Mohamed Reda M, Ismail Adel A, Kadi Mohammad W, Alresheedi Ajayb S, Mkhalid Ibraheem A
Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia.
Advanced Materials Department, Central Metallurgical R&D Institute, CMRDI, P.O. Box 87, Helwan, Cairo 11421, Egypt.
ACS Omega. 2021 Feb 23;6(9):6438-6447. doi: 10.1021/acsomega.1c00135. eCollection 2021 Mar 9.
Herein, we report a simple incorporation of PtO NPs at diverse percentages (0.2-0.8 wt %) onto a highly crystalline and mesoporous ZnO matrix by the wet-impregnation approach for degradation of tetracycline (TC) upon visible light exposure. These well-dispersed and small-sized PtO NPs provide the mesoporous PtO-ZnO nanocomposites with outstanding photocatalytic performance for complete TC degradation. The optimized 0.6% PtO-ZnO photocatalyst exhibits excellent TC degradation, and its degradation efficiency reached ∼99% within 120 min. The photocatalytic performance of the 0.6% PtO-ZnO nanocomposite is 20 and 10 times higher than that of pristine ZnO and commercial P-25, respectively. The photodegradation rate of TC over the 0.6% PtO-ZnO nanocomposite is 34 and 12.5 times greater than that of pristine ZnO and commercial P-25, respectively. This is because of the large surface area, unique porous structure, synergistic effect, and broad visible light absorption of the PtO-ZnO nanocomposite. Moreover, mesoporous PtO-ZnO nanocomposites showed a high stability and recyclability over five iterations. This work demonstrates the remarkable role of combining PtO and ZnO photocatalysts in providing nanocomposites with significant potential for the preservation of human health through wastewater remediation.
在此，我们报告了通过湿浸渍法将不同百分比（0.2 - 0.8 wt%）的PtO纳米颗粒简单地掺入到高度结晶和介孔的ZnO基质中，用于在可见光照射下降解四环素（TC）。这些分散良好且尺寸小的PtO纳米颗粒为介孔PtO-ZnO纳米复合材料提供了出色的光催化性能，可实现TC的完全降解。优化后的0.6% PtO-ZnO光催化剂表现出优异的TC降解性能，其降解效率在120分钟内达到约99%。0.6% PtO-ZnO纳米复合材料的光催化性能分别比原始ZnO和商用P-25高20倍和10倍。TC在0.6% PtO-ZnO纳米复合材料上的光降解速率分别比原始ZnO和商用P-25高34倍和12.5倍。这是由于PtO-ZnO纳米复合材料具有大表面积、独特的多孔结构、协同效应以及宽可见光吸收。此外，介孔PtO-ZnO纳米复合材料在五次循环中表现出高稳定性和可回收性。这项工作证明了将PtO和ZnO光催化剂结合在为纳米复合材料提供通过废水修复保护人类健康的巨大潜力方面所起的显著作用。
