Panwar Sagar, Kumar Vinod, Purohit L P
Semiconductor Research Lab, Department of Physics, Gurukula Kangri (Deemed University), Haridwar, India.
Department of Physics, University of the West Indies, St. Augustine Campus, St. Augustine, Trinidad and Tobago.
Sci Rep. 2024 Sep 12;14(1):21341. doi: 10.1038/s41598-024-72186-5.
The Gd-doped ZnO/SnO nanocomposites with various atomic percentages (0, 0.5, 0.8, and 1.2 at%) of gadolinium (coded as GdZS0, GdZS1, GdZS2, and GdZS3) was synthesis via the sol-gel method and explored for photodegradation against dye solutions exposing solar light irradiation. The synthesized nanocomposites were characterized employing the XRD, FTIR, FE-SEM, Raman spectroscopy, BET analysis and UV-Vis spectrophotometer. The FE-SEM results indicated that the formation of nanoparticles to nanoflowers covered with Gd ions was observed with an increased doping concentration of Gd. The optical bandgap was evaluated and found in the range of 3.21-3.27 eV for GdZS nanocomposites. The GdZS nano-photocatalysts were investigated against the degradation of different organic dyes and GdZS3 shows the highest degradation efficiencies of 99.3%, 98.3% and 99.4% towards MO, MB and RhB dyes, respectively at neutral pH in aqueous media. Before and after photodegradation. Biological oxygen demand and chemical oxygen demand tests to make estimations of mineralization. The investigations are very promising for the degradation process in rare earth doped metal oxide nanocomposites. A plausible photodegradation mechanism of synthesized nanocomposites under investigation has also been proposed.
采用溶胶-凝胶法合成了具有不同钆原子百分比（0、0.5、0.8和1.2原子%）的钆掺杂氧化锌/氧化锡纳米复合材料（分别编码为GdZS0、GdZS1、GdZS2和GdZS3），并研究了其在太阳光照射下对染料溶液的光降解性能。采用X射线衍射仪、傅里叶变换红外光谱仪、场发射扫描电子显微镜、拉曼光谱仪、比表面积分析仪和紫外可见分光光度计对合成的纳米复合材料进行了表征。场发射扫描电子显微镜结果表明，随着钆掺杂浓度的增加，观察到形成了被钆离子覆盖的纳米颗粒到纳米花。对GdZS纳米复合材料的光学带隙进行了评估，发现其在3.21-3.27 eV范围内。研究了GdZS纳米光催化剂对不同有机染料的降解性能，在中性pH值的水介质中，GdZS3对甲基橙、亚甲基蓝和罗丹明B染料的降解效率分别高达99.3%、98.3%和99.4%。在光降解前后，进行了生化需氧量和化学需氧量测试以估算矿化程度。这些研究对于稀土掺杂金属氧化物纳米复合材料的降解过程非常有前景。还提出了正在研究的合成纳米复合材料的一种合理的光降解机理。
