Sanjini N S, Winston B, Velmathi S
J Nanosci Nanotechnol. 2017 Jan;17(1):495-501. doi: 10.1166/jnn.2017.11785.
Copper oxide nanoparticles have been successfully synthesized by microwave assisted precipitation method. Different precursors like copper chloride, copper nitrate and copper sulphate were used for synthesis of CuO nanoparticles with different shape, size and catalytic activity. Sodium hydroxide acts as a capping agent and ethanol as solvent for the synthesis. The XRD study was conducted to confirm the single phase monoclinic structure of as-synthesized and annealed CuO nano particles. The morphology of the as-synthesized and annealed CuO samples was analyzed by high resolution field emission scanning electron microscope. Fourier transform infrared spectroscopy was done for all the synthesized CuO nanoparticles for functional group characterization. The wide band gap and photocatalytic activity were studied by UV-Visible spectroscopy. The photocatalytic degradation of Methylene blue (MB) and Rhodamine B (RhB) dyes in aqueous solution were investigated under UV light (254 nm). In all the cases annealed samples showed good catalytic activity compared to as-synthesized CuO nanoparticles. The CuO nanoparticles from CuCl2 precursor act as excellent photocatalyst for both MB and RhB compared to CuNO₃ and CuSO₄.
通过微波辅助沉淀法成功合成了氧化铜纳米颗粒。使用不同的前驱体，如氯化铜、硝酸铜和硫酸铜，来合成具有不同形状、尺寸和催化活性的氧化铜纳米颗粒。氢氧化钠作为封端剂，乙醇作为合成溶剂。进行X射线衍射研究以确认合成态和退火态氧化铜纳米颗粒的单相单斜结构。通过高分辨率场发射扫描电子显微镜分析合成态和退火态氧化铜样品的形态。对所有合成的氧化铜纳米颗粒进行傅里叶变换红外光谱分析以进行官能团表征。通过紫外可见光谱研究宽带隙和光催化活性。在紫外光（254nm）下研究了水溶液中亚甲基蓝（MB）和罗丹明B（RhB）染料的光催化降解。在所有情况下，与合成态氧化铜纳米颗粒相比，退火样品表现出良好的催化活性。与硝酸铜和硫酸铜相比，来自氯化铜前驱体的氧化铜纳米颗粒对MB和RhB均表现出优异的光催化活性。
