4.7 Article

Hexylresorcinol calix[4]arene-assisted synthesis of ZnO-Au micro-nano materials with enhanced photodegradation performance to degrade harmful organic compounds

Journal

INORGANIC CHEMISTRY FRONTIERS
Volume 8, Issue 22, Pages 4903-4913

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qi00968k

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Funding

  1. National Natural Science Foundation of China [21673201, 21801218]
  2. Jiangsu Key Laboratory for Bioresources of Saline Soils [JKLB2018007]

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In this study, HRCA-ZnO-Au micro-nano materials were synthesized using a simple atmospheric reflux method. The morphology of ZnO was effectively controlled and the specific surface area of the sample was increased through shape manipulation and surface exposure, leading to a significant enhancement in the photocatalytic activity of ZnO-Au.
In this study, hexylresorcinol calix[4]arene-ZnO-Au (HRCA-ZnO-Au) micro-nano materials are synthesized by a simple atmospheric reflux. AuCl4- ions are in situ reduced to Au by the phenolic hydroxyl groups of amphiphilic HRCA and deposited on the primarily formed ZnO sheets, which prevents Zn2+ ions in the solution from depositing at this position. Finally, the flake sample is obtained. HRCA and chloroauric acid effectively shape the morphology of ZnO from micron-sized flowers to nanometer sheets, and they significantly increase the specific surface area of the sample. Low temperature calcination of the HRCA-ZnO-Au composite micro-nano materials partially removes calixarene molecules and exposes the surface of ZnO-Au. Thus, the photocatalytic activity of ZnO-Au is significantly improved due to the synergistic effect between ZnO and Au.

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