Lemecho Biruktait Ayele, Andoshe Dinsefa Mensur, Gultom Noto Susanto, Abdullah Hairus, Kuo Dong-Hau, Chen Xiaoyun, Desissa Temesgen D, Wondimageng Demeke Tesfaye, Wu Yi-Nan, Zelekew Osman Ahmed
Department of Materials Science and Engineering, Adama Science and Technology University, Adama 1888, Ethiopia.
Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
ACS Omega. 2024 Mar 13;9(12):13714-13727. doi: 10.1021/acsomega.3c08051. eCollection 2024 Mar 26.
Herein, Cellulose-templated ZnCuO/AgO nanocomposites were prepared using biological renewable cellulose extracted from water hyacinth (). Cellulose-templated Cu-doped ZnO catalysts with different amounts of Cu as the dopants (1, 2, 3, and 4%) were prepared and denoted CZ-1, CZ-2, CZ-3, and CZ-4, respectively, for simplicity. The prepared catalysts were tested for the degradation of methylene blue (MB), and 2% Cu-doped ZnO (CZ-2) showed the best catalytic performance (82%), while the pure ZnO, CZ-1, CZ-3, and CZ-4 catalysts exhibited MB dye degradation efficiencies of 54, 63, 65, and 60%, respectively. The best catalyst (CZ-2) was chosen to further improve the degradation efficiency. Different amounts of AgNO (10, 15, 30, and 45 mg) were used for the deposition of AgO on the surface of CZ-2 and denoted CZA-10, CZA-15, CZA-30, and CZA-45, respectively. Among the composite catalysts, CZA-15 showed remarkable degradation efficiency and degraded 94% of MB, while the CZA-10, CZA-30, and CZA-45 catalysts showed 90, 81, and 79% degradation efficiencies, respectively, under visible light within 100 min of irradiation. The enhanced catalytic performance could be due to the smaller particle size, the higher electron and hole separation and charge transfer efficiencies, and the lower agglomeration in the composite catalyst system. The results also demonstrated that the Cu-doped ZnO prepared with cellulose as a template, followed by the optimum amount of AgO deposition, could have promising applications in the degradation of organic pollutants.
在此，使用从水葫芦中提取的生物可再生纤维素制备了纤维素模板化的ZnCuO/AgO纳米复合材料。制备了不同Cu掺杂量（1%、2%、3%和4%）的纤维素模板化Cu掺杂ZnO催化剂，为简便起见，分别记为CZ-1、CZ-2、CZ-3和CZ-4。对制备的催化剂进行了亚甲基蓝（MB）降解测试，2% Cu掺杂的ZnO（CZ-2）表现出最佳催化性能（82%），而纯ZnO、CZ-1、CZ-3和CZ-4催化剂的MB染料降解效率分别为54%、63%、65%和60%。选择最佳催化剂（CZ-2）以进一步提高降解效率。使用不同量的AgNO₃（10、15、30和45 mg）在CZ-2表面沉积AgO，分别记为CZA-10、CZA-15、CZA-30和CZA-45。在复合催化剂中，CZA-15表现出显著的降解效率，在可见光照射100分钟内降解了94%的MB，而CZA-10、CZA-30和CZA-45催化剂的降解效率分别为90%、81%和79%。催化性能的提高可能归因于复合催化剂体系中较小的粒径、较高的电子和空穴分离及电荷转移效率以及较低的团聚。结果还表明，以纤维素为模板制备的Cu掺杂ZnO，再进行最佳量的AgO沉积，在有机污染物降解方面可能具有广阔的应用前景。
