Kaur Harsimranjot, Bhatti Harbhajan Singh, Singh Karamjit
Department of Physics, Punjabi University Patiala-147002 Punjab India
RSC Adv. 2019 Nov 15;9(64):37450-37466. doi: 10.1039/c9ra03405f. eCollection 2019 Nov 13.
Pure and Eu-doped (1, 3, 5, 7 & 10 mol%) SnO nanostructures have been successfully synthesized by a facile and simple hydrothermal method. The properties of as-synthesized samples have been investigated by various analytical techniques. It was found that the morphology of as-synthesized flower-like SnO nanostructures made of intermingled small-size agglomerated nanorods can be precisely controlled by varying the Eu dopant concentration in a reasonable range. Moreover, the photocatalytic activity of SnO studied by the degradation of rhodamine-B (RhB) dye in aqueous media shows excellent performance on 10 mol% europium doping, which may be attributed to its specific morphology and larger surface area as seen from BET measurements. Furthermore, sensors based on 10 mol% Eu-doped SnO nanostructures show the highest fluorescence quenching efficiency (0.23) as compared to pure SnO and other doped samples for the lowest concentration of Cd (10 ppb) in drinking water with a Limit of Detection (LOD) as low as 7 ppb; 0.007 μg mL. The formation mechanism of Eu-doped SnO nanostructures has been discussed in detail.
通过一种简便的水热法成功合成了纯的和铕掺杂（1%、3%、5%、7%和10%摩尔）的SnO纳米结构。采用各种分析技术对合成后的样品性能进行了研究。结果发现，通过在合理范围内改变铕掺杂浓度，可以精确控制由相互交织的小尺寸团聚纳米棒组成的合成后的花状SnO纳米结构的形貌。此外，通过在水介质中降解罗丹明B（RhB）染料研究的SnO光催化活性在10%摩尔铕掺杂时表现出优异的性能，这可能归因于其特定的形貌以及从BET测量中看到的较大表面积。此外，与纯SnO和其他掺杂样品相比，基于10%摩尔铕掺杂的SnO纳米结构的传感器在饮用水中最低浓度的镉（10 ppb）下显示出最高的荧光猝灭效率（0.23），检测限低至7 ppb；0.007 μg mL。详细讨论了铕掺杂SnO纳米结构的形成机理。
