Ni nanoparticles‐loaded ZnO nanowire as an efficient and stable catalyst for reduction of 4‐nitrophenol. Issue 2 (10th January 2022)

• Record Type: Journal Article
• Authors: Lin, Chaoyu; Luo, Gan; Zhou, Huiqin; Feng, Anlin; Zeng, Li; Li, Qingyang
• Is Part Of: EcoMat. Volume 4:Issue 2(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-10
• Subjects: amorphous Ni -- catalytic reduction -- nano‐heterojunction -- ZnO nanowire array; Materials -- Environmental aspects -- Periodicals; Clean energy -- Periodicals; 621.042
• DOI: 10.1002/eom2.12164
• Languages: English
• ISSNs: 2567-3173

Abstract

Abstract: An amorphous Ni nanoparticles‐loaded ZnO nanowire array is controllably constructed on stainless steel mesh through combined electrodeposition and hydrothermal reaction. Its nano‐arrayed structure not only provides a platform to achieve stable and good dispersion of Ni nanoparticles, but also helps improve their ability to adsorb 4‐nitrophenolate ions and to capture hydrogen radicals, thereby accelerating the hydrogen transfer from metal hydride complex to 4‐nitrophenol. Benefiting from the abovementioned unique features, it outperforms most Ni‐based catalysts. While a 30‐s re‐electrodeposition of Ni can provide it extra 150 min of high catalytic activity towards the reduction of waste 4‐nitrophenol to valuable 4‐aminophenol, further demonstrating its outstanding reusability. The highly general methodology reported here paves the way to economically and effectively synthesize various other metal nanoparticles‐loaded ZnO nanowire arrays on different conductive substrates, which not only enrich the nanowire‐arrayed catalysts, but also significantly promote their practical utilizations in a wide range of environment‐related fields. Abstract : The synthetic process of Ni‐ZnO NWA@SSM is flexible, cost‐efficient, and suitable for large‐scale production, showing a great industrialization potential for practical applications in 4‐NP removal from wastewater. The general methodology reported here paves the way to effectively synthesize various other ZnO NWA‐supported catalysts, and promotes their practical utilization in a wide range of environment‐related applications.