Photocatalytic performance of Nd-TiO2 coatings: effect of voltage and frequency

IF 1.3 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Emerging Materials Research Pub Date : 2023-06-01 DOI:10.1680/jemmr.22.00063

Yuanji Shi, Y.Q. Dai, Junwan Li, Cheng Cheng, Jingxiao Li

引用次数: 1

Abstract

The Nd-TiO2 micro-arc oxidation (MAO) coatings were formed in phosphate-based electrolyte with the addition of Nd2O3 using suitable voltage and frequency. SEM results revealed that the coatings were varied with different voltage and frequency. And composition analysis showed the Nd-TiO2 coatings are mainly composed of anatase and rutile phase. Meanwhile, the anatase content increased and then decreased. In addition, XPS results indicated that the Ti2p spin-orbit components of Nd-TiO2 coatings are shifted towards higher binding energy, suggesting that some of the Nd3+ ions are combined with TiO2 lattice and led dislocation. Furthermore, the photocatalytic experiment results showed that the photocatalytic activity of Nd-TiO2 coatings can be greatly enhanced with moderate amount of Nd3+. However, excessive amount of Nd3+ is not of an effective impact on the improvement of photocatalytic activity.

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Nd-TiO2涂层的光催化性能：电压和频率的影响

采用适当的电压和频率，在磷酸盐电解质中添加Nd2O3，制备了Nd-TiO2微弧氧化（MAO）涂层。扫描电镜结果表明，涂层随电压和频率的变化而变化。成分分析表明，Nd-TiO2涂层主要由锐钛矿相和金红石相组成。同时，锐钛矿含量先增加后减少。此外，XPS结果表明，Nd-TiO2涂层的Ti2p自旋轨道成分向更高的结合能移动，表明部分Nd3+离子与TiO2晶格和led位错结合。此外，光催化实验结果表明，适量的Nd3+可以大大提高Nd-TiO2涂层的光催化活性。然而，过量的Nd3+对光催化活性的提高没有有效影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Emerging Materials Research MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

9.10%

发文量

期刊介绍： Materials Research is constantly evolving and correlations between process, structure, properties and performance which are application specific require expert understanding at the macro-, micro- and nano-scale. The ability to intelligently manipulate material properties and tailor them for desired applications is of constant interest and challenge within universities, national labs and industry.