Ni nanoparticles‐loaded ZnO nanowire as an efficient and stable catalyst for reduction of 4‐nitrophenol

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.

Ag NPs decorated on the magnetic rod-like hydroxyapatite/MIL-101(Fe) nanocomposite as an efficient catalyst for the reduction of some nitroaromatic compounds and as an effective antimicrobial agent

“…Comparison between the obtained results to the reduction of 4-NP in the presence of HAP/MIL-101(Fe)/Ag/Fe 3 O 4 catalyst and NaBH 4 with other reported catalysts is indicated in Table 1. 39–52 From Table 1, it can be seen that the reaction in the presence of the HAP/MIL-101(Fe)/Ag/Fe 3 O 4 catalyst required a shorter reaction time compared with most of the reported catalysts, which confirms the potential of the current catalyst for the reduction of 4-nitrophenol in aqueous solutions.…”

Fabrication of ZnO dual electron transport layer via atomic layer deposition for highly stable and efficient CsPbBr3 perovskite nanocrystals light-emitting diodes

“…As a wide band gap semiconductor material, ZnO is widely used in solar energy [37], catalysis [38,39], laser [40] and other research fields [41]. All-inorganic perovskite films modified by the ZnO with smooth surface and orientational order have been reported [37,40], which facilitates charge extraction and improve device efficiency.…”