Xia Yide, Liu Ying, Shi Nannan, Zhang Xungao
College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 Hubei China
RSC Adv. 2019 Apr 2;9(18):10272-10281. doi: 10.1039/c9ra00345b. eCollection 2019 Mar 28.
In this article, the catalyst Au/γ-FeO@hydroxyapatite (Au/γ-FeO@HAP) consisting of Au nanoparticles supported on the core-shell structure γ-FeO@HAP was prepared through a deposition-precipitation method. The catalyst was characterized by transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, N adsorption-desorption and atomic absorption spectrometry. The as-prepared Au/γ-FeO@HAP exhibited excellent performance for the reduction of 4-nitrophenolate (4-NP) to 4-aminophenolate (4-AP) in the presence of NaBH at room temperature. Thermodynamic and kinetic data on the reduction of 4-NP to 4-AP catalyzed by the as-prepared catalyst were studied. The as-prepared catalyst could be easily separated by a magnet and recycled 6 times with over 92% conversion of 4-NP to 4-AP. In addition, the as-prepared catalyst showed excellent catalytic performance on other nitrophenolates. The TOF value of this work on the reduction of 4-NP to 4-AP was 241.3 h. Au/γ-FeO@HAP might have a promising potential application on the production of 4-AP and its derivatives.
在本文中，通过沉积沉淀法制备了由负载在核壳结构γ-FeO@羟基磷灰石（γ-FeO@HAP）上的金纳米颗粒组成的催化剂Au/γ-FeO@羟基磷灰石（Au/γ-FeO@HAP）。采用透射电子显微镜、X射线粉末衍射、X射线光电子能谱、傅里叶变换红外光谱、N吸附-脱附和原子吸收光谱对该催化剂进行了表征。所制备的Au/γ-FeO@HAP在室温下，在硼氢化钠存在的情况下，对将4-硝基苯酚盐（4-NP）还原为4-氨基苯酚盐（4-AP）表现出优异的性能。研究了所制备的催化剂催化4-NP还原为4-AP的热力学和动力学数据。所制备的催化剂可以很容易地通过磁铁分离，并循环使用6次，4-NP转化为4-AP的转化率超过92%。此外，所制备的催化剂对其他硝基苯酚盐也表现出优异的催化性能。这项工作中4-NP还原为4-AP的TOF值为241.3 h-1。Au/γ-FeO@HAP在4-AP及其衍生物的生产中可能具有广阔的潜在应用前景。
