通过电沉积和连续离子层吸附和反应（SILAR）方法，Pt/CdS/ZnS 共敏化 TiO₂ 纳米管阵列的催化活性增强。
Enhanced Catalytic Activities of TiO₂ Nanotube Arrays Co-Sensitized with Pt/CdS/ZnS via Electrodeposition and Successive Ionic Layer Adsorption and Reaction (SILAR) Method Approach.
机构信息
Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam.
Institute of Chemistry, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam.
出版信息
J Nanosci Nanotechnol. 2021 Dec 1;21(12):6111-6119. doi: 10.1166/jnn.2021.19531.
In this work, we have synthesized a nanocomposite ZnS/CdS/Pt/TiO₂ nanotube arrays (denoted ZCP-NTAs). Firstly, TiO₂ nanotube array (NTAs) material was fabricated by the anodic method of a titanium plate in an electrolyte solution containing 0.35 M NaHSO₄ and 0.24 M NaF and incubated in the air at 500 ºC for 2 hours. After that, pulsed electrodeposition technology was used to decorate platinum nanoparticles (denoted as Pt NPs) onto the surface of TiO₂ nanotubes to form P-NTAs photoelectrodes. Then, the SILAR method is used to deposition CdS quantum dots (symbolized as CdS QDs) on the surface of P-NTAs to form CP-NTAs material. Finally, by the SILAR method, a ZnS passive layer that protects against optical corrosion and inhibits recombination of e/h pairs was coated onto the CP-NTAs to form ZCP-NTAs material. As-prepared ZCP-NTAs photocatalytic material has good absorbability of light in the visible region with light absorption wavelength up to 608 nm, photon conversion efficiency up to 5.32% under light intensity AM1.5G, and decomposition efficiency of 10 mg L methyl orange (MO) in 120 minutes reached 91.50%. This material promises to bring high application ability in the photocatalytic field applied for environmental treatment and other applications.
在这项工作中，我们合成了一种纳米复合材料 ZnS/CdS/Pt/TiO₂ 纳米管阵列（表示为 ZCP-NTAs）。首先，通过在含有 0.35 M NaHSO₄ 和 0.24 M NaF 的电解质溶液中对钛板进行阳极处理的方法制备 TiO₂ 纳米管阵列（NTAs）材料，并在空气中 500 ºC 下孵育 2 小时。之后，使用脉冲电沉积技术将铂纳米颗粒（表示为 Pt NPs）沉积到 TiO₂ 纳米管的表面上，形成 P-NTAs 光电电极。然后，使用 SILAR 方法在 P-NTAs 的表面上沉积 CdS 量子点（表示为 CdS QDs），形成 CP-NTAs 材料。最后，通过 SILAR 方法，在 CP-NTAs 上涂覆一层 ZnS 无源层，以防止光腐蚀并抑制 e/h 对的复合，形成 ZCP-NTAs 材料。所制备的 ZCP-NTAs 光催化材料在可见光区域具有良好的吸光性，光吸收波长可达 608nm，在光强 AM1.5G 下的光子转换效率高达 5.32%，在 120 分钟内可分解 10mg L 甲基橙（MO）的分解效率达到 91.50%。这种材料有望在光催化领域应用于环境处理等方面带来高的应用能力。
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