Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, 410011, People's Republic of China, China.
College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, People's Republic of China, China.
Environ Sci Pollut Res Int. 2022 Aug;29(40):60953-60967. doi: 10.1007/s11356-022-20064-w. Epub 2022 Apr 18.
Gold (Au) nanoparticles supported on certain platforms display highly efficient activity on nitroaromatics reduction. In this study, steam-activated carbon black (SCB) was used as a platform to fabricate Au/SCB composites via a green and simple method for 4-nitrophenol (4-NP) reduction. The obtained Au/SCB composites exhibit efficient catalytic performance in reduction of 4-NP (rate constant k = 2.1925 min). The effects of SCB activated under different steam temperature, Au loading amount, pH, and reaction temperature and NaBH concentration were studied. The structural advantages of SCB as a platform were analyzed by various characterizations. Especially, the result of N adsorption-desorption method showed that steam activating process could bring higher surface area (from 185.9689 to 249.0053 m/g), larger pore volume (from 0.073268 to 0.165246 cm/g), and more micropore for SCB when compared with initial CB, demonstrating the suitable of SCB for Au NP anchoring, thus promoting the catalytic activity. This work contributes to the fabrication of other supported metal nanoparticle catalysts for preparing different functional nanocomposites for different applications.
负载在某些载体上的金（Au）纳米粒子在硝基芳烃还原方面表现出高效的活性。在这项研究中，我们使用蒸汽活化炭黑（SCB）作为平台，通过一种绿色简单的方法制备 Au/SCB 复合材料，用于 4-硝基苯酚（4-NP）的还原。所获得的 Au/SCB 复合材料在还原 4-NP 方面表现出高效的催化性能（速率常数 k=2.1925 min）。研究了 SCB 在不同蒸汽温度、Au 负载量、pH 值、反应温度和 NaBH4 浓度下的活化效果。通过各种表征分析了 SCB 作为载体的结构优势。特别是，氮气吸附-脱附法的结果表明，与初始 CB 相比，蒸汽活化过程可以为 SCB 带来更高的比表面积（从 185.9689 增加到 249.0053 m/g）、更大的孔体积（从 0.073268 增加到 0.165246 cm/g）和更多的微孔，这表明 SCB 适合 Au NP 的固定，从而提高了催化活性。这项工作有助于制备其他负载金属纳米粒子催化剂，用于制备不同应用的不同功能纳米复合材料。
