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 H...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 Zn^(2+)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.展开更多
Bismuth oxychloride(BiOCl)and cerium dioxide(CeO_(2))composites were successfully synthesized via a facile one-step co-precipitation method.The BiOCl/CeO_(2)composites were observed to be sheet-like structures with so...Bismuth oxychloride(BiOCl)and cerium dioxide(CeO_(2))composites were successfully synthesized via a facile one-step co-precipitation method.The BiOCl/CeO_(2)composites were observed to be sheet-like structures with some CeO_(2)nanoparticles distributed on the surface.The BiOCl/CeO_(2)composites exhibited higher photodegradation performance(98.8%)of rhodamine B(RhB)than pure BiOCl(80.2%)and CeO_(2)(9.6%)under solar simulated irradiation.The BiOCl/CeO_(2)composites with a Bi/Ce molar ratio of 4:1 exhibited the highest photocatalytic performance for RhB,and an optimal RhB degradation efficiency of 98.8%was achieved under solar simulated irradiation for 60 min.The photocatalytic performance results were compared with other BiOCl composites.The photocatalytic mechanisms of BiOCl/CeO_(2)composites were discussed by radical trapping experiments and electron spin resonance(ESR),which indicated that h+and˙O_(2)−were the dominant radicals for RhB degradation.展开更多
基金the National Natural Science Foundation of China(no.21673201 and 21801218)Jiangsu Key Laboratory for Bioresources of Saline Soils(no.JKLB2018007).
文摘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 Zn^(2+)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.
文摘Bismuth oxychloride(BiOCl)and cerium dioxide(CeO_(2))composites were successfully synthesized via a facile one-step co-precipitation method.The BiOCl/CeO_(2)composites were observed to be sheet-like structures with some CeO_(2)nanoparticles distributed on the surface.The BiOCl/CeO_(2)composites exhibited higher photodegradation performance(98.8%)of rhodamine B(RhB)than pure BiOCl(80.2%)and CeO_(2)(9.6%)under solar simulated irradiation.The BiOCl/CeO_(2)composites with a Bi/Ce molar ratio of 4:1 exhibited the highest photocatalytic performance for RhB,and an optimal RhB degradation efficiency of 98.8%was achieved under solar simulated irradiation for 60 min.The photocatalytic performance results were compared with other BiOCl composites.The photocatalytic mechanisms of BiOCl/CeO_(2)composites were discussed by radical trapping experiments and electron spin resonance(ESR),which indicated that h+and˙O_(2)−were the dominant radicals for RhB degradation.
