球形钕取代的ZnFeO纳米颗粒的光催化活性增强
Enhanced Photocatalytic Activity of Spherical Nd Substituted ZnFeO Nanoparticles.
作者信息
Nguyen Loan T T, Nguyen Hang T T, Le Thieng H, Nguyen Lan T H, Nguyen Hai Q, Pham Thanh T H, Bui Nguyen D, Tran Ngan T K, Nguyen Duyen Thi Cam, Lam Tan Van, Tran Thuan Van
机构信息
Faculty of Chemistry, Thai Nguyen University of Education, Thai Nguyen 24000, Vietnam.
Faculty of Fundamental Sciences, Thai Nguyen University of Technology, Thai Nguyen 24000, Vietnam.
出版信息
Materials (Basel). 2021 Apr 19;14(8):2054. doi: 10.3390/ma14082054.
In this study, nanocrystalline ZnNdFeO ferrites with x = 0.0, 0.01, 0.03 and 0.05 were fabricated and used as a catalyst for dye removal potential. The effect of Nd ions substitution on the structural, optical and photo-Fenton activity of ZnNdFeO has been investigated. The addition of Nd ions caused a decrease in the grain size of ferrites, the reduction of the optical bandgap energies and thus could be well exploited for the catalytic study. The photocatalytic activity of the ferrite samples was evaluated by the degradation of Rhodamine B (RhB) in the presence of HO under visible light radiation. The results indicated that the ZnNdFeO samples exhibited higher removal efficiencies than the pure ZnFeO ferrites. The highest degradation efficiency was 98.00%, attained after 210 min using the ZnNdFeO sample. The enhanced photocatalytic activity of the ZnFeO doped with Nd is explained due to the efficient separation mechanism of photoinduced electron and holes. The effect of various factors (HO oxidant concentration and catalyst loading) on the degradation of RhB dye was clarified.
在本研究中，制备了x = 0.0、0.01、0.03和0.05的纳米晶ZnNdFeO铁氧体，并将其用作具有染料去除潜力的催化剂。研究了Nd离子取代对ZnNdFeO的结构、光学和光芬顿活性的影响。Nd离子的加入导致铁氧体晶粒尺寸减小、光学带隙能量降低，因此可很好地用于催化研究。通过在可见光辐射下在HO存在下罗丹明B（RhB）的降解来评估铁氧体样品的光催化活性。结果表明，ZnNdFeO样品比纯ZnFeO铁氧体表现出更高的去除效率。使用ZnNdFeO样品在210分钟后达到的最高降解效率为98.00%。掺杂Nd的ZnFeO光催化活性增强的原因是光生电子和空穴的有效分离机制。阐明了各种因素（HO氧化剂浓度和催化剂负载量）对RhB染料降解的影响。
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