有效地采用了多步骤程序来合成包含钛酸钠(Na2Ti3O7)纳米线核心的创新三维(3D)异质结构,中间间苯二酚-甲醛(RF)层,和外部银(Ag)纳米粒子鞘,被称为Na2Ti3O7@RF@Ag异质结构。最初,一步水热技术促进了单晶Na2Ti3O7纳米线在柔性Ti箔上的直接生长。随后,两步湿化学过程有助于在低反应温度下将RF层和Ag纳米颗粒顺序沉积到Na2Ti3O7纳米线上。硝酸银和L-抗坏血酸的最佳浓度可以导致Na2Ti3O7@RF@Ag异质结构的培养表现出增强的表面增强拉曼散射(SERS),这对于罗丹明B(RhB)分子的检测特别有利。这种现象可以归因于Na2Ti3O7@RF@Ag异质结构的独特几何形状,提供了更多的热点和表面活性位点,从而展示了显著的SERS增强,值得称赞的再现性,和持久的长期稳定。此外,Na2Ti3O7@RF@Ag异质结构作为一级化学动力学和可回收光催化剂,在紫外线照射下对RhB溶液进行光分解,具有显着的后续作用。该结果可归因于电子-空穴对重组的抑制增强和表面活性位点增加。
A multi-step procedure was effectively employed to synthesize innovative three-dimensional (3D) heterostructures encompassing sodium titanate (Na2Ti3O7) nanowire cores, an intermediate resorcinol-formaldehyde (RF) layer, and outer silver (Ag) nanoparticle sheaths, referred to as Na2Ti3O7@RF@Ag heterostructures. Initially, a one-step hydrothermal technique facilitated the direct growth of single-crystal Na2Ti3O7 nanowires onto a flexible Ti foil. Subsequently, a two-step wet chemical process facilitated the sequential deposition of an RF layer and Ag nanoparticles onto the Na2Ti3O7 nanowires at a low reaction temperature. Optimal concentrations of silver nitrate and L-ascorbic acid can lead to the cultivation of Na2Ti3O7@RF@Ag heterostructures exhibiting heightened surface-enhanced Raman scattering (SERS), which is particularly beneficial for the detection of rhodamine B (RhB) molecules. This phenomenon can be ascribed to the distinctive geometry of the Na2Ti3O7@RF@Ag heterostructures, which offer an increased number of hot spots and surface-active sites, thereby showcasing notable SERS enhancement, commendable reproducibility, and enduring stability over the long term. Furthermore, the Na2Ti3O7@RF@Ag heterostructures demonstrate remarkable follow-up as first-order chemical kinetic and recyclable photocatalysts for the photodecomposition of an RhB solution under UV light irradiation. This result can be attributed to the enhanced inhibition of electron-hole pair recombination and increased surface-active sites.