herein, we reported the preparation of sulfurized graphene (SG) nanomaterials by a well-developed ball-milling method. The as-prepared SG nanomaterials were systematically characterized by scanning electron microscope, transmission electron microscope, Fourier transform infrared, and X-ray photoelectron spectroscopy. The SG exhibited flake-like morphology with average size of 100 nm, and the S doping (3.4 atom %) into the nanocarbon molecules results in asymmetry of electron density distribution, providing high catalytic performance for catalytic reduction of 4-NP to 4-AP by using NaBH4 as the reducer. The related catalytic mechanism and reaction path of the reduction were investigated. The effects of different initial 4-NP concentrations, initial reductant concentrations, catalyst dosages, and reaction temperatures were presented, which have not been reported so far. The thermodynamic parameters including activation enthalpy and entropy were determined.