纳米多金属氧化物NiO⋅CeO2⋅ZnO的合成、表征、光致发光性能、光催化及抗菌活性
Synthesis, characterization, PL properties, photocatalytic and antibacterial activities of nano multi-metal oxide NiO⋅CeO2⋅ZnO.
作者信息
Subhan Md Abdus, Ahmed Tanzir, Uddin Nizam, Azad Abdul Kalam, Begum Kulsuma
机构信息
Department of Chemistry, Shah Jalal University of Science and Technology, Sylhet, Bangladesh.
Department of Chemistry, Shah Jalal University of Science and Technology, Sylhet, Bangladesh.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Feb 5;136 Pt B:824-31. doi: 10.1016/j.saa.2014.09.100. Epub 2014 Oct 13.
A novel multi-metal nanocomposite, NiO⋅CeO2⋅ZnO has been prepared by co-precipitation of their carbonates from aqueous solutions of the metal nitrates following calcination and annealing 5 h at 450°C and 10 h at 950°C. NiO⋅CeO2⋅ZnO has been characterized by XRD, SEM, EDS, IR and PL spectra. The crystallite size of the as-synthesized sample varies in the range of 14-23 nm and those of the annealed sample in the range of 17-50 nm. Emissions of NiO⋅CeO2⋅ZnO have been observed in UV (NBE emission) and visible region at different excitations. Excitation wavelength dependent PL behavior of NiO⋅CeO2⋅ZnO has been observed in acetone at room temperature. This PL property is in disagreement with Kasha's rule of excitation wavelength dependence of emission spectrum. Photocatalytic as well as anti-bacterial activities were studied.
一种新型多金属纳米复合材料NiO⋅CeO2⋅ZnO，通过从金属硝酸盐水溶液中共同沉淀其碳酸盐，然后在450°C下煅烧和退火5小时以及在950°C下煅烧和退火10小时制备而成。通过XRD、SEM、EDS、IR和PL光谱对NiO⋅CeO2⋅ZnO进行了表征。合成样品的微晶尺寸在14 - 23纳米范围内，退火样品的微晶尺寸在17 - 50纳米范围内。在不同激发条件下，观察到NiO⋅CeO2⋅ZnO在紫外（NBE发射）和可见光区域有发射。在室温下的丙酮中观察到了NiO⋅CeO2⋅ZnO激发波长依赖的PL行为。这种PL性质与卡沙发射光谱激发波长依赖性规则不一致。对其光催化和抗菌活性进行了研究。
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