Scalable synthesis of reusable Ag@NiO micro-nanosynergized composite for highly fast reduction of 4-nitrophenol

• Published in: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology Vol. 24; no. 12; p. 238
• Main Authors: Sun, Yanyan, Liao, Yunhong, Chen, Xiaogang, Wang, Yuanyuan, Dou, Yanyu, Song, Pingxin, Zhang, Yingjiu, Zhang, Peijuan
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.12.2022; Springer Nature B.V
• Subjects: Aminophenol; Catalysis; Catalysts; Catalytic activity; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion; Efficiency; Ethanol; Industrial applications; Inorganic Chemistry; Lasers; Materials Science; Metal oxides; Morphology; Nanocomposites; Nanomaterials; Nanoparticles; Nanotechnology; Nickel oxides; Nitrates; Nitrophenol; Optical Devices; Optics; p-Nitrophenol; Photonics; Physical Chemistry; Reaction kinetics; Reduction (metal working); Research Paper; Silver; Spectrum analysis; Synergistic effect; Three dimensional flow; Toxicity; Catalytic degradation; Metal/semiconductor nanocomposites; 4-nitrophenol; Catalysts; Ag@NiO; Reaction kinetic
• ISSN: 1388-0764; 1572-896X
• DOI: 10.1007/s11051-022-05615-z

  Metal/semiconductor composites are promising catalysts. In this work, the three-dimensional flowery Ag@NiO micro-nanocomposite catalyst for the highly fast reduction of 4-nitrophenol to 4-aminophenol was prepared by simple homogeneous precipitation method. Ag@NiO composites exhibit better catalytic performance than Ag and NiO in reducing 4-nitrophenol. The catalytic experiments showed that when the specific surface area of Ag@NiO was 20.61 m 2 /g, the complete conversion time of 4-nitrophenol to 4-aminophenol was the shortest, the reaction kinetic constant was 11.01 × 10 −3  s −1 , and the turnover frequency was 166.67 × 10 −5  mol·g −1 ·s −1 . The catalytic activity of Ag@NiO was not significantly reduced after five consecutive cycles. Furthermore, the synergistic effect of Ag and NiO of the Ag@NiO composites was investigated in this work. Ag@NiO micro-nanomaterials have the potential for industrial application with simple preparation method, high catalytic efficiency, and easy recycling.